1. AndroZoo
2. Android. 2020 a. The 20 Most Popular Android Apps in the Google Play Store. https://developer.android.com/reference/android/app/Activity . Android. 2020 a. The 20 Most Popular Android Apps in the Google Play Store. https://developer.android.com/reference/android/app/Activity .
3. Android. 2020 b. MotionEvent Android Developers. https://developer.android.com/reference/android/view/MotionEvent. Android. 2020 b. MotionEvent Android Developers. https://developer.android.com/reference/android/view/MotionEvent.
4. Android. 2020 c. MotionEvent.obtain Android Developers. https://developer.android.com/reference/android/view/MotionEvent#obtain(long long int float float int). Android. 2020 c. MotionEvent.obtain Android Developers. https://developer.android.com/reference/android/view/MotionEvent#obtain(long long int float float int).
5. Apkpure. 2020. Download APK free online downloader. https://apkpure.com/. Apkpure. 2020. Download APK free online downloader. https://apkpure.com/.