protected Options getOptions(Context context) {
   Options options = new Options();
   options.inDensity = 330;
   options.inTargetDensity =
       (int) (context.getResources().getDisplayMetrics().density * ((float) options.inDensity));
   return options;
 }
  /**
   * @param data 数据或路径
   * @param width 目标宽
   * @param height 目标高
   * @return 图片
   */
  private Bitmap createBitmap(Object data, int width, int height) {
    Options options = new Options();
    int scale = 1;

    if (width > 0 && height > 0) { // 创建目标大小的图片
      options.inJustDecodeBounds = true;
      if (data instanceof String) {
        BitmapFactory.decodeFile((String) data, options);
      } else {
        BitmapFactory.decodeByteArray((byte[]) data, 0, ((byte[]) data).length, options);
      }
      int dw = options.outWidth / width;
      int dh = options.outHeight / height;
      scale = Math.max(dw, dh);
      options = new Options();
    }

    options.inDensity = DeviceInfo.getInstance().getDencity();
    options.inScaled = true;
    options.inPurgeable = true;
    options.inSampleSize = scale;

    Bitmap bitmap = null;
    if (data instanceof String) {
      bitmap = BitmapFactory.decodeFile((String) data, options);
    } else {
      bitmap = BitmapFactory.decodeByteArray((byte[]) data, 0, ((byte[]) data).length, options);
    }
    return bitmap;
  }
 private void copyOptions(Options srcOptions, Options destOptions) {
   destOptions.inDensity = srcOptions.inDensity;
   destOptions.inDither = srcOptions.inDither;
   destOptions.inInputShareable = srcOptions.inInputShareable;
   destOptions.inJustDecodeBounds = srcOptions.inJustDecodeBounds;
   destOptions.inPreferredConfig = srcOptions.inPreferredConfig;
   destOptions.inPurgeable = srcOptions.inPurgeable;
   destOptions.inSampleSize = srcOptions.inSampleSize;
   destOptions.inScaled = srcOptions.inScaled;
   destOptions.inScreenDensity = srcOptions.inScreenDensity;
   destOptions.inTargetDensity = srcOptions.inTargetDensity;
   destOptions.inTempStorage = srcOptions.inTempStorage;
   if (Build.VERSION.SDK_INT >= 10) copyOptions10(srcOptions, destOptions);
   if (Build.VERSION.SDK_INT >= 11) copyOptions11(srcOptions, destOptions);
 }