Android - How to change default SeekBar thickness?

Question

I have this SeekBar:

        <SeekBar
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="26dp"
        android:id="@+id/seekbar"
        android:visibility="gone"
        android:maxHeight="3dp"/>

I have tried to change this SeekBar thickness using maxHeight. But nothing changed. It looks like this:

I want to change this SeekBar's thickness to 3dp and make look like this:

So my question is it possible to change SeekBar thickness somehow? If yes, how?

Answer 1

You have to change progressDrawable and thumb of SeekBar to adjust it's thickness :

<SeekBar
    android:id="@+id/seekBar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/indSeekBar"
    android:layout_marginTop="48dp"
    android:progressDrawable="@drawable/seek_bar"
    android:thumb="@drawable/seek_thumb"
    />

Add in drawable folder seek_bar.xml :

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape
            android:shape="line">
            <stroke
                android:color="@color/seek_bar_background"
                android:width="@dimen/seek_bar_thickness"/>
        </shape>
    </item>
    <item android:id="@android:id/secondaryProgress">
        <clip>
            <shape
                android:shape="line">
                <stroke
                    android:color="@color/seek_bar_secondary_progress"
                    android:width="@dimen/seek_bar_thickness"/>
            </shape>
        </clip>
    </item>

    <item android:id="@android:id/progress">
        <clip>
            <shape
                android:shape="line">
                <stroke
                    android:color="@color/seek_bar_progress"
                    android:width="@dimen/seek_bar_thickness"/>
            </shape>
        </clip>
    </item>

</layer-list>

seek_thumb.xml :

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
    <size
        android:height="@dimen/seek_bar_thumb_size"
        android:width="@dimen/seek_bar_thumb_size"
        />
    <solid android:color="@color/seek_bar_progress"/>
</shape>

Add to dimension resources (change this to adjust thickness) :

<dimen name="seek_bar_thickness">4dp</dimen>
<dimen name="seek_bar_thumb_size">20dp</dimen>

Add color resources :

<color name="seek_bar_background">#ababab</color>
<color name="seek_bar_progress">#ffb600</color>
<color name="seek_bar_secondary_progress">#3399CC</color>