Question

public class TestActivity extends Activity {

    public static TestActivity mTestActivity;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mTestActivity = this;
    }

    @Override
    protected void onDestroy() {
        mTestActivity = null;
        super.onDestroy();
    }

}

Can I ask a very rookie question?
Does static link to Activity ALWAYS leads to memory leak? Even if I ‘null’ it on destroy?

EDIT:
If there is a memory leak even though you ‘null’ it on destroy, could you explain why?
I have some years of Java experience but I cannot understand why ‘null’ on destroy does not free the memory.

Answer 1

If, you null it on destroy there is not point in keeping it static. As for the leak, yes, I think you will (if you change activities). It would be easier to just keep a (non-static) reference to the application.