Android 签名证书

核心提示：compilation, the tools then use the debug key to sign the application .apk file. Because the password is known, the tools don't need to prompt you for the k

compilation, the tools then use the debug key to sign the application .apk file. Because the password is known, the tools don't need to prompt you for the keystore/key password each time you compile.

When your application is ready for release, you compile it in release signing mode. In release mode, the tools compile your .apk without signiing it. You must then use Keytool to generate your own keystore/key and then use the Jarsigner tool, also included in the JDK, to sign the .apk.

Basic Setup for Signing

To support the generation of a keystore and debug key, you should first make sure that Keytool is available to the SDK build tools. In most cases, you can tell the SDK build tools how to find Keytool by making sure that your JAVA_HOME environment variable is set and that it references a suitable JDK. Alternatively, you can add the JDK version of Keytool to your PATH variable.

If you are developing on a version of Linux that originally came with Gnu Compiler for Java, make sure that the system is using the JDK version of Keytool, rather than the gcj version. If Keytool is already in your PATH, it might be pointing to a symlink at /usr/bin/keytool. In this case, check the symlink target to make sure that it points to the Keytool in the JDK.

Signing in Eclipse/ADT

If you are developing in Eclipse and have set up Keytool as described above, signing in debug mode is enabled by default. When you run or debug your app, ADT signs the .apk for you and installs it on the emulator. No specific action on your part is needed, provided ADT has access to Keytool.

To compile your application in release mode, right-click the project in the Package pane and select Android Tools > Export Application Package. Alternatively, you can follow the "Exporting the unsigned .apk" link in the Manifest Editor overview page. After you have saved the exported .apk, you need