With the APK Viewer or Package Viewer app you can see the contents of an APK file and store them. In your external folder or in the cloud. The contents of the Package are displayed inside a custom easy to use file browser. You can extract both the images as well as the code files, and analyze them later if they have any security risks.
Download the installation package of APK Viewer 2.0 that is provided for free and check out users' reviews on Droid Informer. The app is designed for Android 4.0 and higher. This application is completely safe for downloading. Coju.mobi is the developer of the tool which can be found in the Productivity category.