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    <p>What you might be looking for is <a href="http://developer.android.com/reference/android/content/Intent.html#FLAG_ACTIVITY_CLEAR_TOP" rel="nofollow">FLAG_ACTIVITY_CLEAR_TOP</a> intent flag:</p> <blockquote> <p>If set, and the activity being launched is already running in the current task, then instead of launching a new instance of that activity, all of the other activities on top of it will be closed and this Intent will be delivered to the (now on top) old activity as a new Intent.</p> </blockquote> <pre><code>Intent i = new Intent(..); i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); </code></pre> <p>and then start Activity with this intent.</p> <p>See more on tasks and back stack in documentation: <a href="http://developer.android.com/guide/topics/fundamentals/tasks-and-back-stack.html" rel="nofollow">Tasks and Back stack</a>. </p> <p>However to implement login/logout to application (if it is not communicating with online service) you might use <a href="http://developer.android.com/reference/android/content/SharedPreferences.html" rel="nofollow">SharedPreferences</a>. This way on application start you could check if user is logged in (eg. some flag turned on in preferences) and upon application exit (eg. by button) you could clear this flag.</p> <p>Killing/removing Activities should be left to the system. Per system design it is Android OS that is responsible for application lifetime.</p> <p>For example check the <a href="http://code.google.com/p/android-passwordsafe/" rel="nofollow">Password Safe</a> application sources. It needs password every time you open fresh instance of application.</p>
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    1. POFinishing all activities started before the activity
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    1. USMarcin Gil
    1. USMarcin Gil
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    1. COHi Gil,I tried this but this do not work it show me all the activities which were called before. I am missing anything else?
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      1. USPooja M. Bohora
    2. COSo actually I find topic and explanation a bit confusing: in topic you want to finish everything started before starting new activity, while explanation suggests killing your application. Can you elaborate?
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      1. USMarcin Gil
 

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Guidance
A row detail

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.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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