How to update the UI after the user has left the application in Android?

Question

Android

There is an IntentService that works in the background. After it completes, the result is sent as a BroadcastManager to the Main Activity, where it updates the UI of the Main activity.
But the problem is that when the user exits the application, the message (in the form of an Intent) is received by the BroadcastReceiver, but when the user returns to the application, he does not see this message, in the sense of the updated UI, because the onCreate method is launched , which represents the Activity in its original form, i.e. The UI is not updated even though the IntentService is working as it should.
How is it possible to save the current state of the Main Activity for the user and show the result after re-opening the application? MainActivity.java code:

public class MainActivity extends ActionBarActivity {
@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageFromCamera = (ImageView) findViewById(R.id.imageView1);
        ocrTextView = (EditText) findViewById(R.id.ocrText);

        //set an Intent Filter
        IntentFilter statusIntentFilter = new IntentFilter(ServiceBackground.Constants.BROADCAST_ACTION);
        receiver = new ResponseReceiver();

        LocalBroadcastManager.getInstance(this).registerReceiver(receiver,statusIntentFilter);
   }
   
private class ResponseReceiver extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction() != null && intent.getAction().equals(ServiceBackground.Constants.BROADCAST_ACTION)) {
                System.out.println(intent.getAction());
                final Bitmap imageRetrieved = intent.getParcelableExtra("bitmap");
                String responseRetrieved = intent.getStringExtra("response");
                imageFromCamera.setImageBitmap(imageRetrieved);
                ocrTextView.setText(responseRetrieved);

            }

    }
}

ServiceBackground.java code:

public class ServiceBackground extends IntentService {
    public ServiceBackground() {
        super("My_Worker_Thread");
    }

    @Override
    protected void onHandleIntent(Intent intent) {

        Toast.makeText(this, "Service started", Toast.LENGTH_LONG).show();

        Uri originalUri = intent.getData();

        String absolutePathToImage = UriToPathActivity.getRealPathFromUri(getApplicationContext(),id);
        final Bitmap bitmap = BitmapFactory.decodeFile(absolutePathToImage, bmOptions);
 

        Intent localIntent = new Intent(Constants.BROADCAST_ACTION);
        //bitmap responseReceivedполучены некоторой логикой
        localIntent.putExtra("bitmap", bitmap);
        localIntent.putExtra("response", responseReceived);

        LocalBroadcastManager.getInstance(this).sendBroadcast(localIntent);

    }
}

Answer 1

Store state in PreferenceManager, check state in onCreate and change UI accordingly