Display back button of action bar is not going bac

Question

I am developing an Android app. I am using ActionBar with AppCompactActivity. In my app, I add back button to action bar. But when I click on it, it is not going back to the previous activity. For example, I start activity 2 from activity 1. Activity 2 contains action bar with back button. But when I click on action bar back button of activity 2, it is not going back to activity 1.

This is how I set action bar for activity 2:

public class EditProfileActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.edit_profile);
        Toolbar toolbar = (Toolbar)findViewById(R.id.profile_action_toolbar);
        setSupportActionBar(toolbar);
        setTitle("Edit Profile");
        ActionBar actionBar= getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);
    }
}

This is how I started activity 2 from activity 1:

Intent i = new Intent(MainActivity.this,SecondActivity.class);
                    startActivity(i);

It is not going back when I click this button

Why it is not going back?

Answer 1

Here you have 2 options:

a) provide a parentActivityName to your SecondActivity tag in AndroidManifest.xml like this:

 <activity
    ...
    android:name=".SecondActivity"
    android:parentActivityName=".MainActivity" >

b) override onOptionsItemSelected in SecondActivity like this:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    // Respond to the action bar's Up/Home button
    case android.R.id.home:
        onBackPressed();
        return true;
    }
    return super.onOptionsItemSelected(item);
}

I would suggest reading this guide for more information.