AndroidActivityGroup和TabActiviy的差异性

标签： android activitygroup tabactiviy 差异性 杂谈

分类：Android技术

1)<wbr>ActivityGroup</wbr><wbr><wbr></wbr></wbr>

<wbr><wbr><wbr><span size="+0" style="word-wrap:normal; word-break:normal; line-height:24px">根据SDK的解释其功能“<span style="color:#ED1C24; word-wrap:normal; word-break:normal"><strong>A screen that contains and runs multiple embedded activities.”。</strong><span style="color:#000000; word-wrap:normal; word-break:normal">翻译成汉语也就是大概</span></span><span style="font-weight:bold"><span style="color:#ED1C24; word-wrap:normal; word-break:normal">"<span style="word-wrap:normal; word-break:normal; line-height:normal; font-weight:normal; font-size:12px; font-family:宋体,微软雅黑,'Lucida Grande',Geneva,Arial,Verdana,'Lucida sans Unicode',Helvetica,sans-serif; color:rgb(112,112,112); border-collapse:separate"><span style="word-wrap:normal; word-break:normal; line-height:19px; font-size:13px"><strong><span style="color:#ED1C24; word-wrap:normal; word-break:normal">在Android中，ActivityGroup类是Activity的容器，可以包含多个嵌套进来的Activitys</span></strong></span></span>".<span style="word-wrap:normal; word-break:normal; line-height:normal; font-weight:normal; font-size:12px; font-family:宋体,微软雅黑,'Lucida Grande',Geneva,Arial,Verdana,'Lucida sans Unicode',Helvetica,sans-serif; color:rgb(112,112,112); border-collapse:separate"><span style="word-wrap:normal; word-break:normal; line-height:19px; font-size:13px"><span style="color:#000000; word-wrap:normal; word-break:normal">接下来依然采用源码分析的方式来了解该类的内部实现。</span></span></span></span></span></span></wbr></wbr></wbr>

<wbr><wbr><wbr><span style="color:#000000; word-wrap:normal; word-break:normal">首先，从SDK中和源码中都可以获知，ActivityGroup类的父类是Activity，也就是说二者具有相同的接口和生命周期，同Activity一样，也有onCreate()、onPause()等函数可供我们重载。在ActivityGroup的源码中有成员变量<br><wbr><wbr><wbr>protected LocalActivityManager mLocalActivityManager;<br> 该变量在ActivityGroup的构造函数中创建并初始化，可见，ActivityGroup的功能实现肯定是要委托给这个对象来完成了。为了给用户开放对此对象的访问，ActivityGroup提供了</wbr></wbr></wbr></span></wbr></wbr></wbr>

<wbr></wbr>

12345

public final LocalActivityManager getLocalActivityManager() {<wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>return</strong></span> mLocalActivityManager<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span></wbr></wbr>

通过浏览ActivityGroup的源码可以发现，几乎全部是以通过LocalActivityManager对象来完成的具体动作，比如：

1234567891011

protected void onCreate(Bundle savedInstanceState) {<wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>super</strong></span>.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">onCreate</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>savedInstanceState<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr> Bundle states <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> savedInstanceState <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">!=</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,0,102); background-color:transparent"><strong>null</strong></span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">?</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>Bundle<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span> savedInstanceState.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">getBundle</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>STATES_KEY<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">:</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,0,102); background-color:transparent"><strong>null</strong></span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr> mLocalActivityManager.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">dispatchCreate</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>states<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span></wbr></wbr></wbr></wbr></wbr>

下面，我们就来看一下LocalActivityManager的源码。在该类中，提供了一个私有类

123456789101112131415161718192021222324252627

private static class LocalActivityRecord extends Binder {<wbr> LocalActivityRecord<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,51,153); background-color:transparent">String</span> _id, Intent _intent<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">{</span><wbr> id <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> _id<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr> intent <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> _intent<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span><wbr><wbr><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>final</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,51,153); background-color:transparent">String</span> id<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(102,102,102); background-color:transparent"><em>// Unique name of this record.</em></span><wbr> Intent intent<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(102,102,102); background-color:transparent"><em>// Which activity to run here.</em></span><wbr> ActivityInfo activityInfo<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(102,102,102); background-color:transparent"><em>// Package manager info about activity.</em></span><wbr> Activity activity<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(102,102,102); background-color:transparent"><em>// Currently instantiated activity.</em></span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,51,153); background-color:transparent">Window</span> window<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(102,102,102); background-color:transparent"><em>// Activity's top-level window.</em></span><wbr> Bundle instanceState<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(102,102,102); background-color:transparent"><em>// Last retrieved freeze state.</em></span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,0,102); background-color:transparent"><strong>int</strong></span> curState <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> RESTORED<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(102,102,102); background-color:transparent"><em>// Current state the activity is in.</em></span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

用于保存Activity的信息，并提供了

1234567

private final Map<String, LocalActivityRecord> mActivities<wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>new</strong></span> HashMap<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">&lt;</span>String, LocalActivityRecord<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">&gt;</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>private</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>final</strong></span> ArrayList<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">&lt;</span>LocalActivityRecord<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">&gt;</span> mActivityArray<wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>new</strong></span> ArrayList<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">&lt;</span>LocalActivityRecord<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">&gt;</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span></wbr></wbr></wbr>

采用这样的数据结构用于对所有嵌入的子Activity信息进行保存处理。其中前者用于通过String快速查找，后者用于以数组的方式快速访问，是典型的以空间换时间的的方式。

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647

public void dispatchCreate(Bundle state) {<wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>if</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>state <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">!=</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,0,102); background-color:transparent"><strong>null</strong></span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">{</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>final</strong></span> Iterator<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">&lt;</span>String<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">&gt;</span> i <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> state.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">keySet</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span>.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">iterator</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>while</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>i.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">hasNext</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">{</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>try</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">{</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>final</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,51,153); background-color:transparent">String</span> id <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> i.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">next</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>final</strong></span> Bundle astate <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> state.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">getBundle</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>id<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr> LocalActivityRecord r <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> mActivities.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">get</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>id<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>if</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>r <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">!=</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,0,102); background-color:transparent"><strong>null</strong></span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">{</span><wbr> r.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">instanceState</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> astate<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>else</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">{</span><wbr> r <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>new</strong></span> LocalActivityRecord<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>id, <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,0,102); background-color:transparent"><strong>null</strong></span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr> r.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">instanceState</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> astate<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr> mActivities.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">put</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>id, r<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr> mActivityArray.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">add</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>r<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>catch</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,51,153); background-color:transparent">Exception</span> e<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">{</span><wbr>……<wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span><wbr><wbr><wbr> mCurState <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> CREATED<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

从这里我们可以看出，当有一个ActivityGroup被Create的时候，就会有对应的Activity信息被保存到数组中。

当我们调用LocalActivityManager的startActivity()以产生Window的时候，我们也可以看到

123456789101112131415161718192021222324252627

public Window startActivity(String id, Intent intent) {<wbr> ……<wbr> LocalActivityRecord r <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> mActivities.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">get</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>id<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>if</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>r <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">==</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,0,102); background-color:transparent"><strong>null</strong></span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">{</span><wbr> r <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>new</strong></span> LocalActivityRecord<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>id, intent<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr> adding <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">=</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,0,102); background-color:transparent"><strong>true</strong></span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span><wbr> ……<wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; background-color:transparent"><strong>if</strong></span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>adding<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span> <span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">{</span><wbr> mActivities.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">put</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>id, r<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr> mActivityArray.<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,102,51); background-color:transparent">add</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">(</span>r<span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">)</span><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(51,153,51); background-color:transparent">;</span><wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span><wbr> ……<wbr><span style="word-wrap:normal; word-break:normal; border:0px; padding:0px; margin:0px; color:rgb(0,153,0); background-color:transparent">}</span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

有了这个数组，就可以遍历到ActivityGroup中嵌入的Activitys了，从而可以实现ActivityGroup的功能。

以上的分析结果产生的类图如下：

其核心的方面主要体现在：

<wbr><wbr><wbr><wbr><wbr><wbr>Intent i = new Intent(MainActivity.this,IndexActivity.class);<br><wbr><wbr><wbr><wbr><wbr><wbr>Window indexWindow = localManager.startActivity(INDEX_ID, i);<br><wbr><wbr><wbr><wbr><wbr><wbr>indexDecorView = indexWindow.getDecorView();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr>localManager = this.getLocalActivityManager();</wbr></wbr></wbr></wbr></wbr>

然后将view加进你想要用的模块，多个view之间控制好隐藏和显示，就可以了，用activityGroup你会被焦点的问题搞郁闷，我现在一直纠结，如何在window 之间切换，或者request到focus，有这个方面的经验可以谈下。

范例1 使用ActivityGroup来切换Activity和Layout

<wbr><wbr><wbr></wbr></wbr></wbr>在一个主界面中做Activity切换一般都会用TabActivity，使用方便，Activity互相之间相对独立，但是可定制性不强，而且修改起来很麻烦。当然也可以把layout分开，把逻辑代码全写在主界面的逻辑代码中，但是很明显可维护性相当差，这里通过ActivityGroup来解决这个问题。
一、效果图

　　　　ActivityGroup和TabActiviy的差异性" src="https://img.it610.com/image/product/b6e2ff846c5f42c6b505c6fc1694f2a3.jpg" width="323" style="margin: 0px; padding: 0px; border: 0px;;border:1px solid black;">

　　　　要求点击底部不同图片按钮切换不同的Activity，并在中间显示Activity对应的ContentView。

<wbr></wbr>

　　二、 实现代码

　　　　2.1　　layout.xml

<?xml<wbr>version="1.0"<wbr>encoding="utf-8"</wbr></wbr>?>
<LinearLayout<wbr></wbr>xmlns:android="http://schemas.android.com/apk/res/android"
<wbr><wbr><wbr><wbr>android:layout_width</wbr></wbr></wbr></wbr> ="fill_parent"<wbr>android:orientation</wbr>="vertical"
<wbr><wbr><wbr><wbr>android:layout_height</wbr></wbr></wbr></wbr> ="fill_parent">
<wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr> <LinearLayout<wbr></wbr>android:gravity="center_horizontal"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:background</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="@drawable/myinfor2"<wbr>android:layout_width</wbr>="fill_parent"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_height</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="wrap_content">
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> <TextView<wbr></wbr>android:id="@+id/cust_title"<wbr>android:textColor</wbr>="@android:color/white"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:textSize</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="28sp"<wbr>android:text</wbr>="模块1"<wbr>android:layout_width</wbr>="wrap_content"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_height</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="wrap_content"></TextView>
<wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr> </LinearLayout>
<wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr> <!--<wbr>中间动态加载View<wbr></wbr></wbr>-->
<wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr> <ScrollView<wbr></wbr>android:measureAllChildren="true"<wbr>android:id</wbr>="@+id/containerBody"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_weight</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="1"<wbr>android:layout_height</wbr>="fill_parent"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_width</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="fill_parent">
<wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr> </ScrollView>
<wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr> <LinearLayout<wbr></wbr>android:background="@android:color/black"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_gravity</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="bottom"<wbr>android:orientation</wbr>="horizontal"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_width</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="fill_parent"<wbr>android:layout_height</wbr>="wrap_content">
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> <!--<wbr>功能模块按钮1<wbr></wbr></wbr>-->
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> <ImageView<wbr></wbr>android:id="@+id/btnModule1"<wbr>android:src</wbr>="@android:drawable/ic_dialog_dialer"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_marginLeft</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="7dp"<wbr>android:layout_marginTop</wbr>="3dp"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_marginBottom</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="3dp"<wbr>android:layout_width</wbr>="wrap_content"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_height</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="wrap_content"<wbr></wbr>/>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> <!--<wbr>功能模块按钮2<wbr></wbr></wbr>-->
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> <ImageView<wbr></wbr>android:id="@+id/btnModule2"<wbr>android:src</wbr>="@android:drawable/ic_dialog_info"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_marginLeft</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="7dp"<wbr>android:layout_marginTop</wbr>="3dp"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_marginBottom</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="3dp"<wbr>android:layout_width</wbr>="wrap_content"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_height</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="wrap_content"<wbr></wbr>/>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> <!--<wbr>功能模块按钮3<wbr></wbr></wbr>-->
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> <ImageView<wbr></wbr>android:id="@+id/btnModule3"<wbr>android:src</wbr>="@android:drawable/ic_dialog_alert"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_marginLeft</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="7dp"<wbr>android:layout_marginTop</wbr>="3dp"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_marginBottom</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="3dp"<wbr>android:layout_width</wbr>="wrap_content"
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>android:layout_height</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr> ="wrap_content"<wbr></wbr>/>
<wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr> </LinearLayout>
</LinearLayout>

　2.2　　TestView.java

public<wbr></wbr>class<wbr>TestView<wbr></wbr></wbr>extends <wbr>ActivityGroup<wbr>{<br><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr>private<wbr>ScrollView<wbr>container<wbr></wbr></wbr></wbr>=<wbr></wbr>null ;
<wbr><wbr><wbr><wbr>@Override<br><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>protected<wbr></wbr>void <wbr>onCreate(Bundle<wbr>savedInstanceState)<wbr>{<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>super .onCreate(savedInstanceState);
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>//<wbr>隐藏标题栏</wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>requestWindowFeature(Window.FEATURE_NO_TITLE);<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>//<wbr>设置视图</wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>setContentView(R.layout.layout);<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>container<wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>= <wbr>(ScrollView)<wbr>findViewById(R.id.containerBody);<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>//<wbr>模块1</wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>ImageView<wbr>btnModule1<wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>= <wbr>(ImageView)<wbr>findViewById(R.id.btnModule1);<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>btnModule1.setOnClickListener(</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>new <wbr>OnClickListener()<wbr>{<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>@Override<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>public<wbr></wbr>void <wbr>onClick(View<wbr>v)<wbr>{<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>container.removeAllViews();<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>container.addView(getLocalActivityManager().startActivity(<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>"Module1" ,
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>new<wbr>Intent(TestView.</wbr>this,<wbr>ModuleView1.</wbr>class )
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.getDecorView());<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>})<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>//<wbr>模块2</wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>ImageView<wbr>btnModule2<wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>= <wbr>(ImageView)<wbr>findViewById(R.id.btnModule2);<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>btnModule2.setOnClickListener(</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>new <wbr>OnClickListener()<wbr>{<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>@Override<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>public<wbr></wbr>void <wbr>onClick(View<wbr>v)<wbr>{<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>container.removeAllViews();<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>container.addView(getLocalActivityManager().startActivity(<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>"Module2" ,
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>new<wbr>Intent(TestView.</wbr>this,<wbr>ModuleView2.</wbr>class )
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.getDecorView());<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>});<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>//<wbr>模块3</wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>ImageView<wbr>btnModule3<wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>= <wbr>(ImageView)<wbr>findViewById(R.id.btnModule3);<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>btnModule3.setOnClickListener(</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>new <wbr>OnClickListener()<wbr>{<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>@Override<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>public<wbr></wbr>void <wbr>onClick(View<wbr>v)<wbr>{<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>container.removeAllViews();<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>container.addView(getLocalActivityManager().startActivity(<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>"Module3" ,
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>new<wbr>Intent(TestView.</wbr>this,<wbr>ModuleView3.</wbr>class )
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.getDecorView());<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>});<br><wbr><wbr><wbr><wbr>}<br> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

　　　　代码说明：

　　　　　　a).　　ModuleView1、ModuleView2、ModuleView3分别继承自Activity。

　　　　　　b).　　想动态改变标题可以通过cust_title获取TextView进行设置。　

注释：想代码实现将子activity的所用的layout加入到主activty中的layout

　　public class FormActivity extends ActivityGroup {

　　@Override

　　protected void onCreate(Bundle savedInstanceState) {

　　super.onCreate(savedInstanceState);

　　setContentView(R.layout.form);

　　LocalActivityManager m = getLocalActivityManager();

　　Intent intent = new Intent().setClass(this, ContactFieldActivity.class);

　　Window w = m.startActivity("tratat", intent);

　　View v = w.getDecorView();

　　LinearLayout container = (LinearLayout)findViewById(R.id.fieldsContainer);

　　container.addView(v);

　　}

　　}

<wbr>范例<wbr>2<wbr>ActivityGroup + GridView 实现Tab分页标签</wbr></wbr></wbr>

<wbr><wbr><wbr><a href="http://blog.csdn.net/hellogv/article/details/6057174" style="text-decoration:none; color:rgb(41,113,187)">http://blog.csdn.net/hellogv/article/details/6057174</a></wbr></wbr></wbr>

<wbr></wbr>

<wbr></wbr>2) tabActivity

<wbr><wbr><wbr>tabActivity继承自Activity，其内部定义好了TabHost，可以通过getTabHost()获取。TabHost 包含了两种子元素：一些可以自由选择的Tab 和tab对应的内容tabContentto，在Layout的&lt;TabHost&gt;下它们分别对应 TabWidget和FrameLayout。 <div>　　使用TabActivity可以让同一个界面容纳更多的内容。我们将按照Standup Timer里的TeamDetailsActivity来讲述TabActivity的使用。在该例中，包含了两个Tab一个用于展示team的统计信息，一个用于展示team所参加的会议的列表（这是一个ListView）。</div> <div> <h2 style="margin:0px; padding:0px; border:0px; list-style:none; color:rgb(0,0,0); line-height:1.5"> <span style="word-wrap:normal; word-break:normal; line-height:normal; font-weight:normal; font-size:14px; border-collapse:separate">创建Layout<wbr></wbr></span> </h2> <div style="padding:0px; margin:0px">　　这里需要注意的是不管你是使用TabActivity 还是自定义TabHost，都要求以TabHost作为XML布局文件的根。 <div style="border:1px solid rgb(204,204,204); padding:5px; overflow:auto; font-size:12px; margin:0px; word-break:break-all; font-family:'Courier new'; background-color:rgb(245,245,245)"> <pre style="white-space:normal; padding:0px; margin-top:0px; margin-bottom:0px; font-family:'Courier new'; word-wrap:break-word"></pre> <div style="padding:0px; margin:0px"> <span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&lt;?</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,255)">xml version="1.0" encoding="utf-8"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">?&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&lt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(128,0,0)">TabHost</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">xmlns:android</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="http://schemas.android.com/apk/res/android"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)"><br style="padding:0px; margin:0px"> android:id</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="@android:id/tabhost"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:layout_width</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)"><br style="padding:0px; margin:0px"> android:layout_height</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&lt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(128,0,0)">LinearLayout</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:orientation</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="vertical"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)"><br style="padding:0px; margin:0px"> android:layout_width</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:layout_height</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&lt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(128,0,0)">TabWidget</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:id</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="@android:id/tabs"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)"><br style="padding:0px; margin:0px"> android:layout_width</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:layout_height</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="wrap_content"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">/&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&lt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(128,0,0)">FrameLayout</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:id</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="@android:id/tabcontent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)"><br style="padding:0px; margin:0px"> android:layout_width</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:layout_height</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)"><br style="padding:0px; margin:0px"><br style="padding:0px; margin:0px"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,128,0)">&lt;!--</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,128,0)">省略部分代码</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,128,0)">--&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)"><br style="padding:0px; margin:0px"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&lt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(128,0,0)">TextView</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:id</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="@+id/no_team_meetings"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)"><br style="padding:0px; margin:0px"> android:textSize</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="18sp"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:layout_width</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)"><br style="padding:0px; margin:0px"> android:layout_height</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">/&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)"><br style="padding:0px; margin:0px"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&lt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(128,0,0)">TextView</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:id</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="@+id/no_team_meeting_stats"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)"><br style="padding:0px; margin:0px"> android:textSize</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="18sp"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)">android:layout_width</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(255,0,0)"><br style="padding:0px; margin:0px"> android:layout_height</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">="fill_parent"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">/&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&lt;/</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(128,0,0)">FrameLayout</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&lt;/</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(128,0,0)">LinearLayout</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&lt;/</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(128,0,0)">TabHost</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">&gt;</span> </div> </div> <p style="margin:5px auto; padding-top:0px; padding-bottom:0px; border:0px; list-style:none; word-wrap:normal; word-break:normal"> <wbr></wbr></p> </div> <div style="padding:0px; margin:0px">通常我们采用线性布局所以&lt;TabHost&gt; 的子元素是 &lt;LinearLayout&gt;。&lt;TabWidger&gt;对应Tab。&lt;FrameLayout&gt;则用于包含Tab需要展示的内容。需要注意的是&lt;TabWidger&gt; 和&lt;FrameLayout&gt;的Id 必须使用系统id，分别为android:id/tabs 和 android：id/tabcontent 。因为系统会使用者两个id来初始化TabHost的两个实例变量（mTabWidget 和 mTabContent）。</div> <h2 style="margin:0px; padding:0px; border:0px; list-style:none; color:rgb(0,0,0); line-height:1.5"> 编写Java代码</h2> <div style="padding:0px; margin:0px">　　我们可以采用两种方法编写标签页：一种是继承TabActivity ,然后使用getTabHost()获取TabHost对象；第二种方法是使用自定的TabHost在布局文件上&lt;TabHost&gt;的自定义其ID，然后通过findViewById()，方法获得TabHost对象。</div> <div style="padding:0px; margin:0px">　　本文中采用继承TabActivity的方法。</div> <div style="padding:0px; margin:0px"> <div style="border:1px solid rgb(204,204,204); padding:5px; overflow:auto; font-size:12px; margin:0px; word-break:break-all; font-family:'Courier new'; background-color:rgb(245,245,245)"> <pre style="white-space:normal; padding:0px; margin-top:0px; margin-bottom:0px; font-family:'Courier new'; word-wrap:break-word"></pre> <div style="padding:0px; margin:0px"> <span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">private</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">void</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">createTabs() {<br style="padding:0px; margin:0px"> TabHost tabhost</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">=</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">getTabHost();<br style="padding:0px; margin:0px"> tabhost.addTab(tabhost.newTabSpec(</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">stats_tab</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">).<br style="padding:0px; margin:0px"> setIndicator(</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">this</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">.getString(R.string.stats)).<br style="padding:0px; margin:0px"> setContent(createMeetingDetails(team)));<br style="padding:0px; margin:0px"><br style="padding:0px; margin:0px"> tabhost.addTab(tabhost.newTabSpec(</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">meetings_tab</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">).<br style="padding:0px; margin:0px"> setIndicator(</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">this</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">.getString(R.string.meetings)).<br style="padding:0px; margin:0px"> setContent(createMeetingList()));<br style="padding:0px; margin:0px"> getTabHost().setCurrentTab(</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">0</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">);<br style="padding:0px; margin:0px"> }</span> </div> </div> <p style="margin:5px auto; padding-top:0px; padding-bottom:0px; border:0px; list-style:none; word-wrap:normal; word-break:normal"> <wbr></wbr></p> Java代码中我们首先需要做的是获取TabHost对象，可以通过TabActivtiy里的getTabHsot（）方法。如果是自定义TabHost，在添加Tabs前应该调用<span style="word-wrap:normal; word-break:normal"><wbr></wbr></span><a href="http://developer.android.com/reference/android/widget/TabHost.html" target="_blank" style="text-decoration:none; color:rgb(41,113,187)">setUp()</a>方法。</div> <div style="padding:0px; margin:0px"> <pre style="white-space:normal; padding:0px; margin-top:0px; margin-bottom:0px; word-wrap:break-word"></pre> <div style="border:1px solid rgb(204,204,204); padding:5px; overflow:auto; font-size:12px; margin:0px; word-break:break-all; font-family:'Courier new'; background-color:rgb(245,245,245)"> <pre style="white-space:normal; padding:0px; margin-top:0px; margin-bottom:0px; font-family:'Courier new'; word-wrap:break-word"></pre> <div style="padding:0px; margin:0px"> <span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">mTabHost</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">=</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">(TabHost)findViewById(R.id.tabhost);<br style="padding:0px; margin:0px"> mTabHost.setup();<br style="padding:0px; margin:0px"> mTabHost.addTab(TAB_TAG_1,</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">Hello, world!</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">,</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">Tab 1</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">);</span> </div> </div> <pre style="white-space:normal">SDK上的原文：</pre> <pre style="white-space:normal; padding:0px; margin-top:0px; margin-bottom:0px; word-wrap:break-word">　<span style="word-wrap:normal; word-break:normal; line-height:19px; padding:0px; font-size:10pt; margin:0px"><span style="padding:0px; margin:0px"><span style="font-family:Courier New; word-wrap:normal; word-break:normal">　Call setup() before adding tabs if loading TabHost using findViewById().<wbr><span style="padding:0px; margin:0px">However<wbr></wbr></span>:<wbr></wbr></wbr></span></span></span><span style="padding:0px; margin:0px">You do not need to call setup() after getTabHost() in<wbr><code style="padding:0px; margin:0px"><a href="http://developer.android.com/reference/android/app/TabActivity.html" style="text-decoration:none; color:rgb(41,113,187)">TabActivity</a></code>.<wbr></wbr></wbr></span></pre> <span style="padding:0px; margin:0px"><br style="padding:0px; margin:0px"></span>　　接着向TabHost添加tabs.即调用tabHost.addTab(TabSpec) 方法。<a href="http://developer.android.com/reference/android/widget/TabHost.TabSpec.html" target="_blank" style="text-decoration:none; color:rgb(41,113,187)">TabSpec</a>主要包含了setIndicator 和 setContent 方法，通过这两个方法来指定Tab 和 TanContent。</div> <div style="padding:0px; margin:0px">　　TabSpec 通过<wbr><span style="word-wrap:normal; word-break:normal; padding:0px; margin:0px">.newTabSpec(String tag</span><span style="word-wrap:normal; word-break:normal; padding:0px; margin:0px">)来创建实例。实例化后对其属性进行设置。setIndicator()设置tab,它有3个重载的函数</span></wbr> </div> <div style="padding:0px; margin:0px"> <ul style="margin:0px 0px 0px 45px; padding:0px; border:0px; list-style-position:initial"> <li style="margin:0px; padding:0px; border:0px; list-style:disc">　public TabHost.TabSpec　setIndicatior(CharSwquence label,Drawable icon).指定tab的标题和图标。</li> <li style="margin:0px; padding:0px; border:0px; list-style:disc">public TabHost.TabSpec (View view)通过View来自定义tab</li> <li style="margin:0px; padding:0px; border:0px; list-style:disc">public TabHost.TabSpec(CharSequence label) 指定tab的标题，此时无图标。</li> </ul> <div style="padding:0px; margin:0px">　 <wbr>setContent 指定tab的展示内容，它也有3种重载</wbr> </div> </div> <div style="padding:0px; margin:0px"> <ul style="margin:0px 0px 0px 45px; padding:0px; border:0px; list-style-position:initial"> <li style="margin:0px; padding:0px; border:0px; list-style:disc">public TabHost.TabSpec setContent(TabHost.TabContentFactory )</li> <li style="margin:0px; padding:0px; border:0px; list-style:disc">public TabHost.TabSpec setContent(int ViewId)</li> <li style="margin:0px; padding:0px; border:0px; list-style:disc">public TabHost.TabSpec setContent(Intent intent)</li> </ul> <div style="padding:0px; margin:0px">　　后两种方法比较后理解一个是通过 ViewId指定显示的内容，如.setContent(R.id.Team_EditText)。第三种则是直接通过Intent加载一个新的Activity页。如.setContent(new Intent(this, MeetingActivity.class)));</div> </div> <div style="padding:0px; margin:0px">　　本例中是通过<a href="http://developer.android.com/reference/android/widget/TabHost.TabContentFactory.html" target="_blank" style="text-decoration:none; color:rgb(41,113,187)">TabContentFactory</a><span style="word-wrap:normal; word-break:normal"><wbr></wbr></span>来指定对应的TabContent。<a href="http://developer.android.com/reference/android/widget/TabHost.TabContentFactory.html" target="_blank" style="text-decoration:none; color:rgb(41,113,187)">TabContentFactory</a><span style="word-wrap:normal; word-break:normal"><wbr></wbr></span>是一个接口，其只包含了 一个返回 View 的createTabContent(String tag)方法。</div> <div style="padding:0px; margin:0px"> <div style="border:1px solid rgb(204,204,204); padding:5px; overflow:auto; font-size:12px; margin:0px; word-break:break-all; font-family:'Courier new'; background-color:rgb(245,245,245)"> <pre style="white-space:normal; padding:0px; margin-top:0px; margin-bottom:0px; font-family:'Courier new'; word-wrap:break-word"></pre> <div style="padding:0px; margin:0px"> <span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">private</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">TabContentFactory createMeetingDetails(Team team2) {<br style="padding:0px; margin:0px"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">return</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">new</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">TabHost.TabContentFactory() {<br style="padding:0px; margin:0px"><br style="padding:0px; margin:0px"> @Override<br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">public</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">View createTabContent(String tag) {<br style="padding:0px; margin:0px"> 　　　　　　　　　　//设置View<br style="padding:0px; margin:0px"> setStatsTabContent();<br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">return</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">findViewById(R.id.teamStats);<br style="padding:0px; margin:0px"> }<br style="padding:0px; margin:0px"> };<br style="padding:0px; margin:0px"> }<br style="padding:0px; margin:0px"><br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">private</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">TabHost.TabContentFactory createMeetingList()<br style="padding:0px; margin:0px"> {<br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">return</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">new</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">TabHost.TabContentFactory() {<br style="padding:0px; margin:0px"><br style="padding:0px; margin:0px"> @Override<br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">public</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">View createTabContent(String tag) {</span> </div> <div style="padding:0px; margin:0px"> <span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">　　　　　　<br style="padding:0px; margin:0px"> meetingListAdapter</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">=</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">createMeetingListAdapter<wbr>();<br style="padding:0px; margin:0px"> meetingList.setAdapter(meetingListAdapter);<br style="padding:0px; margin:0px"></wbr></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">return</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">meetingList;<br style="padding:0px; margin:0px"> }<br style="padding:0px; margin:0px"> };<br style="padding:0px; margin:0px"> }</span> </div> </div> <p style="margin:5px auto; padding-top:0px; padding-bottom:0px; border:0px; list-style:none; word-wrap:normal; word-break:normal"> <wbr></wbr></p> <div style="padding:0px; margin:0px"></div> 事先声明好的</div> <div style="padding:0px; margin:0px"> <div style="border:1px solid rgb(204,204,204); padding:5px; overflow:auto; font-size:12px; margin:0px; word-break:break-all; font-family:'Courier new'; background-color:rgb(245,245,245)"> <pre style="white-space:normal; padding:0px; margin-top:0px; margin-bottom:0px; font-family:'Courier new'; word-wrap:break-word"></pre> <div style="padding:0px; margin:0px"> <span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">private</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">ListView meetingList</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">=</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">null</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">;<br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">private</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">ArrayAdapter</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">&lt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">String</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">&gt;</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">meetingListAdapter</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">=</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">null</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">;</span> </div> </div> <p style="margin:5px auto; padding-top:0px; padding-bottom:0px; border:0px; list-style:none; word-wrap:normal; word-break:normal"> <wbr></wbr></p> <div style="padding:0px; margin:0px">我们也可以让TabActivity去实现TabContentFactory 接口</div> <div style="padding:0px; margin:0px"> <div style="border:1px solid rgb(204,204,204); padding:5px; overflow:auto; font-size:12px; margin:0px; word-break:break-all; font-family:'Courier new'; background-color:rgb(245,245,245)"> <pre style="white-space:normal; padding:0px; margin-top:0px; margin-bottom:0px; font-family:'Courier new'; word-wrap:break-word"></pre> <div style="padding:0px; margin:0px"> <span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">public</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">class</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">Tabs2</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">extends</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">TabActivity</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">implements</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">TabHost.TabContentFactory</span> </div> </div> <p style="margin:5px auto; padding-top:0px; padding-bottom:0px; border:0px; list-style:none; word-wrap:normal; word-break:normal"> <wbr></wbr></p> 然后在TabActiviy类中实现createTabContent方法</div> <div style="padding:0px; margin:0px"> <div style="border:1px solid rgb(204,204,204); padding:5px; overflow:auto; font-size:12px; margin:0px; word-break:break-all; font-family:'Courier new'; background-color:rgb(245,245,245)"> <pre style="white-space:normal; padding:0px; margin-top:0px; margin-bottom:0px; font-family:'Courier new'; word-wrap:break-word"></pre> <div style="padding:0px; margin:0px"> <span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">@Override<br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">public</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">View createTabContent(String tag) {<br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">final</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">TextView tv</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">=</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">new</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">TextView(</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">this</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">);<br style="padding:0px; margin:0px"> tv.setText(</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">Content for tab with tag</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">+</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">tag);<br style="padding:0px; margin:0px"></span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,255)">return</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; margin:0px; color:rgb(0,0,0)">tv;<br style="padding:0px; margin:0px"> }</span> </div> </div> <p style="margin:5px auto; padding-top:0px; padding-bottom:0px; border:0px; list-style:none; word-wrap:normal; word-break:normal"> <wbr></wbr></p> </div> setStatsTabContent();方法</div> <div style="padding:0px; margin:0px"> <div style="border:1px solid rgb(204,204,204); padding:5px; overflow:auto; font-size:12px; margin:0px; word-break:break-all; font-family:'Courier new'; background-color:rgb(245,245,245)"> <img src="http://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif" name="code_img_closed_2fabc5ab-8d5e-4559-b451-8019572189d4" alt="Android&lt;wbr&gt;&lt;wbr&gt;&lt;wbr&gt;ActivityGroup和TabActiviy的差异性" title="Android&lt;wbr&gt;&lt;wbr&gt;&lt;wbr&gt;ActivityGroup和TabActiviy的差异性" style="margin:0px; padding:0px 5px 0px 0px; border:0px; list-style:none; vertical-align:middle"><span style="word-wrap:normal; word-break:normal; line-height:1.5; border:1px solid rgb(128,128,128); padding:2px; margin:0px; background-color:rgb(255,255,255)">setStatsTabContent</span> </div> <p style="margin:5px auto; padding-top:0px; padding-bottom:0px; border:0px; list-style:none; word-wrap:normal; word-break:normal"> <wbr></wbr></p> </div> <div style="padding:0px; margin:0px">　　最后将TabSpec 添加到 TabHost上，即tabHost.addTab(tabSpec)。我们发现TabSpec 的setIndicator 和 setContent 方法返回的都是 TabSpec 自身所以可以使用窜的方式编写代码：</div> <div style="border:1px solid rgb(204,204,204); padding:5px; overflow:auto; font-size:12px; margin:0px; word-break:break-all; font-family:'Courier new'; background-color:rgb(245,245,245)"> <h1 style="margin:0px; padding:0px; border:0px; list-style:none; color:rgb(0,0,0); line-height:1.5"> </h1> </div> <pre style="white-space:normal; padding:0px; font-size:12px; margin-top:0px; margin-bottom:0px; font-family:'Courier new'; word-wrap:break-word"></pre> <div style="padding:0px; margin:0px"> <span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; font-size:12px; margin:0px; color:rgb(0,0,0); font-family:'Courier new'">tabhost.addTab(tabhost.newTabSpec(</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; font-size:12px; margin:0px; color:rgb(0,0,0); font-family:'Courier new'">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; font-size:12px; margin:0px; color:rgb(0,0,0); font-family:'Courier new'">stats_tab</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; font-size:12px; margin:0px; color:rgb(0,0,0); font-family:'Courier new'">"</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; font-size:12px; margin:0px; color:rgb(0,0,0); font-family:'Courier new'">)<br style="padding:0px; margin:0px"> .setIndicator(</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; font-size:12px; margin:0px; color:rgb(0,0,255); font-family:'Courier new'">this</span><span style="word-wrap:normal; word-break:normal; line-height:1.5; padding:0px; font-size:12px; margin:0px; color:rgb(0,0,0); font-family:'Courier new'">.getString(R.string.stats))<br style="padding:0px; margin:0px"> .setContent(createMeetingDetails(team)));</span> </div> </div> </wbr></wbr></wbr> <wbr></wbr> <wbr></wbr> 3）两者之间的差异性

在一个主界面中做Activity切换一般都会用TabActivity，使用方便，Activity互相之间相对独立，但是可定制性不强，而且修改起来很麻烦。当然也可以把layout分开，把逻辑代码全写在主界面的逻辑代码中，但是很明显可维护性相当差，这里通过ActivityGroup来解决这个问题

更多相关文章

1. Android对px和dip进行尺寸转换的方法
2. Android处理时间各种方法汇总
3. 【Android】GestureDetector 类的手势操作方法含义
4. Android手机客户端通过JSP实现与Tomcat服务器端通信（Msql数据库，Js
5. Android中关于空指针异常的解决办法
6. android各种界面跳转（调用系统联系人，通话记录，发短信，发邮件，google
7. android拨打电话崩溃6.0以上实时动态权限申请
8. 摘抄代码没测试 发起程序的返回顺序以及恩enter建取消输入法
9. Java的 ProcessBuilder & Process| 在android中用adb 执行一个li

随机推荐

1. android json解析
2. Android笔记：Android(安卓)UI学习 - 对话
3. Android串口开发，基于官方的android-seria
4. android9.0修复无锁屏时休眠后马上亮屏，ui
5. Android UI设计的三种常见布局（LinearLayo
6. Android OkHttp3 上传多张图片
7. Android屏幕旋转时Activity不重新调用onC
8. 原YUV格式的解析 Android NV21 视频采集
9. Android中TextView中加图片，超链接，一部分
10. Android 监听短信接收 获取发件号码、短