Android How to set an app as a persistent app without being shut down by low memory kill

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[Description]
How to set an app as a live app without being shut down by low memory kill

[Keyword]

App Persistent persistent

[Solution]

1. Add an attribute android:persistent= "true" to application in the app's manifest.xml

2. Use platform's signature for this app

3. Place under System/app

Note: After an app is set to persistent, it will be difficult to kill by low memory Kill (OOM_ADJ=-12), please carefully confirm whether it is necessary before setting, otherwise it will waste memory.