首先在AndroidManifest中预定义好, 设置好icon,enabble设为false不启用,并指向原有的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
<!--此Activity类可以不必真实存在-->
android:name=".SplashAliasActivity"
android:enabled="false"
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>
当APP在后台运行时,替换图标(将enable设为true),同时将原组件禁用,可以采用workmanager设定自动任务
val oldActivity = ComponentName(applicationContext, SplashActivity::class.java)
applicationContext.packageManager.setComponentEnabledSetting(oldActivity, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP)
val newActivity = ComponentName(applicationContext, "Your.Full.PackageName.SplashAliasActivity")
applicationContext.packageManager.setComponentEnabledSetting(newActivity, PackageManager.COMPONENT_ENABLED_STATE_ENABLED,PackageManager.DONT_KILL_APP)