Android Jetpack Compose - Creating a Color Picker Using Material 3 Slider Component

In this article, we'll explore how to create a color picker using Jetpack Compose, leveraging Material 3 Slider components. A color is essentially a combination of different amounts of red, green, blue, and alpha values, and we'll manage these values using sliders in our color picker UI. A sample video is given below to get an idea about what we are going to do in this article.

Prerequisites:

Before diving into the tutorial, make sure you have a

1. Basic Understanding of Jetpack Compose,
2. The latest version of Android Studio installed and
3. A Jetpack Compose project setup.

Step by Step Implementation

Step 1: Create a new project

To create a new project in the Android Studio, please refer to How to Create a new Project in Android Studio with Jetpack Compose.

Step 2: Creating the Color Picker Composable

We'll create a composable function named ColorPicker to encapsulate our color picker UI. This function will include sliders for adjusting the RGBA values and will display the current color in a box and the ARGB hex code in a Text composable.

Step 3: Creating the ColorSlider Composable

Next, we'll define a composable function named `ColorSlider` to create individual sliders for adjusting the RGBA values. This function will take a label, a mutable state for the slider value, and a color for the slider's active track.

Step 4: Adding Utility Functions

We'll also include an extension function `toColorInt()` to convert float values to integer color components.

Step 5: Entire code for MainActivity.kt

Here's the entire code for MainActivity.kt. We can use the ColorPicker Composable in the MainActivity or other composables.

MainActivity.kt:

Output:

Conclusion

In this tutorial, we've learned how to create a color picker using Jetpack Compose and Material 3 Slider components. By adjusting the RGBA values with sliders, users can easily select their desired colors.