Develop Reference

Thumbnail with an Array adapter in a list view

Is it possible to show a thumbnail with a Array adapter in a list? The thumbnail is always the same.
final ArrayAdapter myAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1 );
ListView myList = (ListView) findViewById(R.id.list);
myList.setAdapter(myAdapter);
I populate my list with volley.

ArrayAdapter is usually used for populating a ListView widget from array or list of primitive values like String. When you are creating an ArrayAdapter with ArrayAdapter myAdapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1 ); as the second parameter you have R.layout.simple_list_item_1 which is a layout with only one TextView, so if you need a ImageView alongside a TextView, you will need to create new view that will contain TextView and ImageView widgets and create custom class that will extend Adapter where you will use the newly created view and populate it's views with your content.

Using listView and spinner in 1 layout

I use listview with cursor adapter and spinner in 1 layout.
I don't know how to use setAdapter into these 2 different thing.
Spinner sp = (Spinner) findViewById(R.id.spinner);
SpinnerAdapter adapter = new SpinnerAdapter(this, R.layout.spinner_layou, R.id.txt, item);
//sp.setAdapter(adapter); <----- I should have to set my spinner adapter here, but it seems to make it crash
cursorAdapter = new NotesCursorAdapter(this, null, 0); //my own class which extend CursorAdapter
ListView list = (ListView) findViewById(android.R.id.list);
list.setAdapter(cursorAdapter);
I have google it and find some clue by using ArrayAdapter. But what i found is ArrayAdapter used for the same type adapter (in my case, I use 2 different adapter(Spinner and CursorAdapter) CMIIW. Is anyone can help me on this?

Populating ListView with ArrayAdapter force closes

I am trying to use the following code to populate a ListView using a predefined array of strings:
String[] schedule_names = getResources().getStringArray(R.array.test_schedules);
// Populate the ListView using the array of schedule names
ArrayList<String> als = new ArrayList<String>(Arrays.asList(schedule_names));
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.id.listView, als);
adapter.add("Test");
ListView listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(adapter);
But it force closes unless I comment out listView.setAdapter(adapter); (which obviously means the ListView isn't populated at all). It seems the reason is a NullPointerException.
Why is this?

This line is wrong...
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.id.listView, als);
...the second parameter of the constructor should not be your ListView, it should be a layout with a TextView.
Try replacing R.id.listView with android.R.layout.simple_list_item_1

Adapt ArrayList into ListView

I have a XML File and I had parsed the data into the textView successfully now I want to bind that data into the ArrayList or List and display it in ListView.
But I don't know how to bind arraylist data into the ListView.
I have added all data into the arraylist successfully as mentioned in the below code.
List al = new ArrayList();
al.add(parser.getAttributeValue(null, "firstnames"));
Kindly please help me with the code syntax for the above issue.
Regards .
Thanks in advace

please have a look at the sample at http://codinglookseasy.blogspot.in/2012/07/android-list-view-sample.html
Instead of this
aa = new ArrayAdapter(this,
android.R.layout.simple_list_item_1, months);
setListAdapter(aa);
use this in your case
aa = new ArrayAdapter(this,
android.R.layout.simple_list_item_1, al);
setListAdapter(aa);

You need to use an Adapter to bind a List to a ListView, like this:
List<String> list = new ArrayList<String>();
// add data to list
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list);
ListView listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(adapter);
Notice that the subtype of List (which is String) matches the subtype of the ArrayAdapter (also String). The layout android.R.layout.simple_list_item_1 defines how the String is displayed in every row. You can look up the specifics of this layout in your SDK, if you want you can also use you own layout. Hope that helps, good luck learning Android!

Android ListView setAdapter issue

I'm trying to bind data do a listview on android, but I'm not able to.
I saw some code on the internet and it worked, but I just don't know why, and I don't want to create a new ListView on the fly, I want to use the one that is listed on the main.xml
Why I can do this:
ListView lv = new ListView(this);
lv.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,PEOPLE));
setContentView(lv);
But I can't do this:
ListView listPessoas = (ListView) findViewById(R.id.listPessoas);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.id.listPessoas, PESSOAS);
listPessoas.setAdapter(adapter);

What is R.id.pessoas??
This works fine for me:
String[] x = new String[]{"AAA","BBB","CCC"};
ListView lv = (ListView) findViewById(R.id.listView1);
ArrayAdapter<String> test = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,x);
lv.setAdapter(test);

Your error here is when you are creating the new ArrayAdapter. You are passing R.id.listPessoas as the row view to use for each row. This is the id of the ListView. The adapter is looking for a layout id containing a text view to be used for each row of the list. Change the R.id.listPessoas to android.R.layout.simple_list_item_1 and your code should work. The simple_list_item_1 layout is just a TextView that the data will be bound to.

What you have written is not correct, the second parameter in the array adapter constructor should be the simple layout for each list item not again your list view.
If your have a custom complex layout for your list item you need to write a custom adapter as well.

If you are getting error.
getApplicationContext(); will work instead of 'this'.