Solved

ListActivity

Posted on 2012-04-06
2
447 Views
Last Modified: 2012-04-09
Please see the attahed file. When I extend Activity everything works fine. When I extend ListActivity the application crashes. Why is that? Am I not implementing something?

Basically trying to implement a screen with a few navigation buttons, and in the middle a ListView. Need help implementing.
ListActivity.txt
0
Comment
Question by:InfoTechEE
2 Comments
 
LVL 8

Accepted Solution

by:
santhanasamy earned 500 total points
ID: 37818561
Hi  InfoTechEE,

Refer this from android docs.
http://developer.android.com/reference/android/app/ListActivity.html

You must have the list view with the id "@android:id/list" in your layout file "saved"

     <ListView android:id="@android:id/list"              
     android:layout_width="match_parent"              
     android:layout_height="match_parent"/>

Get this list from the activity like this

listDisplayFiles = (ListView) findViewById(android.R.id.list);

Other wise it will through the error at run time...
0
 
LVL 7

Expert Comment

by:tampnic
ID: 37821378
If your writing code within the list activity its easier and faster to get the ListView associated with the activity by using the getListView() function (inherited from the base class ListActivity). This function returns the list reference directly from the base class without having to do a (sometimes costly) findViewById() call.

Cheers,
  Chris
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How can i get adb to recognize my phone in linux ? 10 89
Contacts & Calendars Synchronization 4 83
Advice on suitable tablet device. 13 86
Adups vulnerability 5 90
In this article we will discuss all things related to StageFright bug, the most vulnerable bug of android devices.
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
This video is in connection to the article "The case of a missing mobile phone (https://www.experts-exchange.com/articles/28474/The-Case-of-a-Missing-Mobile-Phone.html)". It will help one to understand clearly the steps to track a lost android phone.
When you create an app prototype with Adobe XD, you can insert system screens -- sharing or Control Center, for example -- with just a few clicks. This video shows you how. You can take the full course on Experts Exchange at http://bit.ly/XDcourse.

937 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

7 Experts available now in Live!

Get 1:1 Help Now