Question

How do I get my whole backgroundpage white?
I have a listview and tried to set the backgroundcolor white in the xml but
it didn’t worked.
These are my xmls:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<ListView 
android:id="@+id/list" android:layout_width="fill_parent" 
android:clickable="true" android:layout_height="fill_parent"></ListView>

The only thing that actually gets white is this:

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/naam" android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:textSize="16sp" >
</TextView>

this is my java code:

public class Contactenlijst extends ListActivity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    final HashMap<Integer, Personeel> personeelmap = new HashMap<Integer, Personeel>();
    ArrayList<String> list = new ArrayList<String>();
    // Get the data (see above)

    JSONObject json = Database
            .getJSONfromURL("http://fabian.nostradamus.nu/Android/getcontactinfo.php");

    try {
        JSONArray contactinfo = json.getJSONArray("contactlijst");
        // Loop the Array
        for (int i = 0; i < contactinfo.length(); i++) {

            JSONObject e = contactinfo.getJSONObject(i);
            Personeel p = new Personeel(
                    Integer.parseInt(e.getString("id")),
                    e.getString("staff_name"),
                    e.getString("staff_lastname"),
                    e.getString("staff_dateofbirth"),
                    e.getString("staff_address"),
                    e.getString("staff_address_postal"),
                    e.getString("staff_address_city"),
                    e.getString("staff_mobile"));
            personeelmap.put(Integer.parseInt(e.getString("id")), p);
            list.add(p.toString());
        }

    } catch (JSONException e) {
        Log.e("log_tag", "Error parsing data " + e.toString());
    }

    setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, list));
    ListView lv = getListView();
    lv.setTextFilterEnabled(true);

    // onclick stuur array naar contactinfo

    lv.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {

            String text = ((TextView) view).getText().toString();
            Intent i = new Intent(Contactenlijst.this, Contactinfo.class);
            String uittekst[] = text.split(" ");
            String vnaam = uittekst[0].toString();

            ArrayList<String> al = new ArrayList<String>();
            int a = personeelmap.size();

            a = a + 1;
            for (int c = 1; c < a; c++) {

                if (personeelmap.get(c).getStaff_name().toString()
                        .equals(vnaam)) {
                    al.add(personeelmap.get(c).getStaff_name());
                    al.add(personeelmap.get(c).getStaff_lastname());
                    al.add(personeelmap.get(c).getDateofbirth());
                    al.add(personeelmap.get(c).getStaff_address());
                    al.add(personeelmap.get(c).getStaff_address_postal());
                    al.add(personeelmap.get(c).getStaff_address_city());
                    al.add(personeelmap.get(c).getStaff_mobile());
                }
                ;
            }

            i.putStringArrayListExtra("array", al);
            startActivity(i);
        }
    });
}

}

Answer 1

There is a very easy way to do this.

First, create a ListView variable in your activity (above onCreate):

ListView LV = null;

Then in onCreate to set the variable you can do this, assuming you extend ListActivity:

LV = getListView();

or this works instead assuming mylist id is set in XML to the listview:

LV = (ListView) findViewById(R.id.mylist);

finally, set the background to a color:

LV.setBackgroundColor(Color.WHITE);

or set it to a drawable:

int r = getResources().getIdentifier("subtle_white_gradient", "drawable", "com.my.package");
LV.setBackgroundResource(r);