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    <p>android:launchMode An instruction on how the activity should be launched. There are four modes that work in conjunction with activity flags (FLAG_ACTIVITY_* constants) in Intent objects to determine what should happen when the activity is called upon to handle an intent. They are:</p> <p>"standard" </p> <p>"singleTop"</p> <p>"singleTask"</p> <p>"singleInstance"</p> <p>The default mode is "standard".</p> <p>with "standard" and "singleTop" activities on one side, and "singleTask" and "singleInstance" activities on the other. An activity with the "standard" or "singleTop" launch mode can be instantiated multiple times. The instances can belong to any task and can be located anywhere in the activity stack. Typically, they're launched into the task that called startActivity() (unless the Intent object contains a FLAG_ACTIVITY_NEW_TASK instruction, in which case a different task is chosen — see the taskAffinity attribute).</p> <p>In contrast, "singleTask" and "singleInstance" activities can only begin a task. They are always at the root of the activity stack. Moreover, the device can hold only one instance of the activity at a time — only one such task.</p> <p><strong>So by default it is standard , than it will use the activity from backstack . Read about android Activity stack . and when activity is coming from back stack and all. It's taking less time when u again launch the activity , because it has lot many objects in heap</strong></p> <p>As per this documents , when activity is poped from the stack ... it's going to be destroyed.<a href="http://developer.android.com/guide/components/tasks-and-back-stack.html" rel="nofollow">http://developer.android.com/guide/components/tasks-and-back-stack.html</a></p> <p><strong>But your activity taking different time when u launch it. That is because system's garbage collector runs at some period of time and clears the allocated memory to object. So After starting Activity A , you are going in ACtivity B.Now you are pressing back button :-that means Activity B is going to be pop out of stack and will be destroyed soon.But you are starting that activity before garbage collector runs .That's why it's taking less time</strong></p> <p>Do one thing , run System.gc() at on destroy ....or write finish() in onPause() ...ur Activity will take almost same time to inflate layout.</p>
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    1. POIs view inflation cached in Activity
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    1. USPranav Jadav
    1. USPranav Jadav
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    1. COIsn't the activity gone when destroyed. There is no back stack at that point. A->B->(back, resulting in destroying and throwing B away)->A
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    2. COI printed the "this" pointer of the activity and it always gave me the new activity whenever i launched the activity again.
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    3. COActually thing is that , when u start B activity from Activity A..it will start activity B and Activity A will be in the backstack . In this case if u press back button than Activity B will be destroy and the previous activity of the stack (which is Activity A) will come to front . This time it will call the onRestart() method of the Activity A.
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      1. USPranav Jadav
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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