Question

我的项目中有两个位图我需要的是我需要将这两个位图组合并将这些位图组合成一个图像我将显示我的代码

public class FotosurpriseActivity extends Activity {
/** Called when the activity is first created. */
Bitmap overlay;      
Paint pTouch;
int X = -100;
int Y = -100;
Canvas c2;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.android);
    Bitmap mBitmapover = BitmapFactory.decodeResource(getResources(), R.drawable.ss);
    overlay = BitmapFactory.decodeResource(getResources(),R.drawable.ss).copy(Config.ARGB_8888, true);  
    c2 = new Canvas(overlay);

    pTouch = new Paint(Paint.ANTI_ALIAS_FLAG);         
  //  pTouch.setXfermode(new PorterDuffXfermode(Mode.TARGET); 
    pTouch.setColor(Color.TRANSPARENT);
    pTouch.setMaskFilter(new BlurMaskFilter(15, Blur.NORMAL));
    setContentView(new BitMapView(this, mBitmap,mBitmapover));
}

class BitMapView extends View {
    Bitmap mBitmap = null;
    Bitmap mBitmapover = null;

    public BitMapView(Context context, Bitmap bm, Bitmap bmover) {
    super(context);
    mBitmap = bm;
    mBitmapover = bmover;
    }
     @Override
     public boolean onTouchEvent(MotionEvent ev) {

         switch (ev.getAction()) {

             case MotionEvent.ACTION_DOWN: {

                 X = (int) ev.getX();
                 Y = (int) ev.getY();
                 invalidate();

                 break;
             }

             case MotionEvent.ACTION_MOVE: {

                     X = (int) ev.getX();
                     Y = (int) ev.getY();
                     invalidate();
                     break;

             }           

             case MotionEvent.ACTION_UP:

                 break;

         }
         return true;
     }


    @Override
    protected void onDraw(Canvas canvas) {
    // called when view is drawn
    Paint paint = new Paint();
    paint.setFilterBitmap(true);
    // The image will be scaled so it will fill the width, and the
    // height will preserve the imageâ€™s aspect ration
/*  double aspectRatio = ((double) mBitmap.getWidth()) / mBitmap.getHeight();
    Rect dest = new Rect(0, 0, this.getWidth(),(int) (this.getHeight() / aspectRatio));
    double aspectRatio2 = ((double) mBitmapover.getWidth()) / mBitmapover.getHeight();
    Rect dest2 = new Rect(0, 0, this.getWidth(),(int) (this.getHeight() / aspectRatio2));
    canvas.drawBitmap(mBitmap, null, dest, paint);
    canvas.drawBitmap(mBitmapover, null, dest2, paint);                    */

    //draw background
    canvas.drawBitmap(mBitmap, 0, 0, null);
    //copy the default overlay into temporary overlay and punch a hole in it                          
    c2.drawBitmap(mBitmapover, 0, 0, null); //exclude this line to show all as you draw
    c2.drawCircle(X, Y, 80, pTouch);
    //draw the overlay over the background  
    canvas.drawBitmap(overlay, 0, 0, null);
    }
}

 }

我怎样才能实现这一目标？

Answer 1

onDraw函数绘制到视图。您实际上根本不需要这样做。您可以在位图所在的内存中完成所有操作。您也可以在C2上绘制其他位图。您无需在onDraw（）中在画布上绘制任何内容，只需将其绘制到屏幕上即可。

结合两个位图并在android中保存为jpg格式？

1 个答案: