在一个类似的问题上，我发现这对我很有效:

将你想知道散列值的apkname.apk文件复制到“Java\jdk1.7.0_79\bin”文件夹中 执行keytool -list -printcert -jarfile apkname.apk 复制SHA1值并使用此站点进行转换 使用转换后的Keyhash值(例如:zaHqo1xcaPv6CmvlWnJk3SaNRIQ=)

要获得Android密钥哈希码，请遵循以下步骤:

下载OpenSSL for Windows 现在解压缩到C盘 打开CMD提示符 输入cd C:\Program Files\Java\ jdk1.6.0_26\bin 然后只输入keytool -export -alias myAlias -keystore c:\ users \您的用户名\。android\myKeyStore | C:\openssl-0.9.8 k_win32 \bin\openssl sha1 -二进制| C:\openssl-0.9.8 k_win32 \bin\openssl enc -a -e 完成

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)
    {

    }
}

facebook开发者网站上的官方文件:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Add code to print out the key hash
    try {
        PackageInfo info = getPackageManager().getPackageInfo(
                "com.facebook.samples.hellofacebook", 
                PackageManager.GET_SIGNATURES);
        for (Signature signature : info.signatures) {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
            }
    } catch (NameNotFoundException e) {

    } catch (NoSuchAlgorithmException e) {

    }

你可以从Java/Kotlin Activity中打印哈希键。部分代码已弃用，但这里是包含新旧代码的完整解决方案。

private fun printHashKey(context: Context) {
    try {

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
            val packageInfo: PackageInfo = context.packageManager.getPackageInfo(
                context.packageName,
                PackageManager.GET_SIGNING_CERTIFICATES
            )

            for (signature in packageInfo.signingInfo.apkContentsSigners) {
                val md = MessageDigest.getInstance("SHA")
                md.update(signature.toByteArray())
                Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT))
            }
        } else {
            val packageInfo: PackageInfo = context.packageManager.getPackageInfo(
                context.packageName,
                PackageManager.GET_SIGNATURES
            )

            for (signature in packageInfo.signatures) {
                val md = MessageDigest.getInstance("SHA")
                md.update(signature.toByteArray())
                Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT))
            }
        }

    } catch (e: PackageManager.NameNotFoundException) {
        Log.d(TAG, "printHashKey: PackageManager.NameNotFoundException -> $e")
    } catch (e: NoSuchAlgorithmException) {
        Log.d(TAG, "printHashKey: NoSuchAlgorithmException -> $e")
    }
}

要生成释放密钥的散列，请在Mac或Windows上运行以下命令，替换释放密钥别名和密钥存储库的路径。

在Windows上，使用:

keytool -exportcert -alias <RELEASE_KEY_ALIAS> -keystore <RELEASE_KEY_PATH> | openssl sha1 -binary | openssl base64

这个命令应该生成一个28个字符的字符串。记住，复制并粘贴这个释放键哈希到你的Facebook应用ID的Android设置。

图片:fbcdn-dragon-a.akamaihd.net/hphotos-ak-xpa1/t39.2178-6/851568_627654437290708_1803108402_n.png

参考网址:https://developers.facebook.com/docs/android/getting-started#release-key-hash和http://note.taable.com