Control the back “button” in android

Question

I want to get the Text data value from Sub-Activity back. And everything is ok. But when the Sub-activity was opened, then I just click back \"button\" on the phone, it thro

Answer 1

Try putting in some logging into the onActivityResult(...) method of your main activity. The "back" button from the subactivity may be giving you a result code of RESULT_CANCELED, and the intent can be null in that case. So you'll get an NPE at

Bundle bundle = intent.getExtras();