Still I am confused How I will check whether that list contains particular EmpId number or not? Means if there is no record for that particular empId then I am going to create new row but if it is present then I will only update that particulars row's value.
On May 25, 2:27 pm, Daniel Drozdzewski <[email protected]> wrote: > Pramod, > > you are creating new ArrayList that backs new SimpleAdapter every time > you receive an update, hence all there is to display is only what came > with the update. Activity should have one Adapter per ListView and > both of those should not be re-created, but created once and the > updated, when needed. > > Your ListView and Adapter are used wrongly. > > Please read tutorials on both of those. > > > > > > On Wed, May 25, 2011 at 9:46 AM, pramod.deore <[email protected]> > wrote: > > Yes Daniel I will try some sample code side by side but it will be > > great if you help to solve this tragidy. Look at my code: > > > private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() > > { > > @Override > > public void onReceive(Context context, Intent intent) > > { > > String res = intent.getStringExtra("Response"); > > System.out.println ("***********************************"); > > System.out.println (res); > > > if (res.length() == 0) > > { > > //Response has not changed > > System.out.println("value is null................."); > > } > > > else > > { > > String delims = "\\^"; > > > tokens = res.split(delims); > > > for (int i=0;i<tokens.length;i++) > > { > > System.out.println("At "+i+" Value is "+tokens[i]); > > } > > > if (tokens[1].equalsIgnoreCase("1")) > > > { > > > //write code for empId is exist already or not? If > > exist then > > update row else create new row > > showList(); > > > } > > > else > > { > > //Don't this record to listview > > } > > } > > > } > > }; > > > public void showList() > > { > > > ArrayList<HashMap<String, String>> mylist = new > > ArrayList<HashMap<String, String>>(); > > HashMap<String, String> map = new HashMap<String, > > String>(); > > map.put("EmpId", tokens[2]); > > map.put("Name", tokens[4]); > > map.put("MobNo", tokens[5]); > > > mylist.add(map); > > // ... > > SimpleAdapter mSchedule = new SimpleAdapter(this, > > mylist, > > R.layout.listcolumns, > > new String[] {"EmpId", "Name", "MobNo"}, > > new int[] > > {R.id.EmpId, R.id.Name, R.id.MobNo}); > > list.setAdapter(mSchedule); > > } > > > Now using this code listview updated continously but it shows only one > > updated record. Means suppose first record is like: > > > EmpId EmpName MobNo City ..... Gender > > > 1 Pramod 789 Nasik M > > > and suppose server send second record then first record is gone and > > shows only one record as: > > > EmpId EmpName MobNo City ..... Gender > > > 1 1 Tom 456 NY M > > > On May 25, 1:29 pm, Daniel Drozdzewski <[email protected]> > > wrote: > >> Pramod, > > >> You have to read up on ListView and some Adapter that backs the > >> ListView providing it with data. > > >> When you receive new set of data to be displayed or your data has > >> changed, you call BaseAdapter.notifyDataSetChanged() to notify the > >> associated ListView to redraw all visible items. > > >> ListView and Adapter are powerful, hence not easy to grasp at the > >> beginning, so you have to go through some tutorial first, if you want > >> to use them. > > >> On Wed, May 25, 2011 at 9:18 AM, pramod.deore <[email protected]> > >> wrote: > >> > Hi actually I am getting a string with some delimilater. Now using > >> > split() I am split that response. after spliting I am getting string > >> > array of size 40. I am not going to display all 40 fields. I will show > >> > near about 10 fields. > > >> > Once again let me explain what I want: > > >> > Using socket connection I am receiving response from server. I want to > >> > display this response in list. This list contains say 10 columns. > >> > Suppose first two records as > > >> > EmpId EmpName MobNo City ..... Gender > > >> > 1 Pramod 789 Nasik M > >> > 1 1 Tom 456 NY M > > >> > Now suppose next record again for EmpId 1 then other fields will > >> > change and it will be: > > >> > EmpId EmpName MobNo City ..... Gender > > >> > 1 Deore 789 Nasik M > >> > 1 1 Tom 456 NY M > > >> > Now suppose server send again some data with EmpId which is not exist > >> > above then it must have to add this new record.And it will be > > >> > EmpId EmpName MobNo City ..... Gender > > >> > 1 Deore 789 Nasik M > >> > 1 1 Tom 456 NY M > >> > 45 Rob 123 XYZ M > > >> > Now how to achieve this? > > >> > On May 25, 12:33 pm, Nikolay Elenkov <[email protected]> > >> > wrote: > >> >> On Wed, May 25, 2011 at 4:15 PM, pramod.deore > >> >> <[email protected]> wrote: > > >> >> > On May 25, 12:08 pm, Nikolay Elenkov <[email protected]> > >> >> > wrote: > >> >> >> On Wed, May 25, 2011 at 4:01 PM, pramod.deore > >> >> >> <[email protected]> wrote: > >> >> >> > Hi Ravi thanks for reply. actually it will becomes more > >> >> >> > complicated. > >> >> >> > Because server is sending data 2-3 times within a second And it > >> >> >> > will > >> >> >> > not be good idea to store data such a frequently. > > >> >> >> > Can somebody please provide me a guideline How I can check whether > >> >> >> > some key (here Name ) is already exist in listview? > > >> >> >> If you don't have much data to deal with it, it might be easier to > >> >> >> just replace everything and re-display. It doesn't really matter > >> >> >> what exactly changed. > > >> >> > Actually I am dealing with huge data. In above code just show a sample > >> >> > of three fields but there are more than 40 fields. > > >> >> Why is top-posting the norm on this list? Please write your reply > >> >> *below* > >> >> the previous one, so it reads like a conversation. Trimming also helps. > > >> >> How are you going to display 40 fields in a ListView? It doesn't really > >> >> matter > >> >> though, you usually care if a particular row/record changed and > >> >> update/replace > >> >> the whole record in your model/adapter. If you want to be able replace a > >> >> particular record, use some key (e.g., the employee ID) to search for > >> >> it, > >> >> and update/replace it.- Hide quoted text - > > >> >> - Show quoted text - > > >> > -- > >> > You received this message because you are subscribed to the Google > >> > Groups "Android Developers" group. > >> > To post to this group, send email to [email protected] > >> > To unsubscribe from this group, send email to > >> > [email protected] > >> > For more options, visit this group at > >> >http://groups.google.com/group/android-developers?hl=en > > >> -- > >> Daniel Drozdzewski- Hide quoted text - > > >> - Show quoted text - > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected] > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > -- > Daniel Drozdzewski- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
