Android ImageView return getWidth, getHeight zero

Question

I am having problem withh the getWidth / getheight function of ImageView. My xml is as follows:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/bonus_popup"
    android:visibility="gone"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <ImageView
        android:id="@+id/todaybonus"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:adjustViewBounds="true"
        android:src="@drawable/startscreen_todaybonus" />
    <ImageView android:id="@+id/ok_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="acceptBonus"
        android:background="#000000"></ImageView>
</RelativeLayout>

and my code is as follows:

if (isDisplayBonus){
    set_blur_background();
    bonusPopup.setVisibility(0);
    Log.i(TAG, "Bonus width: " + todayBonus.getWidth());
    Log.i(TAG, "Bonus height: " + todayBonus.getHeight());
}

Please help me solve this proble,. Thank you in advance.

what is bonusPopup here? Paste the relevant part at least. – Yauraw Gadav Dec 25 '12 at 09:57 — Yauraw Gadav, Dec 25 '12 at 09:57
Hi Gaurav, bonusPopup is the relativelayout – Thanh Bui Dec 26 '12 at 02:28 — Thanh Bui, Dec 26 '12 at 02:28
Activity code? from Top to bottom. – Yauraw Gadav Dec 26 '12 at 07:52 — Yauraw Gadav, Dec 26 '12 at 07:52

score 8 · Answer 1 · answered Dec 26 '12 at 16:06

8

Well, I have found the reason. When I set the visibility, the view had not actually been drawn, so I couldn't use getHeight and getWidth function. I found the solution: use ViewTreeObserver

todayBonus.getViewTreeObserver().addOnPreDrawListener(
    new ViewTreeObserver.OnPreDrawListener() {
        public boolean onPreDraw() {
        int finalHeight = todayBonus.getMeasuredHeight();
        int finalWidth = todayBonus.getMeasuredWidth();
            // Do your work here
            return true;
    }
    });

answered Dec 26 '12 at 16:06

Thanh Bui

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where do you put this? Inside the onCreate method? – yrazlik Aug 16 '13 at 08:46
plz tell me if u find out – ChuckKelly Apr 30 '14 at 03:38

score 4 · Answer 2 · edited Dec 25 '12 at 10:06

4

May be you are calling getWidth() and getHeight() too early. The UI has not been sized and laid out on the screen yet, and as a result, the methods are correctly returning 0. Review your whole code again. Or paste your complete code here.

edited Dec 25 '12 at 10:06

biziclop

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answered Dec 25 '12 at 09:53

Rahul

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I have already put my code here. I called getWidth function after letting the view appear. – Thanh Bui Dec 25 '12 at 10:02

Android ImageView return getWidth, getHeight zero

2 Answers2

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