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() {
public void run() {
HttpClient httpclient = new DefaultHttpClient();
// Prepare a request object
HttpGet httpget = new HttpGet(url);
// Execute the request
HttpResponse response;
try {
response = httpclient.execute(httpget);
// Examine the response status
// Get hold of the response entity
HttpEntity entity = response.getEntity();
// If the response does not enclose an entity, there
is no need
// to worry about connection release
if (entity != null) {
// A Simple JSON Response Read
InputStream instream = entity.getContent();
String result= convertStreamToString(instream);
valArray2 = new JSONArray(result);
// Closing the input stream will trigger
connection release
instream.close();
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mHandler.postDelayed(checkUpdate, 100000);
mHandler.post(showUpdate);
};
};
}
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