Get height and width of a layout programmatically

Question

I have designed an layout in which LinearLayout has 2 children LinearLayout and FrameLayout and in each child I put different views.

I just wanted to measure height and width of FrameLayout so that I could serve my purpose.

In program I am using

int height,width;

FrameLayout fr=(FrameLayout)findviewbyid(R.id.fr);
height=fr.getHeight();
width=fr.getWidth();

returns value as 0 for both

Even I tried with following code int height,width;

FrameLayout fr=(FrameLayout)findviewbyid(R.id.fr);
height=fr.getMeasuredHeight();
width=fr.getMeasuredWidth();

returns same value 0

and finally I tried with following code, int height,width;

FrameLayout fr=(FrameLayout)findviewbyid(R.id.fr);
height=fr.getgetLayoutParams().height();
width=fr.getLayoutParams().width;

returns me -2 and -1

I want the solution to get height and width of any layout programmatically?

Answer 1

The view itself, has it's own life cycle which is basically as follows:

• Attached

• Measured

• Layout

• Draw

So, depending on when are you trying to get the width/height you might not see what you expect to see, for example, if you are doing it during onCreate, the view might not even been measured by that time, on the other hand if you do so during onClick method of a button, chances are that by far that view has been attached, measured, layout, and drawn, so, you will see the expected value, you should implement a ViewTreeObserver to make sure you are getting the values at the proper moment.

LinearLayout layout = (LinearLayout)findViewById(R.id.YOUR VIEW ID);
ViewTreeObserver vto = layout.getViewTreeObserver(); 
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() { 
    @Override 
    public void onGlobalLayout() { 
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
                this.layout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
            } else {
                this.layout.getViewTreeObserver().removeOnGlobalLayoutListener(this);
            } 
        int width  = layout.getMeasuredWidth();
        int height = layout.getMeasuredHeight(); 

    } 
});

Answer 2

As CapDroid say, you are trying to get the size before the view drawn, another possible solution could be to do a Post with a runnable on the View:

mView.post(new Runnable() {
        @Override
        public void run() {
            int width = mView.getWidth();
            int height = mView.getHeight();
        }
}

Answer 3

Just wanted to add an answer here, since Koltin has some convenience methods to do this, which are a lot less ugly than adding and removing a onGlobalLayoutListener:

view.doOnLayout {
    it.measuredWidth
    it.measuredHeight
}

You can see more of the convinience methods here.