如何在android中旋转轮子（图像png）

我想在线性布局上旋转png图像。我的图像是半圆形状，上面有不同的颜色

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有什么想法吗？

可能有助于你旋转图像

 RotateAnimation rotate = new RotateAnimation(180, 360, Animation.RELATIVE_TO_SELF, 0.5f,  Animation.RELATIVE_TO_SELF, 0.5f);
 rotate.setDuration(500);
 imageview.startAnimation(rotate);

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度的开始和结束的前两个参数。

可能有助于u旋转图像

 RotateAnimation rotate = new RotateAnimation(180, 360, Animation.RELATIVE_TO_SELF, 0.5f,  Animation.RELATIVE_TO_SELF, 0.5f);
 rotate.setDuration(500);
 imageview.startAnimation(rotate);

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度的开始和结束的前两个参数。

使用矩阵可以执行此操作

大概

img=(ImageView)findViewById(R.id.ImageView01);
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.refresh);
// Getting width & height of the given image.
int w = bmp.getWidth();
int h = bmp.getHeight();
// Setting post rotate to 90
Matrix mtx = new Matrix();
mtx.postRotate(90);
// Rotating Bitmap
Bitmap rotatedBMP = Bitmap.createBitmap(bmp, 0, 0, w, h, mtx, true);
BitmapDrawable bmd = new BitmapDrawable(rotatedBMP);

img.setImageDrawable(bmd);

或者使用动画

RotateAnimation rAnim = new RotateAnimation(0, 359, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
rAnim.setDuration(1000);
imageview.startAnimation(rAnim);

编辑：也看看这个问题

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使用矩阵你可以做到

大概

img=(ImageView)findViewById(R.id.ImageView01);
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.refresh);
// Getting width & height of the given image.
int w = bmp.getWidth();
int h = bmp.getHeight();
// Setting post rotate to 90
Matrix mtx = new Matrix();
mtx.postRotate(90);
// Rotating Bitmap
Bitmap rotatedBMP = Bitmap.createBitmap(bmp, 0, 0, w, h, mtx, true);
BitmapDrawable bmd = new BitmapDrawable(rotatedBMP);

img.setImageDrawable(bmd);

或者使用动画

RotateAnimation rAnim = new RotateAnimation(0, 359, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
rAnim.setDuration(1000);
imageview.startAnimation(rAnim);

编辑：也看看这个问题

这是我做的帽子 计时器每100微秒调用一次pondraw mthod h、 w是图像的高度和宽度

                    new CountDownTimer(2000, 100) {

        public void onTick(long millisUntilFinished) {
            degrees=degrees +(rm.nextFloat()*100);
            postInvalidate();
        }

        public void onFinish() {

        }
    }.start();

将此代码放入ondraw方法中

Matrix m = new Matrix();
m.setRotate(degrees,w/2,h/2);
    bmp=BitmapFactory.decodeResource(context.getResources(),R.drawable.wfortune_wheel);
canvas.drawBitmap(bmp, m, pb);

}这是我做的帽子 计时器每100微秒调用一次pondraw mthod h、 w是图像的高度和宽度

                    new CountDownTimer(2000, 100) {

        public void onTick(long millisUntilFinished) {
            degrees=degrees +(rm.nextFloat()*100);
            postInvalidate();
        }

        public void onFinish() {

        }
    }.start();

将此代码放入ondraw方法中

Matrix m = new Matrix();
m.setRotate(degrees,w/2,h/2);
    bmp=BitmapFactory.decodeResource(context.getResources(),R.drawable.wfortune_wheel);
canvas.drawBitmap(bmp, m, pb);

}

+1用于参考：“如何在Android中进行平滑图像旋转？”+1用于参考：“如何在Android中进行平滑图像旋转？”