Develop Reference

Adding LinearLayout to ListView using an adapter

I am trying to create a ListView where each entry in the list consists of a LinearLayout. I have an ArrayList that I have defined here:
ArrayList<LinearLayout> menuList;.
Later in my code, I define
LinearLayout dailyMenuLayout = new LinearLayout(ReturnMenus.this);, and every time I complete a layout to be added to the ListView, I use menuList.add(DailyMenuList)
The adapter that I have been trying to use is as follows -- but it crashes the app every time that it is triggered.
ListView myListView = (ListView)findViewById(android.R.id.list);
ArrayAdapter<LinearLayout> adapter = new ArrayAdapter<LinearLayout>(ReturnMenus.this, R.id.linear_layout_item, menuList);
myListView.setAdapter(adapter);
And this is the XML for the single row in the ListView:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/linear_layout_item"
android:layout_width="match_parent"
android:orientation="horizontal"
android:layout_height="wrap_content" >
</LinearLayout>
</LinearLayout>
Can somebody show me how to accomplish this? Thanks.

Use something like following layout for the row layout in your list rather than you current layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="#+id/text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="#+id/text3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
.
.
.
.
.
</LinearLayout>
Here if you do not know exactly how many textView that you are going to use, use maximum number of TextView that using in your application. Then in your adapter class inside getView() you can get those TextView. If some rows not going to use all of these textViews then set them invisible as like this:
TextView txtView3 = (TextView)findViewById(R.id.text3);
txtView3.setVisibility(View.GONE)
Following tutorial helps you to create the listView.
http://www.vogella.com/tutorials/AndroidListView/article.html

You should bind data to adapter,such as strings,not the layout.
To see how to use ListView and Adapter,please check the demo project in your-android-sdk-dir\samples\android-XX\ApiDemos.

how to get Spinner in ListView

There is a ListView in layout of my Activity.
listview_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ListView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/MyListView" />
</LinearLayout>
I am using another layout for ListItem of ListView.
listitem_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:id="#+id/RelativeLayout01"
android:layout_width="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="fill_parent">
<TextView
android:id="#+id/txtTitle"
android:layout_width="80dp"
android:layout_height="wrap_content" />
<Spinner
android:id="#+id/MySpinner"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
My Activity’s layout is the same with the listview_layout.xml’s.
I use SimpleAdapter cited the layout of listitem_layout.xml.
The problwm: Now I want to get the Spinner control ID of listview_layout.xm.
I use findViewById(MySpinner) in activity of ListView, it has the error of null pointer exception.
can not find. Because the Activity layout files use the listview_layout.xml’s and Spinner control in listview_layout.xml.
anyone's help is very thankful.

you cannot directly use the findViewById(spinnerId). You have to override the getView() method of Custom Adapter instead of Simple Adapter and inside that inflate the listitem_layout to a view(v) and then use v.findViewById(spinnerId).
Refer the below link which will help you in creating custom adapter (Weather Adapter in the link's example). in the example ImageView object is created in the GetView method. Instead of that you use Spinner.

how define a image in listview android?

I have a layout with this code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
style="#style/fundo"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/consoleListaSimples"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ListView
android:id="#+id/listaSimples"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ListView>
</LinearLayout>
and for which item from the list a have this xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="#drawable/bk_principal_small">
<LinearLayout
android:id="#+id/linearLayout2"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/imagemStatus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/green"/>
<TextView
android:id="#+id/texto1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/padrao" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>
and to create the itens I create a SimpleAdapter that I insert the data using the method ListAdapterCreater
this.adapter = new ListAdapterCreater(list.getContext(),itensList,
R.layout.list_simple_item,new String[] {"text","image"},
new int[]{R.id.texto1,R.id.imagemStatus});
to set the text works pretty, but doesn`t work for the image.
what have to be the value of image? or what should I change to works?

Refer the below links which have sample code snippets.
LINK1 it has one textview and one image view in each list item.
LINK2 it has two textview in each list item.
LINK3 it has two textview and one image view in each list item.

I believe you'll have to create new Adapter that extends BaseAdapter.
Here's a few tutorials for you:
http://blog.sptechnolab.com/2011/02/01/android/android-custom-listview-items-and-adapters/
http://w2davids.wordpress.com/android-listview-with-iconsimages-and-sharks-with-lasers/
If you look closely on those tutorials, the trick lies in how getView() work.

ListView's Item Layout error

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

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.

YOU should puy your TextView under a Layout, since your are using a unique TextView you could add a LinearLayout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<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"
/>
</LinearLayout>

I guess problem comes from something different.
You are doing a custom item view, but you use standard AdapterView.
For a standard arrayAdapter you need to fulfil the expected structure.
Alternatively you build an own ArrayAdapter and supply your dedicated getView
Android Custom Listview

Title bar in Android

My class extends a ListActivity, I would like to have a title bar just as "Sound settings" in the following image;
What would be the proper way to create such title.
Thank you for your time.

Creating custom layout can solve this problem.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
android:orientation="vertical"
<TextView android:id="#+id/textViewCategoriesTitle"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/categoriesTitle"
android:background="#123"
android:layout_gravity="center_horizontal"
android:textSize="30sp" />
<ListView android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:id="#+id/listViewCategories"
android:layout_gravity="center_vertical|center_horizontal" />
</LinearLayout>
Hope this can help.

You could add a header view to the list view :
getListView().addHeaderView(myTitleView);
I'm not sure how you can be sure to get the exact same look, though. I would try with just a basic layout containing a TextView and see how that works out.