Re: ArrayAdapter
On 02/04/2011 23:50, Lawrence D'Oliveiro wrote:
In message<8vonp8FvbaU4@mid.individual.net>, Dirk Bruere at NeoPax wrote:
What does passing context to a class mean if every item and method in it
is static?
You don???t have to pass any arguments to your own method calls that you don???t
need.
If the system is calling you, that???s a different matter. But then you
usually just pass the same arguments to super.whatever, do your own
processing on what you want and ignore the rest.
This bit of code works in that the adapter is set on the listview with
no problems
public class controller extends Activity
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Context currentContext = this;
//@SuppressWarnings("unused")
//final Data data = new Data(currentContext);
ArrayAdapter<String> myAdapter;
ListView lvRadio;
ArrayList<String> radioTitleArrayList = new ArrayList<String>();
lvRadio = (ListView)findViewById(R.id.ListViewRadio);
lvRadio.setClickable(true);
lvRadio.setOnItemClickListener(new
AdapterView.OnItemClickListener() {
@Override public void onItemClick(AdapterView<?> lv, View view,
int arg2, long arg3) { BlinkAPI.playNetRadio(arg2); }});
myAdapter = new
ArrayAdapter<String>(this,android.R.layout.simple_expandable_list_item_1,radioTitleArrayList);
lvRadio.setAdapter(myAdapter);
}
}
//************************
public class controller extends Activity
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Context currentContext = this;
@SuppressWarnings("unused")
final Data data = new Data(currentContext);
ArrayAdapter<String> myAdapter;
ListView lvRadio;
lvRadio = (ListView)findViewById(R.id.ListViewRadio);
lvRadio.setClickable(true);
lvRadio.setOnItemClickListener(new
AdapterView.OnItemClickListener() {
@Override public void onItemClick(AdapterView<?> lv, View view,
int arg2, long arg3) { BlinkAPI.playNetRadio(arg2); }});
}
}
//This bit of code crashes out when the list adapter is set in
setRadioTitleAdapterListView(), which is called from another thread
public class Data
{
static ListView radioLV;
static public ArrayAdapter<String> radioTitleAdapter;
private static Context mContext;
public static ArrayList<String> radioTitleArrayList = new
ArrayList<String>();
public Data( Context ctx)
{
mContext = ctx;
radioLV = (ListView )((Activity)
mContext).findViewById(R.id.ListViewRadio);
radioTitleAdapter = new ArrayAdapter<String>(mContext,
android.R.layout.simple_expandable_list_item_1,radioTitleArrayList);
}
public static void setRadioTitleAdapterListView()
{
radioLV.setAdapter(radioTitleAdapter);
radioTitleAdapter.notifyDataSetChanged();
}
}
//*******************
I can fill radioTitleArrayList with data.
As far as I can tell the context passed in is the same as in onCreate.
Ditto lvRadio is the same as radioLV
It's the action of setting the adapter that causes it to fail
Is there anything I am obviously doing wrong?
--
Dirk
http://www.neopax.com/technomage/ - My new book - Magick and Technology