Well, this is it gets interesting. This part of code is almost
completely from list14.java from sdk, and it is working. I am
disconnecting connection to server to simulate network error, which
should appear in textview (to let my user know that last update try
was at time, but unsuccessful). I am getting error at
stext.setText(sdf.format(cal.getTime()).toString()+ " chyba");
where it ends on null pointer exception. I tried to add:
setContentView(R.layout.main);
which required to add a listview named android:list. Now...it works
same way as before, it ends on same null pointer exception :)
On Oct 3, 11:00 pm, Streets Of Boston <flyingdutc...@gmail.com> wrote:
> It's quite a bit of code, but one thing's missing that you have to do:
>
> In your onCreate, you're not calling setContentView(...). You have to
> do this to show at least something :-)
>
> On Oct 3, 4:39 pm, vorcigernix <vorciger...@gmail.com> wrote:
>
> > Hello,
>
> > I didn't found clear answer for why my code does not work. I assume it
> > is because I am trying to update textview from runnable. Anybody know
> > some workaround? Code isn't clean off course, I am happy to get that
> > working so far as I am totally new in java.
>
> > public class MainScreenActivity extends ListActivity {
> > private Handler mHandler;
> > private String url = "http://sql08.globus.cz/turnovers/
> > turnoversuma.ashx";
> > static JSONArray valArray2;
> > public static final String DATE_FORMAT_NOW = "HH:mm:ss";
> > TextView stext;
>
> > private static class EfficientAdapter extends BaseAdapter {
> > private LayoutInflater mInflater;
> > private Bitmap mIcon1;
> > private Bitmap mIcon2;
>
> > public EfficientAdapter(Context context) {
> > try{
> > // Cache the LayoutInflate to avoid asking for a new one
> > each time.
> > mInflater = LayoutInflater.from(context);
>
> > // Icons bound to the rows.
> > mIcon1 = BitmapFactory.decodeResource(context.getResources
> > (), R.drawable.green);
> > mIcon2 = BitmapFactory.decodeResource(context.getResources
> > (), R.drawable.yellow);
> > }
> > catch (Exception e) {
> > Log.e("ERROR", "ERROR IN CODE:"+e.toString());
> > }
>
> > }
>
> > /**
> > * The number of items in the list is determined by the number
> > of speeches
> > * in our array.
> > *
> > * @see android.widget.ListAdapter#getCount()
> > */
> > public int getCount() {
>
> > try {
> > return valArray2.length();
> > } catch (Exception e) {
> > // TODO Auto-generated catch block
> > e.printStackTrace();
> > return 0;
> > }
> > }
>
> > /**
> > * Since the data comes from an array, just returning the
> > index is
> > * sufficent to get at the data. If we were using a more
> > complex data
> > * structure, we would return whatever object represents one
> > row in the
> > * list.
> > *
> > * @see android.widget.ListAdapter#getItem(int)
> > */
> > public JSONArray getItem(int position) {
> > JSONArray retobj = null;
> > try {
> > retobj = valArray2.getJSONArray(position);
> > } catch (JSONException e) {
> > // TODO Auto-generated catch block
> > e.printStackTrace();
> > }
> > return retobj;
> > }
>
> > /**
> > * Use the array index as a unique id.
> > *
> > * @see android.widget.ListAdapter#getItemId(int)
> > */
> > public long getItemId(int position) {
> > return position;
> > }
>
> > /**
> > * Make a view to hold each row.
> > *
> > * @see android.widget.ListAdapter#getView(int,
> > android.view.View,
> > * android.view.ViewGroup)
> > */
> > public View getView(int position, View convertView, ViewGroup
> > parent) {
> > // A ViewHolder keeps references to children views to
> > avoid unneccessary calls
> > // to findViewById() on each row.
> > ViewHolder holder;
>
> > // When convertView is not null, we can reuse it directly,
> > there is no need
> > // to reinflate it. We only inflate a new View when the
> > convertView supplied
> > // by ListView is null.
> > holder = new ViewHolder();
>
> > try {
> > if (convertView == null) {
> > convertView =
> > mInflater.inflate(R.layout.list_item_icon_text,
> > null);
>
> > // Creates a ViewHolder and store
> > references to the two
> > children views
> > // we want to bind data to.
>
> > holder.text = (TextView)
> > convertView.findViewById(R.id.text);
> > holder.text2 = (TextView)
> > convertView.findViewById
> > (R.id.text2);
> > holder.icon = (ImageView)
> > convertView.findViewById(R.id.icon);
>
> > convertView.setTag(holder);
> > } else {
> > // Get the ViewHolder back to get fast
> > access to the TextView
> > // and the ImageView.
> > holder = (ViewHolder)
> > convertView.getTag();
> > }
> > } catch (Exception e1) {
> > // TODO Auto-generated catch block
> > e1.printStackTrace();
> > }
>
> > // Bind the data efficiently with the holder.
>
> > try {
> > String rowString = "[" + valArray2.getString(position) +
> > "]";
> > JSONArray rowArr = new JSONArray(rowString);
> > JSONObject rowobj = rowArr.getJSONObject(0);
>
> > holder.text.setText(rowobj.getString("BranchName"));
> >
> > holder.text2.setText(rowobj.getString("BranchValue"));
> > holder.icon.setImageBitmap((position & 1)
> > == 1 ? mIcon1 : mIcon2);
> > } catch (JSONException e) {
> > // TODO Auto-generated catch block
> > e.printStackTrace();
> > }
>
> > notifyDataSetChanged();
>
> > return convertView;
>
> > }
>
> > static class ViewHolder {
> > TextView text;
> > TextView text2;
> > ImageView icon;
> > }
> > }
>
> > @Override
> > public void onCreate(Bundle savedInstanceState) {
> > super.onCreate(savedInstanceState);
> > stext = (TextView)findViewById(R.id.statustext);
> > mHandler = new Handler();
> > checkUpdate.start();
>
> > }
>
> > private Runnable showUpdate = new Runnable(){
> > public void run(){
> > Calendar cal = Calendar.getInstance();
> > SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_NOW);
>
> > try {
> > setListAdapter(new
> > EfficientAdapter(MainScreenActivity.this));
> >
> > stext.setText(sdf.format(cal.getTime()).toString()+ " ok");
>
> > } catch (Exception e) {
> >
> > stext.setText(sdf.format(cal.getTime()).toString()+ " chyba");
> > e.printStackTrace();
>
> > }
>
> > }
> > };
> > private static String convertStreamToString(InputStream is) {
> > /*
> > * To convert the InputStream to String we use the
> > BufferedReader.readLine()
> > * method. We iterate until the BufferedReader return null
> > which means
> > * there's no more data to read. Each line will appended to a
> > StringBuilder
> > * and returned as String.
> > */
> > BufferedReader reader = new BufferedReader(new
> > InputStreamReader(is));
> > StringBuilder sb = new StringBuilder();
>
> > String line = null;
> > try {
> > while ((line = reader.readLine()) != null) {
> > sb.append(line + "\n");
> > }
> > } catch (IOException e) {
> > e.printStackTrace();
> > } finally {
> > try {
> > is.close();
> > } catch (IOException e) {
> > e.printStackTrace();
> > }
> > }
> > return sb.toString();
> > }
>
> > private Thread checkUpdate = new Thread() {
> >
>
> ...
>
> read more »
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to android-developers@googlegroups.com
To unsubscribe from this group, send email to
android-developers+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en
-~----------~----~----~----~------~----~------~--~---
