Skip going back to direct parent activity when pressed back

Question

I have got a small problem in an Android app I am working on :

There are 3 activities namely A , B , C and the invocation is in the following order : A -> B -> C.

Answer 1

You can start Activity C with startActivityForResult() and inside onActivityResult() finish Activity B.

To start Activity C,

Intent intent = new Intent(ActivityB.this, ActivityC.class);
startActivityForResult(intent, 123);

And override in Activity B

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if(requestCode == 123){
            if(resultCode == Activity.RESULT_OK){
                finish();
            }
        }
    }

And inside Activity C use setResult(Activity.RESULT_OK) before finish();

UPDATE:

Another way is to use FLAG_ACTIVITY_NEW_TASK and FLAG_ACTIVITY_CLEAR_TOP to start Activity A from Activity C.

Intent intent = new Intent(ActivitC.this, ActivityA.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);

One more way can be just finish() Activity B when you are starting Activity C. So, when you press back on Activity C it will directly move to Activity A as Activity B has already finished.