使用android studio内嵌Java jre的位置，对于windows用户下面的截图可能有助于找到SHA1

如果你没有Keystore和别名，你可以使用这个命令:

keytool -list -printcert -jarfile app.apk

跟随本教程为谷歌Map v2创建SHA1指纹

调试模式:

keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android 

释放模式:

keytool -list -v -keystore {keystore_name} -alias {alias_name}

例子:

keytool -list -v -keystore C:\Users\MG\Desktop\test.jks -alias test

在windows下，当keytool命令找不到时，转到您安装的JDK目录，例如<YourJDKPath>\Java\jdk1.8.0_231\bin\，打开命令行，尝试上述命令进行调试/发布模式。

获得SHA1或SHA-256的另一种方式使用./gradlew signingReport

欲了解更多详细信息，请访问 使用Gradle的签名报告

右边Gradle—>签名项目获得所有密钥

首先有一个与fb-sdk android-support-v4.jar相同的.jar文件。 然后使用以下命令生成SHA1密钥:

PackageInfo info;
try {

    info = getPackageManager().getPackageInfo(
        "com.example.worldmission", 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));
        Log.e("Hash key", something);
        System.out.println("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());
}

如果你使用React Native，调试。Keystore在android/app中，但可能不在~/.android中。

设置调试。Keystore路径如下:

keytool -list -v -keystore {PROJECT_ROOT}/android/app/debug.keystore -alias androiddebugkey -storepass android -keypass android

控制台将打印如下内容:

Alias name: androiddebugkey
Creation date: Jan 1, 2014
Entry type: PrivateKeyEntry
Certificate chain length: 1
Certificate[1]:
Owner: CN=Android Debug, OU=Android, O=Unknown, L=Unknown, ST=Unknown, C=US
Issuer: CN=Android Debug, OU=Android, O=Unknown, L=Unknown, ST=Unknown, C=US
Serial number: 2==Serial Number==2
Valid from: Wed Jan 01 06:35:04 CST 2014 until: Wed May 01 06:35:04 CST 2052
Certificate fingerprints:
     SHA1: 5E:=========== SHA1 SIGNING KEY ===========:25
     SHA256: FA:============ SHA 256 ===================9C
Signature algorithm name: SHA1withRSA
Subject Public Key Algorithm: 2048-bit RSA key
Version: 3