有没有一种简单的方法可以在 Android 视图的顶部和底部添加边框? [英] Is there an easy way to add a border to the top and bottom of an Android View?

问题描述

我有一个 TextView，我想在它的顶部和底部边框上添加一个黑色边框.我尝试将 android:drawableTop 和 android:drawableBottom 添加到 TextView，但这只会导致整个视图变黑.

I have a TextView and I'd like to add a black border along its top and bottom borders. I tried adding android:drawableTop and android:drawableBottom to the TextView, but that only caused the entire view to become black.

<TextView
    android:background="@android:color/green"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:drawableTop="@android:color/black"
    android:drawableBottom="@android:color/black"
    android:text="la la la" />

有没有办法在 Android 中轻松地为 View(特别是 TextView)添加顶部和底部边框?

Is there a way to easily add a top and bottom border to a View (in particular, a TextView) in Android?

推荐答案

在 android 2.2 中，您可以执行以下操作.

In android 2.2 you could do the following.

创建一个 xml drawable，例如/res/drawable/textlines.xml 并将其指定为 TextView 的背景属性.

Create an xml drawable such as /res/drawable/textlines.xml and assign this as a TextView's background property.

<TextView
android:text="My text with lines above and below"
android:background="@drawable/textlines"
/>

/res/drawable/textlines.xml

/res/drawable/textlines.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
      <shape 
        android:shape="rectangle">
            <stroke android:width="1dp" android:color="#FF000000" />
            <solid android:color="#FFDDDDDD" />

        </shape>
   </item>

   <item android:top="1dp" android:bottom="1dp"> 
      <shape 
        android:shape="rectangle">
            <stroke android:width="1dp" android:color="#FFDDDDDD" />
            <solid android:color="#00000000" />
        </shape>
   </item>

</layer-list>

这样做的缺点是您必须指定不透明的背景颜色，因为透明胶片不起作用.(至少我认为他们做到了，但我错了).在上面的示例中，您可以看到第一个形状 #FFdddddd 的纯色被复制到第二个形状的笔触颜色中.

The down side to this is that you have to specify an opaque background colour, as transparencies won't work. (At least i thought they did but i was mistaken). In the above example you can see that the solid colour of the first shape #FFdddddd is copied in the 2nd shapes stroke colour.

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