Android自定义preference

1.自定义preference
public class MyPreference extends Preference {


    public MyPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        setWidgetLayoutResource(R.layout.arrow_next);
    }

    public MyPreference(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        setWidgetLayoutResource(R.layout.arrow_next);
    }

    public MyPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        setWidgetLayoutResource(R.layout.arrow_next);
    }

    public MyPreference(Context context) {
        super(context);
        setWidgetLayoutResource(R.layout.arrow_next);
    }

    @Override
    public void onBindViewHolder(PreferenceViewHolder holder) {
        super.onBindViewHolder(holder);
        initPreferenceStyle(holder);
    }

   public void initPreferenceStyle(PreferenceViewHolder holder) {
    holder.itemView.setPadding(25, 8, 25, 8);
    TextView txtTitle = (TextView) holder.findViewById(android.R.id.title);
    txtTitle.setTextSize(20);
    }

}
2.加入preference.xml
<PreferenceScreen>

    <com.example.preference.MyListPreference
        app:allowDividerAbove="true"
        app:defaultValue="@string/value_language_cn"
        app:entries="@array/entries_language"
        app:entryValues="@array/entry_values_language"
        app:icon="@drawable/ic_setting_language"
        app:key="language"
        app:summary="@string/language_cn"
        app:title="@string/settings_language" />

</PreferenceScreen>
3.加载prefrence

public class SettingsActivity extends BaseActivity {

    @Override
    public void onCreate() {
        getSupportFragmentManager()
                .beginTransaction()
                .replace(R.id.settings_container, new SettingsFragment())
                .commit();
    }
}

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