Using ListView or TextView with the ArrayAdapter on Android?

Question

I'm trying to print an Array String[] in the listView of my fragment and I always get an error. Here's my fragment class:

public class Fragment_Database extends Fragment

public Fragment_Database() {
    // Constructor
}

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
    View v = inflater.inflate(R.layout.fragment_database, container, false);

    ListView list;
    list = (ListView) v.findViewById(R.id.listView1);

    String[] names = new String[] { "Linux", "Windows7", "Eclipse", "Suse",
            "Ubuntu", "Solaris", "Android", "iPhone"};

    list.setAdapter(new ArrayAdapter<String>(getActivity(),R.layout.fragment_database, names));
    return v;
}

}

Here's the XML:

<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/listView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />

If I put a ListView in the XML I get this error:

java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView

And if I put a TextView in the XML, I get this one:

android.widget.TextView cannot be cast to android.widget.ListView

score 0 · Answer 1 · edited May 23 '17 at 11:49

0

Instead of

list.setAdapter(new ArrayAdapter<String>(getActivity(),R.layout.fragment_database, names));

Try

list.setAdapter(new ArrayAdapter<String>(getActivity(),android.R.id.text1, names));

Regarding the details of android.R.id.text1 found here.

edited May 23 '17 at 11:49

Community

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answered Mar 26 '14 at 01:37

NullPointerException

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When I should use android.R or simply R? What is the difference... Because I've seen both over the internet.. – Jaythaking Mar 26 '14 at 01:41
because your ArrayAdapter expecting the underlying textView. which could not found in your case. Regarding details please see the mentioned link. – NullPointerException Mar 26 '14 at 01:45

score 0 · Accepted Answer · answered Mar 26 '14 at 01:40

0

your code is wrong.

list.setAdapter(new ArrayAdapter<String>(getActivity(),R.layout.fragment_database, names));

you use this code.

list.setAdapter(new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1, names));

R.layout.fragment_database is not ListviewItem's xml file.
You use custom item layout or simpleItemLayout.
read this page and try again.
http://www.vogella.com/tutorials/AndroidListView/article.html

answered Mar 26 '14 at 01:40

Amadas

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Thanks! :D It works... Which layout should i use if I want a gridView instead of a simplee_list... ? do you know? i'm closing the question after :P – Jaythaking Mar 26 '14 at 01:52
I'm not use GridView. but i can this page easily. [link]http://androidexample.com/Grid_Layout_-_Android_Example/index.php?view=article_discription&aid=75&aaid=99 – Amadas Mar 26 '14 at 01:55

Using ListView or TextView with the ArrayAdapter on Android?

2 Answers2