Why getMeasuredWidth() returns 0?

Question

In my activity onCreate() method I created a View and hardcoded its width and height to be equal to 50. Then I call measure method. After that I expect that getMeasuredWidth() returns 50. But it returns 0.

    View v = new View(this);
    v.setLayoutParams(new ViewGroup.LayoutParams(50, 50));

    final int spec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
    v.measure(spec, spec);
    final int w = v.getMeasuredWidth();
    Log.e("aaa", String.valueOf(w)); // output is 0

What am I doing wrong? How can I force to calculate measured view's size? I do not want until it has been drawn, etc.

you may want to read again the documentation of `makeMeasureSpec` — Blackbelt, Jan 27 '17 at 12:13

score 2 · Answer 1 · edited Jan 27 '17 at 12:12

2

private void measureDimension() {
    view.post(new Runnable() {
        @Override
        public void run() {
            int height = view.getMeasuredHeight();
            int width = view.getMeasuredWidth();

        }
    });
}

You can call this method in onCreate.

edited Jan 27 '17 at 12:12

Allan Pereira

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answered Jan 27 '17 at 12:10

Ganesh Kanna

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Because, this can't be done during onCreate or onResume, as the duplicate explained. – AxelH Jan 27 '17 at 12:12

Why getMeasuredWidth() returns 0?

1 Answers1