[Android] 判斷否有SD卡

1
2
3
4
5
6
7
8
9
10
11
12
13

// 判斷否有SD卡
if(android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)){
 output = new FileOutputStream("/sdcard/output.txt");
}else{
 output = new FileOutputStream("/data/data/output.txt");
}
String bt = "輸入訊息";
try {
 // 轉byte
 output.write(bt.getBytes());
} catch (IOException e) {
 e.printStackTrace();
}

1
2
3
4

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






參考網站:
http://blog.csdn.net/xinzheng_wang/article/details/7827775