How to handle minimised app back press?

Question

I am not able to handle this below scenario. When I go to Activity B from Activity A and minimize the app and open from recent apps, Activity B will open and if I press back on Activity B, Activity A should resume, but in my case the app is closing.

Activity A

tool_setting.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent mIntent = new Intent(Activity_A.this,
                        Activity_B.class);
                startActivity(mIntent);
            }
        });

After clicking on button, opens Activity B. On B, I minimize and open app from recent apps, again on B if I press back button on toolbar, app closes instead of resuming Activity A.

Answer 1

You will have to take care of your Back Stack . Without knowing your code, you might be closing (calling finish() ) your Activity A.

Answer 2

The only reason that it will happen is if you are calling finish() after startActivity().

Something like:

private void startActivityB()
{
    Intent startActivityBIntent = new Intent(mContext, ActivityB.class);
    startActivity(startActivityBIntent);
    finish();
}