重新创建主题更改活动

Question

What I Have

I have one main activity and one activity for settings. The user can move from the main activity to the settings. In the settings activity, the user can select a theme for the app. Now I have one main activity for the app.

When the user selects the theme, I have finished and restarted that activity to reflect changes immediately.

But when the user presses the back button he is taken to the main activity.

The Problem

The onResume() method is called and not the onCreate() . So the setTheme() method on the onCreate() doesn't also get called. So the theme change is not reflected here. So what should I do to bring the theme change in the main activity .

I basically need to ensure that the onCreate() of the main activity is always called when a theme change occurs.

Answer 1

in onResume() method call the recreate() recreate link

@Override
protected void onResume() {
// TODO Auto-generated method stub
    ...........
    recreate();
}

Answer 2

Try using a boolean :

public class MainActivity extends Activity {
    public boolean toBeRecreated;

    @Override
    public void onResume() {
        if (toBeRecreated) { recreate(); }
    }
}

Of course you need to set MainActivity.toBeRecreated = true when the user changes your theme.