android-lifecycle

I have an Android application which is composed from a single Activity . How can I assure that only one instance of my application (== Activity ) will exist in a given time? I got to a situation in which I succeeded to open multiple instances of my app by clicking on the app icon multiple times (this doesn't reproduce all the time). change your manifest like this: <activity android:name="com.yourpackage.YourActivity" android:label="@string/app_name" android:launchMode="singleTask" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent

I am getting the following error and i have no clue as to why its happening. Error: 08-23 17:07:46.533 22454-22454/com.a.b.c E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.a.b.c, PID: 22454 java.lang.RuntimeException: Unable to resume activity {com.a.b.c/com.a.b.c.MainActivity}: java.lang.IllegalStateException: Activity {com.a.b.c/com.a.b.c.MainActivity} did not call finish() prior to onResume() completing at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3103) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3134) at android.app.ActivityThread

FATAL EXCEPTION: main Process: com.example.loan, PID: 24169 java.lang.IllegalStateException: Fragment already added: FormFragment{428f10c8 #1 id=0x7f050055 form} at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1192) at android.support.v4.app.BackStackRecord.popFromBackStack(BackStackRecord.java:722) at android.support.v4.app.FragmentManagerImpl.popBackStackState(FragmentManager.java:1533) at android.support.v4.app.FragmentManagerImpl$2.run(FragmentManager.java:489) at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1484) at

I have a FragmentActivity support v4 class which implements two side by side (kind of like gmail) fragments and a button which can bring up a DialogFragment. This all works great unless I have an orientation change. When I have an orientation change the states of the Fragments are not saved. And the main problem is if I have a the FragmentDialog open, it simply disappears. I have set setRetainInstance(true); in all fragments but it did not help. In my manifest I included android:configChanges="orientation" but is still does not help. Here are my code samples, thank you for the help. public

I know looks like some stupid error, but I cannot find it. In my project I have access to LifecycleOwner from my Fragments but not from Activity. Here is my build.gradle implementation project(':domain') implementation project(':data') implementation fileTree(dir: 'libs', include: ['*.jar']) implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.1.1' implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.1.1' implementation 'androidx.appcompat:appcompat:1.0.2' implementation 'androidx.core:core-ktx:1

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