In reference to these questions :
Adding gradient effect to TextView in a ListView generates NPE
and
How to change color and font on ListView
I would like to know how to go about setting the background of a TextView
in a ListView
with gradient effect?
In one of the questions above, I ended up having the gradient effect added to the text in the TextView
. And after skimming through the second question, it seems I can add only fixed background colors.
How do I go about adding gradient to background? Should I make a CustomListAdapter
?
To change the background color of TextView widget, set the background attribute with required Color value. You can specify color in rgb , argb , rrggbb , or aarrggbb formats. The background color is applied along the width and height of the TextView.
To create a gradient color we need to create a . xml file in the drawable folder. So go to app -> res -> drawable and right-click on drawable -> New -> Drawable Resource File and create gradient_drawable. xml file.
Select the Gradient tool in the toolbar. In the selected artwork you'll see the gradient annotator, which shows the gradient slider and the color stops. Double-click a color stop on the artwork to edit the color, drag the color stops, click beneath the gradient slider to add new color stops, and more.
You just need to create a drawable resource (see an example below), and add it to the layout you created for your ListItem.
The drawable (in your res\drawable folder - name it whatever - listgrad.xml for ex) could look like:
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <gradient android:startColor="@color/gradient_start" android:endColor="@color/gradient_end" android:angle="-270" /> </shape>
The you would add it to the layout for your list item (the layout.xml file you define for this) like this code snippet:
<TextView android:id="@+id/ranking_order" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/list_grad" /> ...
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