Android-10-读写 external storage 文件报错：open-failed-EACCES-Permission-denied，高版本工程Manifest要设置 android:requestLegacyExternalStorage="true"，才能兼容老代码

December 10, 2021

• 参考：
  • Exception ‘open failed: EACCES (Permission denied)’ on Android
  • Android 10 open failed: EACCES (Permission denied)
  • How to save file to external storage in Android 10 and Above
  • Access documents and other files from shared storage

现象

Android java代码中使用 File 和 FileOutputStream 打开文件，执行时报错：open failed: EACCES (Permission denied)

Manifest 里面定义了READ_EXTERNAL_STORAGE 和 WRITE_EXTERNAL_STORAGE 权限，运行时也require了permission

解决

Manafest 里面给 application 添加属性： <application android:requestLegacyExternalStorage="true"