Question

I am handling a thread in my application, I am facing a problem with Thread wait function. I created and show my UI using runOnUIThread() , my main thraed was waiting for my UI thread to finish ,after thraed finishes i have do some process in Main thread , here the problem is that Main Process is always in waiting state even my thread finishes it;s job I am using wait and notify() function for this

      public String LSVerification() {

        String t = null;

            t="Sample string";
            synchronized(this)

            {
            AndroidHTMLActivity.this.runOnUiThread(ShowDialog) ;//here i call my thread

            try {
               this.wait();//here i waiting for my thread to finish it's job

            //here i do some process after my thread finish it's job
              //the problem is here main process always in wait state


                } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            }
          return t;        
        }

        private Runnable ShowDialog = new Runnable() {
            public void run() {
                String t = null;
        synchronized(ShowDialog)

            {
            Recognition recg=new Recognition(Activity.this);

                recg.show();


            this.notify();
            }

            }
        };

Answer 1

try to use Hanlders to update UI after performing a job in background…

Link to Handlers See Code below..

private void performOperationInBackgroundThread() {
        Thread Servicethread = new Thread(
                    new Runnable() {
                        public void run() {
                            try {
                                PerformThreadOperation();
                                DataLoaded = true;
                            } catch (Exception e) {
                                ExceptionOccured = true;
                                e.printStackTrace();
                                System.out.println(e.getMessage());
                            }
                            handler.sendMessage(handler.obtainMessage());
                        }
                    }
                    );
            Servicethread.start();
        }


 static class MyHandler extends Handler{
                MyActiviy parentActivity;
                @Override
                public void handleMessage(Message msg){
                    // Update your UI here

                    }
                }

                MyHandler(MyActiviy activity){
                    parentActivity = activity;
                }
            }

MyHandler handler = new MyHandler(this);