Views can't be updated after fragment changed

Question

I have 2 fragments and one of them I'm trying to update some views after some data update. My views are updated fine when I remain in fragment when I have these views. After changed to another fragment my thread continues to work fine. But after I return for the first fragment my views can't be updated.

myThread = new Thread(){
        @Override
        public synchronized void run(){
            while( true ){
                try {
                    sleep( 2000 );
                    myActivity.runOnUiThread( new Runnable(){
                        @Override
                        public void run(){
                            updateViews();
                        }
                    });

                } catch ( InterruptedException e ) {
                    e.printStackTrace();
                }
            }
        }
    };

This is the update function:

private void updateViews(){
    textView.setText( _chronometerService.getTime() );
}

Notice my thread continues to update data, my issue is why views can't be updated.

Handler for example: http://stackoverflow.com/questions/6964011/handler-vs-asynctask-vs-thread — Stefan, Feb 09 '17 at 15:24
@Stefan AsyncTask is for short operations. I don't think handlers fits in this case, because if I change to another fragment I cannot continuously update data. — learner, Feb 09 '17 at 16:01

score 0 · Answer 1 · answered Feb 09 '17 at 16:14

0

Maybe you're creating a new fragment while switching?

answered Feb 09 '17 at 16:14

Duke79

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As I said before. – learner Feb 09 '17 at 16:27
I don't understand. Is it somehow unavoidable to create a new fragment object in your case? Is it not possible to keep the same object and only hide it using transactions? – Duke79 Feb 09 '17 at 16:30
I use FragmentTransaction.replace.commit for each fragment. They are changed when I press a button – learner Feb 09 '17 at 16:42
Okay. Not what I thought then. – Duke79 Feb 09 '17 at 16:46

Views can't be updated after fragment changed

1 Answers1