CODEWITHSUNDEEP
androidlistviewandroid-fragmentsandroid-listfragment
mhorgan
mhorgan

Reputation: 886

Unable to reference ListView while using ListFragment

I'm trying to populate a ListView using JSON but I'm running into trouble referencing the ListView.

Here is my layout_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="10dp"
android:paddingRight="10dp">


<ListView
    android:id="@id/android:list"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_weight="1"
    android:drawSelectorOnTop="false" />


<TextView
    android:id="@android:id/empty"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:text="No data"        />
</LinearLayout>

I read on the ListFragment documentation that when designing a custom list, I need to keep the ListView's id as "@id/android:list".

Here is the piece of code that I am having problems with:

list = (ListView)getView().findViewById(R.id.list);

I currently have that code in my JSON parsing method but I have tried putting it in my public View onCreateView method according to other suggestions that I read online, but I still get the following error:

Cannot Resolve symbol 'list'

Would anyone be able to help clear up my issue?

Upvotes: 1

Views: 105

Answers (2)

GVillani82
GVillani82

Reputation: 17439

The class ListFragment includes a listview and adapter inside it, and also provides some methods that allow you to get the listview and operate on it.

You can refer to it (from the ListFragment) in this way:

getListView()

You need to refer to the android:id="@id/android:list" only if you want customize the layout. In this case you need to override the onCreateView method, and then refer to the list element "@android:id/list"

(ListView)getView().findViewById(android.R.id.list)

and

getListView()

are the same things. But you don't need to use the first expression, except if you want customize the ListView inside the ListFragment

Upvotes: 1

xxxzhi
xxxzhi

Reputation: 481

list = (ListView)getView().findViewById(R.id.list);

do you use your application R or android's R? try to code like this:

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

Upvotes: 1

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