Timer Thread To Refresh The Fragment On Android

I have implemented a thread in android which refresh the fragment (some text list ) for every 1 second . its giving the runtime error while calling the fragment method at thread ,

Solution 1:

I think you have to do the refreshing in

yourActivity.runOnUiThread(new Runnable() {
publicvoidrun()   { /* here */ });

Or via a Handler, or via a post() or in an AsyncTask's onProgress()

Solution 2:

You are having errors because you are doing UI operations in a not UI thread. If you change the code into something like this, you will not have that error:

publicclassRunThreadExtendedextendsActivityimplementsRunnable
{
   publicvoidrun() {

   while(true)
   {  try {
       Thread.sleep(1000);
       AndroidListFragmentActivity.strup++;
       RunThreadExtended.this.runOnUiThread(newRunnable() { //Use the runOnUIThread method to do your UI hanlding in the UI Threadpublicvoidrun()   {
               MyListFragment1fragmentB= (MyListFragment1)getFragmentManager().findFragmentById(R.id.fragment1);
               fragmentB.updatefrag();
           }
       });
   } catch (InterruptedException e) {
        e.printStackTrace();
   }
   }}}

Solution 3:

You can't update the UI on any thread except for the UI thread. If you want to update the thread you can use a handler that you send a message to every second (handlers handle all messages on the main UI thread).

See

Update UI from Thread

Solution 4:

You could also broadcast an Intent (context.sendBroadcast(intent)) in a thread and receive it in your Activity: Broadcast Receiver

Solution 5:

maybe you can do all the work inside a fragment. here are the steps.

1. define the Handler and Runnable in the fragment.
2. create the Handler and Runnable in the onCreate() and onAttach()
3. post the Runnable job in the Handler in onStart().
4. remove the Runnable job out of the Handler in onStop().

below are the code snippet.

publicclassJobDetailFragment {

privateHandler m_Handler;
privateRunnable m_Runnable;

@OverridepublicvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    m_Runnable = newRunnable() {

        @Overridepublicvoidrun() {

            updateJobStatus();
        }
    };
}

@OverridepublicvoidonAttach(Activity activity) {
    super.onAttach(activity);

    m_Handler = newHandler();
}

@OverridepublicvoidonStart() {
    super.onStart();

    if (m_Handler != null) {
        m_Handler.postDelayed(m_Runnable, PrinterOnUIConstants.PRINT_JOB_AUTO_UPDATE_INTERVAL);
    };
}

@OverridepublicvoidonStop() {
    super.onStop();

    // cancel the potential enqueued callback.if (m_Handler != null) {
        m_Handler.removeCallbacks(m_Runnable);
    }
}