1)创建一个密钥来签署您的应用程序，并记住别名。 2)安装OpenSSL。 3)将OpenSSL的bin文件夹放在您的路径中。 4)按照FB-Android-SDK页面上“设置单点登录”中提到的步骤，生成您的哈希密钥。确保您输入了正确的别名和密钥库文件名。 5)在facebook上创建一个应用程序，在移动设备选项卡下，输入这个哈希密钥。

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import android.os.Bundle;
import android.app.Activity;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.Signature;
import android.text.Editable;
import android.util.Base64;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {

    Button btn;
    EditText et;
    PackageInfo info;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn=(Button)findViewById(R.id.button1);
        et=(EditText)findViewById(R.id.editText1);
        btn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                try {
                    info = getPackageManager().getPackageInfo("com.example.id", 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()));
                        et.setText("" + something);
                        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());
                }
            }
        });
    }



}

Linux

开放式终端:

用于调试构建

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

你会发现debug。Keystore来自”。Android "文件夹复制并粘贴在桌面上，并运行上述命令

发布版本

keytool -exportcert -alias <aliasName> -keystore <keystoreFilePath> | openssl sha1 -binary | openssl base64

注意:确保在这两种情况下，它必须要求密码。如果它不要求输入密码，则意味着命令中有错误。

Simply Open you Main Activity File and create below mention function: try { PackageInfo info = getPackageManager().getPackageInfo( "your.application.package.name", 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 (PackageManager.NameNotFoundException e) { } catch (NoSuchAlgorithmException e) { }

1.1运行你的应用程序，这将为你的应用程序生成一个哈希键。

现在，打开日志猫和搜索“KeyHash”和复制哈希键。 一旦你生成了哈希键，你可以删除这个函数。

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。