title: How to increase and decrease music player volume when sliding finger up on screen?
body: <p>I am new to android development and currently I'm developing simple music player app. Here question is that how to <code>increase</code> and <code>decrease</code> music player <code>volume</code> when sliding finger up on my main music player activity.</p>
  
  <p>If anyone know the logic of these please help me for this.</p>
  
  <p>thanks in advance... </p>
  
  <p>this is my music player main Activity</p>