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。

以下是你需要做的

从代码下载openSSl 提取它。在C:/目录下创建一个名为OpenSSL的文件夹，并将解压后的代码复制到这里。

检测调试。Keystore文件路径。如果你没有找到，那么在C:/中进行搜索，并在下一步中使用命令中的Path。

检测您的keytool.exe路径，并进入dir/ in命令提示符，并在一行中运行此命令

$ keytool -exportcert -alias androiddebugkey -keystore "C:\Documents and Settings\Administrator.android\debug.keystore" | "C:\OpenSSL\bin\openssl" sha1 -binary |"C:\OpenSSL\bin\openssl" base64

它会要求输入密码，输入android 这是所有。你会得到一个key-hash

步骤1->在您的系统中打开CMD

步骤2->C:\程序文件\Java\jdk1.6.0_43\bin>

步骤3->keytool -list -v -keystore C:\Users\leon\.android\debug. exeKeystore -alias androiddebugkey -storepass android -keypass android

你得到SHA1值点击这个链接你转换你的SHA1值为哈希键

我100%肯定这个链接会帮助你

keytool -exportcert -alias androiddebugkey -keystore “C：\Users**Deepak**.android\debug.keystore” |“C：\Users\Deepak\ssl\bin\openssl” sha1 -binary |“C：\Users\Deepak\ssl\bin\openssl” base64

2上述命令的变化 1.Deepak===替换为您的系统用户名 2.C:\Users\Deepak\ssl===替换您的Open ssl路径

运行此命令并获得如下输出

C:\Users\Deepak>keytool -exportcert -alias androiddebugkey -keystore "C:\Users\D eepak.android \调试。keystore" | "C:\Users\Deepak\ssl\bin\openssl" sha1 -二进制 | "C:\Users\Deepak\ssl\bin\openssl" base64 输入keystore密码:****** ga0RGNY ******************=

你可以从https://console.developers.google.com/projectselector/apis/credentials上获得你所有的指纹 然后使用下面的Kotlin代码将其转换为keyhash:

fun main(args: Array<String>) {
    listOf("<your_production_sha1_fingerprint>",
            "<your_debug1_sha1_fingerprint>",
            "<your_debug2_sha1_fingerprint>")
            .map { it.split(":") }
            .map { it.map { it.toInt(16).toByte() }.toByteArray() }
            .map { String(Base64.getEncoder().encode(it)) }
            .forEach { println(it) }
}

这就是我如何获得我的:

private class SessionStatusCallback implements Session.StatusCallback {
        @Override
        public void call(Session session, SessionState state, Exception exception) {

            if (exception != null) {
                new AlertDialog.Builder(FriendActivity.this)
                        .setTitle(R.string.login_failed_dialog_title)
                        .setMessage(exception.getMessage())
                        .setPositiveButton(R.string.ok_button, null)
                        .show();
            }

因此，当您试图在没有密钥的情况下输入时，将会出现异常。Facebook在这个例外中加入了RIGHT键。你所要做的就是复制它。