Android layaout Params

Question

I have a button with dimensions:

btn1.width = 100;
btn2.height = 150;

I used the following code to resize:

RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) btn1.getLayoutParams();
layoutParams.width = 200;
layoutParams.height = 300;
btn1.setLayoutParams(layoutParams);

When I did this:

int newSize = btn1.getWidth;

The newSize has value 100, but not 200. It resized the button well, but after the resize, btn1.getWidth still holds the previous value. How can I instantly get the set size?

Have you tried print something at Logs, to check if those lines were executed? — guisantogui, Mar 14 '16 at 17:17
Are executed. If after it shows, i touch the button and print the size it returns 200. If i ask for the width after i change it it return old one, but after it return the new one! — user3240604, Mar 14 '16 at 17:25

score 0 · Answer 1 · answered Mar 14 '16 at 17:32

0

The actual width of the View does not get updated immediately.

Your best bet is to cache the size when you set it.

answered Mar 14 '16 at 17:32

manabreak

5,415
7
39
96

There is not a way to update immediatly? Thats my problem, is not updating the width immediatly – user3240604 Mar 14 '16 at 17:35
@user3240604 Not really; this is the way Android is designed to handle the view updates. – manabreak Mar 14 '16 at 17:37

score 0 · Answer 2 · answered Mar 14 '16 at 18:16

0

You will not directly get the height/width after setting to a view. If you want then you can get in "post" method:

btn1.setWidth(200);
btn1.setHeight(300)
btn1.post(new Runnable() {
         @Override
         public void run() {
               Log.i("Tag", "Width:"+ btn1.getWidth() + " Height:" + btn1.getHeight());
         }
});

answered Mar 14 '16 at 18:16

Brijesh Chopda

195
2
11

What is a post method? – user3240604 Mar 15 '16 at 14:25
Post method will be called right after the button is resized. http://developer.android.com/reference/android/view/View.html#post(java.lang.Runnable) – Brijesh Chopda Mar 15 '16 at 17:12

Android layaout Params

2 Answers2