[fix]优化图片导出固定为.png格式

app/src/main/java/com/datarecovery/master/utils/FileUtil.java

@@ -52,7 +52,7 @@ public class FileUtil {
 
     public static String getCreateFileName(@MediaStoreHelper.MediaType int mediaType, String fileName) {
         if (mediaType == MediaStoreHelper.TYPE_IMAGE) {
-            return getExportFileName(IMAGE_PREFIX, ".png", fileName);
+            return getExportFileName(IMAGE_PREFIX, ".png", "");
         } else if (mediaType == MediaStoreHelper.TYPE_VIDEO) {
             return getExportFileName(VIDEO_PREFIX, ".mp4", fileName);
         } else if (mediaType == MediaStoreHelper.TYPE_AUDIO) {