java 回调与枚举

package miui.maml.elements;import android.util.Log;import miui.maml.ScreenElementRoot;import org.w3c.dom.Element;public class ScreenElementFactory {    public interface FactoryCallback {        public ScreenElement onCreateInstance(Element ele, ScreenElementRoot root);    }    private FactoryCallback mFactoryCallback;    public void setCallback(FactoryCallback factoryCallback) {        mFactoryCallback = factoryCallback;    }    public FactoryCallback getCallback() {        return mFactoryCallback;    }    public ScreenElement createInstance(Element ele, ScreenElementRoot root) {        String tag = ele.getTagName();        try {            if (tag.equalsIgnoreCase(ImageScreenElement.TAG_NAME))                return new ImageScreenElement(ele, root);            else if (tag.equalsIgnoreCase(TimepanelScreenElement.TAG_NAME))                return new TimepanelScreenElement(ele, root);                      else if (mFactoryCallback != null)                return mFactoryCallback.onCreateInstance(ele, root);        } catch (IllegalArgumentException e) {            e.printStackTrace();            Log.w("ScreenElementFactory", "fail to create element." + e);        }        return null;    }}

/** * 这个类是可以通过工厂方法进行重构的 * 每一个检测项是一个类，比如 AirModeCheckItem , WifiIsConnectCheckItem,.......他们实现共同的inferface， * 这个inferface包含itemName等变量，还有checkItem，fixItem等方法 * 有一个CheckItemFactory管理他们 */public enum NetworkDiagoneItem {    APN_ISSUE("checkAPN","APN扫描...", "建议重置APN",false, "重置APN","fixAPN"),    SIM_STATE_ISSUE("checkSimState","SIM卡状态扫描...", "检查是否禁用了sim卡",false, "去检查","fixAPN"),    SIGNAL_STRENGTH_ISSUE("checkSignalStrength","信号强度扫描...", "当前环境信号较差",false, "确定","fixSignalStrength"),    WIFI_NOT_CONNECT("checkWlanConnected","wifi接入点扫描...","去连接wifi",false,"请连接一个wifi","fixWlanConnected"),    WIFI_ROUTE_TO_INTERNET("checkRouteToInternet","路由器连接外网扫描...","去检测路由器设置",false,"去检测路由器设置","fixRouteToInternet"),    WIFI_DNS_ISSUE("checkWlanDNSAvailable","ADSL DNS 扫描...","WIFI DNS",false,"修复","fixAPN"),    WIFI_GATEWAY_ISSUE("checkRouteGetwayAvailable","Wifi网关扫描...", "建议检查路由器设置",false, "网关不能访问","fixRouteGetwayAvailable"),    USB_SHARENET_ISSUE("checkUsbSharenetRoute","USB共享上网扫描...", "建议检查路由器设置",false, "网关不能访问","fixUsbSharenetRoute");       public static List<NetworkDiagoneItem> getAllUsbShareItem() {        List<NetworkDiagoneItem> usbshareItems = new ArrayList<NetworkDiagoneItem>();        usbshareItems.add(USB_SHARENET_ISSUE);        return usbshareItems;    }    private String itemCheckMethod;    private String itemName;    private String itemSummary;    private boolean isOk;    private String itemSolution;    private String solutionMethod;    public static int CurrentSignalStrength = 0;    private NetworkDiagoneItem(String itemCheckMethod,String itemname,String itemSummary, boolean isOk, String itemSolution,String solutionMethod) {        //mContext = context;        this.itemCheckMethod = itemCheckMethod;        this.itemName = itemname;        this.itemSummary = itemSummary;        this.isOk = isOk;        this.itemSolution = itemSolution;        this.solutionMethod = solutionMethod;    }