广播接收器，用于零播和Oreo +设备不起作用

Question

public class ScreenReceiver extends BroadcastReceiver {

    private boolean screenOff;

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF))    {
            screenOff = true;
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            screenOff = false;
        }

    }


   <receiver
             android:name=".ScreenReceiver"
             android:enabled="true"
             android:exported="true">
             <intent-filter>
                <action android:name="android.intent.action.PHONE_STATE" />
                 <action android:name="android.intent.action.DREAMING_STARTED" />
                <action android:name="android.intent.action.DREAMING_STOPPED" />
                 <action android:name="android.intent.action.CLOSE_SYSTEM_DIALOGS" />
                 <action android:name="android.intent.action.SCREEN_ON" />
                 <action android:name="android.intent.action.SCREEN_OFF" />
                <action android:name="android.intent.action.LOCKED_BOOT_COMPLETED" />
                 <action android:name="android." />
             </intent-filter>
        </receiver>

Not getting any callback on naught and oreo devices,tried on marshmallow devices its working fine .but on oreo devices its not working and also for battery connected and network change receiver not working .

Answer 1

You can not register broadcast receiver in manifest.xml from Oreo. You can see Android 8.0 Behavior Changes

Apps cannot use their manifests to register for most implicit broadcasts (that is, broadcasts that are not targeted specifically at the app).

Solution

Register your receiver in your related Activity instead. Like this.

public class MainActivity extends AppCompatActivity {
    BroadcastReceiver receiver;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        filter.addAction(Intent.ACTION_SCREEN_ON);
        filter.addAction("android.intent.action.LOCKED_BOOT_COMPLETED");
        receiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                // todo
            }
        };
        registerReceiver(receiver, filter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (receiver != null)
            unregisterReceiver(receiver);
    }
}

You can add action as string same as manifest, if you don't find relevant constant string.