Generate Random Color | Android Studio | Kotlin

Generate random color(s) in Android Studio IDE with Kotlin language

There may have some situations in which you need the feature to generate the random color.  For example, in a list of items if you want to give different colors to each item/row or you may have seen the WhatsApp Group Chat List, each person's name is of a different color. 

I'll do it using a button click. You can do it according to your requirements/needs.

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Code

Code Snippet

val rnd = Random()
val color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256))

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    tools:context=".MainActivity">

    <TextView
        style="@style/TextAppearance.Material3.HeadlineMedium"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp"
        android:text="Random Color Generator" />

    <View
        android:id="@+id/generatedColorView"
        android:layout_width="250dp"
        android:layout_height="250dp"
        android:layout_centerInParent="true"
        android:background="#959595" />

    <com.google.android.material.button.MaterialButton
        android:id="@+id/generateColorBtn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:minHeight="60dp"
        android:text="Generate Ranndom Color"
        app:cornerRadius="8dp" />

</RelativeLayout>

MainActivity.kt

package com.technifysoft.randomcolor

import android.graphics.Color
import android.os.Bundle
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import com.google.android.material.button.MaterialButton
import java.util.*

class MainActivity1 : AppCompatActivity() {

    //UI Views
    private lateinit var generatedColorView: View
    private lateinit var generateColorBtn: MaterialButton

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        //init UI Views
        generatedColorView = findViewById(R.id.generatedColorView)
        generateColorBtn = findViewById(R.id.generateColorBtn)

        //handle generateColorBtn click, generate random color
        generateColorBtn.setOnClickListener {
            //function call to generate random color
            generateRandomColor()
        }
    }

    private fun generateRandomColor() {
        //Generate Random Color
        val rnd = Random()
        val color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256))

        //set the randomly generated color as background color of a UI View. You may use it anywhere you want
        generatedColorView.setBackgroundColor(color)
    }

}

Output