How to use textview.getLayout()? It returns null

Question

I’m trying set a layout for textview so I can use getEllipsisCount() method. But below code returns null as layout value. How can I take layout and

Answer 1

I recently encountered this problem myself. For any newcomers to this thread, the accepted answer by @Pragnani along with the comment from @dimsuz provides a nice and compact solution. Adding an OnPreDrawListener to the view tree of the text view, wait for a reference to a layout and use it, and lastly remove the listener after any work requiring the layout is finished.

Given the example code from OP, implementing the solution could look something like this:

public class MainActivity extends Activity implements ViewTreeObserver.OnPreDrawListener {

    // maintain a reference to the view so we can later remove the listener
    private TextView mytextview;

    @Override
    public boolean onPreDraw() {
        Layout layout = mytextview.getLayout();
        if (layout != null) {

            // use layout here...
            int n = layout.getEllipsisCount(0);

            // work requiring a layout is finished; remove listener from view
            mytextview.getViewTreeObserver().removeOnPreDrawListener(this);
        }
        return true;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mytextview = (TextView) findViewById(R.id.textView1);

        // add listener to the view
        mytextView.getViewTreeObserver().addOnPreDrawListener(this);
    }
}