[android] Custom seekbar (thumb size, color and background)

android:minHeight android:maxHeight is important for that.

<SeekBar
    android:id="@+id/pb"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:maxHeight="2dp"
    android:minHeight="2dp"
    android:progressDrawable="@drawable/seekbar_bg"
    android:thumb="@drawable/seekbar_thumb"
    android:max="100"
    android:progress="50"/>

seekbar_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape>
            <corners android:radius="3dp" />
            <solid android:color="#ECF0F1" />
        </shape>
    </item>
    <item android:id="@android:id/secondaryProgress">
        <clip>
            <shape>
                <corners android:radius="3dp" />
                <solid android:color="#C6CACE" />
            </shape>
        </clip>
    </item>
    <item android:id="@android:id/progress">
        <clip>
            <shape>
                <corners android:radius="3dp" />
                <solid android:color="#16BC5C" />
            </shape>
        </clip>
    </item>
</layer-list>

seekbar_thumb.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
    <solid android:color="#16BC5C" />
    <stroke
        android:width="1dp"
        android:color="#16BC5C" />
    <size
        android:height="20dp"
        android:width="20dp" />
</shape>