android - How can I trigger my notification from a method? -

i trying trigger notification bottom. followed example code http://www.compiletimeerror.com/2013/10/status-bar-notification-example-in.html#.vwtos1xviko

i can trigger notification when call method homeactivity main activity app. when try call 1 of methods within app, nothing happens. (eg)

homeactivity homeactivity = new homeactivity(); homeactivity.notify("title: ...", "msg: ... "); 

here logs event. trigger alert after 5 button presses

05-31 18:33:41.533  10118-10118/com.myapp.md e/>>>>>>﹕ multiclickevent clickcount = 5 05-31 18:33:41.543  10118-10118/com.myapp.md e/>>>>>>>﹕ in onactivation of hwreceiver 05-31 18:33:41.603  10118-10118/com.myapp.md v/vibrator﹕ called vibrate(long) api - puid: 10588, packagename: com.myapp.md 05-31 18:33:41.603  10118-10118/com.myapp.md v/vibrator﹕ vibrate - puid: 10588, packagename: com.myapp.md, ms: 3000, mag: -1 05-31 18:33:41.643  10118-10118/com.myapp.md d/abslistview﹕ onvisibilitychanged() called, visibility : 4 05-31 18:33:41.643  10118-10118/com.myapp.md d/abslistview﹕ unregisterirlistener() called 05-31 18:33:41.643  10118-10118/com.myapp.md d/abslistview﹕ onvisibilitychanged() called, visibility : 4 05-31 18:33:41.643  10118-10118/com.myapp.md d/abslistview﹕ unregisterirlistener() called 05-31 18:33:41.643  10118-11068/com.myapp.md e/>>>>>>﹕ in currentlocationprovider constructor - trying retrieve location getlastknownlocation() 05-31 18:33:41.833  10118-11068/com.myapp.md i/com.myapp.md.alert.smsadapter﹕ sms sent: need immediate help! - i'm here https://maps.google.com/maps?q=40.7348922,-73.977548 via network 05-31 18:33:44.883  10118-10118/com.myapp.md e/>>>>>>>﹕ in onreceive of hwreceiver 05-31 18:33:44.883  10118-10118/com.myapp.md e/>>>>>>>﹕ in onreceive of hwreceiver context com.myapp.md.trigger.hardwaretriggerservice@429b89b0 05-31 18:33:44.883  10118-10118/com.myapp.md e/>>>>>>>﹕ in onreceive of hwreceiver intent intent { act=android.intent.action.screen_on flg=0x50000010 } 

i tried put notification in smsadapter

public class smsadapter {     private static final string log_tag = smsadapter.class.getname();      public void sendsms(context context, string phonenumber, string message) { //        log.e("20140411", "sending fake sms -> " + message);         if(!applicationsettings.isfirstmsgsent(context)){             applicationsettings.setfirstmsgsent(context, true);         }         smsmanager smsmanager = getsmsmanager();         try {             smsmanager.sendtextmessage(phonenumber, null, message, null, null);             log.i(log_tag, "sms sent: " + message);             homeactivity homeactivity = new homeactivity();             homeactivity.notify("title: text sos",                     "msg: alerting emergency contacts ");         } catch (exception exception) {             log.e(log_tag, "sending sms failed " + exception.getmessage());         }     }      smsmanager getsmsmanager() {         return smsmanager.getdefault();     } } 

when message

05-31 18:39:33.163  18640-19982/com.textsosalert.md e/>>>>>>﹕ in currentlocationprovider constructor - trying retrieve location getlastknownlocation() 05-31 18:39:33.383  18640-19982/com.textsosalert.md i/com.textsosalert.md.alert.smsadapter﹕ sms sent: need immediate help! - i'm here https://maps.google.com/maps?q=40.7348689,-73.9775756 via network 05-31 18:39:33.383  18640-19982/com.textsosalert.md e/com.textsosalert.md.alert.smsadapter﹕ sending sms failed can't create handler inside thread has not called looper.prepare() 

here notify method defined:

@suppresswarnings("deprecation") public void notify(string notificationtitle, string notificationmessage) {     notificationmanager notificationmanager = (notificationmanager) getsystemservice(notification_service);     @suppresswarnings("deprecation")     notification notification = new notification(r.drawable.icon_sos,             "new message", system.currenttimemillis());      intent notificationintent = new intent(this, homeactivity.class);     pendingintent pendingintent = pendingintent.getactivity(this, 0,             notificationintent, 0);      notification.setlatesteventinfo(homeactivity.this, notificationtitle,             notificationmessage, pendingintent);     notificationmanager.notify(9999, notification); } 

the problem you're calling new homeactivity(), should never do. activities in android started using startactivity() or startactivityforresult(), , should never created explicitly new.

when call new homeactivity(), none of activity lifecycle callbacks called, activity not have valid context.

so, won't work:

homeactivity homeactivity = new homeactivity(); homeactivity.notify("title: ...", "msg: ... "); 

if want have method can re-use in different places in code, put in separate class, , have method take context parameter.

import android.app.notification; import android.app.notificationmanager; import android.app.pendingintent; import android.content.context; import android.content.intent;  public class mynotification {      @suppresswarnings("deprecation")     public static void notify(context context, string notificationtitle, string notificationmessage) {         notificationmanager notificationmanager = (notificationmanager) context.getsystemservice(context.notification_service);         @suppresswarnings("deprecation")         notification notification = new notification(r.drawable.icon_sos,                 "new message", system.currenttimemillis());          intent notificationintent = new intent(context, homeactivity.class);         pendingintent pendingintent = pendingintent.getactivity(context, 0,                 notificationintent, 0);          notification.setlatesteventinfo(context, notificationtitle,                 notificationmessage, pendingintent);         notificationmanager.notify(9999, notification);     } } 

then in smsadapter, have:

    try {         smsmanager.sendtextmessage(phonenumber, null, message, null, null);         log.i(log_tag, "sms sent: " + message);         /* don't this:         homeactivity homeactivity = new homeactivity();         homeactivity.notify("title: text sos",                 "msg: alerting emergency contacts ");         */          //do instead:         mynotification.notify(context, "title: text sos",                 "msg: alerting emergency contacts ");      } catch (exception exception) {         log.e(log_tag, "sending sms failed " + exception.getmessage());     } 

also note can call homeactivity using this context:

 mynotification.notify(this, "title: text sos",                 "msg: alerting emergency contacts ");