Why is it almost all Android apps downloaded here don't work? They either say corrupt zip or problem parsing the package. Is it something I am doing wrong or what? It is very annoying.
I don't know how you try to install the programs or games. .apk-files are not for uncompressing nor zip-archives. Just download and put them onto your sdcard. Now go to the sdcard on your phone and click at the .apk. It should now install. Please not, that you have to set the check to install unknown apps into the security-options in your phone.
greetings
