自定义进度绘图不适用于Android Lollipop（API 21）设备

Question

我有一个进度可绘制的，在运行AndroidLollipop的设备上无法正常工作。

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
  <item>
    <shape android:shape="oval">
      <solid android:color="@color/colorTranslucentBlack"/>
    </shape>
  </item>
  <item android:id="@android:id/progress">
    <rotate
        android:fromDegrees="270"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toDegrees="270">
      <shape
          android:innerRadiusRatio="2.5"
          android:shape="ring"
          android:thicknessRatio="25.0">
        <gradient
            android:centerColor="@android:color/holo_red_dark"
            android:endColor="@android:color/holo_red_dark"
            android:startColor="@android:color/holo_red_dark"
            android:type="sweep"/>
      </shape>
    </rotate>
  </item>
  <item android:id="@android:id/secondaryProgress">
    <rotate
        android:fromDegrees="270"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toDegrees="270">
      <shape
          android:innerRadiusRatio="2.5"
          android:shape="ring"
          android:thicknessRatio="25.0">
        <gradient
            android:centerColor="@android:color/holo_red_dark"
            android:endColor="@android:color/holo_red_dark"
            android:startColor="@android:color/holo_red_dark"
            android:type="sweep"/>
      </shape>
    </rotate>
  </item>

</layer-list>

<ProgressBar
      android:id="@+id/circle_progress"
      style="?android:attr/progressBarStyleHorizontal"
      android:layout_width="70dp"
      android:layout_height="70dp"
      android:gravity="center"
      android:progress="65"
      android:indeterminate="false"
      android:progressDrawable="@drawable/circle_percentage_drawable"
      />

在运行Android M、KitKat和Jellybean的设备上，绘制为65%的圆圈的渲染显示。然而，如果相同的代码在Android Lollipop（API 21）上运行，圆圈显示为100%。

完整的源代码可在这里获得：https://github.com/slashrootv200/CircleProgressPercentage

Answer 1

在您的循环进度条xml中添加android： useLevel=true"

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

    <shape android:shape="oval"
           android:useLevel="true">
      <solid android:color="@color/colorTranslucentBlack"/>
    </shape>

  </item>

  <item android:id="@android:id/progress">

    <rotate
        android:fromDegrees="270"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toDegrees="270">
      <shape
          android:innerRadiusRatio="2.5"
          android:shape="ring"
          android:thicknessRatio="25.0"
          android:useLevel="true">
        <gradient
            android:centerColor="@android:color/holo_red_dark"
            android:endColor="@android:color/holo_red_dark"
            android:startColor="@android:color/holo_red_dark"
            android:type="sweep"/>
      </shape>
    </rotate>

  </item>

  <item android:id="@android:id/secondaryProgress">

    <rotate
        android:fromDegrees="270"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toDegrees="270">
      <shape
          android:innerRadiusRatio="2.5"
          android:shape="ring"
          android:thicknessRatio="25.0"
          android:useLevel="true">
        <gradient
            android:centerColor="@android:color/holo_red_dark"
            android:endColor="@android:color/holo_red_dark"
            android:startColor="@android:color/holo_red_dark"
            android:type="sweep"/>
      </shape>
    </rotate>

  </item>

</layer-list>