CODEWITHSUNDEEP
androidmultithreadinguser-interface
Madhu
Madhu

Reputation: 1800

Not able to update UI thread in android

I have try to update my TextView in Thread, but not able to do, below code shows my try

final Handler handler = new Handler();
Runnable runnable = new Runnable() {
    String add = null;

    public void run() {
        add = Util.getLocationCityName(String.valueOf(ltlng.latitude),String.valueOf(ltlng.longitude));

        handler.post(new Runnable() {
            public void run() {

                LogUtil.d("add" + add);//i can get the add value
                vImei.setText(add);
            }
        });
    }
};

new Thread(runnable).start();

i can able to get the add value which is inside handler but values are not update to my textview, dont know what mistake i have done

Upvotes: 0

Views: 104

Answers (4)

Sergey Shustikov
Sergey Shustikov

Reputation: 15821

Try to init Handler with looper

final Handler handler = new Handler(Looper.getMainLooper());

Also you can try :

private LooperThread mLooperThread;

class LooperThread extends Thread
{
    public Handler mHandler;

    public void run()
    {
        Looper.prepare();

        mHandler = new Handler()
        {
            public void handleMessage(Message msg)
            {
                vImei.setText(msg.getData().getString("ADD"));
            }
        };

        Looper.loop();
    }
}

create Looper :

    mLooperThread = new LooperThread();
    mLooperThread.start();

and when you need to update :

            Bundle bundle = new Bundle();
            bundle.putString("ADD", add);
            Message msg = Message.obtain();
            msg.setData(bundle);
            mLooperThread.mHandler.sendMessage(msg);

Upvotes: 2

Shoeb Siddique
Shoeb Siddique

Reputation: 2825

Please try this,

final Handler handler = new Handler();
                            Runnable runnable = new Runnable() {
                                String add = null;

                                public void run() {
                                    add = Util.getLocationCityName(
                                            String.valueOf(ltlng.latitude),
                                            String.valueOf(ltlng.longitude));

                                   runOnUiThread(new Runnable(){
        public void run() {
           LogUtil.d("add" + add);//i can get the add value
                                            vImei.setText(add);
        }
    });
                                }
                            };

                            new Thread(runnable).start();

Upvotes: 1

daemmie
daemmie

Reputation: 6460

An other solution which solves your problem is the usage of an AsyncTask

AsyncTask<Void, Void, String> asyncTask = new AsyncTask<Void, Void, String>(){

        @Override
        protected String doInBackground(Void... params) {
            // runs on its own thread
            return Util.getLocationCityName(
                    String.valueOf(ltlng.latitude),
                    String.valueOf(ltlng.longitude));
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            // runs on the UI Thread to Update your Views
            LogUtil.d("add" + result);
            vImei.setText(result);

        }
    };

    asyncTask.execute();

Upvotes: 1

Mayank Sugandhi
Mayank Sugandhi

Reputation: 397

//Global Initialize
 String add = "";// not null

 final Handler handler = new Handler();
                                Runnable runnable = new Runnable() {


                                    public void run() {
                                        add = Util.getLocationCityName(
                                                String.valueOf(ltlng.latitude),
                                                String.valueOf(ltlng.longitude));

                                        handler.post(new Runnable() {
                                            public void run() {

                                                LogUtil.d("add" + add);//i can get the add value
                                                vImei.setText(add);
                                            }
                                        });
                                    }
                                };

                                new Thread(runnable).start();

I hope it helps you.. :)

Upvotes: 1

Related Questions