Call activity from Application

Question

I am trying to use Digits from Twitter. The AuthCallBack is not fired when used from activity and the recent document saying to use the AuthCallBack from the Application class.

Now I have the AuthCallBack working correctly and onSuccess I need to call a method from my MainActivity. How do I achieve it from the Application class. Kindly help. I have given the code below.

public class MyApplication extends Application {

    private AuthCallback authCallback;

    @Override
    public void onCreate() {
        super.onCreate();

        authCallback = new AuthCallback() {
            @Override
            public void success(DigitsSession session, String phoneNumber) {

                //call myFunction() from MainActivity here

            }

            @Override
            public void failure(DigitsException exception) {

            }
        };
    }

    public AuthCallback getAuthCallback(){
        return authCallback;
        }
}

Answer 1

You can use BroadcastManager to archive the same. Below is sample code you can use

From Application:

    @Override
    public void success(DigitsSession session, String phoneNumber) {
    Intent intent = new Intent(Constants.FILTER_LOGIN_SUCCESS);
    intent.putExtra(Constants.EXTRA_PHONE_NUMBER, phoneNumber);
    LocalBroadcastManager.getInstance(mInstance).sendBroadcast(intent);
}

Activity Class :

@Override
    protected void onResume() {
        super.onResume();
        LocalBroadcastManager.getInstance(SignUpActivity.this).registerReceiver(broadcastReceiver,
                new IntentFilter(Constants.FILTER_LOGIN_SUCCESS));
    }

@Override
protected void onDestroy() {
    super.onDestroy();
    LocalBroadcastManager.getInstance(SignUpActivity.this).unregisterReceiver(broadcastReceiver);
}

private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String phoneNumber = intent.getStringExtra(Constants.EXTRA_PHONE_NUMBER);
            navigateToAnotherActivty();
        }
    };