android 根据图片路径获取图片缩略图

    /**      * 根据指定的图像路径和大小来获取缩略图      *      * @param path      图像的路径      * @param maxWidth  指定输出图像的宽度      * @param maxHeight 指定输出图像的高度      * @return 生成的缩略图      */      public static Bitmap revitionImageSize(String path, int maxWidth, int maxHeight) throws IOException {          Bitmap bitmap = null;          try {              BufferedInputStream in = new BufferedInputStream(new FileInputStream(                      new File(path)));              BitmapFactory.Options options = new BitmapFactory.Options();              options.inJustDecodeBounds = true;              BitmapFactory.decodeStream(in, null, options);              in.close();              int i = 0;              while (true) {                  if ((options.outWidth >> i <= maxWidth)                          && (options.outHeight >> i <= maxHeight)) {                      in = new BufferedInputStream(                              new FileInputStream(new File(path)));                      options.inSampleSize = (int) Math.pow(2.0D, i);                      options.inJustDecodeBounds = false;                      bitmap = BitmapFactory.decodeStream(in, null, options);                      break;                  }                  i += 1;              }          } catch (Exception e) {              return null;          }          return bitmap;      }
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