Android sdcard相关内容

1 在AndroidManifest文件中加入sdcard操作权限
　　<!--在SDCard中创建与删除文件权限 -->
　　<uses-permissioandroid:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/> 
　　<!--往SDCard写入数据权限 --> 

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

2 确认sdcard的存在

　　android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)

public Boolean hassdcard(){String status = Environment.getExternalStorageState();if (status.equals(Environment.MEDIA_MOUNTED)) {   return true;  } else {   return false;  }}

3 获取扩展存储设备的文件目录

　　android.os.Environment.getExternalStorageDirectory();

4 在sdcard下创建创建文件夹

if(hassdcard()){Log.i("result1","has mnt sdcard");File destDir = new File("/mnt/sdcard/XXX");  if (!destDir.exists()) {  Log.i("result","now mkdirs in /mnt/sdcard/XXX");   destDir.mkdirs();  }else{   Log.i("result","/mnt/sdcard/XXX had mkdir");  }}else{Log.i("result","hasn't mnt sdcard");}