java.io.FileNotFoundException: /storage/emulated/0/ ……: open failed: EACCES (Permissi

已经在manifests添加了权限：

<!--往sdcard中写入数据的权限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!--在sdcard中创建/删除文件的权限 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

但是还是 failed: EACCES (Permission denied) 拒绝访问

需要动态获取权限

//动态获取内存存储权限
public static void verifyStoragePermissions(Activity activity) {// Check if we have write permission
    int permission = ActivityCompat.checkSelfPermission(activity,Manifest.permission.WRITE_EXTERNAL_STORAGE);if (permission != PackageManager.PERMISSION_GRANTED) {// We don't have permission so prompt the user
        ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE,REQUEST_EXTERNAL_STORAGE);}
}

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