// 缩放图片public static Bitmap zoomImg(String img, int newWidth ,int newHeight){// 图片源   Bitmap bm = BitmapFactory.decodeFile(img);   if(null!=bm){    return zoomImg(bm,newWidth,newHeight);   }   return null;}public static Bitmap zoomImg(Context context,String img, int newWidth ,int newHeight){// 图片源try {Bitmap bm = BitmapFactory.decodeStream(context.getAssets().open(img));if (null != bm) {return zoomImg(bm, newWidth, newHeight);}} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}// 缩放图片public static Bitmap zoomImg(Bitmap bm, int newWidth ,int newHeight){   // 获得图片的宽高   int width = bm.getWidth();   int height = bm.getHeight();   // 计算缩放比例   float scaleWidth = ((float) newWidth) / width;   float scaleHeight = ((float) newHeight) / height;   // 取得想要缩放的matrix参数   Matrix matrix = new Matrix();   matrix.postScale(scaleWidth, scaleHeight);   // 得到新的图片   Bitmap newbm = Bitmap.createBitmap(bm, 0, 0, width, height, matrix, true);    return newbm;}