Categories:

Layouts and Widgets
TextView EditText ImageView CheckBox CheckedTextView RadioButton Switch ToggleButton RatingBar SeekBar ProgressBar AutoCompleteTextView TextClock Chronometer (Stop clock example) Moving between fragments
AdapterViews
Spinner Simple ListView ListView with custom adapter for String list ListView with custom adapter for images HashMap and ArrayList<HashMap> ListView with custom BaseAdapter for displaying ArrayList<HashMap> Expandable ListView GridView GridView with image and text RecyclerView with GridLayoutManager as Fragment
Menu
OptionsMenu using XML resource OptionsMenu programmatically
Notifications
Android simple notification example
Code Snippets
Toast message Toast messages at different positions Simple Intent operations Copy file from assets to external cache Read a text file from assets Keyboard and screen code snippets Get thumbnail from video url
Dialog
Simple AlertDialog AlertDialog with Custom View DatePickerDialog TimePickerDialog Dialog with single choice String List BottomSheetDialog Example
Simple app examples
Flash screen example Custom Toast message Stopwatch app BMI calculator Age calculator using DatePickerDialog Gestational age calculator using DatePickerDialog Using DatePickerDialog and TimePickerDialog to pick date and time together Show fragments in ViewPager attached to TabLayout Camera example Immersive Mode Example Pick Image and display in ImageView Get file meta data from Uri Access files in app’s private storage.
Android canvas
Draw on canvas and create Views using canvas Plot numbers as line graph on canvas Detect touch events on canvas
Advanced app examples
Encrypt and decrypt text Google SignIn with FirebaseAuth in AIDE Pdf file to android app Pick and display a pdf file Pick and play an audio file Extract text from image using MLKIT Detect faces in image using MLKIT
ViewPager
Show fragments in ViewPager attached to TabLayout
Service examples
Bound Service Example Started Service Example Communicate with Bound Service Example Use MediaPlayer in Service