Android UP button goes to mainActivity instead of current

Question

I have 3 activities:

• MainActivity (start activity with grid view)
• FragmentActivity (full screen image slider accessed from grid view)
• InfoActivity (blank activity opened from menu in either Main or Fragment)

When I go from MainActivity to InfoActivity:

startActivity(new Intent(MainActivity.this, InfoActivity.class));

and press the "up" button I get back to main activity.

When I go from FragmentActivity to InfoActivity

 startActivity(new Intent(this, InfoActivity.class));

and press the "up" I STILL get back to MainActivity.

I know it's because my MainActivity is the parent of Info.

But how do I make the "up" behave like the "back" button, so that I can go from InfoActivity to FragmentActivity?

Any help will be much appreciated!

Answer 1

You have to override onOptionsItemSelected in the InfoActivity class to intercept the "up" button and call onBackPressed from there. Like so:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if(item != null && item.getItemId() == android.R.id.home) {
        onBackPressed();
        return true;
    }
    return super.onOptionsItemSelected(item);
}