Question

I have three activity, eg. A, B and C. A start B, and B start C. I will remove B from the back stack in C. Then I need to pass some data from C to A before I finish C. My question is how to pass data from C to A ?

Answer 1

If you want to pass some data from C to A before finishing C activity then you can use broadcast receiver in your A activity and can send broadcast from C to A directly.

Write the below code before starting activity B from A. This code will receive data from activity C.

BroadcastReceiver brd_receiver = new BroadcastReceiver() {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals("receive data from C")) {
            // DO YOUR WORK HERE.
        }

    }
};

registerReceiver(brd_receiver, new IntentFilter("receive data from C"));

Write this code to send data from activity C to activity A.

Intent intent = new Intent();
        intent.setAction("receive data from C");
        intent.putExtra(name, value); //SAVE YOU DATA INTO INTENT.
        sendBroadcast(intent);

Hope it will help you if it is not working then tell me the problem you are facing. I think it should work.