View's getWidth() and getHeight() returns 0

JavaAndroidAndroid LayoutGetter

Java Problem Overview

I am creating all of the elements in my android project dynamically. I am trying to get the width and height of a button so that I can rotate that button around. I am just trying to learn how to work with the android language. However, it returns 0.

I did some research and I saw that it needs to be done somewhere other than in the onCreate() method. If someone can give me an example of how to do it, that would be great.

Here is my current code:

package com.animation;

import android.os.Bundle;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.Button;
import android.widget.LinearLayout;

public class AnimateScreen extends Activity {

//Called when the activity is first created.
public void onCreate(Bundle savedInstanceState) {
    LinearLayout ll = new LinearLayout(this);
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    layoutParams.setMargins(30, 20, 30, 0);

    Button bt = new Button(this);
    RotateAnimation ra = new RotateAnimation(0,360,bt.getWidth() / 2,bt.getHeight() / 2);
    ra.setInterpolator(new LinearInterpolator());


Any help is appreciated.

Java Solutions

Solution 1 - Java

The basic problem is, that you have to wait for the drawing phase for the actual measurements (especially with dynamic values like wrap_content or match_parent), but usually this phase hasn't been finished up to onResume(). So you need a workaround for waiting for this phase. There a are different possible solutions to this:

1. Listen to Draw/Layout Events: ViewTreeObserver

A ViewTreeObserver gets fired for different drawing events. Usually the OnGlobalLayoutListener is what you want for getting the measurement, so the code in the listener will be called after the layout phase, so the measurements are ready:

view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            public void onGlobalLayout() {
                view.getHeight(); //height is ready

Note: The listener will be immediately removed because otherwise it will fire on every layout event. If you have to support apps SDK Lvl < 16 use this to unregister the listener:

public void removeGlobalOnLayoutListener (ViewTreeObserver.OnGlobalLayoutListener victim)

2. Add a runnable to the layout queue:

Not very well known and my favourite solution. Basically just use the View's post method with your own runnable. This basically queues your code after the view's measure, layout, etc. as stated by Romain Guy:

> The UI event queue will process events in order. After > setContentView() is invoked, the event queue will contain a message > asking for a relayout, so anything you post to the queue will happen > after the layout pass


final View view=//smth;
... Runnable() {
            public void run() {
                view.getHeight(); //height is ready

The advantage over ViewTreeObserver:

  • your code is only executed once and you don't have to disable the Observer after execution which can be a hassle
  • less verbose syntax


3. Overwrite Views's onLayout Method

This is only practical in certain situation when the logic can be encapsulated in the view itself, otherwise this is a quite verbose and cumbersome syntax.

view = new View(this) {
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        super.onLayout(changed, l, t, r, b);
        view.getHeight(); //height is ready

Also mind, that onLayout will be called many times, so be considerate what you do in the method, or disable your code after the first time

4. Check if has been through layout phase

If you have code that is executing multiple times while creating the ui you could use the following support v4 lib method:

View viewYouNeedHeightFrom = ...
if(ViewCompat.isLaidOut(viewYouNeedHeightFrom)) {

> Returns true if view has been through at least one layout since it was > last attached to or detached from a window.

Additional: Getting staticly defined measurements

If it suffices to just get the statically defined height/width, you can just do this with:

But mind you, that this might be different to the actual width/height after drawing. The javadoc describes the difference in more detail:

> The size of a view is expressed with a width and a height. A view > actually possess two pairs of width and height values. > > The first pair is known as measured width and measured height. These > dimensions define how big a view wants to be within its parent (see > Layout for more details.) The measured dimensions can be obtained by > calling getMeasuredWidth() and getMeasuredHeight(). > > The second pair is simply known as width and height, or sometimes > drawing width and drawing height. These dimensions define the actual > size of the view on screen, at drawing time and after layout. These > values may, but do not have to, be different from the measured width > and height. The width and height can be obtained by calling getWidth() > and getHeight().

Solution 2 - Java

We can use

 public void onWindowFocusChanged(boolean hasFocus) {
  //Here you can get the size!

Solution 3 - Java

You are calling getWidth() too early. The UI has not been sized and laid out on the screen yet.

I doubt you want to be doing what you are doing, anyway -- widgets being animated do not change their clickable areas, and so the button will still respond to clicks in the original orientation regardless of how it has rotated.

That being said, you can use a dimension resource to define the button size, then reference that dimension resource from your layout file and your source code, to avoid this problem.

Solution 4 - Java

I used this solution, which I think is better than onWindowFocusChanged(). If you open a DialogFragment, then rotate the phone, onWindowFocusChanged will be called only when the user closes the dialog):

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

    	public void onGlobalLayout() {
			// Ensure you call it only once :

    		// Here you can get the size :)

Edit : as removeGlobalOnLayoutListener is deprecated, you should now do :

public void onGlobalLayout() {
    // Ensure you call it only once :
	if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
	else {

	// Here you can get the size :)

Solution 5 - Java

If you need to get width of some widget before it is displayed on screen, you can use getMeasuredWidth() or getMeasuredHeight().

myImage.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
int width = myImage.getMeasuredWidth();
int height = myImage.getMeasuredHeight();

Solution 6 - Java

As Ian states in this Android Developers thread:

> Anyhow, the deal is that layout of the > contents of a window happens > after all the elements are constructed and added to their parent > views. It has to be this way, because > until you know what components a View > contains, and what they contain, and > so on, there's no sensible way you can > lay it out. > > Bottom line, if you call getWidth() > etc. in a constructor, it will return > zero. The procedure is to create all > your view elements in the constructor, > then wait for your View's > onSizeChanged() method to be called -- > that's when you first find out your > real size, so that's when you set up > the sizes of your GUI elements. > > Be aware too that onSizeChanged() is > sometimes called with parameters of > zero -- check for this case, and > return immediately (so you don't get a > divide by zero when calculating your > layout, etc.). Some time later it > will be called with the real values.

Solution 7 - Java

I would rather use OnPreDrawListener() instead of addOnGlobalLayoutListener(), since it is called a bit earlier than other listeners.

    view.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener()
        public boolean onPreDraw()
            if (view.getViewTreeObserver().isAlive())
            // put your code here
            return true;

Adjusted the code according to comment of @Pang. onPreDraw method should return true.

Solution 8 - Java

AndroidX has multiple extension functions that help you with this kind of work, inside androidx.core.view

You need to use Kotlin for this.

The one that best fits here is doOnLayout:

> Performs the given action when this view is laid out. If the view has been laid out and it has not requested a layout, the action will be performed straight away otherwise, the action will be performed after the view is next laid out. > >The action will only be invoked once on the next layout and then removed.

In your example:

bt.doOnLayout {
    val ra = RotateAnimation(0,360,it.width / 2,it.height / 2)
    // more code

Dependency: androidx.core:core-ktx:1.0.0

Solution 9 - Java

A Kotlin Extension to observe on the global layout and perform a given task when height is ready dynamically.


view.height { Log.i("Info", "Here is your height:" + it) }


fun <T : View> T.height(function: (Int) -> Unit) {
    if (height == 0)
        viewTreeObserver.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {
            override fun onGlobalLayout() {
    else function(height)

Solution 10 - Java

One liner if you are using RxJava & RxBindings. Similar approach without the boilerplate. This also solves the hack to suppress warnings as in the answer by Tim Autin.

      .subscribe(aVoid -> {
           // width and height have been calculated here

This is it. No need to be unsubscribe, even if never called.

Solution 11 - Java

It happens because the view needs more time to be inflated. So instead of calling view.width and view.height on the main thread, you should use { ... } to make sure that your view has already been inflated. In Kotlin:{width}{height}

In Java you can also call getWidth() and getHeight() methods in a Runnable and pass the Runnable to method. Runnable() {
        public void run() {

Solution 12 - Java

Maybe this helps someone:

Create an extension function for the View class > filename: ViewExt.kt

fun View.afterLayout(what: () -> Unit) {
    if(isLaidOut) {
    } else {
        viewTreeObserver.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {
            override fun onGlobalLayout() {

This can then be used on any view with:

view.afterLayout {
    do something with view.height

Solution 13 - Java

Height and width are zero because view has not been created by the time you are requesting it's height and width . One simplest solution is Runnable() {
        public void run() {
            view.getHeight(); //height is ready
            view.getWidth(); //width is ready

This method is good as compared to other methods as it is short and crisp.

Solution 14 - Java

If you are using Kotlin

  customView.viewTreeObserver.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {

            override fun onGlobalLayout() {

                if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
                else {

                // Here you can get the size :)
                viewWidth = customView.width

Solution 15 - Java

Answer with post is incorrect, because the size might not be recalculated.
Another important thing is that the view and all it ancestors must be visible. For that I use a property View.isShown.

Here is my kotlin function, that can be placed somewhere in utils:

fun View.onInitialized(onInit: () -> Unit) {
    viewTreeObserver.addOnGlobalLayoutListener(object : OnGlobalLayoutListener {
        override fun onGlobalLayout() {
            if (isShown) {

And the usage is:

myView.onInitialized {
    Log.d(TAG, "width is: " + myView.width)

Solution 16 - Java

well , you can use addOnLayoutChangeListener

you can use it in onCreate in Activity or onCreateView in Fragment

@Edit dont forget to remove it because in some cases its trigger infinite loop

myView.addOnLayoutChangeListener(object : View.OnLayoutChangeListener{
                override fun onLayoutChange(
                    v: View?, left: Int, top: Int, right: Int, bottom: Int, oldLeft: Int, oldTop: Int, oldRight: Int, oldBottom: Int
                ) {
                    if (v?.width > 0 && v?.height > 0){
                        // do something
                        Log.i(TAG, "view : ${view.width}")
                        // remove after finish

Solution 17 - Java

For Kotlin:

I have faced a production crash due to use view.height/ view.width which lead to NaN while I was using which sometimes view diemsions returned with 0 value.


Use view.doOnPreDraw { // your action here} which is:

  • OneShotPreDrawListener so it called only one time.
  • Implements OnPreDrawListener which make sure view is layouted and measured

Solution 18 - Java

Gone views returns 0 as height if app in background. This my code (1oo% works)

fun View.postWithTreeObserver(postJob: (View, Int, Int) -> Unit) {
    viewTreeObserver.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {
        override fun onGlobalLayout() {
            val widthSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)
            val heightSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)
            measure(widthSpec, heightSpec)
            postJob(this@postWithTreeObserver, measuredWidth, measuredHeight)
            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
            } else {

Solution 19 - Java

We need to wait for view will be drawn. For this purpose use OnPreDrawListener. Kotlin example:

val preDrawListener = object : ViewTreeObserver.OnPreDrawListener {

                override fun onPreDraw(): Boolean {

                    // code which requires view size parameters

                    return true


Solution 20 - Java

This is a little old, but was having trouble with this myself (needing to animate objects in a fragment when it is created). This solution worked for me, I believe it is self explanatory.

class YourFragment: Fragment() {
    var width = 0
    var height = 0

override fun onCreateView(
    inflater: LayoutInflater, container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    // Inflate the layout for this fragment
    val root = inflater.inflate(R.layout.fragment_winner_splash, container, false)
    container?.width.let {
        if (it != null) {
            width = it
    container?.height.let {
        if (it != null) {
            height = it
    return root

Solution 21 - Java

If you're worried about overworking the onDraw method, you can always set the dimension as null during construction and then only set the dimension inside of onDraw if it's null.

That way you're not really doing any work inside onDraw

class myView(context:Context,attr:AttributeSet?):View(context,attr){
var height:Float?=null

override fun onDraw(canvas:Canvas){
    if (height==null){height=this.height.toFloat()}


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