Create README.md

Author: addy-zero

Android/Android Apps/ToDoList/README.md

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+## To-Do Android App
+> A To-Do List app for devices running Android 5.0+
+
+### Screenshots
+<img src="https://user-images.githubusercontent.com/42904676/95720737-41e02f80-0c8f-11eb-9efd-97c1e7a85d2e.png" width="280px"><img src="https://user-images.githubusercontent.com/42904676/95720876-6f2cdd80-0c8f-11eb-9a2a-5203d4695532.png" width="280px">
+
+### Setup
+1. Fork and clone this repo to your PC.
+1. Open the project in Android Studio.
+1. Build an APK and copy it over to your Android device.
+1. Install and add your To-Do tasks!
+
+> Please make sure to save your To-Do tasks by hitting the **Done** key on your on-screen keyboard!
+
+### Concepts Learned
+* RecyclerView *-> To display the list of ToDos*
+* ViewHolders *-> To implement multi-select*
+* AdapterDataObserver *-> To display the welcoming message*
+* ContextualActionMode *-> To implement deletion*
+* Drawable Selector *-> To provide visual cues to the User*
+* Room Database *-> To store data*
+
+> If you are looking for details, the source code has been thoroughly documented.
+
+### Resources Used
+* [Official Android API Reference](https://developer.android.com/reference)
+* [Android GitBook](https://google-developer-training.github.io/android-developer-fundamentals-course-concepts-v2/index.html)
+* [Stack Overflow](https://stackoverflow.com/)
+
+### Future Aspects / Scope
+1. UI Overhaul
+1. Launcher icon
+1. Undetected bug fixes
+1. Persist orientation changes
+1. Dark mode
+1. Testers