我试着去建立一个名为Android上的SD卡上的图像目录。这是我的code，但它不工作？任何人都可以给我一些建议吗？

 文件picDirectory =新的文件（MNT / SD卡/图像）;
picDirectory.mkdirs（）;
 

解决方案

您想确保你正确地找到你的SD卡的地址，你不能确定它总是在任何特定的地址。您将要做到以下几点！

 文件目录=新的文件（Environment.getExternalStorageDirectory（）+文件分割符+图像）;
directory.mkdirs（）;
 

让我知道这对你的作品！

您还需要在以下行的的Andr​​oidManifest.xml

＆LT;使用-权限的Andr​​oid：名称=android.permission.WRITE_EXTERNAL_STORAG​​E/＆GT;

Im trying to build a directory called "images" on the SD card on android. This is my code but its not working? Can anyone give me some advice?

File picDirectory = new File("mnt/sdcard/images");
picDirectory.mkdirs();

You want to be sure you are correctly finding the address of your SDCard, you can't be sure its always at any particular address. You will want to do the following!

File directory = new File(Environment.getExternalStorageDirectory()+File.separator+"images");
directory.mkdirs();

Let me know if this works for you!

You will also need the following line in your AndroidManifest.xml

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