在上传照片时遇到上传路径异常：content://media/external/images/media/539163
转成：/storage/emulated/0/DCIM/Camera/IMG_20160807_133403.jpg路径；

PHOTO_DATA（content://media/external/images/media/539163）

Log.d(“log”,”照片路径信息：”+String.valueOf(getRealPathFromUri(this,PHOTO_DATA)));

解决方法：
public static String getRealPathFromUri(Context context, Uri contentUri) {
Cursor cursor = null;
try {
String[] proj = { MediaStore.Images.Media.DATA };
cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} finally {
if (cursor != null) {
cursor.close();
}
}
}