Android App开发记录—sd Card 读写

SD Card的读写

(1)查
4000
看确保模拟器中有sd card，可以通过Device Manager来查看

(2)打开sd card的读写权限

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

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

(3)查看sd card是否可访问

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

{
.......
}

(4)读写sd card中的文件

public File createFile(String strFile)

{
File file = new File(strFile);

try
{
file.createNewFile();
}
catch(Exception ex)
{
ex.printStackTrace();
}
return file;

}