Java 未验证密钥哈希以使用facebook sdk登录

我想使用facebook sdk。我在fb开发者控制台中创建了一个应用程序，还使用

 C:\Program Files (x86)\Java\jre1.8.0_131\bin>keytool -exportcert -alias androiddebugkey -keystore C:\Users\siddhi jambhale\.android\debug.keystore | "C:\Program Files (x86)\openssl-0.9.8k_X64\bin\openssl.exe" sha1 -binary | "C:\Program Files (x86)\openssl-0.9.8k_X64\bin\openssl.exe" base64



Illegal option:  jambhale\.android\debug.keystore

keytool -exportcert [OPTION]...

Exports certificate

Options:

 -rfc                            output in RFC style
 -alias <alias>                  alias name of the entry to process
 -file <filename>                output file name
 -keystore <keystore>            keystore name
 -storepass <arg>                keystore password
 -storetype <storetype>          keystore type
 -providername <providername>    provider name
 -providerclass <providerclass>  provider class name
 -providerarg <arg>              provider argument
 -providerpath <pathlist>        provider classpath
 -v                              verbose output
 -protected                      password through protected mechanism

Use "keytool -help" for all available commands
2jmj7l5rSw0yVb/hgfgfr/YBwk=

X41I3UCY/KBVDOFRERFWS0=

我得到这个错误，错误中显示的密钥与我从cmd获得的密钥不同，它存储在fb开发者控制台中

怎么办

---

请帮忙。谢谢..

在您的活动之一中运行此代码

try {
            PackageInfo info = getPackageManager().getPackageInfo(
                    "YOUR_PACAKGE_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 (NameNotFoundException e) {

        } catch (NoSuchAlgorithmException e) {

        }

---

它将为您提供keyHash并将该keyHash添加到您的Facebook A/C中。

尝试在两个catch块中打印e.printStackTrace。出现一些错误。请检查。好的，这是可行的，但您能否解释一下此哈希键在Facebook中的工作原理？为什么cmd中的哈希键不起作用？

try {
            PackageInfo info = getPackageManager().getPackageInfo(
                    "YOUR_PACAKGE_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 (NameNotFoundException e) {

        } catch (NoSuchAlgorithmException e) {

        }