In this article, we are going to show the list of all the installed apps on your Android phone. So here we are going to learn how to implement that feature in three different ways. Note that we are going to implement this project in both Java and Kotlin Programming languages for Android.
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. The code for that has been given in both Java and Kotlin Programming Language for Android.
Step 2: Working with the XML files
Navigate to the app > res > layout > activity_main.xml and add the below code to that file. Below is the code for the activity_main.xml file.
XML
<?xml version="1.0" encoding="utf-8"?><androidx.constraintlayout.widget.ConstraintLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="center" android:gravity="center" android:orientation="vertical" android:padding="16sp" tools:context=".MainActivity"> <Button android:id="@+id/check" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:onClick="getallapps" android:text="Get Installed Apps" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> <TextView android:id="@+id/totalapp" android:layout_width="match_parent" android:layout_height="wrap_content" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/check" /> <ListView android:id="@+id/listview" android:layout_width="365dp" android:layout_height="523dp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/totalapp" tools:layout_editor_absoluteY="150dp" /> </androidx.constraintlayout.widget.ConstraintLayout> |
Method 1
Go to the MainActivity file and refer to the following code. Below is the code for the MainActivity file. Comments are added inside the code to understand the code in more detail.
Java
import android.content.pm.ApplicationInfo;import android.content.pm.PackageManager;import android.os.Bundle;import android.view.View;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView;import androidx.appcompat.app.AppCompatActivity;import java.util.List; public class MainActivity extends AppCompatActivity { ListView listView; TextView text; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // initialise layout listView = findViewById(R.id.listview); text = findViewById(R.id.totalapp); } public void getallapps(View view) { // get list of all the apps installed List<ApplicationInfo> infos = getPackageManager().getInstalledApplications(PackageManager.GET_META_DATA); // create a list with size of total number of apps String[] apps = new String[infos.size()]; int i = 0; // add all the app name in string list for (ApplicationInfo info : infos) { apps[i] = info.packageName; i++; } // set all the apps name in list view listView.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, apps)); // write total count of apps available. text.setText(infos.size() + " Apps are installed"); } @Override protected void onStart() { super.onStart(); }} |
Kotlin
import android.content.pm.PackageManagerimport android.os.Bundleimport android.widget.ArrayAdapterimport android.widget.ListViewimport android.widget.TextViewimport androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { lateinit var listView: ListView lateinit var text: TextView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) // initialise layout listView = findViewById(R.id.listview) text = findViewById(R.id.totalapp) } fun getAllApps() { // get list of all the apps installed val infos = packageManager.getInstalledApplications(PackageManager.GET_META_DATA) // create a list with size of total number of apps val apps = arrayOfNulls<String>(infos.size) // add all the app name in string list for ((i, info) in infos.withIndex()) { apps[i] = info.packageName } // set all the apps name in list view listView.adapter = ArrayAdapter(this@MainActivity, android.R.layout.simple_list_item_1, apps) // write total count of apps available. text.text = infos.size.toString() + " Apps are installed" } override fun onStart() { super.onStart() }} |
Output:
Method 2
Go to the MainActivity file and refer to the following code. Below is the code for the MainActivity file. Comments are added inside the code to understand the code in more detail.
Java
import android.content.pm.PackageInfo;import android.os.Bundle;import android.view.View;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView;import androidx.appcompat.app.AppCompatActivity;import java.util.List; public class MainActivity extends AppCompatActivity { ListView listView; TextView text; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // initialise layout listView = findViewById(R.id.listview); text = findViewById(R.id.totalapp); } public void getallapps(View view) { // get list of all the apps installed List<PackageInfo> packList = getPackageManager().getInstalledPackages(0); String[] apps = new String[packList.size()]; for (int i = 0; i < packList.size(); i++) { PackageInfo packInfo = packList.get(i); apps[i] = packInfo.applicationInfo.loadLabel(getPackageManager()).toString(); } // set all the apps name in list view listView.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, apps)); // write total count of apps available. text.setText(packList.size() + " Apps are installed"); } @Override protected void onStart() { super.onStart(); }} |
Kotlin
import android.os.Bundleimport android.widget.ArrayAdapterimport android.widget.ListViewimport android.widget.TextViewimport androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { lateinit var listView: ListView lateinit var text: TextView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) // initialise layout listView = findViewById(R.id.listview) text = findViewById(R.id.totalapp) } fun getAllApps() { // get list of all the apps installed val packList = packageManager.getInstalledPackages(0) val apps = arrayOfNulls<String>(packList.size) for (i in packList.indices) { val packInfo = packList[i] apps[i] = packInfo.applicationInfo.loadLabel(packageManager).toString() } // set all the apps name in list view listView.adapter = ArrayAdapter(this@MainActivity, android.R.layout.simple_list_item_1, apps) // write total count of apps available. text.text = packList.size.toString() + " Apps are installed" } override fun onStart() { super.onStart() }} |
Output:
Method 3
Go to the MainActivity file and refer to the following code. Below is the code for the MainActivity file. Comments are added inside the code to understand the code in more detail.
Java
import android.content.Intent;import android.content.pm.PackageManager;import android.content.pm.ResolveInfo;import android.content.res.Resources;import android.os.Bundle;import android.view.View;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView;import androidx.appcompat.app.AppCompatActivity;import java.util.ArrayList;import java.util.List; public class MainActivity extends AppCompatActivity { ListView listView; TextView text; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // initialise layout listView = findViewById(R.id.listview); text = findViewById(R.id.totalapp); } public void getallapps(View view) throws PackageManager.NameNotFoundException { final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null); mainIntent.addCategory(Intent.CATEGORY_LAUNCHER); // get list of all the apps installed List<ResolveInfo> ril = getPackageManager().queryIntentActivities(mainIntent, 0); List<String> componentList = new ArrayList<String>(); String name = null; int i = 0; // get size of ril and create a list String[] apps = new String[ril.size()]; for (ResolveInfo ri : ril) { if (ri.activityInfo != null) { // get package Resources res = getPackageManager().getResourcesForApplication(ri.activityInfo.applicationInfo); // if activity label res is found if (ri.activityInfo.labelRes != 0) { name = res.getString(ri.activityInfo.labelRes); } else { name = ri.activityInfo.applicationInfo.loadLabel( getPackageManager()).toString(); } apps[i] = name; i++; } } // set all the apps name in list view listView.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, apps)); // write total count of apps available. text.setText(ril.size() + " Apps are installed"); } @Override protected void onStart() { super.onStart(); }} |
Kotlin
import android.content.Intentimport android.content.pm.PackageManagerimport android.os.Bundleimport android.widget.ArrayAdapterimport android.widget.ListViewimport android.widget.TextViewimport androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { lateinit var listView: ListView lateinit var text: TextView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) // initialise layout listView = findViewById(R.id.listview) text = findViewById(R.id.totalapp) } @Throws(PackageManager.NameNotFoundException::class) fun getAllApps() { val mainIntent = Intent(Intent.ACTION_MAIN, null) mainIntent.addCategory(Intent.CATEGORY_LAUNCHER) // get list of all the apps installed val ril = packageManager.queryIntentActivities(mainIntent, 0) val componentList: List<String> = ArrayList() lateinit var name: String var i = 0 // get size of ril and create a list val apps = arrayOfNulls<String>(ril.size) for (ri in ril) { if (ri.activityInfo != null) { // get package val res = packageManager.getResourcesForApplication(ri.activityInfo.applicationInfo) // if activity label res is found name = if (ri.activityInfo.labelRes != 0) { res.getString(ri.activityInfo.labelRes) } else { ri.activityInfo.applicationInfo.loadLabel(packageManager).toString() } apps[i] = name i++ } } // set all the apps name in list view listView.adapter = ArrayAdapter(this@MainActivity, android.R.layout.simple_list_item_1, apps) // write total count of apps available. text.text = ril.size.toString() + " Apps are installed" } override fun onStart() { super.onStart() }} |
