title: Hook Android Sytem API related to Text Output
body: <p>In Windows Programming, if you hook <code>TextOut，ExtTextOut，DrawText，DrawTextEx，PolyTextOut，TabbedTextOut</code> etc, you can almost catch the ouput of any software.</p>
  
  <p>Are there similiar system apis you can hook on Android?</p>
  
  <p>I want to capture the output of some apps.</p>
  
  <p>PS: I have root permission!  I have got the target android app. </p>
  
  <p>I can even install it on an android emulator on Windows.</p>