Change height of Preference items

Question

I have a PreferenceFragment subclass. I want each one of its items (Preferences and SwitchPreferences) to have a height of 120dp. How to do that?

Here is the related code:

public class SettingsFragment extends PreferenceFragment {
        public SettingsFragment() {}
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.main);         
        }
}

and

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <SwitchPreference android:key="app_main_switch"
                      android:title="@string/app_name"
                      android:defaultValue="true"/>
    <Preference android:title="@string/events_lowercase"
                android:dependency="app_main_switch">
        <intent android:targetPackage="hu.ppke.itk.marma.android.bead" 
                android:targetClass="hu.ppke.itk.marma.android.bead.EventList"/>
    </Preference>
    <Preference android:title="@string/filters_lowercase"
                android:dependency="app_main_switch">
        <intent android:targetPackage="hu.ppke.itk.marma.android.bead" 
                android:targetClass="hu.ppke.itk.marma.android.bead.FilterList"/>
    </Preference>
    <SwitchPreference android:dependency="app_main_switch"
                      android:key="learn_switch"
                      android:defaultValue="false"
                      android:title="@string/learning"/>
</PreferenceScreen>

Here is how it looks like now:

So I want all four items of the list to have a height of 120dp. As you can see I'm not the one creating the ListView, it's created internally. I tried to retrieve it with

findViewById(android.R.id.list)

but iterating over its elements gives Preference objects which do not allow me to set the height.

Answer 1

Just do it this way:

<!-- Application theme -->
<style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
    <!-- Min item height -->
    <item name="android:listPreferredItemHeight">10dp</item>
</style>

another styling attributes that can be overridden can be found here preference item layout

Answer 2

Try creating a custom Preference class (you may have to do it for every type of Preference you are going to use/want height to be 120DP)

public class SwitchPref extends SwitchPreference {

Context context;

public Pref(Context context) {
    super(context);

    this.context = context;
}

@Override
protected View onCreateView(ViewGroup parent) {

    LinearLayout layout = new LinearLayout(getContext());

    LinearLayout.LayoutParams params1 = new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.MATCH_PARENT, dpToPx(120));

    layout.setLayoutParams(params1);

       //if this returns just the linearlayout, you will have to add your own switch
       // or reference to a layout.xml resource

    return super.onCreateView(layout);

}

public int dpToPx(int dp) {
    int valueInDp = (int) TypedValue.applyDimension(
            TypedValue.COMPLEX_UNIT_DIP, dp, context.getResources()
                    .getDisplayMetrics());
    return valueInDp;
}

}

Then, in your preference.xml:

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

    <!--use your custom SwitchPrefence class-->
    <my.package.name.SwitchPref android:key="app_main_switch"
                  android:title="@string/app_name"
                  android:defaultValue="true"/>
    <Preference android:title="@string/events_lowercase"
            android:dependency="app_main_switch">
        <intent android:targetPackage="hu.ppke.itk.marma.android.bead" 
            android:targetClass="hu.ppke.itk.marma.android.bead.EventList"/>
    </Preference>
    <Preference android:title="@string/filters_lowercase"
            android:dependency="app_main_switch">
        <intent android:targetPackage="hu.ppke.itk.marma.android.bead" 
            android:targetClass="hu.ppke.itk.marma.android.bead.FilterList"/>
    </Preference>
    <my.package.name.SwitchPref android:dependency="app_main_switch"
                  android:key="learn_switch"
                  android:defaultValue="false"
                  android:title="@string/learning"/>
</PreferenceScreen>

Hope this helps, happy coding!