android去掉ListView顶部和底部的蓝色渐变效果

private final Drawable mEdge;private final Drawable mGlow;

1 /**
2 * 去掉ListView顶部和底部的蓝色渐变
3 *
4 * &＃64;param absListView
5 */
6 public static void cancelFadingEdge(AbsListView absListView) {
7
8 // 创建EdgeEffect实例&＃xff0c;将mEdge和mGlow设置为空的Drawable
9 EdgeEffect edgeEffect &＃61; new EdgeEffect(absListView.getContext());
10 Class eeClz &＃61; edgeEffect.getClass();
11 setField(eeClz, "mEdge", edgeEffect, new ColorDrawable());
12 setField(eeClz, "mGlow", edgeEffect, new ColorDrawable());
13
14 // 给ListView的mEdgeGlowTop和mEdgeGlowBottom赋值
15 try {
16 Class lvClz &＃61; Class.forName("android.widget.AbsListView");
17 setField(lvClz, "mEdgeGlowTop", absListView, edgeEffect);
18 setField(lvClz, "mEdgeGlowBottom", absListView, edgeEffect);
19 } catch (Exception e) {
20 e.printStackTrace();
21 }
22 }
23
24 /**
25 * 通过反射的方式设置变量的值
26 *
27 * &＃64;param clz
28 * 属性所在类的Class
29 * &＃64;param fieldName
30 * 属性名
31 * &＃64;param obj
32 * 要赋值的对象
33 * &＃64;param value
34 * 值
35 */
36 private static void setField(Class clz, String fieldName, Object obj,
37 Object value) {
38 try {
39 Field field &＃61; clz.getDeclaredField(fieldName);
40 field.setAccessible(true);
41 field.set(obj, value);
42 } catch (Exception e) {
43 e.printStackTrace();
44 }
45 }

mEdge.set(edgeEffect, new ColorDrawable());
mEdgeGlowTop.set(absListView, edgeEffect);