如何移除Material Slider默认的左右16单位边距？

Hey there! I’ve run into this exact head-scratcher with Material Slider before—those hidden 16dp margins are easy to miss because they’re not hardcoded directly in the view’s source code. Here’s how you can get rid of them:

• Quick One-off Fix: Override Padding Directly in Layout
  If you only need to adjust a single Slider instance, just set the padding values to 0 right in your XML layout. This bypasses the default style’s settings immediately:

  <com.google.android.material.slider.Slider
      android:id="@+id/my_slider"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:paddingStart="0dp"
      android:paddingEnd="0dp"
      android:paddingLeft="0dp"
      android:paddingRight="0dp" />
  

• Reusable Solution: Create a Custom Style
  For multiple Sliders across your app, define a custom style in styles.xml that overrides the default padding. This keeps your code consistent:

  <style name="NoMarginSlider" parent="Widget.MaterialComponents.Slider">
      <item name="android:paddingStart">0dp</item>
      <item name="android:paddingEnd">0dp</item>
      <item name="android:paddingLeft">0dp</item>
      <item name="android:paddingRight">0dp</item>
  </style>
  

  Then apply it to any Slider like this:

  <com.google.android.material.slider.Slider
      android:id="@+id/my_slider"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      style="@style/NoMarginSlider" />
  

• Bonus: Adjust Track Padding (If Needed)
  If the slider thumb still doesn’t reach the very edges after removing the view padding, you can tweak the track’s internal padding too. Add this line to your custom style or layout:

  <item name="trackPadding">0dp</item>
  

  This controls the gap between the track’s ends and the slider’s bounds, separate from the view’s outer padding.

Just a quick note: Those default 16dp margins are part of Material Design’s guidelines, so double-check that removing them aligns with your app’s design system first!

内容的提问来源于stack exchange，提问作者Joe Robert