ProgressBar

 <ProgressBar
                style="?android:attr/progressBarStyleHorizontal"
                android:id="@+id/mProgress"
                android:layout_width="match_parent"
                android:progressDrawable="@drawable/bluetooth_progress_style"
                android:max="100"
                android:layout_height="10dp"/>

自定义横向样式

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <!-- 背景 -->
    <item android:id="@android:id/background">
        <shape>
            <corners android:radius="5dip" />
            <gradient
                android:angle="270"
                android:centerY="0.75"
                android:endColor="@color/light_white_grey"
                android:startColor="@color/light_white_grey" />
        </shape>
    </item>
    <item android:id="@android:id/progress">
        <clip>
            <shape>
                <corners android:radius="5dip" />
                <gradient
                    android:angle="270"
                    android:centerY="0.75"
                    android:endColor="@color/bluetooth_update_title_color"
                    android:startColor="@color/bluetooth_update_title_color" />
            </shape>
        </clip>
    </item>
</layer-list>

运行结果如下