android - Can you draw multiple Bitmaps on a single View Method? -

currently trying make animation fish move around. have add 1 fish , made animate using canvas , bitmap. trying add background made in photoshop , whenever add in bitmap , draw canvas no background shows , fish starts lag across screen. wondering if needed make new view class , draw on different canvas or if use same one? thank help! here code in case guys interested:

public class fish extends view {     bitmap bitmap;     float x, y;      public fish(context context) {         super(context);         bitmap = bitmapfactory.decoderesource(getresources(), r.drawable.fish1);          x = 0;         y = 0;     }      @override     protected void ondraw(canvas canvas) {         super.ondraw(canvas);         canvas.drawbitmap(bitmap, x, y, null);          if (x < canvas.getwidth())         {             x += 7;         }else{             x = 0;         }         invalidate();              }      } 

you can draw many bitmaps like. each overlay prior. thus, draw background first, draw other images. sure in main images, use transparent pixels want background show through.

in code, don't call invalidate() - that's causes android call ondraw() , should called somewhere else when data has changed , needs redrawn.

you can this, theview view containing animation:

in activity, put code in oncreate()

myanimation(); 

then

private void myanimation() {   int millis = 50; // milliseconds between displaying frames   theview.postdelayed (new runnable ()   {     @override public void run()      {         theview.invalidate();         myanimation();  // can add conditional here stop animation     }   }, millis); }