Hello!
I have an Android cell phone which I recently bought, and I have installed so many applications. But then suddenly when I installed this one application I got an error . It won't allow me to do it. Is there any Android user out there who have experienced this? I really need your help on this.
"Installation error
Package file is invalid".
Go to Settings>>>> Applications>>>> All>>>> Market>>>>Clear data(and cache)
If you still face the same problem, then try to clean the cache with a file manager apps, root needed or you can restart the phone as it clears the logs automatically on  restart.
This is an error caused by too much cache from your Android apps. You can get this when you update your apps or when you don't clear your application cache often.
There are two options.
You must now remember to clear the cache and manage your apps as often as possible to avoid such errors in the future.
Good luck!
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That is not an error with your phone or with the Android app you are installing. That error happens if you try to install an Android app that is not compatible with your phone. This can happen if you downloaded the Android app or the APK file from a different website and not from the Google Play store.
When you download apps from the Google Play store, the site or Google Play ensures you are downloading the correct app that is compatible with your phone’s firmware. It may or may not display apps that are not compatible with your device. Downloading APK files from other websites are done by advanced users only who know what they are doing.
This can be dangerous because you don’t know if the app was modified and something unknown was inserted to it. Download and install APK files outside of the Google Play store only if you know what you are doing. Since you receive the error upon installing, check the page again where you downloaded it and check its compatibility requirements or the supported Android versions.
This can give you an idea why the error was triggered.
