Notification 简单使用

Android Notification 简单使用，java代码如下：

public class MainActivity extends Activity implements View.OnClickListener {
    NotificationManager notificationManager;//通知控制类
    int Notification_ID = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        notificationManager= (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) {
        switch (v.getId()){
            case R.id.btn_send:
                sendNotification();
                break;
            case R.id.btn_cancle:
                notificationManager.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 pendingIntent=PendingIntent.getActivity(this, 0, intent, 0);
        Notification.Builder builder =new Notification.Builder(this);
        builder.setSmallIcon(R.drawable.ic_launcher);//图标
        builder.setTicker("hello");//手机状态栏的提示
        builder.setWhen(System.currentTimeMillis());//时间
        builder.setContentTitle("标题");
        builder.setContentText("内容");
        builder.setContentIntent(pendingIntent);//点击后的意图
//        builder.setDefaults(Notification.DEFAULT_SOUND);//提示音
//        builder.setDefaults(Notification.DEFAULT_VIBRATE);//指示灯
//        builder.setDefaults(Notification.DEFAULT_LIGHTS);//震动
        builder.setDefaults(Notification.DEFAULT_ALL);//包括以上三种
        Notification notification=builder.build();//4.1以上的
        notificationManager.notify(Notification_ID,notification);
    }
}

layout内容 为两个按钮