Question

I have, the following class.

public class BkmCollect extends ArrayList<Bkmark> {

    public static BkmCollect getTestBkm(Context context) {
        BkmCollect bookmarks = new BkmCollect ();

        String[] titles  = context.getResources().getStringArray(R.array.bookmark_titles);
        String[] urls    = context.getResources().getStringArray(R.array.bookmark_urls);
        TypedArray icons = context.getResources().obtainTypedArray(R.array.bookmark_icons);

        for (int i = 0; i < titles.length; i ++) {
            bookmarks.add(titles[i], urls[i], icons.getDrawable(i));
        }

        return bookmarks;
    }
}

The “add” method is implemented at this class. And the “Bkmark” class is another class created at my project.
I want to create a ListView that will get the data from the BkmCollect.getTestBkm method. How can I do this inside my onCreate method? Thanks!

XML file that contain the fields to be inserted at the ListView:

<resources>
    <string-array name="bookmark_titles">
        <item>Google</item>
        <item>Bing</item>
        <item>Gmail</item>
    </string-array>

    <string-array name="bookmark_urls">
        <item>http://www.google.com</item>
        <item>http://www.bing.com/</item>
        <item>http://www.gmail.com</item>
    </string-array>

    <array name="bookmark_icons">
        <item>@drawable/google</item>
        <item>@drawable/bing</item>
        <item>@drawable/gmail</item>
    </array>
</resources>

I am trying to do something like this:

ListView lv = (ListView) findViewById(R.id.favoritos_listView);
ArrayAdapter adapter;
Context context = getApplicationContext();
ArrayList<Bkmark> my_array = BkmCollect .getTestBkm(context);
adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, my_array);
lv.setAdapter(adapter);

enter code here

Answer 1

Create a ListView in your layout.xml file, and retrieve it in java by doing a

ListView lv = (ListView)findViewById(R.id.your_list_view_id);

and populate the listview by doing this:

ArrayList<String> my_array_list = new ArrayList<String>();
new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, my_array_list);
lv.setAdapter(arrayAdapter); 

EDIT

Say for instance that you have a method where you add some object to an ArrayList

public ArrayList<String> getPopulatedArrayList() {
    ArrayList<String> myList = new ArrayList<String>();
    myList.add("One");
    myList.add("Two");
    myList.add("Three");

    return myList; 
}

And in you onCreate method

ArrayAdapter adapter;
ListView lv;
lv = (ListView)findViewById(R.id.my_list);

ArrayList<String> list = getPopulatedArrayList(); 
adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, list);
lv.setAdapter(adapter); 

Remeber that this only works for List with one TextView, if you need more data in your list, you should create your own class which extends BaseAdapter. An example on this can be found here

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