广播接收器在模拟器上运行，但不能在真实设备上运行（Android Oreo）

Question

广播接收机，当我杀死我的应用程序时，它可以在后台正常工作。但是我安装了我的真实设备，当我杀死应用程序时不是。

> Java Code

    public class BackgroundService extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context,"Send Message",Toast.LENGTH_LONG).show();
    }
}

> MainActivity
     BackgroundService backgroundService;
      @Override
    protected void onStart() {
        super.onStart();
        IntentFilter intentFilter = new IntentFilter(WifiManager.WIFI_STATE_CHANGED_ACTION);
        registerReceiver(backgroundService,intentFilter);
    }


> Manifests 



<uses-permission android:name="android.permission.RECEIVE_SMS"/>
    <uses-permission android:name="android.permission.WAKE_LOCK"/>
    <uses-permission android:name="android.permission.SEND_SMS"/>
    <uses-permission android:name="android.permission.READ_SMS"/>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>

    <receiver android:name=".BackgroundService">
        <intent-filter android:priority="999">
            <action android:name="android.intent.action.SCREEN_ON"/>
            <action android:name="android.provider.Telephony.SMS_RECEIVED"/>
        </intent-filter>
    </receiver>

Answer 1

[从android 8开始，如果您有任何隐式广播，则必须将其注册到不在清单中的活动中您的情况

<action android:name="android.intent.action.SCREEN_ON"/> <action android:name="android.provider.Telephony.SMS_RECEIVED"/>
```  seems to be implicit broadcast. Try registering them in your activity class using **intent.addAction(Your Action)**

Also unregister you receiver in **onStop**  by 
calling **unregisterReceiver(Receiver instance)**