我应该在哪里放置数百张下载的图像？

Question

I want to include in my app hundreds of images. I understood that downloading an app that weighs hundreds of MB may deter some people, so I need to offer them a chance to download the images themselves. Also - the images would come only if you pay me, so there is no need for a big app.
Two questions:

1. I know you can have in google an expansion APK. How do I upload it? I can't see any option of it in the developers console.
2. Where should I put them? In what directory or how will I mange to show them? What will be the path ie new File([what?]) (If they will not be shown to the user its best, so please no downloading just to the SDCard).
BTW: Getting images from assets is really slow. I need them fast.

Answer 1

When you upload you APK on the developer console, there will be an option to also upload an APK expansion file.

The thing with the APK expansion files is that when the app is downloaded on the Play Store, if the device can download the expansion file, it's downloaded at the same time, otherwise it will download the APK only.

Google's advice is that you need to be able to download the expansion file(s) at runtime to deal with memory limitations on some devices. Google offers a library and well documented samples to help you with that.

To test that your APK expansion file(s) works well, you can publish your app to Beta testing on the Android developer console.

You should read carefully the APK expansion file documentation by Google. I tried it myself and I can tell it's very well explained. All you need to know is there.

Here's the link to the doc : http://developer.android.com/google/play/expansion-files.html