为了在你的本地计算机上生成你的密钥散列，运行Java的keytool实用程序(它应该在你的控制台路径上)针对Android调试密钥存储库。默认情况下，在你的home .android目录下)。在OS X上运行:

keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore | openssl sha1 -binary | openssl base64

Windows操作系统使用:-

keytool -exportcert -alias androiddebugkey -keystore %HOMEPATH%\.android\debug.keystore | openssl sha1 -binary | openssl base64

希望这对你有所帮助

参考开发者facebook网站

很容易找到你的android项目的sha1

然后粘贴到这个网站上

对于get sha1只是

// vscode and my cmd
project-name/cd android && ./gradlew signingReport

// other 
project-name/cd android && ./gradlew signingReport

我遇到了完全相同的问题，我没有被要求提供密码，而且似乎我的密钥库文件路径错误。

事实上，如果keytool没有找到您设置的密钥存储库，它将创建一个密钥存储库，并提供错误的密钥，因为它没有使用正确的密钥。

一般的规则是，如果你没有被要求输入密码，那么你生成了错误的密钥。

    private fun generateKeyHash(): String? {try {
    val info =packageManager.getPackageInfo(packageName, PackageManager.GET_SIGNATURES)
    for (signature in info.signatures) {
        val md: MessageDigest = MessageDigest.getInstance("SHA")
        md.update(signature.toByteArray())
        return String(Base64.encode(md.digest(), 0))
    }
} catch (e: Exception) {
    Log.e("exception", e.toString())
}
    return "key hash not found"
}

OpenSSL:如果你的操作系统没有预安装OpenSSL(例如Windows没有预安装)，你就必须安装它。如何安装取决于您的操作系统(对于Windows，请查看coder_For_Life22提供的链接)。

最简单的方法是将openssl.exe二进制文件复制到您的keytool路径(如果您使用的是Windows)。如果不想这样做，则必须将其添加到PATH环境变量中。然后执行文档中提供的命令。

keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore | openssl sha1 -binary | openssl base64

注意-keystore后面的参数指向调试密钥库。这个位置也取决于您的操作系统。应位于下列地点之一:

Windows Vista或7 - C:\Users\.android\debug.keystore Windows XP - C:\Documents and Settings\.android\ debug.keystore OS X和Linux - ~/.android/debug.keystore

如果所有操作都正确，系统将提示您输入密码。这是用于调试证书的android。如果密码正确，控制台将输出一个散列(有些随机字符和数字)。

把它复制到android键哈希字段内的首选项你的应用程序在facebook上。要做到这一点，请访问developers.facebook.com/apps，选择你的应用程序，进入编辑设置，向下滚动。之后，等待几分钟，直到更改生效。

this will help newbees also. just adding more details to @coder_For_Life22's answer. if this answer helps you don't forget to upvote. it motivates us. for this you must already know the path of the app's keystore file and password for this example consider the key is stored at "c:\keystorekey\new.jks" 1. open this page https://code.google.com/archive/p/openssl-for-windows/downloads 2. download 32 or 64 bit zip file as per your windows OS. 3. extract the downloaded file where ever you want and remember the path. 4. for this example we consider that you have extracted the folder in download folder. so the file address will be "C:\Users\0\Downloads\openssl-0.9.8e_X64\bin\openssl.exe"; 5. now on keyboard press windows+r button. 6. this will open run box. 7. type cmd and press Ctrl+Shift+Enter. 8. this will open command prompt as administrator. 9. here navigate to java's bin folder: if you use jre provided by Android Studio you will find the path as follows: a. open android studio. b. file->project structure c. in the left pane, click 'SDK location' d. in the right pane, below 'JDK location' is your jre path. e. add "\bin" at the end of this path as the file "keytool.exe", we need, is inside this folder. for this example i consider, you have installed java separately and following is the path "C:\Program Files\Java\jre-10.0.2\bin" if you have installed 32bit java it will be in "C:\Program Files (x86)\Java\jre-10.0.2\bin" 10. now with above paths execute command as following:

keytool -exportcert -alias androiddebugkey -keystore "c:\keystorekey\new.jks" | "C:\Users\0\Downloads\openssl-0.9.8e_X64\bin\openssl.exe" sha1 -binary |"C:\Users\0\Downloads\openssl-0.9.8e_X64\bin\openssl.exe" base64

您将被要求输入密码，请输入您在创建密钥存储库密钥时所提供的密码。 ! ! 这将给你钥匙

错误: 如果你得到: --- 'keytool'不能被识别为内部或外部命令 --- 这意味着Java安装在其他地方。