Issue
I'm trying to hide a smiley in a SpannableStringBuilder
(which is used in a DynamicLayout
).
At first I tried
ImageSpan[] spans = spannable.getSpans(0, length, ImageSpan.class);
spans[0].getDrawable().setAlpha(0);
It didn't work. I also tried
ImageSpan[] spans = spannable.getSpans(0, length, ImageSpan.class);
spans[0].getDrawable().setVisible(false, true);
Didn't work either.
The next code did work, but it doesn't preserve the size of the drawable, so the text around the smiley starts to "jump", that is not correct.
ImageSpan[] spans = spannable.getSpans(0, length, ImageSpan.class);
spannable.removeSpan(spans[0]);
Potentially, I could redraw the drawable, but it's an expensive operation. Why doesn't the drawable update? What am I missing?
Thanks in advance.
Solution
Okay, in my base drawable class I implemented the setAlpha
method in which I changed the paint object. After that I revalidated the view in which the drawable was. After that the draw
method in my drawable class gets executed and the alpha value changes
Answered By - serg66
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