android 接受系统锁屏广播，及高版本发送广播

protected BroadcastReceiver messageReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action.equals(MusicConstant.MEDIA_EXECUTE_CMD)) {
                int cmd = Integer.parseInt(intent.getStringExtra("cmd"));
                switch (cmd) {
                    case :
                        if (PCount %  == ) {
                            screenOff();
                        } else {
                            screenOn();
                        }
                        PCount++;
                        break;
                    case MusicConstant.cmd.VKEYCODE_MUTE:
                        // mute();
                        break;
                    case MusicConstant.cmd.VKEYCODE_UP://up

                        //  volumeUp();
                        break;
                    case MusicConstant.cmd.VKEYCODE_DOWN://down

                        // volumeDown();
                        break;
                    case MusicConstant.cmd.VKEYCODE_EXIT:
                        //finish();
                        break;
                    default:
                        break;

                }

            }else if(action.equals(MusicConstant.SET_VOLUME_ACTION)){
                app.baseOnKeyFlag = false;
              baseClickTime = System.currentTimeMillis();
                int oldVol = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
                setVolume(intent.getIntExtra("volume",oldVol));
                showBaseVolumeWindow();
            }else if(action.equals(Intent.ACTION_SCREEN_ON)){
                stopTimer();
            }else if(action.equals(Intent.ACTION_SCREEN_OFF)){
                startTimer();
            }
        }
    };

    private void initFilter() {
        IntentFilter filter = new IntentFilter();
        filter.addAction(MusicConstant.MEDIA_EXECUTE_CMD);
        filter.addAction(MusicConstant.SET_VOLUME_ACTION);
        filter.addAction(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        registerReceiver(messageReceiver, filter);
    }

1.高版本，用户发送自定义广播，接收不到信息

Intent intent = new Intent();
intent.setAction("demo.destroy");
intent.setComponent( new ComponentName( "luoy.com.servicebackstage" ,
        "luoy.com.servicebackstage.MyReceiver") );
sendBroadcast(intent);

setComponent的两个参数，第一个是包名，第二个是Receive的路径

2.系统广播接收不到

一些特殊的广播，必须动态注册，静态注册是不起效果的

类似，屏幕的锁屏和开屏

IntentFilter recevierFilter=new IntentFilter();
recevierFilter.addAction(Intent.ACTION_SCREEN_ON);
recevierFilter.addAction(Intent.ACTION_SCREEN_OFF);
MyReceiver receiver=new MyReceiver();
registerReceiver(receiver, recevierFilter);

https://blog.csdn.net/qq_30711091/article/details/86657268