Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

ListActivity

Posted on 2012-04-06
2
Medium Priority
?
484 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:
Santhana earned 2000 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

[Webinar] Cloud and Mobile-First Strategy

Maybe you’ve fully adopted the cloud since the beginning. Or maybe you started with on-prem resources but are pursuing a “cloud and mobile first” strategy. Getting to that end state has its challenges. Discover how to build out a 100% cloud and mobile IT strategy in this webinar.

Question has a verified solution.

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

In this post we will learn different types of Android Layout and some basics of an Android App.
Creating a Cordova application which allow user to save to/load from his Dropbox account the application database.
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.
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…

916 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