先看下效果图
TabWidget继承自TabActivity类,并实现setOnTabChangedListener的onTabChanged方法来监听Tab的改变:
布局文件:
<?xml version="1.0" encoding="utf-8"?> <TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" 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"> <TextView android:id="@+id/textview1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="this is a tab" /> <TextView android:id="@+id/textview2" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="this is another tab" /> <TextView android:id="@+id/textview3" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="this is a third tab" /> </FrameLayout> </LinearLayout> </TabHost>
源代码:
public class Android_actionBar extends TabActivity{
/**
* Action Bar学习
*/
//声明TabHost对象
TabHost mTabHost;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.actionbar);
//取得TabHost对象
mTabHost = getTabHost();
//新建一个newTabSpec(newTabSpec)
//设置其标签和图标(setIndicator)
//设置内容(setContent)
mTabHost.addTab(mTabHost.newTabSpec("tab_test1")
.setIndicator("通话记录").setContent(R.id.textview1));
mTabHost.addTab(mTabHost.newTabSpec("tab_test2")
.setIndicator("已接来电").setContent(R.id.textview2));
mTabHost.addTab(mTabHost.newTabSpec("tab_test3")
.setIndicator("未接来电").setContent(R.id.textview3));
//设置TabHost的背景颜色
//mTabHost.setBackgroundColor(Color.argb(150, 22, 70, 150));
//设置TabHost的背景图片资源
//mTabHost.setBackgroundResource(R.drawable.bg0);
//设置当前显示哪一个标签
mTabHost.setCurrentTab(0);
//标签切换事件处理,setOnTabChangedListener
mTabHost.setOnTabChangedListener(new OnTabChangeListener()
{
// TODO Auto-generated method stub
@Override
public void onTabChanged(String tabId)
{
Dialog dialog = new AlertDialog.Builder(Android_actionBar.this)
.setTitle("提示")
.setMessage("当前选中:"+tabId+"标签")
.setPositiveButton("确定",
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int whichButton)
{
dialog.cancel();
}
}).create();//创建按钮
dialog.show();
}
});
}
}