Scrollview&RecycleView&ListView&Viewpager的顶部/底部阴影颜色改变

Scrollview&RecycleView&ListView&Viewpager的顶部/底部阴影颜色改变

0 利用主题设置

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent"<
4000
/span>>@color/colorAccent</item>
<item name="android:colorEdgeEffect">@color/colorAccent</item>
</style>

但是注意,只能在api21以上设置



以下的方法为反射设置

1 Scrollview

牵扯到的两个属性

mEdgeGlowTop

,

mEdgeGlowBottom

,都为

EdgeEffect

类型

直接去反射改变颜色

这里以

mEdgeGlowTop

为例

Field topMethod = ScrollView.class.getDeclaredField("mEdgeGlowTop");
topMethod.setAccessible(true);
EdgeEffect top = (EdgeEffect) topMethod.get(scrollView);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
top.setColor(Color.RED);
}

2 RecycleView

RecycleView

有4个属性,

mLeftGlow, mTopGlow, mRightGlow, mBottomGlow

采用和

Scrollview

同样的方式既可以做到

3 ListView

listview是有一个

public

的方法的

/**
* Sets the drawable that will be drawn above all other list content.
* This area can become visible when the user overscrolls the list.
*
* @param header The drawable to use
*/
public void setOverscrollHeader(Drawable header) {
mOverScrollHeader = header;
if (mScrollY < 0) {
invalidate();
}
}

/**
* Sets the drawable that will be drawn below all other list content.
* This area can become visible when the user overscrolls the list,
* or when the list's content does not fully fill the container area.
*
* @param footer The drawable to use
*/
public void setOverscrollFooter(Drawable footer) {
mOverScrollFooter = footer;
invalidate();
}

4 viewpager

Viewpager

同样有两个属性,是左右的,反射方式同样适用

Scrollview

的,属性为

mLeftEdge

,

mRightEdge