小编sav*_*Bum的帖子

在尝试将文件写入SD卡时,我得到了java.io.FileNotFoundException: /filename (Read-only file system)异常.可悲的是,这里发布的众多解决方案都没有帮助我.我已设置权限,外部存储处于MEDIA_MOUNTED状态.这是有问题的代码:

Log.i("STORAGE", Environment.getExternalStorageState());
OutputStream fos = new FileOutputStream(Helpers.StripExtension(filePath) + ".blk");
fos.write(digest.getBytes());
fos.close();    

filePath来自文件自动收报机.我要做的是从所选文件中读取,然后保存另一个具有相同名称,不同扩展名和其中一些内容的文件.

表现:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="mypackagename"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="10"
    android:targetSdkVersion="15" />

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

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/title_activity_main"
        android:theme="@android:style/Theme.Black" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

logcat的:

 10-25 18:24:34.330: I/FILEPATH(1989): /mnt/sdcard/Untitled.txt
 10-25 18:24:34.360: I/STORAGE(1989): mounted
 10-25 18:24:34.360: W/System.err(1989): java.io.FileNotFoundException: /mnt/sdcard/Untitled.blk (Read-only file system)
 10-25 18:24:34.360: W/System.err(1989):    at org.apache.harmony.luni.platform.OSFileSystem.open(Native Method) …

我正在尝试连接到以openssl开头的测试服务器(这个有限的密码组合是有意的):

openssl s_server -accept 443 -www -tls1_2 -cipher ECDHE:DHE:EDH -cert selfsignedcert.pem -key sskey.pem

我使用的代码类似于msdn的代码

public static bool ValidateServerCertificate(
      object sender,
      X509Certificate certificate,
      X509Chain chain,
      SslPolicyErrors sslPolicyErrors)
{
        return true;
}

...

var client = new TcpClient(target, port);
SslStream sslStream = new SslStream(client.GetStream(), false,ValidateServerCertificate,null);
sslStream.AuthenticateAsClient(target, null, SslProtocols.Tls12, false);

但是我在最后一行得到一个例外:A call to SSPI failed, see inner exception.内部异常说:The Local Security Authority cannot be contacted.通过查看wireshark,我可以说TLS握手结束Server Hello, Certificate, Server Key Exchange, Server Hello Done并且选择的密码套件是TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 (0x009f).

我可以使用Firefox访问该URL,但不能使用IE(它只是说"此页面无法显示"),因此它看起来像schannel问题.

当我用所有密码套件( …