Rip Android games sprites!

[Google]

Now, I finally knew how to extract resources from Android games, it is easy and simple! There are three methods:
1. Apk/App without obb data
Go to Play Store and download "APK extractor" and then extract the app you want...
And then, go to your File manager! (I recommend ES File explorer) and go to your apk file!
Rename from .apk to .zip and you're done
2. Extracting from obb file!
Go to (Android-->obb-->*com.gamefile....*)
And rename the file from .obb to .zip and you can extract the resource and you're done! (Again?)
3. File game
Go to Android file and find your game data and you're done, lol xD
But beware! Some games won't work with this! Well, that's it, hope you like it

Regarding method 2, some of the resource that gets extracted from obb this way isn't readable, like png or jpg. Any idea as to why? I made a post going into more details, you can go to my profile, its the only thread I made. But I have been at this for hours, and is now desperate enough to make thread and call out for help.