Android SeekBar thumb gets clipped/cut off
-
04-10-2019 - |
Pergunta
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 behavior?
Solução
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
.
Outras dicas
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.
For default SeekBar I used these settings and it works fine:
android:paddingLeft="6dp"
android:paddingRight="6dp"
android:thumbOffset="8dp"
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