层列表背景不适用于Android棒棒糖上的水平进度条（5.1.1/API 22）

这是我的进度条的布局XML:

<ProgressBar
    android:id="@+id/myProgressBar"

    style="@style/Widget.AppCompat.ProgressBar.Horizontal"
    android:minHeight="@dimen/my_progress_bar_height"
    android:maxHeight="@dimen/my_progress_bar_height"
    android:progressDrawable="@drawable/my_progress_bar"
    android:indeterminate="false"

    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_toLeftOf="@id/imageViewSend"
    android:layout_toStartOf="@id/imageViewSend"
    android:max="10"
    android:progress="0"
    android:layout_centerVertical="true"/>

<item name="android:background">@drawable/my_progress_bar_bg</item>
<item name="android:progressDrawable">@drawable/my_progress_bar_progress</item>

<?xml version="1.0" encoding="utf-8"?>
<layer-list
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:left="-2dp"
        android:right="-2dp">
        <shape android:shape="rectangle">
            <solid
                android:color="@color/transparent" />
            <stroke
                android:color="@color/progress_bg"
                android:width="2dp" />
        </shape>
    </item>
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<layer-list
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@android:id/progress">
        <clip>
            <layer-list>
                <item
                    android:left="-2dp"
                    android:right="-2dp">
                    <shape android:shape="rectangle">
                        <solid
                            android:color="@color/transparent" />
                        <stroke
                            android:color="@color/progress_progress"
                            android:width="2dp" />
                    </shape>
                </item>
            </layer-list>
        </clip>
    </item>
</layer-list>

在安卓牛轧糖（7.0/API 24）上，ProgressBar看起来与预期的一样：

但在Android棒棒糖（5.1.1/API 22）上，它看起来是这样的：

…也就是说，我为线条指定的宽度似乎没有得到尊重

为什么它在Android棒棒糖设备上显示不同？如何让它看起来像安卓牛轧糖设备一样

---

（对一个类似的问题没有帮助。）

我找到了一个解决方案，但它并不理想，因为它意味着有单独的背景和进度可提取资源

现在我的进度条有两个属性：

<ProgressBar
    android:id="@+id/myProgressBar"

    style="@style/Widget.AppCompat.ProgressBar.Horizontal"
    android:minHeight="@dimen/my_progress_bar_height"
    android:maxHeight="@dimen/my_progress_bar_height"
    android:progressDrawable="@drawable/my_progress_bar"
    android:indeterminate="false"

    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_toLeftOf="@id/imageViewSend"
    android:layout_toStartOf="@id/imageViewSend"
    android:max="10"
    android:progress="0"
    android:layout_centerVertical="true"/>

<item name="android:background">@drawable/my_progress_bar_bg</item>
<item name="android:progressDrawable">@drawable/my_progress_bar_progress</item>

<?xml version="1.0" encoding="utf-8"?>
<layer-list
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:left="-2dp"
        android:right="-2dp">
        <shape android:shape="rectangle">
            <solid
                android:color="@color/transparent" />
            <stroke
                android:color="@color/progress_bg"
                android:width="2dp" />
        </shape>
    </item>
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<layer-list
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@android:id/progress">
        <clip>
            <layer-list>
                <item
                    android:left="-2dp"
                    android:right="-2dp">
                    <shape android:shape="rectangle">
                        <solid
                            android:color="@color/transparent" />
                        <stroke
                            android:color="@color/progress_progress"
                            android:width="2dp" />
                    </shape>
                </item>
            </layer-list>
        </clip>
    </item>
</layer-list>

@drawable/my\u progress\u bar\u bg
@可绘制/我的进度条进度

我的进度条\u bg.xml：

<ProgressBar
    android:id="@+id/myProgressBar"

    style="@style/Widget.AppCompat.ProgressBar.Horizontal"
    android:minHeight="@dimen/my_progress_bar_height"
    android:maxHeight="@dimen/my_progress_bar_height"
    android:progressDrawable="@drawable/my_progress_bar"
    android:indeterminate="false"

    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_toLeftOf="@id/imageViewSend"
    android:layout_toStartOf="@id/imageViewSend"
    android:max="10"
    android:progress="0"
    android:layout_centerVertical="true"/>

<item name="android:background">@drawable/my_progress_bar_bg</item>
<item name="android:progressDrawable">@drawable/my_progress_bar_progress</item>

<?xml version="1.0" encoding="utf-8"?>
<layer-list
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:left="-2dp"
        android:right="-2dp">
        <shape android:shape="rectangle">
            <solid
                android:color="@color/transparent" />
            <stroke
                android:color="@color/progress_bg"
                android:width="2dp" />
        </shape>
    </item>
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<layer-list
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@android:id/progress">
        <clip>
            <layer-list>
                <item
                    android:left="-2dp"
                    android:right="-2dp">
                    <shape android:shape="rectangle">
                        <solid
                            android:color="@color/transparent" />
                        <stroke
                            android:color="@color/progress_progress"
                            android:width="2dp" />
                    </shape>
                </item>
            </layer-list>
        </clip>
    </item>
</layer-list>

我的进度条进度.xml：

<ProgressBar
    android:id="@+id/myProgressBar"

    style="@style/Widget.AppCompat.ProgressBar.Horizontal"
    android:minHeight="@dimen/my_progress_bar_height"
    android:maxHeight="@dimen/my_progress_bar_height"
    android:progressDrawable="@drawable/my_progress_bar"
    android:indeterminate="false"

    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_toLeftOf="@id/imageViewSend"
    android:layout_toStartOf="@id/imageViewSend"
    android:max="10"
    android:progress="0"
    android:layout_centerVertical="true"/>

<item name="android:background">@drawable/my_progress_bar_bg</item>
<item name="android:progressDrawable">@drawable/my_progress_bar_progress</item>

<?xml version="1.0" encoding="utf-8"?>
<layer-list
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:left="-2dp"
        android:right="-2dp">
        <shape android:shape="rectangle">
            <solid
                android:color="@color/transparent" />
            <stroke
                android:color="@color/progress_bg"
                android:width="2dp" />
        </shape>
    </item>
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<layer-list
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@android:id/progress">
        <clip>
            <layer-list>
                <item
                    android:left="-2dp"
                    android:right="-2dp">
                    <shape android:shape="rectangle">
                        <solid
                            android:color="@color/transparent" />
                        <stroke
                            android:color="@color/progress_progress"
                            android:width="2dp" />
                    </shape>
                </item>
            </layer-list>
        </clip>
    </item>
</layer-list>