TabWidget/TabHost的两种使用方法

Android TabWidget/TabHost有两种使用方法：

第一种：使用系统自带写好的TabHost（及继承自TabActivity类）具体代码如下:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <LinearLayout android:id="@+id/tab1"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    androidrientation="vertical">
    <TextView android:id="@+id/TextView1"
      android:text="This is a tab1" android:layout_width="fill_parent"
      android:layout_height="wrap_content">
    </TextView>
  </LinearLayout>
  <LinearLayout android:id="@+id/tab2"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    androidrientation="vertical">
    <TextView android:id="@+id/TextView2"
      android:text="This is a tab2" android:layout_width="fill_parent"
      android:layout_height="wrap_content">
    </TextView>
  </LinearLayout>
  <LinearLayout android:id="@+id/tab3"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    androidrientation="vertical">
    <TextView android:id="@+id/TextView3"
      android:text="This is a tab3" android:layout_width="fill_parent"
      android:layout_height="wrap_content">
    </TextView>
  </LinearLayout>
</FrameLayout>

package com.Aina.Android;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.TabActivity;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.widget.TabHost;

public class Test_TabWidget extends TabActivity {
  /** Called when the activity is first created. */
  private TabHost tabHost;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // setContentView(R.layout.main);
    tabHost = this.getTabHost();
    LayoutInflater li = LayoutInflater.from(this);
    li.inflate(R.layout.main, tabHost.getTabContentView(), true);
    tabHost.addTab(tabHost.newTabSpec("Tab_1").setContent(R.id.tab1)
        .setIndicator("TAB1",
            this.getResources().getDrawable(R.drawable.img1)));
    tabHost.addTab(tabHost.newTabSpec("Tab_2").setContent(R.id.tab2)
        .setIndicator("TAB2",
            this.getResources().getDrawable(R.drawable.img2)));
    tabHost.addTab(tabHost.newTabSpec("Tab_3").setContent(R.id.tab3)
        .setIndicator("TAB3",
            this.getResources().getDrawable(R.drawable.img3)));
    tabHost.setCurrentTab(1);
//    tabHost.setBackgroundColor(Color.GRAY);
    tabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {

      public void onTabChanged(String tabId) {
        Dialog dialog = new AlertDialog.Builder(Test_TabWidget.this)
            .setTitle("提示").setMessage(
                "选中了" + tabId + "选项卡").setIcon(R.drawable.icon).setPositiveButton("确定", new DialogInterface.OnClickListener(){

                  public void onClick(DialogInterface dialog,
                      int which) {
                    // TODO Auto-generated method stub
                    
                  }
                  
                }).create();
        dialog.show();

      }

    });
  }
}

第二种：就是定义我们自己的tabHost：不用继承TabActivity，具体代码如下:

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/TabHost01" android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <LinearLayout android:layout_width="fill_parent"
    android:orientation="vertical" android:layout_height="fill_parent">
    <TabWidget android:id="@android:id/tabs"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content" />
    <FrameLayout android:id="@android:id/tabcontent"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent">
      <LinearLayout android:id="@+id/LinearLayout1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">
        <TextView android:text="one"
          android:id="@+id/TextView01" android:layout_width="wrap_content"
          android:layout_height="wrap_content">
        </TextView>
      </LinearLayout>
      <LinearLayout android:id="@+id/LinearLayout2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <TextView android:text="two"
          android:id="@+id/TextView02" android:layout_width="fill_parent"
          android:layout_height="wrap_content">
        </TextView>
      </LinearLayout>
      <LinearLayout android:id="@+id/LinearLayout3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <TextView android:text="three"
          android:id="@+id/TextView03" android:layout_width="fill_parent"
          android:layout_height="wrap_content">
        </TextView>
      </LinearLayout>
    </FrameLayout>
  </LinearLayout>
</TabHost>

package com.Aina.Android;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.widget.TabHost;

public class Test_TabHost extends Activity {
  /** Called when the activity is first created. */
  private TabHost tabHost;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    try{
      tabHost = (TabHost) this.findViewById(R.id.TabHost01);
      tabHost.setup();
      
      tabHost.addTab(tabHost.newTabSpec("tab_1")
          .setContent(R.id.LinearLayout1)
          .setIndicator("TAB1",this.getResources().getDrawable(R.drawable.img1)));
      tabHost.addTab(tabHost.newTabSpec("tab_2")
          .setContent(R.id.LinearLayout2).setIndicator("TAB2",
              this.getResources().getDrawable(R.drawable.img2)));
      tabHost.addTab(tabHost.newTabSpec("tab_3")
          .setContent(R.id.LinearLayout3).setIndicator("TAB3",
              this.getResources().getDrawable(R.drawable.img3)));
      tabHost.setCurrentTab(1);
    }catch(Exception ex){
      ex.printStackTrace();
      Log.d("EXCEPTION", ex.getMessage());
    }

  }
}

注意：第二种方法时布局文件中的TabWidget的id必须定义为：android:id="@android:id/tabs"，FrameLayout的id必须定义为：android:id="@android:id/tabcontent" 其它控件没有限制，否则报错。