Question

I have multiple tabs and within them I have got an activity group for each. When I go from one tab to another then hit back I lose my intent data.

For example, I start activity 1, pass object 1 to activity 2 via the activitygroup I then go to activity 3 passing object 1, however when I go back to activity 2 onCreate is never called and I cannot set my intent data if I want to go back to Activity 3.

Answer 1

If you want to send data between activities you can use startActivitiForResult or you can do something like this :

Intent intent = new Intent(Activity.this, Activiti2.class);
intent.putExtra("key", "value");
startActivity(intent);

in Activity2 :

String getData = getIntent().getStringExtra("key","default value");
// or getParent().getIntent().getStringExtra("key","default value"); depending on your situation.

and if you want to send data to Activity from Activity2 you can do something like this :

 Intent intent = getParent().getIntent();
 intent.putExtra("key", 0); // default sorting
 getParent().setResult(RESULT_OK, intent);
 finish();