getmeasuredheight() and getmeasuredwidth() returns 0 after View.measure()

Question

After measuring a View with a constant dimensions with view.measure(), the getMeasuredHeight() and getMeasureWidth() is returning 0.

layout_view.xml, layout which is inflated to create the view

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="100dp"
    android:layout_height="100dp">
</FrameLayout>

function which measures the dimensions

public void measureView(Context context){
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view = inflater.inflate(R.layout.layout_view,null,false);

    view.measure( View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);

    Log.d(TAG,"Error width : " + view.getMeasuredWidth());
    Log.d(TAG,"Error height : " + view.getMeasuredHeight());

}

Answer 1

When you call view.getMeasuredWidth() in onCreate() or onCreateView(), the view has not been drawn yet. So you need to add a listener and will get a callback when the view is being drawn. Just like this in my code:

final ViewTreeObserver vto = view.getViewTreeObserver();
if (vto.isAlive()) {
    vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            int viewWidth = view.getMeasuredWidth();
            // handle viewWidth here...

            if (Build.VERSION.SDK_INT < 16) {
                vto.removeGlobalOnLayoutListener(this);
            } else {
                vto.removeOnGlobalLayoutListener(this);
            }
        }
    });
}

NOTE: Remove the listener for better performance!

Don't call vto.removeOnGlobalLayoutListener(this) to remove the listener. Call it like this:

vto.getViewTreeObserver()

Answer 2

Are you measuring the view in onCreate(). The view isn't drawn yet. You have to wait until a time after the view is drawn before you can measure it.

Simple solution for this is to post a runnable to the layout. The runnable will be executed after the layout has happened.

For more info See this post

Edit try to change

view.measure( View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);

to

view.measure( View.MeasureSpec.EXACTLY, View.MeasureSpec.EXACTLY);