How to get a list of installed Android applications in Kotlin?

Kotlin Apps/ApplicationsMobile Development

This example demonstrates how to get a list of installed Android applications in 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.

Example

<?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"
   android:padding="4dp"
   tools:context=".MainActivity">
   <ListView
      android:id="@+id/listView"
      android:layout_width="match_parent"
      android:layout_height="match_parent" />
</RelativeLayout>

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

Example

import android.content.pm.ApplicationInfo
import android.os.Bundle
import android.util.Log
import android.widget.ArrayAdapter
import android.widget.ListView
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
   lateinit var listView: ListView
   var arrayAdapter: ArrayAdapter<*>? = null
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      listView = findViewById(R.id.listView)
      installedApps()
   }
   private fun installedApps() {
      val list = packageManager.getInstalledPackages(0)
      for (i in list.indices) {
         val packageInfo = list[i]
         if (packageInfo!!.applicationInfo.flags and ApplicationInfo.FLAG_SYSTEM == 0) {
            val appName = packageInfo.applicationInfo.loadLabel(packageManager).toString()
            Log.e("App List$i", appName)
            arrayAdapter = ArrayAdapter(this,
            R.layout.support_simple_spinner_dropdown_item, list as List)
            listView.adapter = arrayAdapter
         }
      }
   }
}

Step 4 − Add the following code to androidManifest.xml

Example

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.myapplication">
   <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

raja
Published on 23-May-2020 14:37:42
Advertisements