Preference是Android的控件之一,相对来说我们用的比较少,但在系统应用的Settings设置应用模块中大部分由Preference控件组成。
Preference主要角色是子控件,PreferenceCategory相当于LinearLayout和Relative layout,一般进行Preferenc分类组合,设置不同小标题。PreferenceCategory是所用preference元素的根结点。 preference主要属性:
1.编写xml布局:res/xml/test_preference.xml
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" xmlns:settings="http://schemas.android.com/apk/res/com.android.settings" android:title="@string/display_settings" settings:keywords="@string/keywords_display"> <PreferenceCategory android:key="phone_category" android:title="我的手机"> <Preference android:key="phone" android:summary="关于手机" android:title="小米" /> <Preference android:key="phone_status" android:title="状态信息" /> </PreferenceCategory> <PreferenceCategory android:key="other_category" android:title="其他"> <SwitchPreference android:key="permission" android:summary="位置权限,定位获取位置信息" android:title="权限" /> </PreferenceCategory> <PreferenceScreen android:fragment="com.android.settings.accessibility.ToggleFontSizePreferenceFragment" android:key="font_size" android:title="@string/title_font_size" settings:keywords="@string/keywords_display_font_size" /> </PreferenceScreen>
2.activity进行布局绑定
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.display_settings); }
效果图:
3.动态添加preference控件
PreferenceGroup preferenceScreen = getPreferenceScreen(); PreferenceCategory webCategory = new PreferenceCategory(getPrefContext()); webCategory.setTitle(R.string.web_action_section_title); preferenceScreen.addPreference(webCategory); // toggle to enable / disable Web mWeb = new SwitchPreference(getPrefContext()); mWeb.setTitle(R.string.web_action_enable_title); mWeb.setSummary(R.string.web_action_enable_summary); mWeb.setChecked(Settings.Secure.getInt(getContentResolver(), Settings.Secure.WEB_ACTION_ENABLED, 1) != 0); mWebn.setOnPreferenceChangeListener(this); webCategory.addPreference(mWeb); // list to manage link handling per app PreferenceGroup mDomainAppList = new PreferenceCategory(getPrefContext()); mDomainAppList.setTitle(R.string.domain_url_section_title); preferenceScreen.addPreference(mDomainAppList);
有需要的朋友可以借鉴参考下,希望能够有所帮助,祝大家多多进步,早日升职加薪