Android Jetpack Compose

This repository contains educational code snippets for Android Jetpack Compose.

Rows, Columns & Basic Sizing

• Column: Use the Column composable to create a vertical layout. Items are arranged from top to bottom.

• Row: Use the Row composable to create a horizontal layout. Items are arranged from left to right.

• Sizing: Adjust the size of components using sizing properties like width, height, and weight.

Modifiers

• Modifiers are used to change the behavior, appearance, and layout of components.

• Customize your components using sizing, layout, appearance, and animation modifiers.

Creating an Image Card Composable

An image card component typically consists of the following elements:

• Image: The main focal point of the card, usually a visual representation.
• Title: A title associated with the image.
• Description: A brief description providing context about the image.

This component combines these elements to present the image along with relevant text to the user.

Styling Text

The "Styling Text" section explains how to format text in Jetpack Compose.

• We utilize the Text component to achieve this.

• This component offers a range of properties that allow us to customize text with attributes such as color, size, font, weight, style, alignment and decoration.

State

State is a fundamental concept in Jetpack Compose that represents the current snapshot of data in your UI.

• In Jetpack Compose, UI components are driven by state, and any change in state triggers a recomposition of the UI, updating it to reflect the new state.

• In Compose, state can be represented using the remember and mutableStateOf functions. remember is used to create a stable reference to an object that survives recompositions, while mutableStateOf is used to create a state holder that can be updated.

Textfields

• Textfields are components that allow users to input text. In Jetpack Compose, textfields are represented by the TextField composable. The TextField composable is used to collect text input from users and dynamically update the input field.

Buttons

• Buttons are components that allow users to initiate a specific action. In Jetpack Compose, buttons are represented by the Button composable. The Button composable waits for user clicks and listens for click events.

Displaying Snackbars

• Snackbars are components used to display temporary notifications to users. In Jetpack Compose, snackbars are displayed using the SnackbarHost and Snackbar composable.

Lists

Lists are commonly used to display a collection of items in a scrollable vertical layout. In Jetpack Compose, lists are represented using the LazyColumn composable for vertically scrolling lists and the LazyRow composable for horizontally scrolling lists.

Vertical Lists

Vertical lists, represented by the LazyColumn composable, are used to display items in a vertical arrangement that can be scrolled vertically.

Horizontal Lists

Horizontal lists, represented by the LazyRow composable, are used to display items in a horizontal arrangement that can be scrolled horizontally.

ConstraintLayout

ConstraintLayout is a flexible layout manager that allows you to create complex layouts with a flat view hierarchy. In Jetpack Compose, ConstraintLayout is represented using the ConstraintLayout composable.

• To use ConstraintLayout, you need to add the ConstraintLayout dependency to your project. implementation("androidx.constraintlayout:constraintlayout-compose:1.0.1")

• Then, you can create a ConstraintLayout and define constraints to position and size its children.

• ConstraintLayout in Jetpack Compose supports many advanced features, including chains, bias, barriers, groups, and more. These features allow you to create even more complex and responsive layouts.

Simple Animations

• Animations are essential for creating dynamic and engaging user interfaces. Jetpack Compose provides simple and powerful tools for adding animations to your UI.

Transition Animations

Transition animations are used to animate changes between different states of a UI element. In Jetpack Compose, transition animations can be achieved using the animate*AsState functions combined with modifiers like Modifier.animateContentSize or Modifier.offset.

Value-based Animations

Value-based animations animate changes to a numeric value over time. In Jetpack Compose, value-based animations can be achieved using the animateValueAsState function.

• Jetpack Compose simplifies the process of adding animations to your UI, allowing you to create dynamic and visually appealing user experiences with ease.

You can also check out this article: Jetpack Compose.

For more information, refer to the official Compose documentation.

Additionally, if you prefer video tutorials, you can explore theAndroid Jetpack Compose Tutorial Playlist on Youtube.