使用自定义图层列表可绘制填充进度条内部

Question

我想在没有任何外部库的情况下填充圆形进度条的内部。我已经创建了一个自定义的圆形进度来处理背景/进度/secondaryProgress，但现在我想用椭圆形填充环的内部。

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/backgroundCenter">
        <shape android:shape="oval">
            <solid android:color="@color/orange_dark" />
        </shape>
    </item>

    <item android:id="@android:id/background">
        <!--Background progress-->
        <shape
            android:innerRadiusRatio="3"
            android:shape="ring"
            android:thicknessRatio="15"
            android:useLevel="false">
            <solid android:color="@color/light_grey" />
        </shape>
    </item>

    <item android:id="@android:id/secondaryProgress">
        <shape
            android:innerRadiusRatio="3"
            android:shape="ring"
            android:thicknessRatio="15"
            android:useLevel="true">

            <gradient
                android:centerColor="#999999"
                android:endColor="#999999"
                android:startColor="#999999"
                android:type="sweep" />
        </shape>
    </item>

    <item android:id="@android:id/progress">
        <rotate
            android:fromDegrees="270"
            android:pivotX="50%"
            android:pivotY="50%"
            android:toDegrees="270">

            <shape
                android:innerRadiusRatio="3"
                android:shape="ring"
                android:thicknessRatio="15"
                android:useLevel="true">

                <rotate
                    android:fromDegrees="0"
                    android:pivotX="50%"
                    android:pivotY="50%"
                    android:toDegrees="360" />

                <solid android:color="@color/cyan_light" />

            </shape>
        </rotate>
    </item>
</layer-list>

布局：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <ProgressBar
        android:id="@+id/statusProgressBar"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:backgroundTint="#CCC"
        android:max="100"
        android:progress="50"
        android:progressDrawable="@drawable/circular_progress"
        android:progressTint="@color/red"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

但结果是（卵圆比圆环大）：

我无法添加任何白色笔触来隐藏椭圆，因为我需要在环周围透明。

Answer 1

如果有人有同样的问题，我会解决这个问题，我玩比率来在椭圆的边界上制作环：

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
    android:paddingBottom="20dp"
    android:paddingEnd="20dp"
    android:paddingStart="20dp"
    android:paddingTop="20dp">

    <item
        android:id="@+id/backgroundCenter">
        <shape android:shape="oval">
            <solid android:color="@color/orange_dark" />
        </shape>
    </item>

    <item android:id="@android:id/background">
        <!--Background-->
        <shape
            android:innerRadiusRatio="2.31"
            android:shape="ring"
            android:thicknessRatio="15"
            android:useLevel="false">
            <solid android:color="#CCC" />
        </shape>
    </item>


    <item android:id="@android:id/secondaryProgress">
        <shape
            android:innerRadiusRatio="2.31"
            android:shape="ring"
            android:thicknessRatio="15"
            android:useLevel="true">

            <gradient
                android:centerColor="#999999"
                android:endColor="#999999"
                android:startColor="#999999"
                android:type="sweep" />
        </shape>
    </item>

    <item android:id="@android:id/progress">
        <rotate
            android:fromDegrees="270"
            android:pivotX="50%"
            android:pivotY="50%"
            android:toDegrees="270">

            <shape
                android:innerRadiusRatio="2.31"
                android:shape="ring"
                android:thicknessRatio="15"
                android:useLevel="true">

                <rotate
                    android:fromDegrees="0"
                    android:pivotX="50%"
                    android:pivotY="50%"
                    android:toDegrees="360" />

                <solid android:color="#000" />

            </shape>
        </rotate>
    </item>
</layer-list>