Question

我想沿着SurfaceView中的连续坐标移动位图图像。我在myBall上的坐标(x1, y1)中绘制了位图SurfaceView，如下所示（部分代码）（

    public class MainSurfaceView extends SurfaceView implements Runnable {...
        ...
        @Override
        public void run() {
            while (isRunning) {
                if (!myHolder.getSurface().isValid())
                    continue; 
                Canvas canvas;// Define canvas to paint on it
                canvas = myHolder.lockCanvas();
                //Draw full screen rectangle to hold the floor map.
                Rect dest = new Rect(0, 0, getWidth(), getHeight());
                Paint paint = new Paint();
                paint.setFilterBitmap(true);
                canvas.drawBitmap(bgImage, null, dest, paint);
                //This is the ball I want to move
                canvas.drawBitmap(myBall, x1, y1, null);

                myHolder.unlockCanvasAndPost(canvas);
            }

  }

现在我想把它移到(x2, y2)然后(x3, y3)和......根据需要和一个接一个地移动它。我曾尝试使用TranslateAnimation，但无法做到。

Answer 1

我已经想出如何使用坐标进行动画制作。我将解释我跳过的内容，它会对其他人有所帮助：首先，我将坐标保存为Point对象

List<Point> point_list = new ArrayList<Point>();
point_list.add(new Point(x_value, y_value));//Add the x and y coordinates to the Point\

保留实现Runnable并使用onDraw（）方法而不是run（）方法，如下所示：

public class MainSurfaceView extends SurfaceView {...
  .... 
@Override
protected void onDraw(Canvas canvas) {
// Draw full screen rectangle to hold the floor map.
Rect fArea = new Rect(0, 0, getWidth(), getHeight());
    Paint paint = new Paint();
paint.setFilterBitmap(true);
// draw the paint on the rectangle with the floor map
canvas.drawBitmap(bgImage, null, fArea, paint);

// Get the coordinates of x & y as Point object
List<Point> myPoints = point_list;
// Start printing myBall on the floor (view)
try {
   if (index < myPoints.size()) {
   // Increment the value of index and use it as index for the point_list
   index++;
}
// Print myBall in each coordinates of x & y using the index 
canvas.drawBitmap(myBall, myPoints.get(index).x, myPoints.get(index).y, null);
} catch (IndexOutOfBoundsException e) {
      // TODO: handle exception
}
}

我使用try和catch来避免IndexOutOfBoundryExeption 干杯！

Answer 2

我认为this可能就是你所追求的。您要做的是补间位图，有几种方法可以做到这一点。还有ViewPropertyAnimator，它可以为整个视图设置动画。

如何将位图从一个坐标移动到另一个坐标 - Android开发

2 个答案: