How to close activity and go back to previous activity in android

Question

I have a main activity, that when I click on a button, starts a new activity, i used the following code to do so:

Intent intent = new Intent(this, SettingsAc         


        

Answer 1

 @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        if ( id == android.R.id.home ) {
            finish();
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

Try this it works both on toolbar back button as hardware back button.