最简单的解决方案:

不加哈希键，实现其他所有东西 当facebook登录被按下，你会得到一个错误说“无效的键哈希。密钥哈希“xxx”不匹配任何存储密钥. ...” 打开facebook应用程序仪表板，并添加哈希值“xxx=”(“xxx”哈希值来自错误+“=”符号)

下载openSSL ->安装它->通常会安装在C:\ openSSL

然后打开CMD并键入

cd../../Program Files (Enter)

java (Enter)

dir (Enter)

cd jdk1.6.0_17 (varies with jdk versions) (Enter)

查看jdk版本到C:/program files/java/jdk_version

cd bin (enter)

keytool -exportcert -alias androiddebugkey -keystore C:Users\Shalini\.android\debug.keystore | "C:\OpenSSL\bin\openssl sha1 -binary | "C:\OpenSSL\bin\openssl base64 (Enter)

它会问你密码是android。

以下是步骤

Download openssl from Google code (If you have a 64 bit machine you must download openssl-0.9.8e X64 not the latest version) Extract it. create a folder- OpenSSL in C:/ and copy the extracted code here. detect debug.keystore file path. If u didn't find, then do a search in C:/ and use the Path in the command in next step. detect your keytool.exe path and go to that dir/ in command prompt and run this command in 1 line- $ keytool -exportcert -alias androiddebugkey -keystore "C:\Documents and Settings\Administrator.android\debug.keystore" | "C:\OpenSSL\bin\openssl" sha1 -binary |"C:\OpenSSL\bin\openssl" base64 it will ask for password, put android that's all. u will get a key-hash

欲了解更多信息，请访问这里

这是Xamarin的版本

private void printKeyHash()
{
    try
    {
        PackageInfo info = PackageManager.GetPackageInfo(PackageName, PackageInfoFlags.Signatures);
        foreach (var signature in info.Signatures)
        {
            MessageDigest md = MessageDigest.GetInstance("SHA1");
            md.Update(signature.ToByteArray());
            var hash = Base64.EncodeToString(md.Digest(), Base64Flags.Default);
            Log.Debug("KeyHash:", hash);
        }
    }
    catch (PackageManager.NameNotFoundException e)
    {

    }
    catch (NoSuchAlgorithmException e)
    {

    }
}

对于Android应用程序

这段代码用于在Android应用程序中获取Facebook集成的哈希键。我已经测试了所有的设备，一切正常。只更改此代码的包名:

private void facebookHashKey() {

    try {
        PackageInfo info = getPackageManager().getPackageInfo("com.app.helpcove", PackageManager.GET_SIGNATURES);
        for (Signature signature : info.signatures) {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            String hashCode  = Base64.encodeToString(md.digest(), Base64.DEFAULT);
            System.out.println("Print the hashKey for Facebook :"+hashCode);
            Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
        }
    } catch (NameNotFoundException e) {

    } catch (NoSuchAlgorithmException e) {

    }
}

我找到的最简单的解决方法是:

打开原木猫 尝试使用Android SDK访问Facebook 在日志中寻找这样的行: 04-24 01:14:08.605: I/System.out(31395): invalid_key:Android key mismatch。 您的密钥“abcdefgHIJKLMN+OPqrstuvwzyz”与您的 应用程序设置。检查您的应用程序设置 http://www.facebook.com/developers 复制“abcdefgHIJKLMN+OPqrstuvwzyz”，并将其粘贴到Facebook Android密钥哈希区。