Signature conflict means that when installing an application, the system finds that there are already applications with the same package name but different signatures, which leads to the failure of installation and brings trouble to users. The following are several common ways to resolve signature conflicts:

1. uninstall conflicting applications: find the conflicting applications in the application management or settings menu, and then select uninstall.

2. Change the application package name: find the package attribute in the AndroidManifest.xml file, change it to the package name of the application that does not duplicate conflicts, and then recompile and install the application.

3. Use a different signature file: generate a new signature file, and then use Android tools (such as apksigner) to re-sign the application.

4. Use a different keystore: generate a new keystore file and re-sign the application with the keytool tool tool.

5. Contact the application developer: report the problem to the developer and ask to solve the signature conflict.

Each method has its own applicable conditions and precautions, so when trying to solve the signature conflict, we should choose the appropriate method according to the specific situation.