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.
package com.geeksforgeeks.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.