Android get programmatically created view's width

Question

I have TextView created programmatically, like that:

                TextView mTextView = new TextView(getApplicationContext());

                final LayoutParams params = new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
                ((MarginLayoutParams) params).setMargins(8, 8, 0, 0);

                mTextView.setText(mText);
                mTextView.setLayoutParams(params);
                mTextView.setPadding(2, 2, 2, 2);
                mTextView.setBackground(getResources().getDrawable(R.drawable.note_corps));

                tagMap.addView(mTextView);

                textViewsWidth = mTextView.getWidth();

But mTextView.getWidth() always returns 0

And if I try:

mTextView.getLayoutParams().width

It returns the LayoutParams corresponding value in the LayoutParams class (-1 or -2)

How can I get the view's width ?

EDIT I need to do this here:

            @Override
        public void onPostExecute(Hashtable<String, Integer> hash){
            final ScrollView tagMapScroll = (ScrollView) findViewById(R.id.tagMapScroll);
            final LinearLayout tagMap = (LinearLayout) findViewById(R.id.tagMap);
            final ArrayList<Integer> arr = new ArrayList<Integer>(hash.values());
            final Enumeration<String> e = hash.keys();
            int index = 0;
            int textViewsWidth = 0;

            while(e.hasMoreElements()){
                final TextView tV = new TextView(getApplicationContext());

                tV.setTextColor(Color.parseColor("#666666"));
                tV.setText(Html.fromHtml(randomColor() + e.nextElement()));
                tV.setTextSize(arr.get(index));

                final LayoutParams params = new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
                ((MarginLayoutParams) params).setMargins(8, 8, 0, 0);

                tV.setLayoutParams(params);
                tV.setPadding(2, 2, 2, 2);
                tV.setBackground(getResources().getDrawable(R.drawable.note_corps));

                tagMap.addView(tV);

                textViewsWidth += tV.getWidth();

                index++;
            }

            tagMapScroll.setVisibility(ScrollView.VISIBLE);

        }

EDIT SOLUTION I used this from @androiduser's answer:

mTextView.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
                int width = mTextView.getMeasuredWidth();
                int height = mTextView.getMeasuredHeight();

Problem solved !

Answer 1

I used this solution:

yourView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

    @Override
    public void onGlobalLayout() {
        // Ensure you call it only once
        yourView.getViewTreeObserver().removeOnGlobalLayoutListener(this);

        // Here you can get the size :)
    }
});

Answer 2

get this way:

tV.post(new Runnable() {
                    @Override
                    public void run() {
                        int width=tV.getMeasuredWidth();
                    }
                });

Answer 3

those values are constant value for FILL_PARENT and WRAP_CONTENT. If you want to check the view size you can try this way:

tagMap.addView(mTextView);
tagMap.post(new Runnable() {
                    @Override
                    public void run() {
                        mTextView. getWidth();
                    }
                });

you have to wait until android draws the TextView. This way you are posting a Runnable in the tagMap queue, that is executed, hopefully after the textview is draw (so it should be weight and height)

Answer 4

In this method you can get the width height of the view..

    @Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    int width = mTextView.getWidth();
    int height = mTextView.getHeight();
}

and define TextView mTextView as global