java - android unparseble date Exception? -
i making application in using date functionality,but looking after several existing posts, still not able simpledateformat parser working.
here code:
public class gpsdemo extends activity { public static string tag = "abhi's log"; public static string imeii = "imei"; public static string start_time = "starttime"; public static string working_status = "workingstatus"; public static string address = "address"; public static int level = 0; button stop, hide; sharedpreferences pref; editor edit; date d1 = null; date d2 = null; string startingtime; string currenttime; context ctx = this; textview txt_start_time, txt_total_time, txt_total_distance, txt_address; @suppresslint("newapi") @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.demoooo); pref = preferencemanager.getdefaultsharedpreferences(getapplicationcontext()); edit = pref.edit(); connectivitymanager connectivitymanager = (connectivitymanager)getsystemservice(getbasecontext().connectivity_service); this.registerreceiver(this.batteryinforeceiver, new intentfilter(intent.action_battery_changed)); txt_start_time = (textview) findviewbyid(r.id.txt_start_time); txt_total_time = (textview) findviewbyid(r.id.txt_total_time); txt_total_distance = (textview) findviewbyid(r.id.txt_total_distance); txt_address = (textview) findviewbyid(r.id.txt_address); try { telephonymanager mtelephonymgr = (telephonymanager) getsystemservice(context.telephony_service); editor edit = preferencemanager .getdefaultsharedpreferences( getapplicationcontext()).edit(); edit.putstring(imeii, mtelephonymgr.getdeviceid()); edit.commit(); log.i(tag, "imei stored sucessfully : " + preferencemanager.getdefaultsharedpreferences(getapplicationcontext()).getstring(imeii, "")); } catch (exception e) { log.d(tag, "exception while storin data : " + e); } // turngpson(this); // turngpson(); if(!isinterneton()) { try { method method = connectivitymanager.getclass().getmethod("setmobiledataenabled", boolean.class); method.invoke(connectivitymanager, true); } catch (nosuchmethodexception e) { e.printstacktrace(); } catch (exception e) { e.printstacktrace(); } } stop = (button) findviewbyid(r.id.btn_stop); hide = (button) findviewbyid(r.id.btn_hide); try { simpledateformat sdf = new simpledateformat("dd/mm/yyyy hh:mm:ss"); if(pref.getstring(working_status, "").equals("no")) { intent intent = new intent(gpsdemo.this, networktrackerservice.class); startservice(intent); edit.putstring(working_status, "yes"); edit.putstring(start_time, sdf.format(new date())); edit.commit(); txt_start_time.settext(sdf.format(new date())); } else if(pref.getstring(working_status, "").equals("yes")) { txt_start_time.settext(pref.getstring(start_time, "")); } updateinof(); startinfoupdater(); log.i("abhi's log", "values stored :: " +pref.getstring(working_status, "") +" " + pref.getstring(start_time, "") ); } catch (exception e) { // todo auto-generated catch block e.printstacktrace(); } stop.setonclicklistener(new onclicklistener() { @override public void onclick(view v) { // todo auto-generated method stub intent intent = new intent(gpsdemo.this, networktrackerservice.class); edit.putstring(working_status, "no"); edit.putstring(start_time, ""); edit.putstring(address, ""); edit.commit(); stopservice(intent); system.exit(0); } }); hide.setonclicklistener(new onclicklistener() { @override public void onclick(view v) { // todo auto-generated method stub gpsdemo.this.finish(); } }); } @suppresslint("newapi") @suppresswarnings("deprecation") public void turngpson(context context) { intent intent = new intent("android.location.gps_enabled_change"); intent.putextra("enabled", true); context.sendbroadcast(intent); string provider = settings.secure.getstring(context.getcontentresolver(), settings.secure.location_providers_allowed); if (! provider.contains("gps")) { //if gps disabled final intent poke = new intent(); poke.setclassname("com.tracking.gps", "com.android.settings.widget.settingsappwidgetprovider"); poke.addcategory(intent.category_alternative); poke.setdata(uri.parse("3")); context.sendbroadcast(poke); } } public void turngpson() { intent intent = new intent("android.location.gps_enabled_change"); intent.putextra("enabled", true); this.ctx.sendbroadcast(intent); string provider = settings.secure.getstring(ctx.getcontentresolver(), settings.secure.location_providers_allowed); if(!provider.contains("gps")) { //if gps disabled final intent poke = new intent(); poke.setclassname("com.android.settings", "com.android.settings.widget.settingsappwidgetprovider"); poke.addcategory(intent.category_alternative); poke.setdata(uri.parse("3")); this.ctx.sendbroadcast(poke); } } @suppresslint("newapi") @suppresswarnings("deprecation") public static void turngpsoff(context context) { string provider = settings.secure.getstring(context.getcontentresolver(), settings.secure.location_providers_allowed); if (provider.contains("gps")) { //if gps enabled final intent poke = new intent(); poke.setclassname("com.android.settings", "com.android.settings.widget.settingsappwidgetprovider"); poke.addcategory(intent.category_alternative); poke.setdata(uri.parse("3")); context.sendbroadcast(poke); } } private void startinfoupdater() { // todo auto-generated method stub final handler handler = new handler(); handler.postdelayed(new runnable() { @override public void run() { //do after 100ms log.v("abhi's tag", "inside schedulat ... !!!"); updateinof(); startinfoupdater(); } }, 60000); } protected void updateinof() { // todo auto-generated method stub long diffseconds, diffminutes = 0, diffhours = 0, diffdays = 0; simpledateformat sdf1 = new simpledateformat("dd/mm/yyyy hh:mm:ss"); currenttime = sdf1.format(new date()); try { d1 = sdf1.parse(pref.getstring(start_time, "")); d2 = sdf1.parse(currenttime); long diff = d2.gettime() - d1.gettime(); diffseconds = diff / (1000); diffminutes = diff / (60 * 1000); diffhours = diff / (60 * 60 * 1000); diffdays = diff / (24 * 60 * 60 * 1000); log.i("abhi's tag", "days : " + diffdays); log.i("abhi's tag", "hours : " + diffhours); log.i("abhi's tag", "minutes : " + diffminutes); log.i("abhi's tag", "seconds : " + diffseconds); } catch (parseexception e) { // todo auto-generated catch block e.printstacktrace(); } txt_start_time.settext(pref.getstring(start_time, "")); txt_total_time.settext(diffdays+" d, " + diffhours + " h, " + diffminutes + " m"); txt_address.settext(pref.getstring(address, "")); } private broadcastreceiver batteryinforeceiver = new broadcastreceiver() { @override public void onreceive(context context, intent intent) { level= intent.getintextra(batterymanager.extra_level,0); sharedpreferences pref = preferencemanager.getdefaultsharedpreferences(context); editor edit = pref.edit(); edit.putint("batterystatus", level); edit.commit(); } }; public final boolean isinterneton() { connectivitymanager connec = (connectivitymanager)getsystemservice(getbasecontext().connectivity_service); if ( connec.getnetworkinfo(0).getstate() == android.net.networkinfo.state.connected || connec.getnetworkinfo(0).getstate() == android.net.networkinfo.state.connecting || connec.getnetworkinfo(1).getstate() == android.net.networkinfo.state.connecting || connec.getnetworkinfo(1).getstate() == android.net.networkinfo.state.connected ) { return true; } else if ( connec.getnetworkinfo(0).getstate() == android.net.networkinfo.state.disconnected || connec.getnetworkinfo(1).getstate() == android.net.networkinfo.state.disconnected ) { return false; } return false; } @override public void onbackpressed() { // todo auto-generated method stub } } and getting error
java.text.parseexception: unparseable date:""
you have this
sdf1.parse(pref.getstring(start_time, "")); if default value returned empty string. natural java.text.parseexception: unparseable date:"". parsing empty string
public abstract string getstring (string key, string defvalue) added in api level 1 retrieve string value preferences. returns preference value if exists, or defvalue
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