Hey there, let's walk through how to get your SHA-1 and SHA-256 fingerprints in Android Studio 4.2.1, especially addressing the issue of missing signing reports after upgrading. Here are a few reliable methods:

方法一：通过Gradle面板调出签名报告 #

If you can't find the signing report in the Gradle panel, it's likely just a navigation tweak in 4.2.1. Try these steps:

• First, ensure the Gradle tool window is visible. If not, go to the top menu bar and select View > Tool Windows > Gradle to bring it up (it's usually pinned to the right side of the IDE).
• Expand your project name in the Gradle panel, then drill down into Tasks > android.
• Look for the signingReport task under the android folder—double-click it to run.
• Once execution finishes, check the Run tab at the bottom of the IDE. You'll see the full output with SHA-1, SHA-256, and other fingerprints for all your build variants (debug, release, etc.).

方法二：直接用Terminal执行Gradle命令 #

If the Gradle panel route isn't working for you, using the terminal is a surefire alternative:

• Open the Terminal panel at the bottom of Android Studio.
• Run the appropriate command based on your OS:
  • For Windows: gradlew signingReport
  • For Mac/Linux: ./gradlew signingReport
• Hit enter, wait for the command to complete, and you'll see all your signing fingerprints printed directly in the terminal.

方法三：从密钥库文件直接提取（适合自定义签名） #

If you're using a custom keystore for release builds (or even want to check the default debug keystore), you can use the keytool command directly:

针对默认Debug密钥库 #

Android Studio creates a default debug keystore automatically. Its path varies by OS:

• Windows: C:\Users\[你的用户名]\.android\debug.keystore
• Mac: /Users/[你的用户名]/.android/debug.keystore
• Linux: /home/[你的用户名]/.android/debug.keystore

运行以下命令（替换路径为你的实际路径）：

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

默认别名是androiddebugkey，密钥库和别名的密码都是android。

针对自定义Release密钥库 #

替换占位符为你的密钥库详情：

keytool -list -v -keystore /path/to/your-release-keystore.jks -alias your-key-alias -storepass your-keystore-password -keypass your-key-password

执行后会输出你自定义签名密钥的所有指纹信息。

内容的提问来源于stack exchange，提问作者Leonard