getSupportActionBar().setDisplayHomeAsUpEnabled(true);getSupportActionBar().setDisplayShowHomeEnabled(true);@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// this takes the user 'back', as if they pressed the left-facing
triangle icon on the main android toolbar.
// if this doesn't work as desired, another possibility is to call
stopActivityTask(); // finish() here.
getActivity().onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);setSupportActionBar(toolbar);