How to Change App Icon of Android Programmatically in Android? - GeeksforGeeks

30 Jun, 2021
In this article, we are going to learn how to change the App Icon of an App on the Button Click. This feature can be used when we have an app for different types of users. Then as per the user type, we can change the App Icon Dynamically. 
Step 1: Create a New Project
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Java as the programming language.
Step 2: Add this in AndroidManifest.xml File
XML
<?xml version="1.0" encoding="UTF-8"?>  <manifest package="com.prepare.packagename"           xmlns:android="http://schemas.android.com/apk/res/android">  <application   android:theme="@style/Theme.packagename"  android:supportsRtl="true"   android:roundIcon="@mipmap/ic_launcher_round"  android:label="@string/app_name"   android:icon="@mipmap/ic_launcher_old"  android:allowBackup="true">  <activity android:name=".MainActivity">      <intent-filter>          <action android:name="android.intent.action.MAIN"/>        <category android:name="android.intent.category.LAUNCHER"/>      </intent-filter>  </activity>  <activity-alias   android:name=".MainActivityAlias"   android:roundIcon="@drawable/ic_launcher_p_foreground"  android:label="@string/app_name"  android:icon="@mipmap/ic_launcher"  android:enabled="false"   android:targetActivity=".MainActivity">      <intent-filter>          <action android:name="android.intent.action.MAIN"/>        <category android:name="android.intent.category.LAUNCHER"/>      </intent-filter>          </activity-alias>    </application></manifest>
Step 3: Working with the activity_main.xml file
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"?><LinearLayout    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:orientation="vertical"    android:layout_gravity="center"    android:gravity="center"    tools:context=".MainActivity">      <TextView        android:id="@+id/newicon"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text=" New Icon"        android:textColor="@color/black"        android:textSize="20sp"        app:layout_constraintBottom_toBottomOf="parent"        app:layout_constraintLeft_toLeftOf="parent"        app:layout_constraintRight_toRightOf="parent"        app:layout_constraintTop_toTopOf="parent" />        <TextView        android:id="@+id/oldicon"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text=" Old Icon"        android:textColor="@color/black"        android:textSize="20sp"        android:layout_marginTop="40dp"        app:layout_constraintBottom_toBottomOf="parent"        app:layout_constraintLeft_toLeftOf="parent"        app:layout_constraintRight_toRightOf="parent"        app:layout_constraintTop_toTopOf="parent" />  </LinearLayout>
Step 4: Working with the MainActivity.java file
Go to the MainActivity.java file and refer to the following code. Below is the code for the MainActivity.java file. Comments are added inside the code to understand the code in more detail.
Java
import android.content.ComponentName;import android.content.pm.PackageManager;import android.graphics.Color;import android.os.Bundle;import android.text.SpannableString;import android.text.Spanned;import android.text.method.LinkMovementMethod;import android.text.style.BackgroundColorSpan;import android.text.style.ClickableSpan;import android.text.style.ForegroundColorSpan;import android.view.View;import android.widget.TextView;import android.widget.Toast;  import androidx.appcompat.app.AppCompatActivity;  public class MainActivity extends AppCompatActivity {      TextView click,newicon;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        click=findViewById(R.id.oldicon);        newicon=findViewById(R.id.newicon);        click.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                changeicon();            }        });        newicon.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                newicon();            }        });      }    private void changeicon() {                    // enable old icon        PackageManager manager=getPackageManager();        manager.setComponentEnabledSetting(new ComponentName(MainActivity.this,"com.prepare.makedirectory.MainActivity")                ,PackageManager.COMPONENT_ENABLED_STATE_ENABLED,PackageManager.DONT_KILL_APP);                    // disable new icon        manager.setComponentEnabledSetting(new ComponentName(MainActivity.this,"com.prepare.makedirectory.MainActivityAlias")                ,PackageManager.COMPONENT_ENABLED_STATE_DISABLED,PackageManager.DONT_KILL_APP);        Toast.makeText(MainActivity.this,"Enable Old Icon" ,Toast.LENGTH_LONG).show();    }      private void newicon() {                    // enable old icon        PackageManager manager=getPackageManager();        manager.setComponentEnabledSetting(new ComponentName(MainActivity.this,"com.prepare.makedirectory.MainActivity")                ,PackageManager.COMPONENT_ENABLED_STATE_DISABLED,PackageManager.DONT_KILL_APP);                    // enable new icon        manager.setComponentEnabledSetting(new ComponentName(MainActivity.this,"com.prepare.makedirectory.MainActivityAlias")                ,PackageManager.COMPONENT_ENABLED_STATE_ENABLED,PackageManager.DONT_KILL_APP);        Toast.makeText(MainActivity.this,"Enable New Icon" ,Toast.LENGTH_LONG).show();    }}
 Output:
Android
Java
Java
Android
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