安卓shape 画各种形状

画半圆 圆心为中点渐变色

<View
    android:id="@+id/gradient_view"
    android:layout_width="834dp"
    android:layout_height="417dp"
    android:layout_gravity="bottom|right"
    android:clickable="false"
    android:background="@drawable/gradient_bg_rot" />

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <!--    <size android:height="417dp" android:width="834dp"/>-->

    <gradient
        android:gradientRadius="417dp"
        android:startColor="@color/title_bar_divider_rot_start"
        android:endColor="@color/title_bar_divider_rot_end"
        android:centerX="0.5"
        android:centerY="1"
        android:type="radial" />

    <corners
        android:topLeftRadius="1000dp"
        android:topRightRadius="1000dp" />
</shape>