无法安装旧版本的APK Google Container Manager 5.1原因它说文件已损坏或文件存在于相同的名称中......解决方案在于提供旧版本的Google帐户管理器5.1与已有相同的密钥签名谷歌客户经理7.1 ....如何使用Lucky Patcher更改签名？
Can't install old version of apk Google account manager 5.1 cause it says file is corrupt or file exists under same name...solution lies in giving the old version of Google account manager 5.1 the same key signature as the already been Google account manager 7.1....how do I change the signature using lucky patcher?
how do I change the signature using lucky patcher?
You can't. Apps on Android are signed using a private key. The signature is computed from the private key and the contents of the APK file. You can't copy a signature from one app to another: if you could, there would be no point having a signature.
To make the signatures match, the same person who built the APK file you already have installed must build the new APK file, and sign it using the same private key. In your case, that's probably the author of the custom ROM. That's the process the SO question you linked is talking about.