Can I combine my code into some kind of “global activity”?

Question

Is there any global activity on Android such that I put my code in that one activity, and it affects all activities in my project? This occurs to me because the same code is

Answer 1

You can create a class that extends Activity and then extend the CustomActivity to all the Activity Class like this.

public abstract class CustomActivity extends Activity{

    public abstract void initComponents();  // you can create a abstract method
    public abstract void addListner();       // you can create a abstract method

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {

         if ((keyCode == KeyEvent.KEYCODE_BACK)) {
              // your stuff here....
            }
        return true;
    }
}

Now you can extend this class where you want to extend any class with Activity.