TabHost两种实现方式

第一种：继承TabActivity，从TabActivity中用getTabHost()方法获取TabHost。只要定义具体Tab内容布局就行了.

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/FrameLayout01"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<TextView
android:id="@+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="所有通话记录"></TextView>

<TextView
android:id="@+id/TextView02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="已接来电"></TextView>

<TextView
android:id="@+id/TextView03"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="未接来电"></TextView>

</FrameLayout>

package com.example.testtabhost;

import android.app.TabActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.widget.TabHost;
import android.widget.Toast;
import android.widget.TabHost.OnTabChangeListener;

public class MainActivity extends TabActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

TabHost th = getTabHost();
//声明TabHost，然后用LayoutInflater过滤出布局来，给TabHost加上含有Tab页面的FrameLayout
//from(this)从这个TabActivity获取LayoutInflater　　
//R.layout.main 存放Tab布局
//通过TabHost获得存放Tab标签页内容的FrameLayout　　
//是否将inflate 拴系到根布局元素上
LayoutInflater.from(this).inflate(R.layout.activity_main, th.getTabContentView(), true);
//通过TabHost获得存放Tab标签页内容的FrameLayout，
//newTabSpecd的作用是获取一个新的 TabHost.TabSpec，并关联到当前 TabHost
//setIndicator的作用是指定标签和图标作为选项卡的指示符.
//setContent的作用是指定用于显示选项卡内容的视图 ID.
th.addTab(th.newTabSpec("all").setIndicator("所有通话记录", getResources().getDrawable(R.drawable.ic_launcher)).setContent(R.id.TextView01));
th.addTab(th.newTabSpec("ok").setIndicator("已接来电",getResources().getDrawable(R.drawable.ic_launcher)).setContent(R.id.TextView02));
th.addTab(th.newTabSpec("cancel").setIndicator("未接来电",getResources().getDrawable(R.drawable.ic_launcher)).setContent(R.id.TextView03));
//setOnTabChangeListener的作业是注册一个回调函数，当任何一个选项卡的选中状态发生改变时调用.
th.setOnTabChangedListener(
new OnTabChangeListener() {
@Override
public void onTabChanged(String tabId) {
Toast.makeText(MainActivity.this, tabId, Toast.LENGTH_LONG).show();
}
}
);
}
}

第二种：不用继承TabActivity，在布局文件中定义TabHost即可，但是TabWidget的id必须是

@android:id/tabs，FrameLayout的id必须是@android:id/tabcontent。TabHost的id可以自定义.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/hometabs"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TabHost android:id="@+id/tabhost"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<TabWidget android:id="@android:id/tabs"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</TabWidget>

<FrameLayout android:id="@android:id/tabcontent"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView android:id="@+id/view1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
<TextView android:id="@+id/view2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
<TextView android:id="@+id/view3"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</FrameLayout>

</LinearLayout>
</TabHost>
</LinearLayout>

package com.example.testtabhost2;

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

public class MainActivity extends Activity {

private static final String TAG = "MainActivity";

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

TabHost tabHost = (TabHost) findViewById(R.id.tabhost);
tabHost.setup();
TabWidget tabWidget = tabHost.getTabWidget();

tabHost.addTab(tabHost.newTabSpec("tab1")
.setIndicator("tab1", getResources().getDrawable(R.drawable.ic_launcher))
.setContent(R.id.view1));

tabHost.addTab(tabHost.newTabSpec("tab3")
.setIndicator("tab3")
.setContent(R.id.view3));

tabHost.addTab(tabHost.newTabSpec("tab2")
.setIndicator("tab2")
.setContent(R.id.view2));

final int tabs = tabWidget.getChildCount();
Log.i(TAG, "***tabWidget.getChildCount() : " + tabs);

final int tabWidth = 90;
final int tabHeight = 45;

for (int i = 0; i < tabs; i++) {
/*	final View view = tabWidget.getChildAt(i);
view.getLayoutParams().width = tabWidth;
view.getLayoutParams().height = tabHeight;
final TextView tv = (TextView) view.findViewById(android.R.id.title);
tv.setTextColor(this.getResources().getColorStateList(android.R.color.black));
MarginLayoutParams tvMLP = (MarginLayoutParams)tv.getLayoutParams();
tvMLP.bottomMargin = 8;*/
}
}

}