java - Should findviewbyid be called in UI thread? -


the question is: should call activity.findviewbyid in ui thread only?

the reason i'm asking call arbitrary thread , works flawlessly. got exception 1 of users: findviewbyid fails npe somewhere in findviewtraversal.

so, can cause?

the android ui toolkit not thread-safe , must manipulated on ui thread.

taken painless threading.

because it's not thread-safe, don't know happen if use api in thread. might work, might not work, might work of time, might never work or might work , breaks other things. can't tell.

thus, if want correct application, must in ui thread.


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