java - Using Android ProgressDialog with AsyncTask and odd Activity Lifecycle -

i couldn't think of way form title make issue obvious, here goes:

i'm little on head diving asynctask first time. have app sends tweet. must kick out webview twitter authorization, comes onnewintent().

what i'm trying throw simple spinner progressdialog while it's connecting site/performing accesstoken work, , again while it's sending tweet. i've discovered need new thread progress bar. or rather, should doing "time-intensive work" in it's own separate thread make using progressdialog viable. question this: how can have progress spinner in foreground while authorization code works in background, , opens webview , comes back, , starts on @ onresume()?

i'm sure i'm not doing else in proper fashion. i'm new android, not java. i've put in create- , dismissdialog(int) calls should be, procedurally. as-is, otherwise works way should, dialogs not able show themselves.

i'm thinking should put entire authorize() , tweet() methods own asynctask. i'm not sure how go that, since authorize() (or more specifically, logintotwitter()) needs end saving data gets browser shared preferences after comes onnewintent().

thanks insights, == matt

public class integratetwitter extends activity {      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);     }      @override     protected void onresume() {         super.onresume();          mprefs = getsharedpreferences(prefs_name, mode_private);         mtwitter = new twitterfactory().getinstance();          mtwitter.setoauthconsumer(consumer_key, consumer_secret);          if(authorize()) {             tweet();             returntomm();         }     }      private boolean authorize() {         log.i(log_tag, "authorizing...");            showdialog(pd_authorizing);         boolean result = false;          if(responseexistsandvalid()) {             saveresponsetoaccesstoken();         }          if(isauthorized()) {             log.i(log_tag, "prefs have accesstoken, grabbing it...");             if(getaccesstokenfromprefs()) {                 toast.maketext(integratetwitter.this, "authorized.", toast.length_short).show();                 result = true;             }         }         else {             log.i(log_tag, "prefs don't have accesstoken.");              if(!responsestringexists()) {                 log.i(log_tag, "no response exists either, starting twitter login process...");                 toast.maketext(integratetwitter.this, "authorizing...", toast.length_short).show();                 // here kicks out browser authentication                 logintotwitter();             }             else {                 toast.maketext(integratetwitter.this, "authorization failed.", toast.length_short).show();                 log.i(log_tag, "response exists, must have failed once already, skipping twitter login process.");                 returntomm();             }         }          deleteresponsefromprefs();          dismissdialog(pd_authorizing);         return result;     }      private void tweet() {         showdialog(pd_tweeting);          try {             date testdate = new date();             string testdatestring  = dateformat.format("yyyy-mm-dd @ hh:mm:ss", testdate.gettime()).tostring();             mtwitter.updatestatus(testdatestring + " test tweet");             toast.maketext(this, "tweet successful!", toast.length_short).show();         }         catch (twitterexception e) {             toast.maketext(this, "tweet error.", toast.length_short).show();             log.i(log_tag, e.getmessage());             log.i(log_tag, arrays.tostring(e.getstacktrace()));         }          dismissdialog(pd_tweeting);     }      // bunch of support methods     // ...   } 

try this.....

i think know if not using asynctask, can use thread along handler, post work done on non-ui thread ui thread.

asynctask provided android sync ui , non-ui work seamlessly.

i got example searching on google, but changed way wanted be.

here count till 50... , until keep displaying progressdialog. please see log while program executing see count increasing till 50.

public class asynctaskexampleactivity extends activity  {         protected textview _percentfield;         protected button _cancelbutton;         protected inittask _inittask;         progressdialog pd;      @override     public void oncreate( bundle savedinstancestate )      {         super.oncreate(savedinstancestate);          setcontentview( r.layout.main );          _percentfield = ( textview ) findviewbyid( r.id.percent_field );         _cancelbutton = ( button ) findviewbyid( r.id.cancel_button );         _cancelbutton.setonclicklistener( new cancelbuttonlistener() );          _inittask = new inittask();            pd = progressdialog.show(asynctaskexampleactivity.this, "loading", "please wait");           _inittask.execute( );     }      protected class cancelbuttonlistener implements view.onclicklistener      {                 public void onclick(view v) {                         _inittask.cancel(true);                 }     }      /**      * sub-class of asynctask      */     protected class inittask extends asynctask<context, integer, string>     {         // -- run intensive processes here         // -- notice datatype of first param in class definition matches param passed method          // -- , datatype of last param in class definition matches return type of method                 @override                 protected string doinbackground( context... params )                  {                         //-- on every iteration                         //-- runs while loop causes thread sleep 50 milliseconds                          //-- publishes progress - calls onprogressupdate handler defined below                         //-- , increments counter variable 1                         int = 0;                         while( <= 50 )                          {                                 try{                                         thread.sleep( 50 );                                         publishprogress( );                                         i++;                                 } catch( exception e ){                                         log.i("makemachine", e.getmessage() );                                 }                         }                         pd.dismiss();                          return "complete!";                 }                  // -- gets called before thread begins                 @override                 protected void onpreexecute()                  {                         log.i( "makemachine", "onpreexecute()" );                          super.onpreexecute();                  }                  // -- called publish progress                  // -- notice datatype of second param gets passed method                 @override                 protected void onprogressupdate(integer... values)                  {                         super.onprogressupdate(values);                         log.i( "makemachine", "onprogressupdate(): " +  string.valueof( values[0] ) );                         _percentfield.settext( ( values[0] * 2 ) + "%");                         _percentfield.settextsize( values[0] );                 }                  // -- called if cancel button pressed                 @override                 protected void oncancelled()                 {                         super.oncancelled();                         log.i( "makemachine", "oncancelled()" );                         _percentfield.settext( "cancelled!" );                         _percentfield.settextcolor( 0xffff0000 );                 }                  // -- called doinbackground method completes                 // -- notice third param gets passed method                 @override                 protected void onpostexecute( string result )                  {                          super.onpostexecute(result);                         log.i( "makemachine", "onpostexecute(): " + result );                         _percentfield.settext( result );                         _percentfield.settextcolor( 0xff69adea );                         _cancelbutton.setvisibility( view.invisible );                 }     }     }