What should I do if the restore program seems to be invalid after decompressing the apk? The APK needs to be decompiled using specialized software. Once decompressed, it cannot be compressed back again.

First decompile, and then select the folder to recompile after modification. After compiling, you still need to sign the apk package.

It should be noted that the modified apk cannot be saved with the original installed APK, nor can it be overwritten. You can only delete the originally installed program and then install the modified apk.

Similar software includes apktool, apk+deb, etc.

Requires a java operating environment. A certain Java language foundation is required.