How to show AlertDialog When Application in Foreground Android? -


i have program responsible show alertdialog when in foreground after several seconds:

    activitymanager = (activitymanager) getsystemserv();     if (am != null) {         list< activitymanager.runningtaskinfo > taskinfo = am.getrunningtasks(1);         if (taskinfo != null && !taskinfo.isempty()) {             if (taskinfo.get(0) != null && taskinfo.get(0).topactivity != null) {                 if (!my_class_name.equalsignorecase(taskinfo.get(0).topactivity.getclassname())) {                      new alertdialog.builder(this).setmessage("aaaaaaaaaaaaaaaaaaaaaaaaaaaa?")                     .settitle("message").setpositivebutton("yes", new dialoginterface.onclicklistener() {                         public void onclick(dialoginterface dialog, int which) {                                                          }                       })                       .setnegativebutton("no", new dialoginterface.onclicklistener() {                         public void onclick(dialoginterface dialog, int which){                          }                     }).show();                                       }             }         }                            }

but alertdialog didn't show when app go foreground! pls me! thanks!

you can't show dialog service. instead use activity themed dialog, set theme activity (in manifest) this: 

android:theme="@android:style/theme.dialog"

also, shouldn't use timertask, use handler instead, this: http://developer.android.com/resources/articles/timed-ui-updates.html


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