title: android how to disable changing through apps
body: <p>currently I am working on a parental control app and I want the child keep from removing the app. For this, I want to lock the device when the child wants to disable my app from device admins (in settings/security) and show an activity to enter the password. But after the activity is shown, I can still use the device by changing through apps (by double square button on the device, I don't know its name).</p>
  
  <p>How can I lock the device such that the user only can see my password asking activity &amp; can't do anything but either enter the password or cancel?</p>