Use Snackbar in Android with Kotlin

This example demonstrates how to use Snackbar in Android Kotlin.

Step 1 − Create a new project in Android Studio, go to File ? New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
   <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="50dp"
      android:text="Tutorials Point"
      android:textAlignment="center"
      android:textColor="@android:color/holo_green_dark"
      android:textSize="32sp"
      android:textStyle="bold" />
   <TextView
      android:id="@+id/textView"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerInParent="true"
      android:text="Click the button to display snackBar"
      android:textColor="@android:color/background_dark"
      android:textSize="24sp"
      android:textStyle="bold|italic" />
   <Button
      android:id="@+id/btnSnackBar"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_below="@id/textView"
      android:layout_centerInParent="true"
      android:layout_marginTop="10dp"
      android:text="Tap To Display SnackBar"
      android:textColor="@android:color/background_dark" />
</RelativeLayout>

Step 3 − Add the following code to src/MainActivity.kt

import android.graphics.Color
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.TextView
import com.google.android.material.snackbar.Snackbar
class MainActivity : AppCompatActivity() {
   lateinit var button: Button
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      button = findViewById(R.id.btnSnackBar)
      button.setOnClickListener {
         val snackBar = Snackbar.make(
            it, "Replace with your own action",
            Snackbar.LENGTH_LONG
         ).setAction("Action", null)
         snackBar.setActionTextColor(Color.BLUE)
         val snackBarView = snackBar.view
         snackBarView.setBackgroundColor(Color.CYAN)
         val textView = snackBarView.findViewById(com.google.android.material.R.id.snackbar_text) as TextView
         textView.setTextColor(Color.BLUE)
         snackBar.show()
      }
   }
}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="app.com.kotlipapp">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

Click here to download the project code.