如何向PreferenceScreen条目添加图标

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <PreferenceCategory
        android:title="Category 1">
        <Preference
            android:key="pref1"
            android:title="Preference 1"
            android:summary="This is the summary for Preference 1"
            android:icon="@drawable/icon1"/>
        <Preference
            android:key="pref2"
            android:title="Preference 2"
            android:summary="This is the summary for Preference 2"
            android:icon="@drawable/icon2"/>
    </PreferenceCategory>
    <PreferenceCategory
        android:title="Category 2">
        <Preference
            android:key="pref3"
            android:title="Preference 3"
            android:summary="This is the summary for Preference 3"
            android:icon="@drawable/icon3"/>
        <Preference
            android:key="pref4"
            android:title="Preference 4"
            android:summary="This is the summary for Preference 4"
            android:icon="@drawable/icon4"/>
    </PreferenceCategory>
</PreferenceScreen>

public class SettingsFragment extends PreferenceFragmentCompat {
    @Override
    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
        addPreferencesFromResource(R.xml.preferences);
    }
}