With apktool, you can unpack and repackage packages without reporting any errors. After the completed apk package is re-signed, it will be sent to your mobile phone, and click the installation prompt "Explain the error". 1: repackage with WINRAR and select "Save".

2. Re-sign the contract. Before signing, delete the old signature archive, that is, delete all files except the list. MF in META-INF directory.

3.WinXP should install version 2.0 or higher. NET, and WIN7 can go directly to the next step.

4. Download signature software and search more.

5. Install JAVA, otherwise when running the signature software, it will directly prompt that the signature is successful but there is no file.