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

on onCreate method of your activity write the following code.

getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);

Then override the onOptionsItem selected method of your activity as follows

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()){
        case android.R.id.home:
            finish();
    }
    return super.onOptionsItemSelected(item);
}

And you are good to go.