Android腾讯微博客户端开发一:在下方的Tab的实现
16lz
2021-01-23
红色的是res下drawable文件夹下的一个selector文件，内容是
Selector文件代码
<?xml version="1.0" encoding="UTF-8"?> <selector xmlns:android="[url=http://schemas.android.com/apk/res/android]http://schemas.android.com/apk/res/android[/url]"> <item android:state_focused="false" android:state_selected="false" android:state_pressed="false" android:drawable=<span style="background-color: #00ff00;">"@drawable/tab_timeline_normal" /></span> <item android:state_focused="false" android:state_selected="true" android:state_pressed="false" android:drawable=<span style="background-color: #00ff00;">"@drawable/tab_timeline_active" /></span> <item android:state_focused="true" android:state_selected="false" android:state_pressed="false" android:drawable=<span style="background-color: #00ff00;">"@drawable/tab_timeline_normal" /></span> <item android:state_focused="true" android:state_selected="true" android:state_pressed="false" android:drawable=<span style="background-color: #00ff00;">"@drawable/tab_timeline_active" /></span> <item android:state_pressed="true" android:drawable=<span style="background-color: #00ff00;">"@drawable/tab_timeline_normal" /></span> </selector> 也是你按下时，和不按时等有一个效果上的改变，具体的可以参看关于selector的知识。绿色的就是两张不同效果的图片
Mainactivity代码public class MainActivity extends TabActivity { private TabHost tabHost; private RadioGroup mainbtGroup; private static final String HOME = "主页"; private static final String REFER = "提及"; private static final String SECRET = "私信"; private static final String SEARCH = "搜索"; private static final String ATTENTIION = "关注"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.tabhost); tabHost = this.getTabHost(); View view1 = View.inflate(MainActivity.this, R.layout.tab, null); ((ImageView) view1.findViewById(R.id.tab_imageview_icon)).setImageResource(<span style="background-color: #ff0000;">R.drawable.tab_timeline_selector)</span>; ((TextView) view1.findViewById(R.id.tab_textview_title)).setText(HOME); TabHost.TabSpec spec1 = tabHost.newTabSpec(HOME) .setIndicator(view1) .setContent(new Intent(this, HomeTimeLineActivity.class)); tabHost.addTab(spec1); View view2 = View.inflate(MainActivity.this, R.layout.tab, null); ((ImageView) view2.findViewById(R.id.tab_imageview_icon)).setImageResource(<span style="background-color: #ff0000;">R.drawable.tab_atme_selector)</span>; ((TextView) view2.findViewById(R.id.tab_textview_title)).setText(REFER); TabHost.TabSpec spec2 = tabHost.newTabSpec(REFER) .setIndicator(view2) .setContent(new Intent(this, ReferActivity.class)); tabHost.addTab(spec2); View view3 = View.inflate(MainActivity.this, R.layout.tab, null); ((ImageView) view3.findViewById(R.id.tab_imageview_icon)).setImageResource(<span style="background-color: #ff0000;">R.drawable.tab_message_selector)</span>; ((TextView) view3.findViewById(R.id.tab_textview_title)).setText(SECRET); TabHost.TabSpec spec3 = tabHost.newTabSpec(SECRET) .setIndicator(view3) .setContent(new Intent(this, MessageActivity.class)); tabHost.addTab(spec3); View view4 = View.inflate(MainActivity.this, R.layout.tab, null); ((ImageView) view4.findViewById(R.id.tab_imageview_icon)).setImageResource(<span style="background-color: #ff0000;">R.drawable.tab_explore_selector</span>); ((TextView) view4.findViewById(R.id.tab_textview_title)).setText(SEARCH); TabHost.TabSpec spec4 = tabHost.newTabSpec(SEARCH) .setIndicator(view4) .setContent(new Intent(this, SearchActivity.class)); tabHost.addTab(spec4); View view5 = View.inflate(MainActivity.this, R.layout.tab, null); ((ImageView) view5.findViewById(R.id.tab_imageview_icon)).setImageResource(<span style="background-color: #ff0000;">R.drawable.tab_focus_selector</span>); ((TextView) view5.findViewById(R.id.tab_textview_title)).setText(ATTENTIION); TabHost.TabSpec spec5 = tabHost.newTabSpec(ATTENTIION) .setIndicator(view5) .setContent(new Intent(this, AttentionActivity.class)); tabHost.addTab(spec5); }
是一张.9.png格式的图片，这个很有用哟在android里，经常用来处理图片拉升的问题。左边和上面的小点表示要拉伸的地方，右边和下面的表示内容区。关于.9.png格式图片在android里面得更多应用看<a href="http://developer.android.com/guide/developing/tools/draw9patch.html">这里</a>
<?xml version="1.0" encoding="UTF-8"?> <TabHost android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="[url=http://schemas.android.com/apk/res/android]http://schemas.android.com/apk/res/android[/url]"> <RelativeLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent"
android:layout_height="fill_parent" /> <TabWidget android:id="@android:id/tabs" <span style="background-color: #ff0000;">
android:background="@drawable/tab_bkg"</span> android:fadingEdge="none" android:fadingEdgeLength="0.0px" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" /> </RelativeLayout> </TabHost>
Tabhost布局文件代码
android:layout_alignParentBottom="true" 把tab的五个按钮挨着父控件的底部，在android里面RelativeLayout很好用 Tab布局文件，就是你看到的那5个按钮的布局文件代码
<?xml version="1.0" encoding="UTF-8"?> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" xmlns:android="[url=http://schemas.android.com/apk/res/android]http://schemas.android.com/apk/res/android[/url]"> <ImageView android:id="@+id/tab_imageview_icon" android:layout_width="fill_parent" android:layout_height="32.0dip" android:scaleType="fitCenter" /> <TextView android:id="@+id/tab_textview_title" android:textSize="11.0sp" android:ellipsize="marquee" android:gravity="center" android:layout_width="fill_parent" android:layout_height="wrap_content" android:singleLine="true" android:marqueeRepeatLimit="1" /> </LinearLayout>
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