Code of android

1. User Interaction in Android
Basic Views, Menus, Lists and Dialogs

2. Basic Input Views
• TextView – Displays text
• EditText – Takes user input
• Button – Triggers actions
• ImageButton – Button with image

3. Selection Controls
• CheckBox – Multiple selection
• RadioGroup – Group of RadioButtons
• RadioButton – Single selection
• ToggleButton(Switch) – ON / OFF state

4. Progress and Rating Views
• ProgressBar – Shows progress or loading
• RatingBar – Allows rating input

5. Menus in Android
• Option Menu – App bar menu
• Context Menu – Appears on long press
• Popup Menu – Anchored floating menu

6. List and Recycler Views
• ListView – Simple vertical list
• GridView – Items in grid layout
• RecyclerView – Efficient and flexible list

7. Dialogs in Android
• Alert Dialog – Alerts and confirmations
• Progress Dialog – Loading dialog
• List Dialog – Displays list items
• DatePicker Dialog – Select date