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How to set the color of an Android ScrollView fading edge?

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By User



I have an Android scrollview with a white background. The fading edge is a white translucent gradient. I would like to change it be black instead of white. I have a ListView in the same project with a white background that has a black fading edge by default, but I can't find where (if anywhere) that was set.




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  1. Tips For AllApril 3, 2012 at 7:20 AM

    Just found it out by trial and error.

    Simply set android:background="@color/yourColor" for the <ScrollView>. It will set the shadow to the given colour.

    ReplyDelete
  2. Tips For AllApril 3, 2012 at 7:20 AM

    If you want a different color fading edge than the background, you have to override the ScrollView's getSolidColor() method. For example:

    @Override
    public int getSolidColor() {
    return Color.rgb(0x30, 0x30, 0x30);
    }

    ReplyDelete
  3. Tips For AllApril 3, 2012 at 7:20 AM

    Fading edge color is controlled by the android:cacheColorHint attribute.

    E.g.:

    <ScrollView android:cacheColorHint="#ff000000" android:background="#ffffffff" />

    will set the background to white, and the cacheColorHint is used to draw the fading edge color -- in this case, it would be black.

    ReplyDelete
  4. Tips For AllApril 3, 2012 at 7:20 AM

    If you don't know what changed the color of your fading edge, it was probably the application of a style or theme. Check your manifest for android:theme="something" in an Activity. If the theme is from the group android.R.style.Theme.Light the edge will be white. The default android.R.style.Theme and android.R.style.Theme.Black will have black fading edges. Themes also affect other attributes, so check out the attributes fully before you throw them in for one thing.

    ReplyDelete

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