CODEWITHSUNDEEP
androidmultithreadingandroid-layoutuser-interfacehandler
Perry Journey
Perry Journey

Reputation: 3

Android: Updating UI from thread in separate class

I am attempting to update a few UI elements in my app, after a separate class has been updated. The separate class is neither an activity nor a fragment. Could anyone point me in the right direction? Would a handler work well here, if so could you point me toward a acceptable example of handlers?

Upvotes: 0

Views: 282

Answers (3)

jtt
jtt

Reputation: 13541

You need to link the two classes together by perhaps implementing a callback mechanism that will be processed using a handler into your main application thread, assuming that your external class can register a callback with the Activity class.

Or more simply you could use context by allowing a reference to be passed from the Activity to your other class, but you want to make sure you don't leak context.

Upvotes: 0

Lucas Ferraz
Lucas Ferraz

Reputation: 4152

you can use this in a separe class.

public void setView(Activity activity, View view) {
activity.runOnUiThread(new Runnable() {
            public void run()
            {
                /update your view here
            }
        });
    }

You can get the view from your activity variable, instead of pass a view, if you prefere.

Upvotes: 1

Aftab Safdar
Aftab Safdar

Reputation: 668

You cannot update any UI elements from a different thread than the main thread. If you are using the main thread, you can pass the View to the method in the other class and make some changes with that.

Upvotes: 0

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