How to deal with android multiple instances? -

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the launchmode "singletop":

<activity android:name=".mainactivity" android:label="@string/app_name" android:launchmode="singletop">         <intent-filter>             <action android:name="android.intent.action.main"/>             <category android:name="android.intent.category.launcher"/>         </intent-filter>     </activity>     <activity android:name=".gridactivity"></activity>

the mainactivity splash screen, when finish (authenticate server) it'll call gridactivity.

the problem specific:

when install app google play icon appear in 2 places: application drawer & "desktop" (launcher screen - default launcher).

steps reproduce problem:

  1. open app application drawer , wait gridactivity displayed
  2. press "home" button send application background
  3. open app "desktop" (device's default launcher)
  4. the application start in new instance

i expect application go directly gridactivity because of "singletop" launchmethod.

btw, if on step 3 open application again application drawer works fine, goes directly gridactivity.

what missing?

because you;re using launch activity "splash screen" getting destroyed, leads behavior. once destroyed, process calling launch in new process. read more:

android "single top" launch mode , onnewintent method

the "singletop" launch mode not necessary. although around this, use "first time through" flag launches splash screen main activity. seems work pretty well.

edit:

you should careful read on "launchmode" - singletop , "standard" modes have behavior, docs:

an activity "standard" or "singletop" launch mode can instantiated multiple times.

http://developer.android.com/guide/topics/manifest/activity-element.html#lmode

you experiencing aspect of singletop:

for example, if existing instance of "singletop" activity in target task, not @ top of stack, or if it's @ top of stack, not in target task — new instance created , pushed on stack.

the 2 launch locations resulting in 2 different target tasks. because of how 2 screens create intents or because "splashscreen" destroyed , therefore not present (it not "only" destroyed hitting - android has several algorithms destroying activities conserve processing , memory. should assume if activity not visible, can destroyed , re-created @ time).


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