Android GridView 绘制分隔线 [英] Android GridView draw dividers

问题描述

我想知道在 GridView 中的项目(当前是文本视图)之间绘制分隔线的最简单方法.我能想到的唯一方法是在这些文本视图周围绘制边框，这样当它们组合在一起时，它们看起来就像连续的水平和垂直分隔线.

I'd like to know the simplest way to draw dividers between items (currently textviews) within a GridView. The only way I can think of is to draw borders around those textviews so when combined, they look like continuous horizontal and vertical dividers.

列表视图有 setDivider() 而网格视图没有吗?

There is a setDivider() for listviews but not gridviews?

谢谢.

推荐答案

很遗憾，在查看源代码后，除了采取为每个单元格添加边框的方法之外，我找不到任何简单的添加边框的方法.作为参考，我将在这里发布我的解决方案.

Unfortunately, after looking at the source code, I could not see any easy way to add borders other than taking the approach of adding borders to the each cell. As a reference, I will post my solution here.

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal"
    android:background="@drawable/list_selector">

    <!-- Cell contents -->

</LinearLayout>

list_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item 
        android:state_selected="true" 
        android:drawable="@drawable/item_border_selected" 
    />
    <item 
        android:state_pressed="true" 
        android:drawable="@drawable/item_border_selected" 
    />
    <item
        android:drawable="@drawable/item_border" 
    />
</selector>

item_border.xml

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid 
        android:color="@android:color/transparent" 
    />
    <stroke 
        android:width="1px" 
        android:color="@color/list_divider" 
    />
</shape>

item_border_selected.xml

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid 
        android:color="@color/list_select" 
    />
    <stroke 
        android:width="1px" 
        android:color="@color/list_divider" 
    />
</shape>

items_view.xml

<?xml version="1.0" encoding="utf-8"?>
<GridView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_marginLeft="-1px"
    android:layout_marginRight="-1px"
    android:listSelector="@android:color/transparent"
/>

由于所有行在加入相邻单元格时尺寸都会加倍，因此我将分隔线大小设为 1px 而不是 1dp，因此它在某些屏幕上不会显得太大.此外，我使网格视图具有负边距以隐藏两侧的线条.我希望这可以帮助别人.

Since all lines double in size as they join their neighboring cells, I made the divider size 1px instead of 1dp so it doesn't appear too large on some screens. Also, I made the grid view have negative margins to hide the lines on either side. I hope this helps someone.

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