Do I have to clean up all dialogs 'show' by my activity

In my activity, I show a dialog under some condition like this:

public void showADialog(String title, String msg) {
    if (mIsActivityRunning) {
        new AlertDialog.Builder(this)
        .show();
  开发者_开发知识库  }
} 

My question is what do I need to do to ensure there is no resource leak? From the logcat, i see there is a case where it said a window is leaking or something like that.

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When the dialog box closes, how are you dismissing it? If you are using the hide() method, this won't actually dismiss the dialog.

EDIT: You need to dispose of the dialog box as the Activity is disposed of - see this question for more details