通知栏介绍

public class MainActivity extends Activity {

    private NotificationManager nm;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //[1]获取通知的管理者 
        nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        
    }

    //点击按钮发送通知
    public void click1(View v) {
        //链式调用  高版本的写法 
    /*     Notification noti = new Notification.Builder(this)
         .setContentTitle("我是大标题")
         .setContentText("我是标题的内容")
         .setSmallIcon(R.drawable.ic_launcher)
         .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher))
         .build();*/
 
        
        //兼容低版本的写法  用过时的方法
        Notification noti = new Notification(R.drawable.ic_launcher, "接收到了一条通知", System.currentTimeMillis());
        
        //实现呼吸灯 震动一下  
        noti.defaults = Notification.DEFAULT_ALL;
        
        //不删除通知 
        noti.flags = Notification.FLAG_NO_CLEAR;
        
        //创建意图对象
        Intent intent = new Intent();
        //实现打电话的逻辑 
        intent.setAction(Intent.ACTION_CALL);
        intent.setData(Uri.parse("tel:"+119));
        //需要添加打电话的权限 Task
        
        PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 1, intent, Intent.FLAG_ACTIVITY_NEW_TASK);
        noti.setLatestEventInfo(this, "小芳", "今天晚上7天酒店....", pendingIntent);

        //[2]发送通知 
        nm.notify(10, noti);
        
    }
    
    //点击按钮 关闭通知
    public void click2(View v) {
        //取消通知
        nm.cancel(10);
    }

}