Android: How to adjust Margin/Padding in Preference?

Question

Before I asked to remove the padding of the PreferenceActivity/PreferenceFragment:

Android: How to maximize PreferenceFragment width (or get rid of margin)?

Answer 1

For anyone facing this issue and don't want to go through custom layout. I'd like to note that adding:

android:icon="@null"

solved my problem with the left-side empty space.

<PreferenceScreen android:icon="@null" android:title="Your title" android:summary="Your summary" />

Answer 2

As of 16 Feb 2020, This space is meant for icon. To get rid of this space use:

JAVA

    preference.setIconSpaceReserved(false);

XML

<androidx.preference.PreferenceScreen
xmlns:app="http://schemas.android.com/apk/res-auto">

<Preference
    ...
    app:iconSpaceReserved="true/false"
    .../>

</androidx.preference.PreferenceScreen>

True adds the padding. False removes it.

PS: Dependency used

implementation 'androidx.preference:preference:1.1.0'

Answer 3

If you are creating preferences dynamically pass ContextThemeWrapper as a parameter to the new Preference

TypedValue themeTypedValue = new TypedValue();
getActivity().getTheme().resolveAttribute(R.attr.preferenceTheme, themeTypedValue, true);
ContextThemeWrapper contextThemeWrapper = new ContextThemeWrapper(getActivity(), themeTypedValue.resourceId);
Preference preference = new Preference(contextThemeWrapper);

I have found it in this article: Dynamically creating Preference Screens on Android

Answer 4

You could customize you checkbox like this: MyPreference.xml

<CheckBoxPreference android:key="testcheckbox" 
    android:title="Checkbox Title" 
    android:summary="Checkbox Summary..." 
    android:layout="@layout/custom_checkbox_preference_layout">
</CheckBoxPreference>

and custom_checkbox_preference_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:minHeight="?android:attr/listPreferredItemHeight"
    android:gravity="center_vertical"
    android:paddingLeft="16dip"
    android:paddingRight="?android:attr/scrollbarSize">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:minWidth="0dp"
        android:gravity="center"
        android:orientation="horizontal">
        <ImageView
            android:id="@+android:id/icon"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            />
    </LinearLayout>

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="6dip"
        android:layout_marginTop="6dip"
        android:layout_marginBottom="6dip"
        android:layout_weight="1">

        <TextView android:id="@+android:id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:singleLine="true"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:ellipsize="marquee"
            android:fadingEdge="horizontal" />

        <TextView android:id="@+android:id/summary"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@android:id/title"
            android:layout_alignLeft="@android:id/title"
            android:textAppearance="?android:attr/textAppearanceSmall"
            android:textColor="?android:attr/textColorSecondary"
            android:maxLines="4" />

    </RelativeLayout>

    <!-- Preference should place its actual preference widget here. -->
    <LinearLayout android:id="@+android:id/widget_frame"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical" />

</LinearLayout>

the point is android:minWidth="0dp".

Answer 5

The custom_checkbox_preference_layout.xml described by user1482130 work also without modifications for other types of preferences such as listpreferences ! Very usefull

android:layout="@layout/custom_checkbox_preference_layout">