只能獲取到 讀權限，寫權限無法成功獲取，我該怎麼獲取啊？
好像是android 6.0 不允許第三方應用寫，但是還是有不少應用做到了寫，
請問這是怎麼實現的？ 非常感謝
You have to add the following codes into the project's AndroidManifest.xml,
It means your app will get the reading and writing permission with the internal storages.
