Android的MKDIR不做文件夹 [英] Android mkdir not making folder

问题描述

今晚，我现在有做的事情，我认为将是简单的问题......让在到/ mnt / SD卡的文件夹。

Tonight I am currently having issues doing something that I thought would be simple... making a folder in /mnt/sdcard.

我已经设置了如下权限：

I have set the follow permission:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

我的 Main.java 具有以下，以使该文件夹：

My Main.java has the following to make the folder:

public class Main extends TabActivity {
    static int index = 1;
    private static final String TAG = "Main";       

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        File folder = new File(Environment.getExternalStorageDirectory () + "/tallgrass/images");
        boolean success = false;
        if(!folder.exists()){
            success = folder.mkdir();
        }
        if (!success){ 
            Log.d(TAG,"Folder not created.");
        }
        else{
            Log.d(TAG,"Folder created!");
        }
    }

我得到的文件夹中创建！在我的日志信息，但是当我同时检查到/ mnt / SD卡和 / SD卡没有一个具有文件夹。我已经打过电话：

I get the "Folder created!" message in my log but when I check both /mnt/sdcard and /sdcard neither one has the folder. I have tried calling:

Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())

和它返回true。我实在不明白这一个，因为所有迹象都指向它应该工作。我也试图与来自以防SD卡被安装或作为我目前使用模拟器的我的手机，而不是用于开发一些电脑断开手机。说到这，确实可调试到真可能作出的文件夹prevent呢？

and it returns true. I just can't figure this one out because all signs are pointing that it should work. I have also tried it with the phone disconnected from the PC in case the SD card was mounting or something as I am currently using my phone instead of the emulator for developing. Speaking of which, does debuggable to true maybe prevent it from making the folder?

谢谢！

推荐答案

请问到/ mnt / SD卡/高杆草/ 目录是否存在？ （我猜没有，但你永远不知道。）

Does the /mnt/sdcard/tallgrass/ directory exist? (I'm guessing not, but you never know.)

的<一个href="http://developer.android.com/reference/java/io/File.html#mkdirs%28%29"><$c$c>File.mkdirs()方法将创建所有必需的目录; 的mkdir（）将只创建的最后的路径名目录。

The File.mkdirs() method will create all needed directories; mkdir() will only create the last directory in the pathname.

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