android - Send SMS after onClick positiveButton is pressed -

a dialog box opens after "panic" button pressed. dialog box confirming presser indeed panicking.

after "yes" button pressed, want send sms number (just using mine atm)

this have far:

in main menu:

public panic panic;  public void panicsos(view view) {     alertdialog.builder builder = new alertdialog.builder(this);     builder.settitle("sos beacon");     builder.setmessage("are sure?");      builder.setpositivebutton("on", new dialoginterface.onclicklistener() {          public void onclick(dialoginterface dialog, int which) {                                                      //sets panic mode                                         panic.sendrequest(null);                                         dialog.dismiss(); } } );      builder.setnegativebutton("off", new dialoginterface.onclicklistener() {          @override         public void onclick(dialoginterface dialog, int which) {                                          //sets chill mode                                          dialog.dismiss(); } } );      alertdialog alert = builder.create();     alert.show(); } 

then in panic class

public class panic extends activity {  string phonenumber = "04********"; // todo: should not static string message = "check-in request";  /**  * factory method creating launch intent.  * @param context  * @param payload string input  * @return  */ public static intent makeintent(context context, string payload) {     return new intent(context, panic.class); }  // sends checkin request client instantly via sms public void sendrequest(view view) {             smsmanager manager = smsmanager.getdefault();     manager.sendtextmessage(phonenumber, null, message, null, null);         } 

getting null pointer exception , few other errors. tips?

commencing gross swath of logcat grossness

09-23 02:22:22.675: d/androidruntime(4518): shutting down vm 09-23 02:22:22.675: w/dalvikvm(4518): threadid=1: thread exiting uncaught exception (group=0x41800d88)

09-23 02:22:22.675: e/androidruntime(4518): fatal exception: main

09-23 02:22:22.675: e/androidruntime(4518): process: com.illusivemen.smartwatchclient, pid: 4518

09-23 02:22:22.675: e/androidruntime(4518): java.lang.nullpointerexception

09-23 02:22:22.675: e/androidruntime(4518): @ com.illusivemen.smartwatchclient.mainmenu$2.onclick(mainmenu.java:96)

09-23 02:22:22.675: e/androidruntime(4518): @ com.android.internal.app.alertcontroller$buttonhandler.handlemessage(alertcontroller.java:171)

09-23 02:22:22.675: e/androidruntime(4518): @ android.os.handler.dispatchmessage(handler.java:102)

09-23 02:22:22.675: e/androidruntime(4518): @ android.os.looper.loop(looper.java:212)

09-23 02:22:22.675: e/androidruntime(4518): @ android.app.activitythread.main(activitythread.java:5135)

09-23 02:22:22.675: e/androidruntime(4518): @ java.lang.reflect.method.invokenative(native method)

09-23 02:22:22.675: e/androidruntime(4518): @ java.lang.reflect.method.invoke(method.java:515)

09-23 02:22:22.675: e/androidruntime(4518): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:877)

09-23 02:22:22.675: e/androidruntime(4518): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:693)

09-23 02:22:22.675: e/androidruntime(4518): @ dalvik.system.nativestart.main(native method)

09-23 02:22:24.455: i/process(4518): sending signal. pid: 4518 sig: 9

09-23 02:39:04.480: d/androidruntime(5298): shutting down vm

09-23 02:39:04.480: w/dalvikvm(5298): threadid=1: thread exiting uncaught exception (group=0x41800d88)

09-23 02:39:04.490: e/androidruntime(5298): fatal exception: main

09-23 02:39:04.490: e/androidruntime(5298): process: com.illusivemen.smartwatchclient, pid: 5298

09-23 02:39:04.490: e/androidruntime(5298): java.lang.nullpointerexception

09-23 02:39:04.490: e/androidruntime(5298): @ com.illusivemen.smartwatchclient.mainmenu$2.onclick(mainmenu.java:96)

09-23 02:39:04.490: e/androidruntime(5298): @ com.android.internal.app.alertcontroller$buttonhandler.handlemessage(alertcontroller.java:171)

09-23 02:39:04.490: e/androidruntime(5298): @ android.os.handler.dispatchmessage(handler.java:102)

09-23 02:39:04.490: e/androidruntime(5298): @ android.os.looper.loop(looper.java:212)

09-23 02:39:04.490: e/androidruntime(5298): @ android.app.activitythread.main(activitythread.java:5135)

09-23 02:39:04.490: e/androidruntime(5298): @ java.lang.reflect.method.invokenative(native method)

09-23 02:39:04.490: e/androidruntime(5298): @ java.lang.reflect.method.invoke(method.java:515)

09-23 02:39:04.490: e/androidruntime(5298): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:877)

09-23 02:39:04.490: e/androidruntime(5298): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:693)

09-23 02:39:04.490: e/androidruntime(5298): @ dalvik.system.nativestart.main(native method)

09-23 02:39:05.980: i/process(5298): sending signal. pid: 5298 sig: 9

if panic normal java class no need extend activity in it. if panic activity instead of calling method creating object of panic use utility class , use in both activity's as:

public class utilityclass {  string phonenumber = "04********"; // todo: should not static string message = "check-in request";  public static intent makeintent(context context, string payload) {     return new intent(context, panic.class); }  // sends checkin request client instantly via sms public void sendrequest() {             smsmanager manager = smsmanager.getdefault();     manager.sendtextmessage(phonenumber, null, message, null, null);         } 

now call sendrequest alertdialog , activity as:

new utilityclass().sendrequest();