title: Enable taking screenshot of a App after disabled using FLAG_SECURE
body: <p>Using the code below I prevent users taking screenshots of my app. I want to implement "enable screenshot button". Is it possible? Which concept should I use?</p>
  
  <pre><code> public class FlagSecureTestActivity extends Activity {
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
  
            getWindow().setFlags(LayoutParams.FLAG_SECURE,
                       LayoutParams.FLAG_SECURE);
            setContentView(R.layout.main);
    }
   } 
  </code></pre>