I am fetching data from url and storing it in arraylist and displaying that content in tab(using action bar).The problem is app is crashing when internet connection gets enabled after it gets disabled because size of arraylist its getting is 0. The code that I have implemented is-
class stopOffer extends AsyncTask<String,String,ArrayList<HashMap<String,String>>>
{
int flag=1;
@Override
protected void onPreExecute()
{
super.onPreExecute();
}
@Override
protected ArrayList<HashMap<String,String>> doInBackground(String... urls)
{
stopOffer=new ArrayList<HashMap<String,String>>();
String url = urls[0];
try
{
for (int k= 0; k<info.length; k++)
{
if (info[k].getState() == NetworkInfo.State.CONNECTED)
{
InputStream in = new java.net.URL(url).openStream();
BufferedReader reader = null;
reader = new BufferedReader(new InputStreamReader(in, "UTF-8"));
StringBuilder sb = new StringBuilder();
String append = sb.append(reader.readLine() + "\n").toString();
getDataBeforeHash = append.split("#");
len = getDataBeforeHash.length;
getDataBeforeComma=new String[len][];
for (int i = 0; i < len; i++)
{
getDataBeforeComma[i] = getDataBeforeHash[i].split(",");
lenBeforeComma=getDataBeforeComma[i].length;
HashMap<String,String> stopOfferMap=new HashMap<String,String>();
for(int j=0;j<getDataBeforeComma[i].length;j++)
{
if(j==0)
{
stopOfferMap.put("id",getDataBeforeComma[i][j]);
}
else if(j==1)
{
stopOfferMap.put("name",getDataBeforeComma[i][j]);
}
else if(j==2)
{
stopOfferMap.put("count",getDataBeforeComma[i][j]);
}
else if(j==3)
{
stopOfferMap.put("amount",getDataBeforeComma[i][j]);
}
}
stopOffer.add(stopOfferMap);
}
}
}
}
catch (IOException e)
{
flag=0;
// TODO Auto-generated catch block
e.printStackTrace();
}
return stopOffer;
}
@Override
protected void onPostExecute(ArrayList<HashMap<String,String>> stopOffer)
{
if(flag==0)
{
getActivity().runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getActivity(),
"Unable to connect to server",
Toast.LENGTH_SHORT).show();
}
});
}
else
{
tr=new TableRow[len];
id=new String[len];
name=new String[len];
Log.e("size stop",""+stopOffer.size());
for (int i = 0; i < len; i++)
{
id[i] = stopOffer.get(i).get("id");
name[i] = stopOffer.get(i).get("name");
cnt = stopOffer.get(i).get("count");
amt = stopOffer.get(i).get("amount");
idOffer=stopOffer.get(i).get("id");
nameOffer=stopOffer.get(i).get("name");
tr[i] = new TableRow(getActivity());
tr[i].setId(i);
if (i % 2 == 0)
tr[i].setBackgroundColor(Color.WHITE);
else
tr[i].setBackgroundColor(Color.parseColor("#b6d6eb"));
tr[i].setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT));
TextView OfferId1 = new TextView(getActivity());
OfferId1.setText(id[i]);
OfferId1.setTextColor(Color.BLACK);
OfferId1.setPadding(5, 5, 5, 5);
tr[i].addView(OfferId1);// add the column to the table row here
TextView OfferName = new TextView(getActivity());
OfferName.setText(name[i]); // set the text for the header
OfferName.setTextColor(Color.BLACK); // set the color
OfferName.setPadding(5, 5, 5, 5); // set the padding (if
// required)
tr[i].addView(OfferName); // add the column to the table row
TextView totCountRunning = new TextView(getActivity());
totCountRunning.setText(cnt); // set the text for the header
totCountRunning.setTextColor(Color.BLACK); // set the color
totCountRunning.setPadding(5, 5, 5, 5); // set the padding
// (if
// required)
tr[i].addView(totCountRunning); // add the column to the table
// row here
TextView totAmtRunning = new TextView(getActivity());
totAmtRunning.setText(amt); // set the text for the header
totAmtRunning.setTextColor(Color.BLACK); // set the color
totAmtRunning.setPadding(5, 5, 5, 5); // set the padding (if
// required)
tr[i].addView(totAmtRunning); // add the column to the table
// row here
tl.addView(tr[i], new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT));
db.insertStopDetails(idOffer, nameOffer, cnt, amt);
tr[i].setOnLongClickListener(new OnLongClickListener()
{
@Override
public boolean onLongClick(View v)
{
// TODO Auto-generated method stub
idTr=v.getId();
dialog=new Dialog(getActivity());
dialog.setContentView(R.layout.enable_disable_offer);
CheckBox cb=(CheckBox)dialog.findViewById(R.id.checkBoxEnableDisable);
final Button ok=(Button)dialog.findViewById(R.id.buttonOK);
final Button cancel=(Button)dialog.findViewById(R.id.buttonCancel);
cb.setText("Enable Offer:"+" "+name[idTr]);
dialog.setTitle("Enable Offer");
if(cb.isChecked())
{
ok.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
setConnection();
// add your data
nameValuePairs = new ArrayList<NameValuePair>(3);
nameValuePairs.add(new BasicNameValuePair("flag", "1"));
nameValuePairs.add(new BasicNameValuePair("offerName",id[idTr]));
nameValuePairs.add(new BasicNameValuePair("OfferStatus","1"));
enableOffer();
dialog.cancel();
}
});
cancel.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
dialog.cancel();
}
});
}
else
{
ok.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
dialog.cancel();
}
});
cancel.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
dialog.cancel();
}
});
}
dialog.show();
return true;
}
});
}
}
}
}
I am calling this class from onCreateView if internet is available.
Logcat-
10-13 13:44:37.059: E/AndroidRuntime(4677): FATAL EXCEPTION: main
10-13 13:44:37.059: E/AndroidRuntime(4677): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
10-13 13:44:37.059: E/AndroidRuntime(4677): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)
10-13 13:44:37.059: E/AndroidRuntime(4677): at java.util.ArrayList.get(ArrayList.java:304)
10-13 13:44:37.059: E/AndroidRuntime(4677): at info.rh.dashboard.RunningOfferFragment$dataRunningStopOffer.onPostExecute(RunningOfferFragment.java:635)
10-13 13:44:37.059: E/AndroidRuntime(4677): at info.rh.dashboard.RunningOfferFragment$dataRunningStopOffer.onPostExecute(RunningOfferFragment.java:1)
10-13 13:44:37.059: E/AndroidRuntime(4677): at android.os.AsyncTask.finish(AsyncTask.java:631)
10-13 13:44:37.059: E/AndroidRuntime(4677): at android.os.AsyncTask.access$600(AsyncTask.java:177)
10-13 13:44:37.059: E/AndroidRuntime(4677): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
10-13 13:44:37.059: E/AndroidRuntime(4677): at android.os.Handler.dispatchMessage(Handler.java:99)
10-13 13:44:37.059: E/AndroidRuntime(4677): at android.os.Looper.loop(Looper.java:176)
10-13 13:44:37.059: E/AndroidRuntime(4677): at android.app.ActivityThread.main(ActivityThread.java:5319)
10-13 13:44:37.059: E/AndroidRuntime(4677): at java.lang.reflect.Method.invokeNative(Native Method)
10-13 13:44:37.059: E/AndroidRuntime(4677): at java.lang.reflect.Method.invoke(Method.java:511)
10-13 13:44:37.059: E/AndroidRuntime(4677): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
10-13 13:44:37.059: E/AndroidRuntime(4677): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
10-13 13:44:37.059: E/AndroidRuntime(4677): at dalvik.system.NativeStart.main(Native Method)
