Programmatically set android:layout_centerHorizontal

Question

In xml you can do the following:

<TextView
    ...
    android:layout_centerHorizontal="true"
    ...
/>

How would I, when I have the instance of TextView, do this programmatically?

score 112 · Accepted Answer · answered Aug 29 '11 at 18:28

112

You should use the addRule method of the RelativeLayout.LayoutParams class.

layoutparams.addRule(RelativeLayout.CENTER_HORIZONTAL);
mTextView.setLayoutParams(layoutParams);

answered Aug 29 '11 at 18:28

Ron

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My browser didn't show yours when I added mine. You posted yours first so you get my vote. – nEx.Software Aug 29 '11 at 18:34
note to set if FALSE, you have to create a new layoutParams from scratch without CENTER_HORIZONTAL and then assign it – max4ever Oct 05 '12 at 10:51
1

@max4ever I think you could just use removeRule() – Brandon Aug 22 '15 at 16:05

score 28 · Answer 2 · answered Aug 29 '11 at 18:31

28

Assuming you have a TextView called stored in a variable tv:

RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) tv.getLayoutParams();
lp.addRule(RelativeLayout.CENTER_HORIZONTAL);
tv.setLayoutParams(lp);

Should do the trick.

answered Aug 29 '11 at 18:31

nEx.Software

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Be sure to check `lp`. `getLayoutParams` can return null – Miguelos Aug 05 '16 at 09:46

score 1 · Answer 3 · answered May 31 '22 at 10:59

After 10 minutes of fighting I found how to do it in Kotlin:

N.B. - I am using view binding

val centerHorizontal = binding.tvOccupantName.layoutParams as RelativeLayout.LayoutParams
centerVertical.addRule(RelativeLayout.CENTER_HORIZONTAL)
binding.tvOccupantName.layoutParams = centerHorizontal

Hope it helps!

score 0 · Answer 4 · answered Feb 11 '22 at 14:14

Assume that txtPhone is the textview that we are trying to place it center in horizontal.

If you are using Java then use the following code,

RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) txtPhone.getLayoutParams();
layoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
txtPhone.setLayoutParams(layoutParams);

If you are using Kotlin then use the following code,

val layoutParams = txtPhone.getLayoutParams() as RelativeLayout.LayoutParams
layoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL)
txtPhone.setLayoutParams(layoutParams)

Programmatically set android:layout_centerHorizontal

4 Answers4