


Detailed introduction to using XML resource files to define colors, styles, etc.
1. Use XML resource files to define colors. This method has good scalability and is easy to modify and share. For example, create a color.xml in the values directory.
<?xml version="1.0" encoding="utf-8"?> <resources> <color name="mycolor">#ffb52121</color> </resources>
defines a color named mycolor. You can get the color value by referencing mycolor elsewhere, such as
textView definition:
Android:textColor="@drawable/mycolor"
2. Use XML resource files to define styles and define a shape in res/drawable. xml file
Example code:
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" > <corners android:radius="5dp" /> <size android:height="30dp" android:width="20dp" /> <gradient android:startColor="#9933cc" android:endColor="#aa66cc" android:angle="90" /> <padding android:left="5dp" android:right="5dp" android:top="5dp" android:bottom="5dp"/> </shape> <?xml version="1.0" encoding="UTF-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" > <!-- 填充的颜色:这里设置背景透明 --> <solid android:color="@android:color/transparent" /> <!-- 边框的颜色 :不能和窗口背景色一样--> <stroke android:width="3dp" android:color="#ffffff" /> <!-- 设置按钮的四个角为弧形 --> <!-- android:radius 弧形的半径 --> <corners android:radius="5dip" /> <!-- padding:Button里面的文字与Button边界的间隔 --> <padding android:bottom="10dp" android:left="10dp" android:right="10dp" android:top="10dp" /> </shape>
Define the button
<Button android:id="@+id/roundButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/shape" android:text=" 圆角按钮 " />
Shape attributes in your Activity’s xml (such as activity_main.xml):
solid
Description: Internal padding
Attribute: android:color Fill color
Size
Description: Size
Attributes:
android:width 宽 android:height 高
gradient
Description: Gradient color
Attributes:
android:startColor渐变起始颜色 android:endColor渐变结束颜色 android:centerColor渐变中间颜色 android:angle 渐变的角度,angle=0时,渐变色是从左向右,然后逆时针方向转;当angle=90时,渐变色从上往下。angle必然是45的倍数 android:type 渐变类型:linear(线性)、radial(放射性,以开始色为中心)、sweep(扫描线式渐变) android:userLevel如果要使用LevelListDrawable对象,就要设置为true。设置true无渐变色,false有渐变色 android:grdientRadial渐变半径,只有设置type为radial时,此值才生效 android:centerX 渐变中心X点坐标的相对位置 android:centerY 渐变中心Y点坐标的相对位置
stroke
Description: Stroke
Attributes:
android:width 描边宽度 android:color 描边颜色 android:dashwidth描边样式为虚线时的宽度,值为0时为实线,值大于0时为虚线 android:dashGap 描边为虚线时,虚线之间的间隔
corners
Description: Rounded corners
Attributes:
android:radius 四个角半径值 android:topLeftRadius左上角半径值 android:topRightRadius右上角半径值 android:bottomLeftRadius右下角半径值 android:bottomRightRadius左下角半径值
padding
Description: Padding
Attributes:
android:left 左内边距 android:right 右内边距 android:top 上内边距 android:bottom 下内边距:
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