Comprehensive Guide to Modifying Android App Names: From Launcher Labels to Application IDs

Core Mechanisms of Android App Name Modification

In Android app development, modifying app names is a common but delicate task. App names primarily involve two key concepts: the Application Label and the Launcher Label. The application label typically appears in the system settings' app management interface, while the launcher label is displayed directly beneath the app icon on the user's home screen. Understanding the distinction between these two is fundamental to correctly modifying app names.

Label Configuration in AndroidManifest.xml

Android app name configuration is primarily achieved through the AndroidManifest.xml file. Both the <application> element and <activity> elements within this file contain the android:label attribute, which controls display names in different contexts.

Here is a complete configuration example demonstrating how to set application and launcher labels separately:

<application
    android:label="@string/app_name"
    android:icon="@mipmap/ic_launcher"
    android:theme="@style/AppTheme">
    
    <activity
        android:name=".MainActivity"
        android:label="@string/launcher_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

In this configuration, @string/app_name defines the name displayed in system settings, while @string/launcher_name defines the name shown beneath the launcher icon on the home screen. This separation allows developers to set different display texts for various scenarios.

String Resource Management

The best practice is to define all text content in the res/values/strings.xml resource file rather than hardcoding it directly in XML. This facilitates internationalization, localization, and centralized management.

A typical strings.xml configuration looks like this:

<resources>
    <string name="app_name">My Application</string>
    <string name="launcher_name">Quick Launch</string>
    <string name="title_activity_splash">Splash Screen</string>
</resources>

Special Handling for Launcher Activities

When an app includes a splash screen, special attention must be paid to the launcher activity configuration. If the splash screen activity is set as the LAUNCHER activity, its android:label attribute will determine the name displayed on the home screen.

Here is a configuration example for a splash screen activity:

<activity
    android:name=".SplashActivity"
    android:label="@string/title_activity_splash"
    android:theme="@style/SplashTheme">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

In this case, modifying the string value corresponding to @string/title_activity_splash will change the app name displayed on the home screen.

Distinguishing Application ID from Namespace

It's crucial to distinguish between app display names and the Application ID. The Application ID serves as the unique identifier for the app, used to recognize the app on devices and in app stores, with a format similar to Java package names (e.g., com.example.myapp).

The Application ID is defined in the module-level build.gradle file:

android {
    defaultConfig {
        applicationId "com.example.myapp"
        minSdkVersion 21
        targetSdkVersion 34
        versionCode 1
        versionName "1.0"
    }
}

Modifying the Application ID changes the app's identity and may cause the Google Play Store to treat it as a new app, so this should be done cautiously. In contrast, modifying display names does not affect app identification.

Practical Modification Steps

To modify the app name displayed on the home screen, follow these steps:

1. Open the project's AndroidManifest.xml file
2. Locate the activity element containing the MAIN action and LAUNCHER category
3. Modify the android:label attribute value of that activity
4. Ensure the referenced string resources are correctly defined in strings.xml
5. Recompile and run the application

If you need to simultaneously modify the display name in system settings, you must also modify the android:label attribute of the <application> element.

Common Issues and Solutions

In practical development, you might encounter situations where name modifications don't take effect. Common causes include:

• Cache Issues: Clear app data or reinstall the application
• Configuration Conflicts: Check if multiple activities have LAUNCHER intent-filters configured
• Resource Reference Errors: Verify that string resource names are spelled correctly
• Build Configuration Problems: Check if build.gradle configurations affect resource packaging

Best Practice Recommendations

Based on practical development experience, we recommend following these best practices:

• Always use string resource references instead of hardcoded text
• Configure different display names for various build variants (e.g., debug, release)
• Regularly test name modifications across different devices and system versions
• Back up original configurations before making significant changes
• Follow Material Design guidelines to ensure reasonable name length and format

By properly understanding and utilizing Android's label configuration mechanisms, developers can flexibly control app display names across different scenarios, enhancing user experience and app professionalism.