安卓 TextView

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已于 2022-07-04 09:53:58 修改

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分类专栏：安卓文章标签： android

于 2022-07-04 09:52:52 首次发布

本文链接：https://blog.youkuaiyun.com/qq_52410477/article/details/125594077

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本文详细介绍了Android中的TextView组件，包括layout_width、layout_height、id、text、textColor、textSize、background和gravity等属性的使用。同时，重点讲解了如何为TextView添加阴影效果，通过设置shadowColor、shadowRadius、shadowDx和shadowDy属性实现个性化视觉效果。

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文章目录

TextView

TextView

（文本框）

属性

layout_width

控制宽度
属性值

match_parent 和父容器一样
wrap_content 匹配自身大小
数字后缀 dp eg: 20dp

layout_height

控制高度
属性值和宽度一样

id

eg:android:id="@+id/tv"
只能是小写
可在java中找到控件
findViewById(R.id.tv)

text

设置TextView中的内容
和java代码中setText的作用一样， Java代码会覆盖在xml中的设置属性

textColor

设置文字颜色
#00(透明度)00(红色)00(绿色)00(蓝色)

background

背景色
颜色或者是图片

gravity

<attr name="gravity">
        <!-- Push object to the top of its container, not changing its size. -->
        <flag name="top" value="0x30" />
        <!-- Push object to the bottom of its container, not changing its size. -->
        <flag name="bottom" value="0x50" />
        <!-- Push object to the left of its container, not changing its size. -->
        <flag name="left" value="0x03" />
        <!-- Push object to the right of its container, not changing its size. -->
        <flag name="right" value="0x05" />
        <!-- Place object in the vertical center of its container, not changing its size. -->
        <flag name="center_vertical" value="0x10" />
        <!-- Grow the vertical size of the object if needed so it completely fills its container. -->
        <flag name="fill_vertical" value="0x70" />
        <!-- Place object in the horizontal center of its container, not changing its size. -->
        <flag name="center_horizontal" value="0x01" />
        <!-- Grow the horizontal size of the object if needed so it completely fills its container. -->
        <flag name="fill_horizontal" value="0x07" />
        <!-- Place the object in the center of its container in both the vertical and horizontal axis, not changing its size. -->
        <flag name="center" value="0x11" />
        <!-- Grow the horizontal and vertical size of the object if needed so it completely fills its container. -->
        <flag name="fill" value="0x77" />
        <!-- Additional option that can be set to have the top and/or bottom edges of
             the child clipped to its container's bounds.
             The clip will be based on the vertical gravity: a top gravity will clip the bottom
             edge, a bottom gravity will clip the top edge, and neither will clip both edges. -->
        <flag name="clip_vertical" value="0x80" />
        <!-- Additional option that can be set to have the left and/or right edges of
             the child clipped to its container's bounds.
             The clip will be based on the horizontal gravity: a left gravity will clip the right
             edge, a right gravity will clip the left edge, and neither will clip both edges. -->
        <flag name="clip_horizontal" value="0x08" />
        <!-- Push object to the beginning of its container, not changing its size. -->
        <flag name="start" value="0x00800003" />
        <!-- Push object to the end of its container, not changing its size. -->
        <flag name="end" value="0x00800005" />
    </attr>

带阴影的TextView

属性
shadowColor ：设置阴影颜色
shadowRadius：设置阴影模糊程度
shadowDx：水平偏移
shadowDy：垂直偏移

代码：

 <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:textSize="20dp"
        android:shadowColor="@color/purple_700"
        android:shadowRadius="3.0"
        android:shadowDx="10"
        android:shadowDy="10" />

效果图

在这里插入图片描述