Delphixe 1 1apk signature is invalid. The installation failed due to the wrong choice during packaging. If direct running can be successful, debugging can also be done, but after packaging with signature, the installation fails. It turns out that you chose the wrong package. Originally, SignatureVersions could not only choose V2(FullAPKSignature), but should choose V 1(JarSignature) or V 1 and V2. V 1: The signature file can be modified appropriately and recompressed. V2: No modification can be made to the signed APK, including zipalign. Because it is a signature of bytes, any change will affect the final result.