实现通知栏Notification

课程Demo

public class MainActivity extends Activity implements OnClickListener{
   NotificationManager manager;//通知控制类
   int notification_ID;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
      findViewById(R.id.btn_send).setOnClickListener(this);
      findViewById(R.id.btn_cancle).setOnClickListener(this);
   }
   @Override
   public void onClick(View v) {
      // TODO Auto-generated method stub
      switch (v.getId()) {
      case R.id.btn_send:
         sendNotification();
         break;
      case R.id.btn_cancle:
         manager.cancel(notification_ID);
         break;
      }
   }
   /**
    * 构造notification并发送到通知栏
    */
   private void sendNotification(){
      Intent intent = new Intent(this,MainActivity.class);
      PendingIntent pintent = PendingIntent.getActivity(this, 0, intent, 0);
      Builder builder = new Notification.Builder(this);
      builder.setSmallIcon(R.drawable.ic_launcher);//设置图标
      builder.setTicker("hello");//手机状态栏的提示；
      builder.setWhen(System.currentTimeMillis());//设置时间
      builder.setContentTitle("通知栏通知");//设置标题
      builder.setContentText("我来自NotificationDemo");//设置通知内容
      builder.setContentIntent(pintent);//点击后的意图
//    builder.setDefaults(Notification.DEFAULT_SOUND);//设置提示声音
//    builder.setDefaults(Notification.DEFAULT_LIGHTS);//设置指示灯
//    builder.setDefaults(Notification.DEFAULT_VIBRATE);//设置震动
      builder.setDefaults(Notification.DEFAULT_ALL);//设置以上三个（注意要打开手机权限）
      Notification notification = builder.build();//4.1以上
      //builder.getNotification();
      manager.notify(notification_ID, notification);
   }
}