Look up Permissions using the APK:

aapt d badging file.apk | grep perm

For CTL, you can run specific tests by passing --test-targets

Use TimeUnit to calculate days difference. Avoid the Android one.

If you have too many item types in Adapter, use Delegate Adapter

[Adapter Delegates] (http://hannesdorfmann.com/android/adapter-delegates)

In Android Studio, dragging a folder with subfolders named xhdpi, xxhdpi, etc will automatically place images into the right folder.