我正在尝试使用以下代码旋转位图。
代码在模拟器上工作正常(虽然无限旋转有一个小的延迟,但这是另一个故事)但是在实际设备上测试旋转是错误的(我认为错误的支点)。
我感谢任何帮助。
公共类CircleAnimation扩展了View {
Bitmap bitmap;
Paint paint;
RotateAnimation rotate;
AlphaAnimation blend;
ScaleAnimation scale;
AnimationSet spriteAnimation;
float centerX;
float centerY;
float offsetX;
float offsetY;
public CircleAnimation(Context context) {
super(context);
// TODO Auto-generated constructor stub
bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.tile);
offsetX = bitmap.getWidth() / 2;
offsetY = bitmap.getHeight() / 2;
paint = new Paint();
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
}
@Override
protected void onDraw(Canvas canvas){
//Bitmap myBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.tile);
//canvas.drawBitmap(myBitmap, 0, 0, null);
super.onDraw(canvas);
if (spriteAnimation == null) {
centerX = canvas.getWidth() / 2;
centerY = canvas.getHeight() / 2;
createAnimation(canvas);
}
canvas.drawBitmap(bitmap, centerX - offsetX, centerY - offsetY, paint);
}
private void createAnimation(final Canvas canvas) {
rotate = new RotateAnimation(0, 360, centerX, centerY);
rotate.setRepeatCount(Animation.INFINITE);
rotate.setInterpolator(new LinearInterpolator());
rotate.setStartOffset(0);
spriteAnimation = new AnimationSet(true);
spriteAnimation.addAnimation(rotate);
spriteAnimation.setDuration(1000);
startAnimation(spriteAnimation);
}
}
答案 0 :(得分:0)
好的,我发现了问题。
我已将最低SDK设置为8,并将SDK定位为8。我在15岁时进行测试。
将目标更改为15并且有效。
:P