2.4.7 选项卡的功能和用法

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/layoutMain"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity" >    <TabHost        android:id="@android:id/tabhost"        android:layout_width="match_parent"        android:layout_height="match_parent" >        <LinearLayout            android:layout_width="match_parent"            android:layout_height="match_parent"            android:orientation="vertical" >            <TabWidget                android:id="@android:id/tabs"                android:layout_width="match_parent"                android:layout_height="wrap_content" >            </TabWidget>            <FrameLayout                android:id="@android:id/tabcontent"                android:layout_width="match_parent"                android:layout_height="match_parent" >                <LinearLayout                    android:id="@+id/tab1"                    android:layout_width="match_parent"                    android:layout_height="match_parent"                     android:orientation="vertical"                    android:gravity="top|center">                    <TextView                        android:id="@+id/textView2"                        android:layout_width="wrap_content"                        android:layout_height="wrap_content"                        android:text="已接电话1" />                    <TextView                        android:id="@+id/textView3"                        android:layout_width="wrap_content"                        android:layout_height="wrap_content"                        android:text="已接电话2" />                </LinearLayout>                <LinearLayout                    android:id="@+id/tab2"                    android:layout_width="match_parent"                    android:layout_height="match_parent"                     android:orientation="vertical"                    android:gravity="top|center">                    <TextView                        android:id="@+id/textView4"                        android:layout_width="wrap_content"                        android:layout_height="wrap_content"                        android:text="未接电话1" />                    <TextView                        android:id="@+id/textView6"                        android:layout_width="wrap_content"                        android:layout_height="wrap_content"                        android:text="未接电话2" />                </LinearLayout>                <LinearLayout                    android:id="@+id/tab3"                    android:layout_width="match_parent"                    android:layout_height="match_parent" >                    <TextView                        android:id="@+id/textView1"                        android:layout_width="wrap_content"                        android:layout_height="wrap_content"                        android:text="TextView" />                    <TextView                        android:id="@+id/textView5"                        android:layout_width="wrap_content"                        android:layout_height="wrap_content"                        android:text="TextView" />                </LinearLayout>            </FrameLayout>        </LinearLayout>    </TabHost></LinearLayout>

package com.moon.hello2;import java.util.Calendar;import android.R.anim;import android.R.integer;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;import android.widget.Button;import android.widget.DatePicker;import android.widget.ImageView;import android.widget.ProgressBar;import android.widget.RatingBar;import android.widget.RatingBar.OnRatingBarChangeListener;import android.widget.SeekBar;import android.widget.DatePicker.OnDateChangedListener;import android.widget.SeekBar.OnSeekBarChangeListener;import android.widget.TabHost;import android.widget.TextView;import android.widget.TimePicker;import android.widget.TimePicker.OnTimeChangedListener;public class MainActivity extends Activity {    private int status = 0;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        this.setContentView(R.layout.activity_main);        TabHost tabHost = (TabHost) findViewById(android.R.id.tabhost);        tabHost.setup();        tabHost.addTab(tabHost.newTabSpec("tab1").setIndicator("已接电话")                .setContent(R.id.tab1));        tabHost.addTab(tabHost.newTabSpec("tab2").setIndicator("未接电话")                .setContent(R.id.tab2));        tabHost.addTab(tabHost.newTabSpec("tab3").setIndicator("备用")                .setContent(R.id.tab3));    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.main, menu);        return true;    }}

需要注意的是对高级别的API, 在获取tabhost后还需要调用.setup()方法装载一下wight, 否则在tabspec.setcontent时会产生空指针异常

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