public class ActivityMainNotification extends Activity {
 //为Notification添加一个标识的ID.
 private static int NOTIFICATIONS_ID = 1;//R.layout.activity_notification;
 //为Notification添加一个管理的对象NotificationManager
 private NotificationManager mNotificationManager;

@Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_notification);

Button button;
    //使用NotificationManager的getSystemService(NOTIFICATION_SERVICE)来申明(Notification)
  mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

button = (Button) findViewById(R.id.sun_1);
  button.setOnClickListener(new Button.OnClickListener() {
   public void onClick(View v) {
    //这里使用了自定的方法，为了实现Notification.
    setWeather("晴空万里", "天气预报", "晴空万里", R.drawable.sun);
   }
  });

button = (Button) findViewById(R.id.cloudy_1);
  button.setOnClickListener(new Button.OnClickListener() {
   public void onClick(View v) {
    setWeather("阴云密布", "天气预报", "阴云密布", R.drawable.cloudy);
   }
  });

button = (Button) findViewById(R.id.rain_1);
  button.setOnClickListener(new Button.OnClickListener() {
   public void onClick(View v) {
    setWeather("大雨连绵", "天气预报", "大雨连绵", R.drawable.rain);
   }
  });

button = (Button) findViewById(R.id.defaultSound);
  button.setOnClickListener(new Button.OnClickListener() {
   public void onClick(View v) {
    setDefault(Notification.DEFAULT_SOUND);
   }
  });

button = (Button) findViewById(R.id.defaultVibrate);
  button.setOnClickListener(new Button.OnClickListener() {
   public void onClick(View v) {
    setDefault(Notification.DEFAULT_VIBRATE);
   }
  });

button = (Button) findViewById(R.id.defaultAll);
  button.setOnClickListener(new Button.OnClickListener() {
   public void onClick(View v) {
    setDefault(Notification.DEFAULT_ALL);
   }
  });

button = (Button) findViewById(R.id.clear);
  button.setOnClickListener(new Button.OnClickListener() {
   public void onClick(View v) {
    mNotificationManager.cancel(NOTIFICATIONS_ID);
   }
  });

}

private void setWeather(String tickerText, String title, String content,
   int drawable) {
         /*第一个参数要显示的图片id
          * 第二个参数为显示的文本
          * 第三个参数为Notification显示的时间，一般为立即显示
          */
  Notification notification = new Notification(drawable, tickerText,
    System.currentTimeMillis());
   //创建一个动态的intent，为了识别点击的事件处理
  //第一个参数是上下文
  //第二个参数是事件的序列参数
  //第三个参数是intent事件响应
  //第四个参数是为intent做序列标记
  PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
    new Intent(this, ActivityMain.class), 0);
  //setLatestEventInfo的第一个参数为上下文
  //第二个参数为notification标题
  //第三个参数为notification内容
  //第四个参数为intent处理
  notification.setLatestEventInfo(this, title, content, contentIntent);
  //通过NotificationManager的对象来管理notification
  mNotificationManager.notify(NOTIFICATIONS_ID, notification);
 }

private void setDefault(int defaults) {

PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
    new Intent(this, ActivityMain.class), 0);

String title = "天气预报";
  String content = "晴空万里";

final Notification notification = new Notification(R.drawable.sun,
    content, System.currentTimeMillis());
       
  notification.setLatestEventInfo(this, title, content, contentIntent);
  //为Notification设置表现形式
  notification.defaults = defaults;

mNotificationManager.notify(NOTIFICATIONS_ID, notification);
 }
}