无法在模拟器上的/storage/emulated/0 上创建目录

Can#39;t create a directory on /storage/emulated/0 on emulator(无法在模拟器上的/storage/emulated/0 上创建目录)

问题描述

我正在尝试在我的 android 模拟器上创建一个目录，但我做不到，我已经拥有清单 write_storage 的权限，并且我没有收到任何错误但 mkdir() 返回 false，我验证外部存储是否是也是可写的，它可以在我的代码的物理设备上运行:

I'm trying to create a directory on my android emulator but I can't do it, I already have the permission on manifest write_storage, and I get no erros but mkdir() return false, I verify if external storage is writtable too and it is, it works on physical devices my code:

 /// Cria uma nova pasta para colocar o backup
    File direct = new File(Environment.getExternalStorageDirectory(),
            "/Financas RW Backup");
    try {


        if (!direct.exists()) {
            if(isExternalStorageWritable()&&isExternalStorageReadable()) {
              if(  direct.mkdir()) {
                  fachada.showMessage(ExportImportDB.this," Criado");
              }else{
                  fachada.showMessage(ExportImportDB.this," Não Criado");
              }
            }
        }
    } catch (Exception e) {
        fachada.showMessage(this, e.toString());
    }

推荐答案

你必须选择:

• 将您的 compileSdkVersion 和 targetSdkVersion 降级为 build.gradle
中的较低版本
• 在 Android 6 上需要在运行时请求写入权限.

• Downgrade your compileSdkVersion and targetSdkVersion to lower version in your build.gradle
• Request write permission at runtime is required on Android 6 .

我个人不建议第一个.欲了解更多信息，请查看:

I personally don't advice the first one. For more info check:

• Android 6.0 Marshmallow.无法写入 SD 卡
• Google Play 服务 8.1 和 Android 6.0 权限

希望这会有所帮助！

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