Question

I am using following layout for my list view items.

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://scheme.android.com/apk/res/android"
    android:id="@+id/text1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:paddingLeft="10dip"
    android:textSize="18sp"
    android:minHeight="40sp"
    />

But I am getting an error in the logcat java.lang.RuntimeException … that you must supply a layout_width argument.

My main.xml is

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/widget28"
    android:background="#ff000033"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ImageView
        android:layout_width="70px"
        android:layout_height="30px"
        android:paddingLeft="2px"
        android:paddingTop="2px"
        android:background="@drawable/ic_launcher"
     ></ImageView>

    <ListView
        android:id="@+id/myListView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
</LinearLayout>

and this is my activity’s onCreate code

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    context=this.getApplicationContext();
    this.setTitle("NP Headline News");

    myListView=(ListView)findViewById(R.id.myListView);
    myListView.setOnItemClickListener(new OnItemClickListener(){

            @Override
        public void onItemClick(AdapterView<?> arg0, View v, int index,long id) {
                // TODO Auto-generated method stub
                String urlAddress=urlAddresses[index];
                String urlCaption = urlsCaptions[index];
            }

    });

  int layoutId=R.layout.simple_list_item_1;
   // int layoutId=android.R.layout.simple_list_item_1;
    aa = new ArrayAdapter<String>(this,layoutId,this.urlsCaptions);

    myListView.setAdapter(aa);
}

I think that it is something related to my simple_list_item_1 because if I use android.R.layout.simple_list_item_1 then every thing works ok

Answer 1

Here is your error cleared layout:

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/text1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:paddingLeft="10dip"
    android:textSize="18sp"
    android:minHeight="40sp"

    />

Can you able to differentiate your error contained code and this above one.

I wish you guys to don’t tense and urge while code something, that must be lead you to blocked and confused minded.

For these type of errors, you could use to debug yourself with the help of DDMS.
Because the code is very very simple to view right.

And some words about the previous answers:

Guys that is not necessary to declare a TextView or any View only inside of the Layout file.

It is also a View, So it can capable to sit alone in a Canvas.

And also the problem is not by the "fill_parent", and "match_parent" Something.

I think you might be tensed now also, because i am taking this much time to give you the reason of your error.

Here we go,

the error is because simply in the following line,

xmlns:android="http://schemas.android.com/apk/res/android"

In the above line you mistakenly typed scheme instead of schemas.

That is the error.

So only i mentioned if you had look at the code with out tense you can get it easily.

xmlns denotes the namespace , that should be proper in order make the android: prefixed attributes as valuable.

Hope you understand and the answer helpful to you.