CODEWITHSUNDEEP
javaandroidmultithreading
Nomiluks
Nomiluks

Reputation: 2092

Is it possible to access UI elements from other than the Main thread?

I have read from many tutorials and online resources that we can not access UI elements from other than the main threads. Where, we can access UI elements using handlers, runOnUiThread or AsyncTask. But, here I have a question regarding this from the following piece of code.

public class MainActivity extends Activity {

ProgressBar progress;
TextView text;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    progress = (ProgressBar) findViewById(R.id.progreeBar);
    text = (TextView) findViewById(R.id.loading);
    Thread thread = new Thread(new myThread());
    thread.start();

}

public class myThread implements  Runnable{

    @Override
    public void run() {
        progress.setProgress(50);
        text.setText("counter: "+50);
    }
}
}

Code Output

In the above code, I can access the UI elements from another thread without using any handler, runOnUiThread, or AsyncTask. I am curious that why I have no error on accessing UI elements from outside the Main Thread?

Upvotes: 0

Views: 333

Answers (1)

Pr38y
Pr38y

Reputation: 1565

Yes you can update UI from other thread but you should avoid it. Because as per Android documentation

Andoid UI toolkit is not thread-safe

Upvotes: 1

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