CODEWITHSUNDEEP
androidkotlinandroid-manifest
ghita
ghita

Reputation: 2796

Difference between launching app from recents and home screen

I have ActivityA as launcher activity.

From ActivityA I open -> ActivityB. I put the app in background.

When I open the app from recents the app is resumed with ActivityB. When I open the app from homescreen, the app is resumed with ActivityA without calling onCreate(), just onResume().

Why is ActivityB cleared from stack when I open the app from homescreen, even if onCreate() from ActivityA is never called, and how to fix this?

Manifest file looks like this:

ActivityA:

 <activity-alias
            android:name=".Launcher"
            android:label="@string/app_name"
            android:targetActivity="path.ActivityA">

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

        </activity-alias>

        <activity
            android:name=".path.ActivityA"
            android:launchMode="singleTask"
            android:screenOrientation="sensorPortrait"
            android:theme="@style/BlackIntroTheme"
            android:windowSoftInputMode="adjustPan">
            <nav-graph android:value="@navigation/graph1" />
            <nav-graph android:value="@navigation/graph2" />
            <nav-graph android:value="@navigation/graph3" />
            <nav-graph android:value="@navigation/graph4" />
        </activity>

ActivityB:

  <activity
            android:name=".path.ActivityB"
            android:launchMode="singleTask"
            android:screenOrientation="sensorPortrait"
            android:windowSoftInputMode="adjustPan" />

Upvotes: 2

Views: 356

Answers (1)

snachmsm
snachmsm

Reputation: 19233

this is how Activity stacking works, some nice example of all launchModes in HERE, more complex info in DOCs

in short - Activity with singleTask started (again) will clear all on-top-of-it Activities. you have your first MAIN Activity declared with this launchMode, so every icon click on devices launcher will clear your Activities stack. you can track this by overriding onNewIntent method. picking from recents just brings all your Activities stack to front, with last opened on top ofc.

consider removing launchMode (is this necessary line for you?) or set it as standard (default)

android:launchMode="standard"

Upvotes: 5

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