Error: You must supply a resource ID for a TextView

Question

I have list that retrive a form my sql with (course id- course name).

I use a hash her for the list, I create an adapter which give me the list and I set it to spinner. However there is a problem in log cat that said:

score 4 · Answer 1 · answered Nov 12 '12 at 11:51

as Very well Explain by Luksprog :

The ArrayAdapter requires the resource ID to be a TextView XML exception means you don't supply what the ArrayAdapter expects. When you use this constructor:

new ArrayAdapter<String>(this, R.layout.a_layout_file, this.file)

R.Layout.a_layout_file must be an xml layout where the first element must be a TextView, something like this:

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" 
    //other attributes 
/>

If you want your list row layout to be something a little different then a simple TextView element use this constructor:

new ArrayAdapter<String>(this, R.layout.a_layout_file, 
   R.id.the_id_of_a_textview_from_the_layout, this.file)

where you supply the id of a layout that can contain various views, but also must contain a TextView with and id(third parameter) that you pass to your ArrayAdapter so it can know where to put the Strings

her is my xml what should i do – user1698448 Nov 12 '12 at 12:05 — user1698448, Nov 12 '12 at 12:05

Nermeen · Accepted Answer · 2012-11-12T12:11:31.913

3

If you check http://developer.android.com/reference/android/widget/ArrayAdapter.html#ArrayAdapter(android.content.Context, int, T[]), you will find that the array adapter is expecting that the second parameter is a resource id of a text view not a layout..

initialize your adapter using:

new ArrayAdapter(MainActivity.this, android.R.layout.simple_spinner_item, coursesList);

edited Nov 12 '12 at 12:11

answered Nov 12 '12 at 11:45

Nermeen

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text view of what i have only spinner ? – user1698448 Nov 12 '12 at 11:48
her is my xml – user1698448 Nov 12 '12 at 12:05
do you know how can i change the layout so it display only the name and the id is hidden – user1698448 Nov 12 '12 at 12:26
if you pass a list containing only the names..http://www.java-samples.com/showtutorial.php?tutorialid=1517 – Nermeen Nov 12 '12 at 12:38
but i want to have the id ? cause it is really important – user1698448 Nov 12 '12 at 12:42
check http://stackoverflow.com/questions/1625249/android-how-to-bind-spinner-to-custom-object-list – Nermeen Nov 12 '12 at 12:45

Error: You must supply a resource ID for a TextView

2 Answers2