title: Android scale zoom zoomout bitmap on canvas
body: <p>I need to add following features in my app</p>
  
  <p>I have to display Bitmap into Canvas</p>
  
  <p>Then user can zoom in and zoom out bitmap into Canvas</p>
  
  <p>How to make it possible? <strong>I only need it in Canvas not in ImageView</strong></p>
  
  <p>All answers are not much helpful to me.. so i think to update my Question</p>
  
  <p>Basically i need a simple 2 button and a canvas...</p>
  
  <p>on first button click the image on canvas can rotate/zoom in and zoomout and on clicking second button it must display zoomed or zoomed out image that was created by user and after that the user must not able to zoom it or zoomout that canvas</p>