【android】shape的使用

res/drawable/gradient_box.xml

<?xml version="1.0" encoding="utf-8"?>
<shapexmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:startColor="#FFFF0000"
android:endColor="#80FF00FF"
android:angle="45"/>
<paddingandroid:left="7dp"
android:top="7dp"
android:right="7dp"
android:bottom="7dp"/>
<cornersandroid:radius="8dp"/>
</shape>

<TextView
android:background="@drawable/gradient_box"
android:layout_height="wrap_content"
android:layout_width="wrap_content"/>

Resources res =getResources();
Drawable shape = res.getDrawable(R.drawable.gradient_box);

TextView tv =(TextView)findViewByID(R.id.textview);
tv.setBackground(shape);

<?xml version="1.0" encoding="utf-8"?>
<shape android:shape="rectangle" xmlns:android="http://schemas.android.com/apk/res/android">
<!-- 渐变 -->
<!-- 详细内容 http://developer.android.com/guide/topics/resources/drawable-resource.html#Shape -->
<gradient
android:startColor="#0000ff"
android:endColor="#00bfff"
android:angle="45"
android:centerX="0.5"/>
<!-- 圆角 -->
<corners
android:radius="8dp"/>
<!-- 外边间距 -->
<padding android:left="7dp"
android:top="7dp"
android:right="7dp"
android:bottom="7dp" />
<!-- 描边 -->
<stroke

android:width="2dp"
android:color="#dcdcdc"
android:dashWidth="5dp"
android:dashGap="0dp" />
<!-- dashgap 表示间隔 有了间隔就成了虚线 -->

</shape>