How to create a swipe refresh layout in Android using Kotlin?

AndroidMobile DevelopmentApps/ApplicationsKotlin

This example demonstrates how to create a swipe refresh layout in Android using 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">
   <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
      android:id="@+id/swipe"
      android:layout_width="match_parent"
      android:layout_height="match_parent">
   <TextView
      android:id="@+id/textView"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:gravity="center"
      android:text="Swipe to Reload"
      android:textColor="@android:color/background_dark"
      android:textSize="24sp"
      android:textStyle="bold" />
   </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
</RelativeLayout>

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

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.os.Handler
import android.widget.TextView
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
class MainActivity : AppCompatActivity() {
   lateinit var swipeRefreshLayout: SwipeRefreshLayout
   lateinit var textView: TextView
   var number: Int = 0
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      swipeRefreshLayout = findViewById(R.id.swipe)
      textView = findViewById(R.id.textView)
      swipeRefreshLayout.setOnRefreshListener {
         number++
         textView.text = " Total number = $number"
         Handler().postDelayed(Runnable {
            swipeRefreshLayout.isRefreshing = false
         }, 4000)
      }
   }
}

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="com.example.q11">
   <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 Play 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.

raja
Published on 30-Sep-2020 12:35:51
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