Android(安卓)图片与屏幕坐标点

计算获取的ImageView图片显示时的实际大小（ps：这里会用到可见ImageView的宽高主要是因为我需要根据可见ImageView的宽高来设置其他控件的宽高，还有就是后面关于图像与屏幕坐标点的转换会需要用到）

 private void setLayoutParams() {        int[] size = ImageUtils.getRealImgShowSize(mImageView);        mRealImgShowWidth = size[0];        mRealImgShowHeight = size[1];        ViewGroup.LayoutParams params = mImageView.getLayoutParams();        params.height = mRealImgShowHeight;        params.width = mRealImgShowWidth;        mImageView.setLayoutParams(params);           }   //0:宽 1：高  public static int[] getRealImgShowSize(ImageView imageview){        Rect rect=imageview.getDrawable().getBounds();        //可见image的宽高        int scaledHeight = rect.height();        int scaledWidth = rect.width();        //获得ImageView中Image的变换矩阵        Matrix matrix= imageview.getImageMatrix();        float[] values = new float[10];        matrix.getValues(values);        //Image在绘制过程中的变换矩阵，从中获得x和y方向的缩放系数        float sx = values[0];        float sy = values[4];        //计算Image在屏幕上实际绘制的宽高       int realImgShowWidth =(int) (scaledWidth * sx);       int realImgShowHeight =(int)( scaledHeight * sy);       int[] size=new int[]{realImgShowWidth,realImgShowHeight};        return size;    }

//屏幕坐标转图片坐标    private List getBitmapPoints(Bitmap original, Map points) {        List srccorners = new ArrayList<>();        float xRatio = (float) original.getWidth() /mRealImgShowWidth;//mRealImgShowWidth=ImageView.getWidth()        float yRatio = (float) original.getHeight() / mRealImgShowHeight;        float x1 = (points.get(0).x) * xRatio;        float x2 = (points.get(1).x) * xRatio;        float x3 = (points.get(2).x) * xRatio;        float x4 = (points.get(3).x) * xRatio;        float y1 = (points.get(0).y) * yRatio;        float y2 = (points.get(1).y) * yRatio;        float y3 = (points.get(2).y) * yRatio;        float y4 = (points.get(3).y) * yRatio;        srccorners.add(new Point(x1, y1));        srccorners.add(new Point(x2, y2));        srccorners.add(new Point(x3, y3));        srccorners.add(new Point(x4, y4));        return srccorners;    }    //图片坐标转屏幕坐标    private  Map getScreenPoints(Bitmap original,Map points){        float xRatio = (float) original.getWidth() / mRealImgShowWidth;        float yRatio = (float) original.getHeight() / mRealImgShowHeight;       Map screenPoints=new HashMap<>();        float x1 = points.get(0).x/xRatio;        float x2 = points.get(1).x / xRatio;        float x3 = points.get(2).x / xRatio;        float x4 =points.get(3).x / xRatio;        float y1 =  points.get(0).y / yRatio;        float y2 =  points.get(1).y/ yRatio;        float y3 = points.get(2).y/ yRatio;        float y4 =  points.get(3).y / yRatio;        screenPoints.put(0,new PointF(x1,y1));        screenPoints.put(1,new PointF(x2,y2));        screenPoints.put(2,new PointF(x3,y3));        screenPoints.put(3,new PointF(x4,y4));        return screenPoints;    }

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