Set textview fading in Android 4.0.3

问题:

I've just tried to implement the fade effect for TextView in Android 4.0.3; however, it doesn't work.

fadingEdge="horizontal"
singleLine="true"
ellipsize="marquee"

This code works perfectly for 2.3.7 and below, but not working for 4.0.3. I'm wondering why is that so? and how to make fade effect for TextView?

My question is the same as this one: http://groups.google.com/group/android-developers/browse_thread/thread/97131b20de8b2ebd , but no answer yet.

回答1:

It is a bit late, but that may help people who have the same question.

I have had this problem on different phones, and it could come from that :

• on Android 4.0.x, it seems that the TextView have to be focusable, otherwise fade effect won't work. So try adding this :

  android:focusable="true" android:focusableInTouchMode="true"

• if that does not work, you could try android:lines="1", but i think that android:singleLine="true", which is deprecated, works better

• sometimes, you need to programmatically call setSelected(true) on the textView to get the fade effect. Please check this link : Is there a way to make ellipsize="marquee" always scroll?

回答2:

As of API level 14 fadingEdge is deprecated and ignored so in order to make fading edge work on Android 4.0.3 you must use requiresFadingEdge instead.