Android SurfaceView上的缩放效果

Question

我正在开发赛车游戏.我能够移动,停止,加速.但是我希望当我按屏幕然后car(bitmap of car image)应该看起来,它已经跳到它的位置.我正在使用surfaceview绘制视图

我不想使用3D openGL.任何帮助深表感谢

Answer 1

最后我用过.在触摸事件中,我创建一个更大的位图并在同一个地方绘制它.所以它会给出缩放效果

Bitmap bitmapToZoom;  // Create a Bitmap
// Now zoom it 
bitmapToZoom=Bitmap.createScaledBitmap(bitmapToZoom, bitmapToZoom.getWidth()+30,bitmapToZoom.getHeight()+30, null); 
//now draw it again
canvas.drawBitmap(bitmapToZoom, 0,0,null);

所以现在终于,触摸代码上的缩放演员会是这样的.类名ZoomonTouc.java

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.RectF;
import android.view.MotionEvent;
import android.view.SurfaceView;

public class ZoomonTouc extends SurfaceView {
public Bitmap mMyChracter;

public ZoomonTouc(Context context) {
    super(context);
    mMyChracter = BitmapFactory.decodeResource(context.getResources(),
            R.drawable.ic_launcher);
    setWillNotDraw(false);
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    canvas.drawBitmap(mMyChracter, mMyChracter.getWidth()/2, mMyChracter.getHeight()/2, null);
    invalidate();
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    RectF rectF = new RectF(mMyChracter.getWidth()/2, mMyChracter.getHeight()/2, mMyChracter.getWidth() + 100,
            mMyChracter.getHeight() + 100);
    if (rectF.contains(event.getX(), event.getY())) {
        mMyChracter = Bitmap.createScaledBitmap(mMyChracter,
                mMyChracter.getWidth() + 10, mMyChracter.getHeight() + 10,
                false);
    }
    return true;
}

}

要正确测试它,请创建一个活动并将上面的表面设置为活动背景

setContentView(new ZoomonTouc(this));