Android SeekBar thumb gets clipped/cut off

Question

When using a custom thumb drawable with a SeekBar view, the thumb drawable is clipped at the left and right edges of the view.

How can I fix this behavi

Answer 1

I ran into this issue myself, and I believe the "correct" decision would be to modify android:thumbOffset as the default style for a SeekBar sets it to 8px.

Answer 2

For default SeekBar I used these settings and it works fine:

android:paddingLeft="6dp"
android:paddingRight="6dp"

android:thumbOffset="8dp"

Answer 3

You should be able to fix this by setting paddingLeft and paddingRight on your SeekBar to half the thumb width (remember to use density-independent units). You can also control the space allowed at the edges for a seek bar's thumb by calling setThumbOffset.

Answer 4

<androidx.appcompat.widget.AppCompatSeekBar
        android:id="@+id/progress_loan_period"
        android:layout_width="@dimen/dp_0"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/dp_15"
        android:progressDrawable="@drawable/seek_bar"
        android:thumb="@drawable/ic_slider"
        android:paddingStart="@dimen/dp_0"
        android:paddingEnd="@dimen/dp_0"
        android:thumbOffset="-0dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@id/label_loan_period" />

This gets the job done

Answer 5

Just for clarification.

On some places I have seen

 android:thumbOffset="8dp"

and some

android:thumbOffset="8px"

so I looked at the source code. this is the original style

<style name="Widget.SeekBar">
        <item name="android:indeterminateOnly">false</item>
        <item name="android:progressDrawable">@android:drawable/progress_horizontal</item>
        <item name="android:indeterminateDrawable">@android:drawable/progress_horizontal</item>
        <item name="android:minHeight">20dip</item>
        <item name="android:maxHeight">20dip</item>
        <item name="android:thumb">@android:drawable/seek_thumb</item>
        <item name="android:thumbOffset">8dip</item>
        <item name="android:focusable">true</item>
    </style>

from

https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/core/res/res/values/styles.xml