Automatically refresh listview on sqlite database change - Chat Application Android -
i building chat application response in broadcastreceiver. send data intentservice insert data sqlite database. refresh listview in fragment according database change automatically. list populated using cursoradapter.
my code massageview fragment follows:
public class messageview_fragment extends fragment { view rootview; listview lv; chatlistadapter chatadapter; arraylist<message_master> arr; matrixcursor cr; dbhelper db; static string rmob; actionmode actionmode; sharedpreferences prefs; simpledateformat sdf,sdf_old,sdf_today; framelayout attacher; boolean isbottom = true; @suppresslint("defaultlocale") @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) { // todo auto-generated method stub rootview = inflater.inflate(r.layout.fragment_message, container, false); getactivity().getwindow().setbackgrounddrawableresource(r.drawable.chat_back); rmob = getarguments().getstring("rmob"); log.e("rmob", rmob); lv= (listview)rootview.findviewbyid(r.id.chat_msg_list); db = new dbhelper(getactivity()); db.updateunseentoseen(long.valueof(rmob)); contact_master cm = db.getcontactdetails(rmob); actionbar mactionbar = ((actionbaractivity)getactivity()).getsupportactionbar(); mactionbar.setdisplayshowhomeenabled(true); mactionbar.setdisplayshowtitleenabled(false); layoutinflater minflater = layoutinflater.from(getactivity()); view mcustomview = minflater.inflate(r.layout.custom_action_bar_chat, null); roundedimageview prof_pic = (roundedimageview)mcustomview.findviewbyid(r.id.imageview1); textview tv_name = (textview)mcustomview.findviewbyid(r.id.textview1); if(cm.getname() == null) { tv_name.settext(rmob); } else { tv_name.settext(cm.getname()); } textview tv_details = (textview)mcustomview.findviewbyid(r.id.textview2); tv_details.settext(cm.getstatus()); mactionbar.setcustomview(mcustomview); mactionbar.setdisplayshowcustomenabled(true); attacher = (framelayout)rootview.findviewbyid(r.id.attacher); prefs = getactivity().getsharedpreferences(splashscreen_activity.myprefs, context.mode_private); sdf = new simpledateformat("dd mmm"); sdf_old = new simpledateformat("mmmm dd, yyyy"); sdf_today = new simpledateformat("h:mm a"); arr = db.getmessages(rmob); cr = new matrixcursor(new string[]{"_id","msg","type","dt","stat"}); boolean timeadded = false; if(arr.size()>0) { calendar c = calendar.getinstance(); for(int = 0; i<arr.size();i++) { if(arr.get(i).gettype() == 0) { cr.addrow(new string[]{string.valueof(arr.get(i).getid()),arr.get(i).getmsg(),"0", sdf.format(arr.get(i).getmsgtime()),arr.get(i).getstatus()}); } else { cr.addrow(new string[]{string.valueof(arr.get(i).getid()),arr.get(i).getmsg(),"1",sdf.format(arr.get(i).getmsgtime()),arr.get(i).getstatus()}); } } } chatadapter = new chatlistadapter(getactivity(),cr); lv.setadapter(chatadapter); chatadapter.notifydatasetchanged(); final emojiconedittext emojiconedittext = (emojiconedittext) rootview.findviewbyid(r.id.msg_edit); final imagebutton emojibutton = (imagebutton) rootview.findviewbyid(r.id.smiley_btn); final imagebutton submitbutton = (imagebutton) rootview.findviewbyid(r.id.send_btn); //on submit, add edittext text listview , clear edittext submitbutton.setonclicklistener(new onclicklistener() { @override public void onclick(view v) { string newtext = emojiconedittext.gettext().tostring(); if(newtext.trim().length()>0) { emojiconedittext.gettext().clear(); long _id = db.insertmessage(1, newtext, prefs.getstring("regmobile", "0"), rmob); // madapter.add(newtext); send(newtext,_id,getactivity().getapplicationcontext(),prefs.getstring("regmobile", "0")); cr.addrow(new string[]{string.valueof(_id),newtext,"1", sdf.format(calendar.getinstance().gettime()),"w"}); chatadapter.notifydatasetchanged(); lv.setselection(lv.getadapter().getcount() - 1); } } }); sethasoptionsmenu(true); return rootview; } @suppresslint("simpledateformat") public void refreshlist(long id,string msg) { simpledateformat sdf = new simpledateformat("dd mmm"); cr.addrow(new string[]{string.valueof(id),msg,"0", sdf.format(calendar.getinstance().gettime()),"w"}); chatadapter.notifydatasetchanged(); lv.setselection(lv.getadapter().getcount() - 1); } private void send(final string txt, final long _id, final context context, final string mynumber) { new asynctask<void, void, string>() { @override protected string doinbackground(void... params) { string msg = ""; try { serverutilities.send(txt, rmob,_id,context,mynumber); } catch (ioexception ex) { msg = "message not sent"; } return msg; } @override protected void onpostexecute(string msg) { if (!textutils.isempty(msg)) { //toast.maketext(getactivity(), msg, toast.length_long).show(); } } }.execute(null, null, null); }} broadcastreceiver follows:
public class gcmbroadcastreceiver extends wakefulbroadcastreceiver { private static final string tag = "gcmbroadcastreceiver"; public static final string constant_for_receiver = "msg_type"; private context ctx; dbhelper db; @override public void onreceive(context context, intent intent) { ctx = context; db = new dbhelper(ctx); powermanager mpowermanager = (powermanager) context.getsystemservice(context.power_service); wakelock mwakelock = mpowermanager.newwakelock(powermanager.partial_wake_lock, tag); mwakelock.acquire(); try { googlecloudmessaging gcm = googlecloudmessaging.getinstance(context); string messagetype = gcm.getmessagetype(intent); if (googlecloudmessaging.message_type_send_error.equals(messagetype)) { //sendnotification("send error", false); } else if (googlecloudmessaging.message_type_deleted.equals(messagetype)) { //sendnotification("deleted messages on server", false); } else { componentname comp = new componentname(context.getpackagename(),messageview_fragment.esendservice.class.getname()); startwakefulservice(context, (intent.setcomponent(comp))); setresultcode(activity.result_ok); } setresultcode(activity.result_ok); } { mwakelock.release(); } }} sendservice follows:
public class sendservice extends intentservice { dbhelper db; context ctx; public sendservice() { // todo auto-generated constructor stub super("name"); } public sendservice(string name) { super(name); // todo auto-generated constructor stub } @override protected void onhandleintent(intent intent) { db = new dbhelper(getapplicationcontext()); ctx = getapplicationcontext(); // todo auto-generated method stub string msg = intent.getstringextra(dbhelper.messages_column_message); string sendermob = intent.getstringextra(dbhelper.messages_column_sender_mobile); string receivermob = intent.getstringextra(dbhelper.messages_column_receiver_mobile); string chattype = intent.getstringextra("chattype"); log.e("rmob", receivermob); log.e("smob", sendermob); db.insertmessage(0, msg,receivermob ,sendermob,"open"); contact_master cm = db.getcontactdetails(sendermob); string sender_name = ""; if(cm !=null) { sender_name = cm.getname(); } else { sender_name = sendermob; } db.close(); }} currently, flow of receiving email follows:
gcm -> broadcardreceiver -> sendservice -> messageviewfragment
thanks in advance.
you have use intentservice update listview ui.
override onreceiveresult(int, bundle)
see answer so:
sample code solution:
@override protected void onreceiveresult (int resultcode, bundle resultdata) { cttobjects.clear(); cttobjectsdatasource datasource = new cttobjectsdatasource(context); datasource.open(); cttobjects.addall(datasource.getallobjects()); datasource.close(); arrayadapter.notifydatasetchanged(); } you have pass activity's context when initialize resultreceiver.
sample code:
public class mainactivity extends activity { .... .... .... public void showresults() { cttobjects.clear(); cttobjectsdatasource datasource = new cttobjectsdatasource(mainactivity.this); datasource.open(); cttobjects.addall(datasource.getallobjects()); datasource.close(); arrayadapter.notifydatasetchanged(); } .... .... .... class updateobjectresultreceiver extends resultreceiver { .... .... .... @override protected void onreceiveresult (int resultcode, bundle resultdata) { mainactivity.this.showresults(); } } } 
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