I made an android sms app in which I am sending and receiving sms as android messaging app does so. Now I have set my target to 4.4 (Android KitKat version) but Android KitK
If you don't implement all the four requirements, your app won't be listed as a default SMS app. Even if your app doesn't support MMS you've to add those to your manifiest file. It doesn't mean you've to implement activities or services or receivers for them. Add these to your manifiest file and should get your SMS listed as a default SMS app. Feel free to ignore any lint errors.