Color Gradient in Android using Jetpack Compose
In computer graphics, a color gradient specifies a range of position-dependent colors, usually used to fill a region. More than one color is displayed in a gradient where there is a color transition between any two colors. Most commonly, this transition could be vertical, horizontal, or radial. In this article, we will show you how you could create different Color Gradients in Android using Jetpack Compose. Follow the below steps once the IDE is ready.
Step by Step Implementation
Step 1: Create a New Project in Android Studio
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. While choosing the template, select Empty Compose Activity. If you do not find this template, try upgrading the Android Studio to the latest version. We demonstrated the application in Kotlin, so make sure you select Kotlin as the primary language while creating a New Project.
Step 2: Working with the MainActivity.kt file
Go to the MainActivity.kt file and refer to the following code. Below is the code for the MainActivity.kt file. Comments are added inside the code to understand the code in more detail.
Kotlin
package com.w3wiki.jccolorgradient import android.os.Bundle import androidx.activity.ComponentActivity import androidx.activity.compose.setContent import androidx.compose.foundation.background import androidx.compose.foundation.layout.* import androidx.compose.material.* import androidx.compose.ui.Alignment import androidx.compose.ui.Modifier import androidx.compose.ui.graphics.Brush import androidx.compose.ui.graphics.Color import androidx.compose.ui.unit.dp import androidx.compose.ui.unit.sp class MainActivity : ComponentActivity() { override fun onCreate(savedInstanceState: Bundle?) { super .onCreate(savedInstanceState) setContent { // Creating a Simple Scaffold // Layout for the application Scaffold( // Creating a Top Bar topBar = { TopAppBar(title = { Text( "GFG | Gradient Color Example" , color = Color.White) }, backgroundColor = Color( 0xff0f9d58 )) }, // Creating Content content = { // Creating a Column Layout Column(Modifier.fillMaxSize(), horizontalAlignment = Alignment.CenterHorizontally, verticalArrangement = Arrangement.Center) { // Declaring 2 Colors val colorGreen = Color.Green val colorRed = Color.Red // Creating a Horizontal Gradient Color val gradientGreenRed = Brush.horizontalGradient(0f to colorGreen, 1000f to colorRed) // Creating a sample Row and setting is // background with above Gradient Color Row( Modifier .fillMaxWidth() .height( 100 .dp) .background(gradientGreenRed)) { Text(text = "Horizontal Gradient Green to Red" , fontSize = 20 .sp) } // Adding a Space of height 100dp Spacer(modifier = Modifier.height( 100 .dp)) // Declaring 2 Colors val colorGray = Color.Gray val colorWhite = Color.White // Creating a Vertical Gradient Color val gradientGrayWhite = Brush.verticalGradient(0f to colorGray, 1000f to colorWhite) // Creating a sample Row and setting is // background with above Gradient Color Row( Modifier .fillMaxWidth() .height( 100 .dp) .background(gradientGrayWhite)) { Text(text = "Vertical Gradient Gray to White" , fontSize = 20 .sp) } // Adding a Space of height 100dp Spacer(modifier = Modifier.height( 100 .dp)) // Declaring 4 Colors val colorCyan = Color.Cyan val colorBlack = Color.Black val colorBlue = Color.Blue val colorMagenta = Color.Magenta // Creating a Radial Gradient Color val gradientRadial = Brush.radialGradient(listOf(colorCyan, colorBlack, colorBlue, colorMagenta)) // Creating a sample Row and setting is // background with above Gradient Color Row( Modifier .fillMaxWidth() .height( 100 .dp) .background(gradientRadial)) { Text(text = "Radial Gradient" , fontSize = 20 .sp) } } } ) } } } |
Output:
You can see that we have created horizontal, vertical, and radial color gradients as shown below.