title: Is there anyway to inject key event to other apps without root privilege?
body: <p>I try to find a way to inject keyEvent into other apps. However, the solutions usually involved with root privilege or get system signature.</p>
  
  <p>Is there anyway to inject the input event into other apps without root the device? I think, the platform key is usually hold by the device provider who create the ROM. So it is not a valid way either.</p>
  
  <p>I knew it can be down, for example the "Button savior non root".</p>
  
  <p>Does anyone have any experience in this?</p>