How to start an Activity from Service Android 11

Question

how can i open an Activity in the Background from my Service?

The App is running in background and an Intent Brodcast that triggers the start of an Activity within my app.

I tried it on an Android 8.1 Device and it works fine but on the Andrid 11 Device it wont work.

 public void StartRead(){
        Intent i = new Intent(this, TestActivity.class);
        startActivity(i);
    }

private final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
             if(intent.getAction().equals(VariableStorage.getInstance().BRODCAST_READ)){
                 //Start RFID Activity
                    StartRead();
            }else if(intent.getAction().equals(VariableStorage.getInstance().BRODCAST_DECODEVDA)){
                //Decode VDA55
             }
        }
    };

AndroidManifest.xml :

 <activity
            android:name=".TestActivity"
            android:exported="true"
            android:enabled="true"/>

My Service is a normal ForegroundService.

Answer 1

how can i open an Activity in the Background from my Service?

You can't.

The reason and your options is explained in the documentation: