Android中矩阵旋转后的拉伸位图

我正在尝试旋转JPEG数据数组，将其转换为位图并旋转矩阵。它工作得很好，但当我尝试旋转一个16:9的图像时，我的问题出现了（4:3，我想它也会发生，但我能很好地欣赏它）。因为矩阵会旋转图像，但不会调整其大小，所以我的位图看起来会拉伸到宽度或高度，这取决于我随dataArray发送的方向

  protected Bitmap doInBackground(Void... params) {

        // Decode image in background.

        Bitmap bitmap = CameraUtil.downSample(mData, mDownSampleFactor);
        Matrix m = new Matrix();
        Log.i(TAG, "Bitmap=" + bitmap.getWidth() + "x" + bitmap.getHeight());
        if ((mOrientation != 0 || mMirror) && (bitmap != null)) {              

            if (mMirror) {

            m.setScale(1f, -1f);
        }

            m.postRotate(mOrientation);
            return Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),m,false);
        }

        return bitmap;

    }

 public static Bitmap downSample(final byte[] data, int downSampleFactor) {
        final BitmapFactory.Options opts = new BitmapFactory.Options();
        // Downsample the image
        opts.inSampleSize = downSampleFactor;

    return  BitmapFactory.decodeByteArray(data, 0, data.length, opts);
}

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我已经尝试手动调整图像大小，还尝试将阵列转换为NV21图像，并旋转阵列，以便稍后将其转换为位图并发送。但它给我带来了问题（速度太慢了，有时看起来完全是绿色和粉色（彩虹！））。我也试着使用Pre、Set和PostRotate，但是我做的测试之间没有任何不同

我已经找到了修复它的方法。这是裁剪方法内部的问题，该方法使用静态度量创建位图，我根据纵横比将该方法更改为addapt

 if (bmp.getWidth() != radius || bmp.getHeight() != radius) {
            //Depending of the Height and Width we get the Aspect Ratio to scale the image before crop it
            if (bmp.getHeight() > bmp.getWidth()) {
                mAspectRatio = (float) bmp.getHeight() / (float) bmp.getWidth();
                sbmp = Bitmap.createScaledBitmap(bmp, radius, (int) (radius * mAspectRatio), false);
            } else {
                mAspectRatio = (float) bmp.getWidth() / (float) bmp.getHeight();
                sbmp = Bitmap.createScaledBitmap(bmp, (int) (radius * mAspectRatio), radius, false);

            }
        }
    } else {
        sbmp = bmp;
    }
    //output Bitmap will have the final Scale of the Thumbnail, which will be radius x radius
    Bitmap output = Bitmap.createBitmap(radius,radius, Config.ARGB_8888);
    Canvas canvas = new Canvas(output);
//.....Draw canvas, etc etc

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我已经找到了修复它的方法。这是裁剪方法内部的问题，该方法使用静态度量创建位图，我根据纵横比将该方法更改为addapt

 if (bmp.getWidth() != radius || bmp.getHeight() != radius) {
            //Depending of the Height and Width we get the Aspect Ratio to scale the image before crop it
            if (bmp.getHeight() > bmp.getWidth()) {
                mAspectRatio = (float) bmp.getHeight() / (float) bmp.getWidth();
                sbmp = Bitmap.createScaledBitmap(bmp, radius, (int) (radius * mAspectRatio), false);
            } else {
                mAspectRatio = (float) bmp.getWidth() / (float) bmp.getHeight();
                sbmp = Bitmap.createScaledBitmap(bmp, (int) (radius * mAspectRatio), radius, false);

            }
        }
    } else {
        sbmp = bmp;
    }
    //output Bitmap will have the final Scale of the Thumbnail, which will be radius x radius
    Bitmap output = Bitmap.createBitmap(radius,radius, Config.ARGB_8888);
    Canvas canvas = new Canvas(output);
//.....Draw canvas, etc etc