Android Notification基础使用(兼容 Android 8.0)

public class NotificationDemo extends AppCompatActivity implements View.OnClickListener {

    private Button btn_nts;
    private Button btn_ntv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_notification_demo);
        initView();

    }

    private void initView() {
        btn_nts = (Button) findViewById(R.id.btn_nts);

        btn_nts.setOnClickListener(this);
        btn_ntv = (Button) findViewById(R.id.btn_ntv);
        btn_ntv.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_nts:
                NotificationShow();
                break;
            case R.id.btn_ntv:
                NotificationVanish();
                break;
        }
    }

    private void NotificationShow() {
        //1.获取通知管理器类
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(NotificationDemo.this, "1");
      /**
         * 兼容Android版本8.0系统
         */
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            //第三个参数表示通知的重要程度，默认则只在通知栏闪烁一下
            NotificationChannel channel = new NotificationChannel("NotificationID", "NotificationName", NotificationManager.IMPORTANCE_DEFAULT);
            channel.enableLights(true);         // 开启指示灯，如果设备有的话
            channel.setLightColor(Color.RED);   // 设置指示灯颜色
            channel.setShowBadge(true);         // 检测是否显示角标
            // 注册通道
            notificationManager.createNotificationChannel(channel);
            builder.setChannelId("NotificationID");
        }
        //2.构建通知类
        builder.setSmallIcon(R.mipmap.ic_launcher);//设置图标
        builder.setContentTitle("微信");//标题
        builder.setContentText("您有一条未读消息!");//内容
        builder.setWhen(System.currentTimeMillis());    //时间
        //builder.setDefaults(Notification.DEFAULT_ALL);
        //SetDefaults 这个方法可选值如下：
       // Notification.DEFAULT_VIBRATE ：震动提示,Notification.DEFAULT_SOUND：提示音,Notification.DEFAULT_LIGHTS：三色灯,Notification.DEFAULT_ALL：以上三种全部
        //3.获取通知
        Notification notification = builder.build();
        //4.发送通知
        notificationManager.notify(1, notification);
    }

    private void NotificationVanish() {
        //取消通知
        NotificationManager service = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        service.cancel(1);
    }
}