xUtils源码阅读（1）- x

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这次阅读xUtils我们从上到下的方式读。

先看看这个这么另类的类x吧。

很简单，就是对整个项目的一个整体功能的总括。

共包括四部分：

1、数据库

2、Http访问

3、图片管理

4、view注入

5、任务管理(以上各项在执行的时候都要包装成一个个的任务执行)

源码：

/** * Created by wyouflf on 15/6/10. * 任务控制中心, http, image, db, view注入等接口的入口. * 需要在在application的onCreate中初始化: x.Ext.init(this); */public final class x {//静态类，其方法都是静态的。    private x() {//防止构造对象    }    public static boolean isDebug() {//是否要debug        return Ext.debug;    }    public static Application app() {//获取当前的Application        if (Ext.app == null) {            try {                // 在IDE进行布局预览时使用                Class<?> renderActionClass = Class.forName("com.android.layoutlib.bridge.impl.RenderAction");                Method method = renderActionClass.getDeclaredMethod("getCurrentContext");                Context context = (Context) method.invoke(null);                Ext.app = new MockApplication(context);            } catch (Throwable ignored) {                throw new RuntimeException("please invoke x.Ext.init(app) on Application#onCreate()"                        + " and register your Application in manifest.");            }        }        return Ext.app;    }    public static TaskController task() {//所使用的任务管理器        return Ext.taskController;    }    public static HttpManager http() {//所使用的http管理器        if (Ext.httpManager == null) {            HttpManagerImpl.registerInstance();        }        return Ext.httpManager;    }    public static ImageManager image() {//所使用的image管理器        if (Ext.imageManager == null) {            ImageManagerImpl.registerInstance();        }        return Ext.imageManager;    }    public static ViewInjector view() {//所使用的view注入器        if (Ext.viewInjector == null) {            ViewInjectorImpl.registerInstance();        }        return Ext.viewInjector;    }    public static DbManager getDb(DbManager.DaoConfig daoConfig) {//数据库管理器        return DbManagerImpl.getInstance(daoConfig);    }    public static class Ext {//内部类，同时也是配置类，各个关键部件的引用管理类        private static boolean debug;        private static Application app;        private static TaskController taskController;        private static HttpManager httpManager;        private static ImageManager imageManager;        private static ViewInjector viewInjector;        private Ext() {        }        static {            TaskControllerImpl.registerInstance();            // 默认信任所有https域名            HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {                @Override                public boolean verify(String hostname, SSLSession session) {                    return true;                }            });        }        public static void init(Application app) {            if (Ext.app == null) {                Ext.app = app;            }        }        public static void setDebug(boolean debug) {            Ext.debug = debug;        }        public static void setTaskController(TaskController taskController) {            if (Ext.taskController == null) {                Ext.taskController = taskController;            }        }        public static void setHttpManager(HttpManager httpManager) {            Ext.httpManager = httpManager;        }        public static void setImageManager(ImageManager imageManager) {            Ext.imageManager = imageManager;        }        public static void setViewInjector(ViewInjector viewInjector) {            Ext.viewInjector = viewInjector;        }    }    private static class MockApplication extends Application {        public MockApplication(Context baseContext) {            this.attachBaseContext(baseContext);//绑定到特定的baseContext        }    }}

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