android - Avoid locking the screen while ProgressDialog is displaying -

i want show progressbar while instructions execute in background, don't want lock screen. code locking screen:

private class convertdatainbackground extends asynctask<params, void, boolean> {          private myprogressdialog mprogressdialog;          @override         public void onpreexecute() {             if(mprogressdialog == null)                 mprogressdialog = myprogressdialog.show(mactivity, null, null);         }          @override         protected boolean doinbackground(params...params) {             boolean conversionresult = executeconversion(params[0].item1, params[0].item2, params[0].item3);             return conversionresult;         }          @override         protected void onpostexecute(boolean result) {             try {                 if(mprogressdialog.isshowing())                      mprogressdialog.dismiss();                 if(result) {                     toast toast = toast.maketext(mactivity, r.string.conversion_result, toast.length_short);                     toast.setgravity(gravity.center, 0, 0);                     toast.show();                 }             } catch (exception e) {                 e.printstacktrace();             }         } } 

execution of instruction in background may take while, , want user able work interface. know anyway can work interface, while progressdialog displaying @ top?

dialogs in android modal. can try creating dialog adding flag_not_touch_modal window parameters - i'm not sure if work. idea behind this:

progressdialog dialog = new progressdialog(this); dialog.setmessage(...); dialog.settitle(...); dialog.getwindow().addflags(windowmanager.layoutparams.flag_not_touch_modal); 

note @ same time may easier add progressbar activity's layout , show when needed instead of creating dialog - is, in fact, google documentation recommends. android developer's guide on dialogs has say:

avoid progressdialog

android includes dialog class called progressdialog shows dialog progress bar. however, if need indicate loading or indeterminate progress, should instead follow design guidelines progress & activity , use progressbar in layout.