How to change existing TextView style in action

Question

I have some intent with set of TextViews and a Button. If user clicks the button and there is some error I want to change look of one TextView. E.g. change the border to red and make font bold. I wrote a style for it but I have not found method setStyle on the TextView. After some self study I realized that Android does not support setting the style programmatically. There are some workarounds, when you create the intent source. But my intent already exists, it seems odd to recreate it.

Could you tell me the proper way?

use the workaround and create the TextView again
forget the styles and use java methods to decorate existing TextView
something else

sonallux · Answer 1 · 2015-03-09T05:58:10.343

2

Changing the style of the textview directly does not work as you know. But you can create a second textview with other styles in your layout, which you can show up if needed.

Just add this xml attribute android:visibility="gone" to the second textview, so this second textview is not displayed at first, but available.

When you now want to change the style of your textview, you simple need to swap the two textviews by hidding the first one and showing the second one

    textView1.setVisibility(View.GONE);
    textView2.setVisibility(View.VISIBLE);

edited Mar 09 '15 at 05:58

answered Mar 08 '15 at 14:58

sonallux

83
5

Sorry I did not get what you want to express / how it relates to my question. – Leos Literak Mar 08 '15 at 20:10
Ok, I have edited my answer, I hope you can understand it now. – sonallux Mar 09 '15 at 06:01
This is interesting "workaround". I am not thrilled that I would have to duplicate each TextView and then look up them. – Leos Literak Mar 09 '15 at 19:53

score 1 · Answer 2 · edited Mar 22 '15 at 17:09

1

You can try using setTextAppearance() on the textview. The link is: setTextAppearance

Your style will need TextAppearance.SomeThing.SomeOtherThing as the parent.

Use R.style.YourStyleName as the integer argument.

edited Mar 22 '15 at 17:09

Jared Burrows

54,294
25
151
185

answered Mar 01 '15 at 09:07

Athena

476
1
4
12

Thanks, it works for TextView. The border is not displayed. I must dig into it later. – Leos Literak Mar 01 '15 at 09:26
@LeosLiterak Yes, the border or bg is not covered by TextAppearance. Use separate logic to get that going. – Athena Mar 01 '15 at 09:29

score 1 · Accepted Answer · edited May 23 '17 at 12:15

1

I used these two answers to make it work:

and the code is:

ViewManager parent = (ViewManager) unknown.getParent();
parent.removeView(unknown);
TextView newUnknown = (TextView)getLayoutInflater().inflate(R.layout.tvtemplate, null);
newUnknown.setId(unknown.getId());
parent.addView(newUnknown, unknown.getLayoutParams());
unknown = newUnknown;

edited May 23 '17 at 12:15

Community

1
1

answered Mar 09 '15 at 20:19

Leos Literak

8,805
19
81
156

1

thanks finally some understanding of how to use the inflator approach to change style at runtime. but you have to ask, is it really possible that google still (6/10/16) has no dynamic styles?? – tom Jun 09 '16 at 22:29

How to change existing TextView style in action

3 Answers3