i want implement search in listview made custom listadatper, parsing data json , saving internal storage, here code
package life.quran.com.quranlife; public class mainactivity extends actionbaractivity { list<surah> surahlist; listview lv; edittext searchtxt; arraylist<string> surahnames; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); actionbar ab = getsupportactionbar(); ab.hide(); searchtxt = (edittext) findviewbyid(r.id.txtsearch); surahlist = new arraylist<>(); lv = (listview) findviewbyid(r.id.listview); file f = getfilesdir();a string filepath = f.getabsolutepath(); file _file = new file(filepath + "/surah.json"); if (isonline()) { surahtask task = new surahtask(); task.execute("http://quran.life/surah.php"); } else { string offline_data = readfromfile(); surahlist = surahjsonparser.parsedata(offline_data); displaysurah(); } } @override public boolean oncreateoptionsmenu(menu menu) { // inflate menu; adds items action bar if present. getmenuinflater().inflate(r.menu.menu_main, menu); return true; } protected void displaysurah() { final surahadapter adapter = new surahadapter(mainactivity.this,r.layout.item_template,surahlist); lv.setadapter(adapter); lv.setonitemclicklistener(new adapterview.onitemclicklistener() { @override public void onitemclick(adapterview<?> parent, view view, int position, long id) { surah surah = adapter.getitem(position); string surahno = surah.getsurah_no().tostring(); string suranname = surah.getsurah_name().tostring(); intent intent = new intent(mainactivity.this, surahdetailsactivity.class); intent.putextra("_sno", surahno); intent.putextra("_sname", suranname); startactivity(intent); } }); searchtxt.addtextchangedlistener(new textwatcher() { @override public void beforetextchanged(charsequence s, int start, int count, int after) { } @override public void ontextchanged(charsequence s, int start, int before, int count) { /* surah surahitems = new surah(); list<surah> newlist = new arraylist<surah>(); arraylist<string> temp = new arraylist<string>(); int textlength = searchtxt.gettext().length(); newlist.clear(); for(int = 0; < surahnames.size(); i++) { if(textlength <= surahnames.get(i).length()) { if(searchtxt.gettext().tostring().equalsignorecase((string)surahnames.get(i).subsequence(0,textlength))) { newlist.add(surahnames.get(i)); } } } lv.setadapter(new surahadapter(mainactivity.this,r.layout.item_template,surahlist)); */ } @override public void aftertextchanged(editable s) { } }); } private boolean isonline() { connectivitymanager cm = (connectivitymanager) getsystemservice(context.connectivity_service); networkinfo netinfo = cm.getactivenetworkinfo(); if (netinfo != null && netinfo.isconnectedorconnecting()) { return true; } else { return false; } } private void writetofile(string data) { try { outputstreamwriter outputstreamwriter = new outputstreamwriter(openfileoutput("surah.json", context.mode_private)); outputstreamwriter.write(data); outputstreamwriter.close(); } catch (ioexception e) { log.e("exception", "file write failed: " + e.tostring()); } } private string readfromfile() { string ret = ""; try { inputstream inputstream = openfileinput("surah.json"); if (inputstream != null) { inputstreamreader inputstreamreader = new inputstreamreader(inputstream); bufferedreader bufferedreader = new bufferedreader(inputstreamreader); string receivestring = ""; stringbuilder stringbuilder = new stringbuilder(); while ((receivestring = bufferedreader.readline()) != null) { stringbuilder.append(receivestring); } inputstream.close(); ret = stringbuilder.tostring(); } } catch (filenotfoundexception e) { log.e("login activity", "file not found: " + e.tostring()); } catch (ioexception e) { log.e("login activity", "can not read file: " + e.tostring()); } return ret; } @override public boolean onoptionsitemselected(menuitem item) { // handle action bar item clicks here. action bar // automatically handle clicks on home/up button, long // specify parent activity in androidmanifest.xml. int id = item.getitemid(); //noinspection simplifiableifstatement if (id == r.id.action_settings) { return true; } return super.onoptionsitemselected(item); } private class surahtask extends asynctask<string, string, string> { progressdialog pd; @override protected void onpreexecute() { pd = new progressdialog(mainactivity.this); pd.setprogressstyle(progressdialog.style_spinner); pd.settitle("please wait..."); pd.setmessage("preparing list of surah.."); pd.setindeterminate(false); pd.setcancelable(false); pd.show(); } @override protected string doinbackground(string... params) { surahnames = new arraylist<>(); string content = httpmanager.getdata(params[0]); for(surah surah : surahlist) { surahnames.add("surah " +surah.getsurah_name()); } writetofile(content); return content ; } @override protected void onpostexecute(string s) { surahlist = surahjsonparser.parsedata(s); displaysurah(); pd.dismiss(); } } } edited
to implement search, need use textchanged event of edittext take search word input. can read following links learn action listeners:-
1)how apply textchange event on edittext
2)counting chars in edittext changed listener
after getting search keyword go through list , match objects keywords. store list item in separate list matches search keyword. after search finished set new adapter using newly created list.
best of luck!
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