[EDIT 2020]->现在我完全推荐这里的答案，使用android studio更容易，更快，不需要写任何代码-下面这个是在eclipse时代的:)-。

您可以在任何活动中使用此代码。它将在logcat中记录hashkey，这是调试键。这很简单，而且比使用SSL轻松。

PackageInfo info;
try {
    info = getPackageManager().getPackageInfo("com.you.name", PackageManager.GET_SIGNATURES);
    for (Signature signature : info.signatures) {
        MessageDigest md;
        md = MessageDigest.getInstance("SHA");
        md.update(signature.toByteArray());
        String something = new String(Base64.encode(md.digest(), 0));
        //String something = new String(Base64.encodeBytes(md.digest()));
        Log.e("hash key", something);
    }
} catch (NameNotFoundException e1) {
    Log.e("name not found", e1.toString());
} catch (NoSuchAlgorithmException e) {
    Log.e("no such an algorithm", e.toString());
} catch (Exception e) {
    Log.e("exception", e.toString());
}

你可以在知道密钥后删除代码;)

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。

使用它在kotlin中打印键哈希

try {
        val info = context.getPackageManager().getPackageInfo(context.packageName,
                PackageManager.GET_SIGNATURES);
        for (signature in info.signatures) {
            val md = MessageDigest.getInstance("SHA")
            md.update(signature.toByteArray())
            Log.d("Key hash ", android.util.Base64.encodeToString(md.digest(), android.util.Base64.DEFAULT))
        }
    }catch (e:Exception){

    }

这是Facebook官方页面上给出的内容:

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

让我把这个命令分解成几个片段。

Look for "keytool.exe". You can search that on the C: drive. You can find it in "java jdk" or "java jre". If you have installed multiple versions, choose any. Open a CMD prompt and go to the above directory where you found "keytool.exe". Clip the "exe`" and paste the above command provided on the Facebook page. You will get an error on entering this that OpenSSL is not recognized as in input output command. Solution : Download "Openssl" from OpenSSL (if you have a 64-bit machine you must download openssl-0.9.8e X64). Extract and save it anywhere... I saved it on the C: drive in the OpenSSl folder Replace the openssl in the above command in which you was getting an error of OpenSSL with "C:\OpenSSL\bin\openssl" at both the places after the pipe, "|". If prompted for a password, enter android.

你会得到你的哈希键。要了解进一步的步骤，请再次参考Facebook页面。

[EDIT 2020]->现在我完全推荐这里的答案，使用android studio更容易，更快，不需要写任何代码-下面这个是在eclipse时代的:)-。

您可以在任何活动中使用此代码。它将在logcat中记录hashkey，这是调试键。这很简单，而且比使用SSL轻松。

PackageInfo info;
try {
    info = getPackageManager().getPackageInfo("com.you.name", PackageManager.GET_SIGNATURES);
    for (Signature signature : info.signatures) {
        MessageDigest md;
        md = MessageDigest.getInstance("SHA");
        md.update(signature.toByteArray());
        String something = new String(Base64.encode(md.digest(), 0));
        //String something = new String(Base64.encodeBytes(md.digest()));
        Log.e("hash key", something);
    }
} catch (NameNotFoundException e1) {
    Log.e("name not found", e1.toString());
} catch (NoSuchAlgorithmException e) {
    Log.e("no such an algorithm", e.toString());
} catch (Exception e) {
    Log.e("exception", e.toString());
}

你可以在知道密钥后删除代码;)

我只是为这个确切的目的做了一个工具，即https://keyhash.vaibhavpandey.com/。它比其他任何方法都简单，因为它需要您浏览计算机上的密钥存储库，并输入密码，分别为谷歌和Facebook生成SHA-1十六进制和Base64版本。

不必担心密钥库或密码短语，因为工作完全是在浏览器中完成的，您可以检查网络选项卡，该工具也是开源的https://github.com/vaibhavpandeyvpz/keyhash。