状态栏提示Notification

当有未接电话或者短信时，在手机顶部状态栏就会出现一个小图标，提示用户没有处理的快讯，android提供了NotificationManager来管理状态栏信息，提供Notification处理这些快讯信息
示例
main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<TextView android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="@string/hello" />
	<Button android:text="Button01" android:id="@+id/Button01"
		android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>	
</LinearLayout>

main2.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<TextView android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="多谢使用" />
</LinearLayout>

Activity.java

public class Test_Notification extends Activity {  
    /** Called when the activity is first created. */  
    private Button btn1;  
    private Notification notification;  
    private NotificationManager notificationManager;  
    private Intent intent;  
    private PendingIntent pendIntent;  
  
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        btn1 = (Button) this.findViewById(R.id.Button01);  
        notificationManager = (NotificationManager) this  
                .getSystemService(NOTIFICATION_SERVICE);// 获取系统服务（消息管理）  
        // 点击通知时转移内容  
        intent = new Intent(this, Activity2.class);  
        // 设置点击通知时显示内容的类  
       // 和Intent不同，构造pendIntent是Nofication.setLastestEventInfo参数需要
        pendIntent = PendingIntent.getActivity(this, 0, intent, 0);  
        notification = new Notification();  
        btn1.setOnClickListener(new OnClickListener() {  
  
            @Override  
            public void onClick(View v) {  
                // TODO Auto-generated method stub  
                notification.icon = R.drawable.img1;// 设置在状态栏显示的图标  
                notification.tickerText = "Button1通知内容.......";//设置在状态栏显示的内容  
                notification.defaults = Notification.DEFAULT_SOUND;// 默认的声音  
                // 设置通知显示的参数  
                notification.setLatestEventInfo(Test_Notification.this,  
                        "Button1", "Button1通知", pendIntent);  
                notificationManager.notify(0, notification);// 执行通知.  
            }  
  
        });  
    }  
}