Java android中的位图canvas.drawBitmap方法

基本上我想用drawBitmap方法替换drawcircle方法。这个想法是用我导入的图像替换圆

这是我的资源方法

   // Create the bitmap object using BitmapFactory
    // Access the application resource, and then retrieve the drawable
    Bitmap bitmap = BitmapFactory.decodeResource(this.getResources(), R.drawable.ball); 

我想更改drawcircle方法，并将其替换为drawbitmap

// Create a new class extended from the View class
class GameView extends View
{
    Paint paint = new Paint();

    // Constructor
    public GameView(Context context)
    {
        super(context);
        setFocusable(true);
    }

    // Override the onDraw method of the View class to configure
    public void onDraw(Canvas canvas)
    {
        // Configure the paint which will be used to draw the view
        paint.setStyle(Paint.Style.FILL);
        paint.setAntiAlias(true);
        // If the game is over
        if (isLose)
        {
            paint.setColor(Color.RED);
            paint.setTextSize(40);
            canvas.drawText("Game Over", 50, 200, paint);
        }
        // Otherwise
        else
        {
            // set the color of the ball
            paint.setColor(Color.rgb(240, 240, 80));
            canvas.drawCircle(ballX, ballY, BALL_SIZE, paint);
            // set the color of the racket
            paint.setColor(Color.rgb(80, 80, 200));
            canvas.drawRect(racketX, racketY, racketX + RACKET_WIDTH,
                    racketY + RACKET_HEIGHT, paint);
        }
    }

我知道我必须以某种方式替换canvas.drawCircle，但到目前为止我所做的每一次尝试都没有成功。

---

如果有人能帮忙，我将不胜感激

更改以下代码：

    // set the color of the ball
    paint.setColor(Color.rgb(240, 240, 80));
    canvas.drawCircle(ballX, ballY, BALL_SIZE, paint);

致：

在上面的代码中，位图是指您在代码中创建的位图，而desRect是一个决定在何处绘制位图的Rect。可以这样计算：

  Rect destRect = new Rect(ballX - BALL_SIZE, ballY - BALL_SIZE, ballX + BALL_SIZE, ballY + BALL_SIZE);

---

请记住在onDraw方法之外进行计算，以防出现效率问题。

我希望将canvas.drawCircle替换为看起来像球的图像，而不是只绘制一个圆。

  Rect destRect = new Rect(ballX - BALL_SIZE, ballY - BALL_SIZE, ballX + BALL_SIZE, ballY + BALL_SIZE);