android - 写入 sdCard 时权限被拒绝

Question

我正在尝试将文件写入 SDCard，但我在 logcat 中遇到错误:

01-24 09:03:33.647: W/System.err(3353): java.io.FileNotFoundException: /mnt/sdcard/fun/itisfun.txt: open failed: EACCES (Permission denied)
    01-24 08:24:28.007: W/System.err(3353): Caused by: libcore.io.ErrnoException: open failed: EACCES (Permission denied)
    01-24 09:03:33.756: W/System.err(3353):at libcore.io.Posix.open(Native Method)

这里是我写入 SDCard 的代码:

File root = null;     
try {  
    // check for SDcard   
    root = Environment.getExternalStorageDirectory();                   
    Log.i(TAG,"path.." +root.getAbsolutePath());  

    //check sdcard permission  
    if (root.canWrite()){  
        File fileDir = new File(root.getAbsolutePath()+"/fun/");  
        fileDir.mkdirs();  

        File file = new File(fileDir, "itisfun.txt");  
        FileWriter filewriter = new FileWriter(file);  
        BufferedWriter out = new BufferedWriter(filewriter);  
        out.write("I m enjoying......dude");  
        out.close();
    }
} catch(...) {
    ...
}

list :

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

Answer 1

要写入 Sdcard，您需要在 list 文件中授予权限

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