listview with arraylist,simple adapter in android

Question

I try to show something into listview using arraylist and simple adapter. I tried something like below but in my result shows the last names of the arraylist. What is my wro

Answer 1

You're reusing the same view in your int[] object.

int[] to = { R.id.txt1,R.id.txt1,R.id.txt1,R.id.txt1};

It looks like it's treating them all as the same object, so each time it adds a new item it changes the previous ones.

In order to use the SimpleAdapter you will need to define each view in the XML with different IDs.

int[] to = { R.id.txt1,R.id.txt2,R.id.txt3,R.id.txt4};

The SimpleAdapter may be simpler in regard to it's internal complexity, but it's definitely not simpler to actually use. With an ArrayAdapter you can just pass it the list of items and let it generate views automatically. It can be any size you need it to be so long as you don't run out of memory. (See below for example)

Once you start working with custom adapters I highly recommend you watch Romain Guy & Adam Powell's I/O talk. It's all a lot to take in when learning, but they do a great job of explaining how ListViews work.

//List of Items
String[] name_of_bookmarks = { "php","c","android","hacking" };

//Create your List object for the ArrayAdapter
//and make it the same size as name_of_books
List listBookmarks = new ArrayList(Array.getLength(name_of_bookmarks));

//Add name_of_bookmarks contents to listBookmarks
Collections.addAll(listBookmarks, name_of_books);

//Create an ArrayAdapter passing it the Context, a generic list item and your list
//An alternative to "this" would be "getApplicationContext()" from your main activity
//or "getActivity()" from a fragment. "getBaseContext()" is not recommended.
ArrayAdapter arrayAdapter = new ArrayAdapter(this, R.layout.list_item_text, listBookmarks);

//Set the adapter to your ListView
final ListView listView = (ListView) findViewById(R.id.mylist);
listView.setAdapter(arrayAdapter);