CODEWITHSUNDEEP
androidandroid-logcat
raju
raju

Reputation: 785

Please can anyone explan this exception in LogCat

06-28 12:07:10.881: E/(930): {total=21 secs, date2=28-06-2012, time2=9:43:09 AM, time1=9:42:48 AM, date1=28-06-2012}
06-28 12:07:11.131: E/testing(930): exception:android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
06-28 12:07:11.160: E/(930): {total=24 secs, date2=28-06-2012, time2=10:45:02 AM, time1=10:44:38 AM, date1=28-06-2012}
06-28 12:07:11.601: E/testing(930): exception:java.lang.IllegalArgumentException: The observer is null.

Upvotes: 1

Views: 129

Answers (4)

K_Anas
K_Anas

Reputation: 31466

You can use threads but all the views, and all the views related APIs, must be invoked from the main thread (also called UI thread.) To do this from a background thread, you need to use a Handler. A Handler is an object that will post messages back to the UI thread for you.

Upvotes: 0

Aqif Hamid
Aqif Hamid

Reputation: 3521

Look at code that is written in a seprate thread and is trying to update your application UI.

You need to put that code in run method of runOnUiThread.

runOnUiThread(new Runnable() {
     public void run() {
           // COde to update UI.
    }
});

Upvotes: 1

cklab
cklab

Reputation: 3771

You are attempting to modify UI components on a thread that is not the UI thread. Take a look at runOnUiThread for updating UI components from non-UI threads.

Upvotes: 0

Dheeresh Singh
Dheeresh Singh

Reputation: 15701

  • .ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views

looks you are trying to update the UI element from non UI thread.

should use Handler or runOuUIThread function of activities or Asynctask as per your need

Upvotes: 2

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