android实现水波纹效果的例子

public class AnimActivity extends Activity {   @Override      public void onCreate(Bundle savedInstanceState){    super.onCreate(savedInstanceState);    setContentView(new PlasmaView(this));   }  }    class PlasmaView extends View implements View.OnTouchListener{    private Bitmap mBitmap;   long time;   long fps;        public PlasmaView(Context context) {          super(context);                  Bitmap bmp = BitmapFactory.decodeResource(this.getResources(),R.drawable.mm);          mBitmap = Bitmap.createBitmap(bmp.getWidth(), bmp.getHeight(), Bitmap.Config.RGB_565);          AnimRender.setBitmap(bmp);          this.setOnTouchListener(this);      }        @Override       protected void onDraw(Canvas canvas) {       long ct = System.currentTimeMillis();       if(ct - time > 1000){        Log.v("Fps:" + String.valueOf(fps));        time = ct;        fps = 0;       }       //fps++;       fps += 20;                 AnimRender.render(mBitmap);               canvas.drawBitmap(mBitmap, 0, 0, null);          postInvalidate();      }     @Override   public boolean onTouch(View v, MotionEvent event) {    // TODO Auto-generated method stub    AnimRender.drop((int)event.getX(), (int)event.getY(), 1200);    return false;   }  }    class AnimRender{   public static native void setBitmap(Bitmap src);      public static native void render(Bitmap dst);      public static native void drop(int x, int y, int height);           static {          System.loadLibrary("plasma");      }  }