Jetpack Compose Tutorials and Playground

🤓 Overview

Series of Tutorials to learn about Jetpack Compose, Material Widgets, State, Animation, and Navigation. Easy to search in code and in app. Each chapter module contains its own content in code. SearchBar can be used to search with a tag or description available for each tutorial.

Recommended section is under constructions for now, when finished it will get recommended tags using previous searches using a database, domain with ViewModel.

Tutorial	Preview
1-1 Column, Row, Box, Modifiers Create Row that adds elements in horizontal order, and Column that adds elements in vertical order. • Column • Row • Box • Modifier

1-2 Surface, Shape, Clickable Create and modify Surface to draw background for Composables, add click action to any composable. Set weight or offset modifiers. • Surface • Shape • Clickable

Material Widgets

Tutorial	Preview
2-1 Text Create Text component with different properties such as color, background, font weight, family, style, spacing and others • Text • Row • FontStyle • Annotated String Hyperlink

2-2 Button, IconButton, FAB, Chip Create button with text and/or with image, Floating Action Button or Chips. Modify properties of buttons including color, text, and click actions. • Button • IconButton • FloatingActionButton • Chip

2-3 TextField Create TextField component with regular style or outlined. Set error, colors, state, icons, and IME actions. • TextField • OutlinedTextField • IME • Phone format VisualTransformation • Regex

2-4 Image Create Image with image, vector resource or with Painter, set image and Content scales to fit, expand or shrink image. Change shape of Image or apply ColorFilter and PorterDuff modes. • Image • Canvas • Drawable • Bitmap

2-5 LazyColumn/Row/VerticalGrid Vertical, horizontal grid lists with LazyColumn, LazyRow and LazyVerticalGrid. Use contentPadding set paddings for lists, verticalArrangement or horizontalArrangement for padding between items, rememberLazyListState to manually scroll. • LazyColumn(Vertical RecyclerView) • LazyRow(Horizontal RecyclerView • LazyVerticalGrid(GridLayout) • StickyHeaders

2-6 TopAppbar & Tab TopAppbar with actions, overflow menus. Tabs with text only, image only and image+text with different background, divider, and indicators. • TopAppBar • Overflow menu • TabRow and Tab • Tab Indicator, Divider

2-7 BottomNavigation Bottom navigation bars allow movement between primary destinations in an app. BottomNavigation should contain multiple BottomNavigationItems, each representing a singular destination. • BottomNavigation • BottomNavigationItem

2-8 BottomAppBar A bottom app bar displays navigation and key actions at the bottom of screens. • BottomAppBar • Scaffold

2-9-1 Side Navigation A backdrop appears behind all other surfaces in an app, displaying contextual and actionable content. • Scaffold • Side Navigation • DrawerState

2-9-2 ModalDrawer Modal navigation drawers block interaction with the rest of an app’s content with a scrim. They are elevated above most of the app’s UI and don’t affect the screen’s layout grid. • ModalDrawer • DrawerState • Scaffold

2-10-1 BottomSheet Create bottom sheet using BottomSheetScaffold and rememberBottomSheetScaffoldState, create modal bottom sheets. • BottomSheetScaffold • BottomSheetState • ModalBottomSheetLayout

2-10-4 BottomDrawer BottomDrawer with BottomAppBar. • BottomDrawer • BottomAppBar • Scaffold

2-10-5 BackdropScaffold BackdropScaffold provides an API to put together several material components to construct your screen.

2-11 Snackbar, Progress, Selection Create Snackbars with various layouts and styling, Checkboxes with selectable text, tri state checkbox, grouped radio buttons and sliders. • SnackBar • ProgressIndicator • Checkbox • TriStateCheckbox • Switch • RadioButton • Slider • RangeSlider

2-12 Dialog, AlertDialog Create Dialog, and AlertDialog with standard and custom layouts. Implement on dismiss logic and get result when dialog is closed. • AlertDialog • Dialog • DialogProperties

Layout

Tutorial	Preview
3-1-1 Custom Modifier Create custom layout using using layout, Measurable, Constraint, Placeable. • Custom Modifier • Measurable • Constraint • Placeable

3-1-2 onGloballyPositioned Use Modifier.onGloballyPositioned to get position of a Composable in parent, root or window.br> • Modifier • onGloballyPositioned

3-1-3 graphicsLayer Use Modifier.offset{} and Modifier.graphicsLayer{} to scale, translate or change other properties of a Composable. • Modifier • graphicsLayer

3-1-4 BoxWithConstraints BoxWithConstraints is a composable that defines its own content according to the available space, based on the incoming constraints or the current LayoutDirection. • BoxWithConstraints • Constraint

3-1-6 Chaining Size Modifiers Observe how chaining Modifier.size.size, Modifier.sizeIn.size or Modifier.size.requiredSize or other combination of size modifiers effect final Constraints. • Modifier • size/sizeIn • requiredWidth/requiredHeight/requiredSize

3-1-7 Modifier.wrapContentSize Use Modifier.wrapContentSize/Width/Height to use content constraints instead of Constraints forced by parent. • Modifier • Custom Layout • Measurable

3-1-8 Modifier.layout Use Modifier.layout to create LayoutModifier to measure with Constraints and place Placeables based on which order Modifier.layout is assigned. • Modifier • Custom Layout • Measurable • Constraints • Placeable

3-2-1 Custom Layout Create custom layout using using MeasurePolicy and use intrinsic dimensions. • Custom Layout • Measurable • Constraint • Placeable

3-2-10 Constraints & Modifier.layout Constraints to measure measurables with Constraints.offset and Constraints.constrainWidth to limit maximum width or available space for Placeable. • Custom Layout • Measurable • Constraint • Placeable • Modifier.layout

3-3-1 Scope&ParentDataModifier Add custom modifiers to Composable inside a custom layout using its scope like align modifier only available in specific Composable like a custom Column. • Custom Layout • Scope • ParentDataModifier • Measurable • Constraint • Placeable

3-5 SubcomposeLayout Subcompose layout which allows to subcompose the actual content during the measuring stage for example to use the values calculated during the measurement as params for the composition of the children. • SubcomposeLayout • Constraint • Measurable • Constraint • Placeable

3-6-1 Custom Chat Layouts1 Custom layout like whatsapp chat layout that moves time and message read status layout right or bottom based on message width. • Custom Layout • Measurable • Constraint • Placeable

3-6-2 Custom Chat SubcomposeLayout Custom layout like whatsapp chat. Added quote and name tag resized to longest sibling using SubcomposeColumn from previous examples to have whole layout. • Custom Layout • SubcomposeLayout • Measurable • Constraint • Placeable

3-9 Visibility Percentage Detect percentage of visibility of a Composable using Modifier.onPlaced inside Column with vertical scroll or LazyColumn. • Modifier • LazyColumn • LazyListState • onPlaced

3-10 Center Item on Scroll Detect position in parent and center an item while its parent is scrolled. • Modifier • LazyColumn • onPlaced

State

Tutorial	Preview
4-1-1 Remember&MutableState Remember and mutableState effect recomposition and states. • remember • State • Recomposition

4-2-3 Scoped Recomposition How hierarchy of Composables effects Smart Composition. • remember • Recomposition • State

4-4 Custom Remember Create a custom remember and custom component to have badge that changes its shape based on properties set by custom rememberable. • remember • State • Recomposition • Custom Layout

4-5-1 SideEffect1 Use remember functions like rememberCoroutineScope, and rememberUpdatedState and side-effect functions such as LaunchedEffect and DisposableEffect. • remember • rememberCoroutineScope • rememberUpdatedState • LaunchedEffect • DisposableEffect

4-5-2 SideEffect2 Use SideEffect, derivedStateOf, produceState and snapshotFlow. • remember • SideEffect • derivedStateOf • produceStateOf • snapshotFlow

4-7-3 Compose Phases3 How deferring a state read changes which phases of frame(Composition, Layout, Draw) are called. • Modifier • Recomposition • Composition • Layout • Draw

4-11-6 LazyList Scroll Direction Detect scroll direction of a LazyColumn using LazyListStated. • Modifier • LazyColumn • LazyListState • derivedStateOf • snapshotFlow

Gesture

Tutorial	Preview
5-1-1 Clickable Use clickable modifier, Indication. Indication to clip ripples, or create custom ripple effects. • clickable • Indication • rememberRipple • pointerInput • pointerInteropFilter

5-1-2 InteractionSource1 Use Interaction source to collect interactions or change scale of Composables based on interaction state. • clickable • InteractionSource

5-1-3 InteractionSource2 Use InteractionSource to update touch state of multiple Composable or another Composable based on current interaction. • clickable • InteractionSource

5-2 Tap&Drag Gesture Use PointerInput to listen press, tap, long press, drag gestures. detectTapGestures is used for listening for tap, longPress, doubleTap, and press gestures. • pointerInput • pointerInteropFilter • detectTapGestures • detectDragGestures • onPress • onDoubleTap

5-3 Transform Gestures Use PointerInput to listen for detectTransformGesture to get centroid, pan, zoom and rotate params. • pointerInput • detectTransformGestures • centroid • pan • zoom

5-4-1 AwaitPointerEventScope1 Use AwaitPointerEventScope to get awaitFirstDown for down events, waitForUpOrCancellation for up events, and awaitPointerEvent for move events with pointers. • AwaitPointerEventScope • PointerInputChange • awaitFirstDown • waitForUpOrCancellation • awaitPointerEvent • awaitTouchSlopOrCancellation • awaitDragOrCancellation

5-4-3 Centroid, Zoom, Pan, Rotation Use AwaitPointerEventScope to calculate centroid position and size, zoom, pan, and rotation. • AwaitPointerEventScope • centroid • pan • zoom

5-6-2 Gesture Propagation1 Consume different type of touch events in Composable in an hierarchy to display gesture propagation between parent and children with MOVE gestures. • AwaitPointerEventScope • pointerInput • consume • consumePositionChange • anyChangeConsumed

5-6-4 Transform Propagation Consume events to rotate, zoom, move or apply drag or move events on Composables. • AwaitPointerEventScope • detectTransformGestures • consume • consumePositionChange • anyChangeConsumed • pan • zoom

5-9-6 Collapsing TopAppBar Create a collapsing TopAppBar using Modifier.nestedScroll and NestedScrollConnection. • nestedScroll • NestedScrollConnection

5-9-7 Collapsing TopAppBar2 Create a collapsing TopAppBar using Modifier.nestedScroll and NestedScrollConnection. • nestedScroll • NestedScrollConnection

5-10-1 Image Touch Detection Detect touch position on image and get color at touch position. • Image • AwaitPointerEventScope

5-11 Zoomable LazyColumn Zoom images inside a LazyColum. • Image • Zoom • AwaitPointerEventScope

Graphics

Tutorial	Preview
6-1-1 Canvas Basics 1 Use canvas draw basic shapes like line, circle, rectangle, and points with different attributes such as style, stroke cap, brush. • Canvas • DrawScope • Path • Path Effect

6-1-2 Canvas Basics 2 Use canvas to draw arc, with path effect, stroke cap, stroke join, miter and other attributes and draw images with src, dst attributes. • Canvas • DrawScope • Path • Path Effect

6-1-3 Canvas Paths Use canvas to draw path using absolute and relative positions, adding arc to path, drawing custom paths, progress, polygons, quads, and cubic. • Canvas • DrawScope • Path • Path Effect

6-1-4 Canvas Path Ops Use canvas to clip paths, or canvas using path, or rectangle with operations such as Difference, Intersect, Union, Xor, or ReverseDifference.. • Canvas • DrawScope • Path • PathOperation • ClipOperation

6-1-5 Canvas Path Segments Use canvas to flatten Android Path to path segments and display PathSegment start and/or end points. • Canvas • DrawScope • Path • PathSegment

6-1-6 Canvas PathEffect Use PathEffect such as dashedPathEffect, cornerPathEffect, chainPathEffect and stompedPathEffect to draw shapes add path effects around Composables • Canvas • DrawScope • Path • Path Effect

6-2-1 Blend(Porter-Duff) Modes Use blend(Porter-Duff) modes to change drawing source/destination or clip based on blend mode ,and manipulate pixels. • Canvas • DrawScope • Path • Path Effect • BlendMode

6-2-3 Multi-Color VectorDrawable Use blend(Porter-Duff) to create multi colored VectorDrawables or VectorDrawables with fill/empty animations • Canvas • DrawScope • VectorDrawable • BlendMode

6-4-2 Drawing App Draw to canvas using touch down, move and up events using array of paths to have erase, undo, redo actions and set properties for each path separately. • Canvas • DrawScope • Path • AwaitPointerEventScope • PointerInputChange • BlendMode

6-5 Color Picker Color Picker that calculates angle from center and gets a color using hue and returns a color as in HSL or RGB color model. • Canvas • DrawScope • Path • AwaitPointerEventScope • PointerInputChange • BlendMode

6-6 Scale/Translation Edit Editable Composable that changes position and scale when touched and dragged from handles or changes position when touched inside. • Canvas • DrawScope • Scale • Translate • AwaitPointerEventScope • PointerInputChange

6-7 Gooey Effect Create basic Gooey Effect with static circles and one with moves with touch. • Canvas • DrawScope • Gooey • Translate • AwaitPointerEventScope • PointerInputChange

6-8-1 Cutout Arc Shape Use Path.cubicTo, Path.arcTo to draw cutout shape. • Canvas • Path • Scale

6-9-1 Neon Glow Effect Use paint.asFrameworkPaint() to create blur effect to mimic neon glow and infinite animation to dim and glow infinitely. • Canvas • Path • Neon • AwaitPointerEventScope • PointerInputChange

6-11 Canvas Erase Percentage Use blend(Porter-Duff) modes with androidx.compose.ui.graphics.Canvas to erase and compare pixels with erased Bitmap to find ou percentage of erased area. • ActualCanvas • Path • AwaitPointerEventScope • PointerInputChange

6-12 Diagonal Price Tag Use Modifier.drawBehind and Modifier.composed to draw diagonal price tag with shimmer effect • TextMeasurer • Canvas • Composed • Brush • Image

6-13 Border Progress Use Path segments to create path with progress to display remaining time • Canvas • Path • PathSegment

6-14 Pie Chart Draw pie chart with dividers, and text between angles. • Canvas • Path • Animatable • TextMeasurer

6-15 Pie Chart with Touch Animation Animate Pie Chart on touch and get data of touched section. • Canvas • Path • Animatable • TextMeasurer • detectTapGestures

6-17 Animated Rainbow Border Draw animated rainbow color border using BlendMode.SrcIn and Modifier.drawWithCache • Canvas • Shape • BlendMode • Brush

6-20 PathParser and PathMeasure Create Path from string and animate segments via PathMeasure. • Canvas • Path • PathParser • PathMeasure • PathSegment • animateFloatAsState

6-21 Constant Velocity Animation Create constant time animation. • Canvas • animateOffsetAsState • animateValueAsState

6-23 Tab/Switch Animation Create a Tab/Switch with fluent blending text and shadow. • Canvas • BlendMode • animateDpAsState

6-24 Projection change with Lerp Animate projection of rotating circle between inner and outer projection with lerp function. • Canvas • rememberInfiniteTransition • animateFloatAsState

6-25 BeforeAfter Layout Create animatable BeforeAfter layout with Generic or BlendMode. • Generic Shape • BlendMode • rememberInfiniteTransition • animateFloatAsState

Stability, Skippable, Restartable

Add snippet below to app's gradle module

subprojects {
    tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
        kotlinOptions {
            if (project.findProperty("composeCompilerReports") == "true") {
                freeCompilerArgs += [
                        "-P",
                        "plugin:androidx.compose.compiler.plugins.kotlin:reportsDestination=" +
                                project.buildDir.absolutePath + "/compose_compiler"
                ]
            }
            if (project.findProperty("composeCompilerMetrics") == "true") {
                freeCompilerArgs += [
                        "-P",
                        "plugin:androidx.compose.compiler.plugins.kotlin:metricsDestination=" +
                                project.buildDir.absolutePath + "/compose_compiler"
                ]
            }
        }
    }
}

And run task to check for compiler reports for stability inside build/compiler_reports

./gradlew assembleRelease -PcomposeCompilerReports=true

Some of the answers i posted on Stackoverflow

Files

README.md

Latest commit

History

README.md

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Jetpack Compose Tutorials and Playground

🤓 Overview

1-1 Column, Row, Box, Modifiers

1-2 Surface, Shape, Clickable

Material Widgets

2-1 Text

2-2 Button, IconButton, FAB, Chip

2-3 TextField

2-4 Image

2-5 LazyColumn/Row/VerticalGrid

2-6 TopAppbar & Tab

2-7 BottomNavigation

2-8 BottomAppBar

2-9-1 Side Navigation

2-9-2 ModalDrawer

2-10-1 BottomSheet

2-10-4 BottomDrawer

2-10-5 BackdropScaffold

2-11 Snackbar, Progress, Selection

2-12 Dialog, AlertDialog

Layout

3-1-1 Custom Modifier

3-1-2 onGloballyPositioned

3-1-3 graphicsLayer

3-1-4 BoxWithConstraints

3-1-6 Chaining Size Modifiers

3-1-7 Modifier.wrapContentSize

3-1-8 Modifier.layout

3-2-1 Custom Layout

3-2-10 Constraints & Modifier.layout

3-3-1 Scope&ParentDataModifier

3-5 SubcomposeLayout

3-6-1 Custom Chat Layouts1

3-6-2 Custom Chat SubcomposeLayout

3-9 Visibility Percentage

3-10 Center Item on Scroll

State

4-1-1 Remember&MutableState

4-2-3 Scoped Recomposition

4-4 Custom Remember

4-5-1 SideEffect1

4-5-2 SideEffect2

4-7-3 Compose Phases3

4-11-6 LazyList Scroll Direction

Gesture

5-1-1 Clickable

5-1-2 InteractionSource1

5-1-3 InteractionSource2

5-2 Tap&Drag Gesture

5-3 Transform Gestures

5-4-1 AwaitPointerEventScope1

5-4-3 Centroid, Zoom, Pan, Rotation

5-6-2 Gesture Propagation1

5-6-4 Transform Propagation

5-9-6 Collapsing TopAppBar

5-9-7 Collapsing TopAppBar2

5-10-1 Image Touch Detection

5-11 Zoomable LazyColumn

Graphics

6-1-1 Canvas Basics 1

6-1-2 Canvas Basics 2

6-1-3 Canvas Paths

6-1-4 Canvas Path Ops

6-1-5 Canvas Path Segments

6-1-6 Canvas PathEffect

6-2-1 Blend(Porter-Duff) Modes

6-2-3 Multi-Color VectorDrawable

6-4-2 Drawing App

6-5 Color Picker

6-6 Scale/Translation Edit

6-7 Gooey Effect

6-8-1 Cutout Arc Shape

6-9-1 Neon Glow Effect

6-11 Canvas Erase Percentage