Android – Automatic timing switch APP icon, holiday APP icon automatically change

First of all, pre-defined in The AndroidManifest, set icon, set enabble to false to disable, and point to the original SplashActivity

<activity android:name=".SplashActivity">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

<! --Activity alias, which must be built into the APP -->
<activity-alias
	<!--thisActivityClasses may not necessarily exist-->
    android:name=".SplashAliasActivity"
    android:enabled="false"
    <! -- define holiday icon here -->
    android:icon="@mipmap/ic_launcher_spring_festival"
    android:targetActivity=".SplashActivity">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity-alias>
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When the APP is running in the background, replace the icon (set enable to true) and disable the original component. You can use WorkManager to set automatic tasks

// Omit the scheduled task code (see WorkManager) and set the scheduled toggle icon
// Disable the original icon
val oldActivity = ComponentName(applicationContext, SplashActivity::class.java)
applicationContext.packageManager.setComponentEnabledSetting(oldActivity, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP)
// Enable the new icon
val newActivity = ComponentName(applicationContext, "Your.Full.PackageName.SplashAliasActivity")
applicationContext.packageManager.setComponentEnabledSetting(newActivity, PackageManager.COMPONENT_ENABLED_STATE_ENABLED,PackageManager.DONT_KILL_APP)
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