android-activitymanager

Description I want to build todolist app.I want to store information using RoomDatabse. I build Database with room and get infomation than save to database. But when i click add button then i got exception. I have searched for an appropriate solution over the web but didn't find anything useful. Please help me. My exception Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.core.app.ActivityManagerCompat" while store data using Room. My Android Studio Configuration compileSdkVersion 27 buildToolsVersion '28.0.3' minSdkVersion 15 targetSdkVersion 27 My Database Class

I have 3 different Activities that user navigates between in no particular order. My goal it twofold: When user switches to something else when app is resumed I want to start where user left even if app was terminated When last activity is resumed I want to restore it to the last viewed state (this one I think I have a pretty good idea on how to achive) I think the problem is not start/stop - where I pretty much get what I need, but onCreate() if app was terminated. In that case - it picks Activity that I configured in the manifest. I suppose I can put something in onCreate() method of that

I have an android application i need one function or any broadcast receiver that can check if the app is closed.. i don't need to call on destroy in every activity (there is about 20 activity into the app) i tried to add this function in Application class public class ApplicationLifeCycleManager implements ActivityLifecycleCallbacks { /** Manages the state of opened vs closed activities, should be 0 or 1. * It will be 2 if this value is checked between activity B onStart() and * activity A onStop(). * It could be greater if the top activities are not fullscreen or have * transparent