Best way handle result from thread on UI

Question

I want to save data to DB in new Thread and after that show toast on the UI.

Method for saving:

public void addToBasket(String text) {

        new Thread(() -> {

                //emulate save
                try {
                    Thread.sleep(5000L);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
              //after that I need say ti UI thread - show Toast!
        }).start();
    }

I call this method:

BasketService.me().addToBasket(result.getContents());

I do now want use AsyncTask for this. Please tell me the best way to implement such tasks

Use runOnUiThread() batter understand : https://stackoverflow.com/questions/11140285/how-to-use-runonuithread — ND1010_, Dec 04 '17 at 10:03
Possible duplicate of [Most concise way to run a simple background task?](https://stackoverflow.com/questions/29950047/most-concise-way-to-run-a-simple-background-task) — AskNilesh, Dec 04 '17 at 10:10

ND1010_ · Answer 1 · 2017-12-04T10:14:12.520

-1

batter to use:

runOnUiThread(new Runnable() {
                public void run() {
                //Do what ever you want do man 
            }
        });

runOnUiThread() method to manipulate your UserInterface from background threads.

edited Dec 04 '17 at 10:14

answered Dec 04 '17 at 10:04

ND1010_

3,743
24
41

you can not use Toast and other UI operation in doInBackgroud() because may be you will be a create network operation on that – ND1010_ Dec 04 '17 at 10:08
Yup it is not a best way but should be relevent for you – ND1010_ Dec 04 '17 at 10:09

score -1 · Answer 2 · answered Dec 04 '17 at 10:16

In case of callback from a nonUi thread to Ui thread you can use runOnUiThread()(As specified above) or Handler. Below is a example of using handler.

 protected static final Handler mainThreadHandler = new Handler(Looper.getMainLooper());

protected void onSuccessInMainThread(final R result, final Bundle bundle) {
    mainThreadHandler.post(new Runnable() {
        @Override
        public void run() {
            callback.onSuccess(result, bundle);
        }
    });
}

protected void onErrorInMainThread(final Exception error) {
    mainThreadHandler.post(new Runnable() {
        @Override
        public void run() {
            callback.onError(error);
        }
    });
}

Best way handle result from thread on UI

2 Answers2