1、shape:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<!--圆角-->
<corners
android:radius="5dp"
android:topLeftRadius="30dp"
android:bottomRightRadius="30dp"/>
<!--填充颜色-->
<solid android:color="#000"/>
<!--边框-->
<stroke
android:color="#808080"
android:width="2dp"/>
<!--渐变-->
<gradient
android:startColor="#f52"
android:centerColor="#f92"
android:endColor="#fe2"
android:angle="180"/>
</shape>
The gradient color offsets the fill color, so solid can be removed.
2. Regarding the angle parameter of gradient:
0 is from left to right
90 is from bottom to top
180 is from right to left
270 is from top to bottom
360==0
3. There is also a type parameter:
linear linear gradient (default)
radial circular gradient
sweep fan gradient
Gradient generally gives a start color and an end color, and then specifies the direction.
4. Semi-rounded corners on both sides:
<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners android:radius="999dp"/>
<stroke
android:width="1dp"
android:color="@color/colorPrimary"/>
<padding
android:bottom="10dp"
android:left="20dp"
android:right="20dp"
android:top="10dp"/>
</shape>