ARouter路由解析

目录介绍

  • 01.原生跳转实现
  • 02.实现组件跳转方式
    • 2.1 传统跳转方式
    • 2.2 为何需要路由
  • 03.ARouter配置与优势
  • 04.跨进程组件通信
    • 4.1 URLScheme
    • 4.2 AIDL
    • 4.3 BroadcastReceiver
    • 4.4 路由通信注意要点
  • 05.ARouter的结构
  • 06.ARouter的工作流程
    • 6.1 初始化流程
    • 6.2 跳转页面流程
  • 07.ARouter简单调用api
    • 7.1 最简单调用
    • 7.2 build源码分析
    • 7.3 navigation分析
  • 08.Postcard信息携带
  • 09.LogisticsCenter
  • 10.DegradeService降级容错服务
  • 11.Interceptor拦截器
  • 12.数据传输和自动注入
  • 13.多dex的支持
  • 14.InstantRun支持
  • 15.生成的编译代码

好消息

  • 博客笔记大汇总【16年3月到至今】,包括Java基础及深入知识点,Android技术博客,Python学习笔记等等,还包括平时开发中遇到的bug汇总,当然也在工作之余收集了大量的面试题,长期更新维护并且修正,持续完善……开源的文件是markdown格式的!同时也开源了生活博客,从12年起,积累共计N篇[近100万字,陆续搬到网上],转载请注明出处,谢谢!
  • 链接地址:https://github.com/yangchong211/YCBlogs
  • 如果觉得好,可以star一下,谢谢!当然也欢迎提出建议或者问题,万事起于忽微,量变引起质变!

注解学习小案例

  • 注解学习小案例,比较系统性学习注解并且应用实践。简单应用了运行期注解,通过注解实现了setContentView功能;简单应用了编译器注解,通过注解实现了防暴力点击的功能,同时支持设置时间间隔;使用注解替代枚举;使用注解一步步搭建简单路由案例。结合相应的博客,在来一些小案例,从此应该对注解有更加深入的理解……
  • 开源项目地址:https://github.com/yangchong211/YCApt

01.原生跳转实现

  • Google提供的原声路由主要是通过intent,可以分成显示和隐式两种。显示的方案会导致类之间的直接依赖问题,耦合严重;隐式intent需要的配置清单中统一声明,首先有个暴露的问题,另外在多模块开发中协作也比较困难。只要调用startActivity后面的环节我们就无法控制了,在出现错误时无能为力。

02.实现组件跳转方式

2.1 传统跳转方式

  • 第一种,通过intent跳转
  • 第二种,通过aidl跳转
  • 第三种,通过scheme协议跳转

2.2 为何需要路由

  • 显示Intent:项目庞大以后,类依赖耦合太大,不适合组件化拆分
  • 隐式Intent:协作困难,调用时候不知道调什么参数
  • 每个注册了Scheme的Activity都可以直接打开,有安全风险
  • AndroidMainfest集中式管理比较臃肿
  • 无法动态修改路由,如果页面出错,无法动态降级
  • 无法动态拦截跳转,譬如未登录的情况下,打开登录页面,登录成功后接着打开刚才想打开的页面
  • H5、Android、iOS地址不一样,不利于统一跳转

03.ARouter配置与优势

3.1 ARouter的优势

  • 如下所示
    • 直接解析URL路由,解析参数并赋值
    • 支持多模块项目
    • 支持InstantRun
    • 允许自定义拦截器
    • ARouter可以提供IoC容器
    • 映射关系自动注册
    • 灵活的降级策略

3.2 至于配置和使用

  • 直接看https://www.jianshu.com/p/fed5d5b95bae

04.跨进程组件通信

4.1 URLScheme【例如:ActivityRouter、ARouter等】

  • 优势有:
    • 基因中自带支持从webview中调用
    • 不用互相注册(不用知道需要调用的app的进程名称等信息)
  • 劣势有:
    • 只能单向地给组件发送信息,适用于启动Activity和发送指令,不适用于获取数据(例如:获取用户组件的当前用户登录信息)
    • 需要有个额外的中转Activity来统一处理URLScheme
    • 如果设备上安装了多个使用相同URLScheme的app,会弹出选择框(多个组件作为app同时安装到设备上时会出现这个问题)
    • 无法进行权限设置,无法进行开关设置,存在安全性风险

4.2 AIDL

  • 优势有:
    • 可以传递Parcelable类型的对象
    • 效率高
    • 可以设置跨app调用的开关
  • 劣势有:
    • 调用组件之前需要提前知道该组件在那个进程,否则无法建立ServiceConnection
    • 组件在作为独立app和作为lib打包到主app时,进程名称不同,维护成本高

4.3 BroadcastReceiver

  • BroadcastReceiver + Service + LocalSocket。该方案是参考cc路由框架!
  • 跨组件间通信实现的同时,应该满足以下条件:
    • 每个app都能给其它app调用
    • app可以设置是否对外提供跨进程组件调用的支持
    • 组件调用的请求发出去之后,能自动探测当前设备上是否有支持此次调用的app
    • 支持超时、取消

4.4 路由通信注意要点

05.ARouter的结构

  • ARouter主要由三部分组成,包括对外提供的api调用模块、注解模块以及编译时通过注解生产相关的类模块。
    • arouter-annotation注解的声明和信息存储类的模块
    • arouter-compiler编译期解析注解信息并生成相应类以便进行注入的模块
    • arouter-api核心调用Api功能的模块
  • annotation模块
    • Route、Interceptor、Autowired都是在开发是需要的注解。
    • ARouter路由解析_第1张图片
      image
  • compiler模块
    • AutoWiredProcessor、InterceptorProcessor、RouteProcessor分别为annotation模块对应的Autowired、Interceptor、Route在项目编译时产生相关的类文件。
  • api模块
    • 主要是ARouter具体实现和对外暴露使用的api。

06.ARouter的工作流程

6.1 初始化流程

  • 初始化代码如下所示
    /**
     * Init, it must be call before used router.
     */
    public static void init(Application application) {
        //如果没有初始化,则
        if (!hasInit) {
            logger = _ARouter.logger;
            _ARouter.logger.info(Consts.TAG, "ARouter init start.");
            
            //做初始化工作
            hasInit = _ARouter.init(application);
    
            if (hasInit) {
                _ARouter.afterInit();
            }
    
            _ARouter.logger.info(Consts.TAG, "ARouter init over.");
        }
    }
    
  • 之后接着看_ARouter.init(application)这行代码,点击去查看
    protected static synchronized boolean init(Application application) {
        //赋值上下文
        mContext = application;
        //初始化LogisticsCenter
        LogisticsCenter.init(mContext, executor);
        logger.info(Consts.TAG, "ARouter init success!");
        hasInit = true;
        mHandler = new Handler(Looper.getMainLooper());
        return true;
    }
    
  • 接下来看看LogisticsCenter里面做了什么
    public class LogisticsCenter {
        /**
         * LogisticsCenter init, load all metas in memory. Demand initialization
         */
        public synchronized static void init(Context context, ThreadPoolExecutor tpe) throws HandlerException {
            mContext = context;
            executor = tpe;
            try {
                long startInit = System.currentTimeMillis();
                Set routerMap;
                //debug或者版本更新的时候每次都重新加载router信息
                // It will rebuild router map every times when debuggable.
                if (ARouter.debuggable() || PackageUtils.isNewVersion(context)) {
                    logger.info(TAG, "Run with debug mode or new install, rebuild router map.");
                    // These class was generate by arouter-compiler.
                    //加载alibaba.android.arouter.routes包下载的类
                    routerMap = ClassUtils.getFileNameByPackageName(mContext, ROUTE_ROOT_PAKCAGE);
                    if (!routerMap.isEmpty()) {
                        context.getSharedPreferences(AROUTER_SP_CACHE_KEY, Context.MODE_PRIVATE).edit().putStringSet(AROUTER_SP_KEY_MAP, routerMap).apply();
                    }
                    PackageUtils.updateVersion(context);    // Save new version name when router map update finish.
                } else {
                    logger.info(TAG, "Load router map from cache.");
                    routerMap = new HashSet<>(context.getSharedPreferences(AROUTER_SP_CACHE_KEY, Context.MODE_PRIVATE).getStringSet(AROUTER_SP_KEY_MAP, new HashSet()));
                }
    
                logger.info(TAG, "Find router map finished, map size = " + routerMap.size() + ", cost " + (System.currentTimeMillis() - startInit) + " ms.");
                startInit = System.currentTimeMillis();
    
                for (String className : routerMap) {
                    if (className.startsWith(ROUTE_ROOT_PAKCAGE + DOT + SDK_NAME + SEPARATOR + SUFFIX_ROOT)) {
                        // This one of root elements, load root. 
                        //导入ARouter$$Root$$app.java,初始化Warehouse.groupsIndex集合
                        ((IRouteRoot) (Class.forName(className).getConstructor().newInstance())).loadInto(Warehouse.groupsIndex);
                    } else if (className.startsWith(ROUTE_ROOT_PAKCAGE + DOT + SDK_NAME + SEPARATOR + SUFFIX_INTERCEPTORS)) {
                        // Load interceptorMeta
                        //导入ARouter$$Interceptors$$app.java,初始化Warehouse.interceptorsIndex集合
                        ((IInterceptorGroup) (Class.forName(className).getConstructor().newInstance())).loadInto(Warehouse.interceptorsIndex);
                    } else if (className.startsWith(ROUTE_ROOT_PAKCAGE + DOT + SDK_NAME + SEPARATOR + SUFFIX_PROVIDERS)) {
                        // Load providerIndex
                        //导入ARouter$$Providers$$app.java,初始化Warehouse.providersIndex集合
                        ((IProviderGroup) (Class.forName(className).getConstructor().newInstance())).loadInto(Warehouse.providersIndex);
                    }
                }
    
                /*******部分代码省略********/
            } catch (Exception e) {
                throw new HandlerException(TAG + "ARouter init logistics center exception! [" + e.getMessage() + "]");
            }
        }
    }
    
  • 综上所述,整个初始化的流程大概就是:
    • 初始化运行时的上下文环境
    • 初始化日志logger
    • 寻找router相关的类
    • 解析并且缓存路由相关信息
    • 初始化拦截服务

6.2 跳转页面流程

  • ARouter路由解析_第2张图片
    image

07.ARouter调用api

7.1 最简单调用

  • 最简单的调用方式
    ARouter.getInstance()
                    .build("/user/UserFragment")
                    .navigation();
    

7.2 build源码分析

  • 这个主要是添加跳转的路径
    public Postcard build(String path) {
        return _ARouter.getInstance().build(path);
    }
    
  • 然后把这个路径添加到默认的组中
    /**
     * Build postcard by path and default group
     */
    protected Postcard build(String path) {
        if (TextUtils.isEmpty(path)) {
            throw new HandlerException(Consts.TAG + "Parameter is invalid!");
        } else {
            PathReplaceService pService = ARouter.getInstance().navigation(PathReplaceService.class);
            if (null != pService) {
                path = pService.forString(path);
            }
            return build(path, extractGroup(path));
        }
    }
    

7.3 navigation分析

  • 如下所示
    final class _ARouter {
        protected Object navigation(final Context context, final Postcard postcard, final int requestCode, final NavigationCallback callback) {
            try {
                LogisticsCenter.completion(postcard);
            } catch (NoRouteFoundException ex) {
                /**************部分代码省略***************/
                if (null != callback) {
                    callback.onLost(postcard);
                } else {    // No callback for this invoke, then we use the global degrade service.
                    DegradeService degradeService = ARouter.getInstance().navigation(DegradeService.class);
                    if (null != degradeService) {
                        degradeService.onLost(context, postcard);
                    }
                }
                return null;
            }
    
            if (null != callback) {
                callback.onFound(postcard);
            }
            //是否为绿色通道,是否进过拦截器处理
            if (!postcard.isGreenChannel()) {   // It must be run in async thread, maybe interceptor cost too mush time made ANR.
                interceptorService.doInterceptions(postcard, new InterceptorCallback() {
                    @Override
                    public void onContinue(Postcard postcard) {
                        _navigation(context, postcard, requestCode, callback);
                    }
                    @Override
                    public void onInterrupt(Throwable exception) {
                        //中断处理
                        if (null != callback) {
                            callback.onInterrupt(postcard);
                        }
                    }
                });
            } else {
                return _navigation(context, postcard, requestCode, callback);
            }
    
            return null;
        }
    
        private Object _navigation(final Context context, final Postcard postcard, final int requestCode, final NavigationCallback callback) {
            //没有上下文环境,就用Application的上下文环境
            final Context currentContext = null == context ? mContext : context;
            switch (postcard.getType()) {
                case ACTIVITY:
                    // Build intent 构建跳转的intent
                    final Intent intent = new Intent(currentContext, postcard.getDestination());
                    intent.putExtras(postcard.getExtras());
                    // Set flags. 设置flag
                    int flags = postcard.getFlags();
                    if (-1 != flags) {
                        intent.setFlags(flags);
                    } else if (!(currentContext instanceof Activity)) {    // Non activity, need less one flag.
                        //如果上下文不是Activity,则添加FLAG_ACTIVITY_NEW_TASK的flag
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    }
                    // Navigation in main looper.  切换到主线程中
                    new Handler(Looper.getMainLooper()).post(new Runnable() {
                        @Override
                        public void run() {
                            if (requestCode > 0) {  // Need start for result
                                ActivityCompat.startActivityForResult((Activity) currentContext, intent, requestCode, postcard.getOptionsBundle());
                            } else {
                                ActivityCompat.startActivity(currentContext, intent, postcard.getOptionsBundle());
                            }
    
                            if ((0 != postcard.getEnterAnim() || 0 != postcard.getExitAnim()) && currentContext instanceof Activity) {    // Old version.
                                ((Activity) currentContext).overridePendingTransition(postcard.getEnterAnim(), postcard.getExitAnim());
                            }
    
                            if (null != callback) { // Navigation over.
                                callback.onArrival(postcard);
                            }
                        }
                    });
    
                    break;
                case PROVIDER:
                    return postcard.getProvider();
                case BOARDCAST:
                case CONTENT_PROVIDER:
                case FRAGMENT:
                    Class fragmentMeta = postcard.getDestination();
                    try {
                        Object instance = fragmentMeta.getConstructor().newInstance();
                        if (instance instanceof Fragment) {
                            ((Fragment) instance).setArguments(postcard.getExtras());
                        } else if (instance instanceof android.support.v4.app.Fragment) {
                            ((android.support.v4.app.Fragment) instance).setArguments(postcard.getExtras());
                        }
    
                        return instance;
                    } catch (Exception ex) {
                        logger.error(Consts.TAG, "Fetch fragment instance error, " + TextUtils.formatStackTrace(ex.getStackTrace()));
                    }
                case METHOD:
                case SERVICE:
                default:
                    return null;
            }
    
            return null;
        }
    }
    

08.Postcard信息携带

  • Postcard主要为信息的携带者,内容是在构造一次路由信息的时候生产的,其继承于RouteMeta。RouteMeta是在代码编译时生成的内容,主要在初始化WareHouse时对跳转信息做了缓存。
  • 看看代码如下所示
    //Postcard继承于RouteMeta
    public final class Postcard extends RouteMeta
    
    
    //然后看看编译生成的文件
    /**
     * DO NOT EDIT THIS FILE!!! IT WAS GENERATED BY AROUTER. */
    public class ARouter$$Group$$me implements IRouteGroup {
      @Override
      public void loadInto(Map atlas) {
        atlas.put("/me/ExperienceCouponActivity", RouteMeta.build(RouteType.ACTIVITY, ExperienceCouponActivity.class, "/me/experiencecouponactivity", "me", null, -1, -2147483648));
        atlas.put("/me/ServiceActivity", RouteMeta.build(RouteType.ACTIVITY, ServiceActivity.class, "/me/serviceactivity", "me", null, -1, -2147483648));
        atlas.put("/me/SettingActivity", RouteMeta.build(RouteType.ACTIVITY, SettingActivity.class, "/me/settingactivity", "me", null, -1, -2147483648));
        atlas.put("/me/UdeskServiceActivity", RouteMeta.build(RouteType.ACTIVITY, UdeskServiceActivity.class, "/me/udeskserviceactivity", "me", null, -1, -2147483648));
      }
    }
    

10.DegradeService降级容错服务

  • 首先,自定义一个类,需要继承DegradeService类,如下所示
    /**
     * 
     *     @author 杨充
     *     blog  : https://github.com/yangchong211
     *     time  : 2018/08/24
     *     desc  : ARouter路由降级处理
     *     revise:
     * 
    */ @Route(path = DegradeServiceImpl.PATH) public class DegradeServiceImpl implements DegradeService { static final String PATH = "/service/DegradeServiceImpl"; @Override public void onLost(Context context, Postcard postcard) { if (context != null && postcard.getGroup().equals("activity")) { Intent intent = new Intent(context, WebViewActivity.class); intent.putExtra(Constant.URL, Constant.GITHUB); intent.putExtra(Constant.TITLE, "github地址"); ActivityCompat.startActivity(context, intent, null); } } @Override public void init(Context context) { } }
  • 如何使用该降级方案,十分简单。
    NavigationCallback callback = new NavCallback() {
        @Override
        public void onArrival(Postcard postcard) {
            LogUtils.i("ARouterUtils"+"---跳转完了");
        }
    
        @Override
        public void onFound(Postcard postcard) {
            super.onFound(postcard);
            LogUtils.i("ARouterUtils"+"---找到了");
        }
    
        @Override
        public void onInterrupt(Postcard postcard) {
            super.onInterrupt(postcard);
            LogUtils.i("ARouterUtils"+"---被拦截了");
        }
    
        @Override
        public void onLost(Postcard postcard) {
            super.onLost(postcard);
            LogUtils.i("ARouterUtils"+"---找不到了");
            DegradeServiceImpl degradeService = new DegradeServiceImpl();
            degradeService.onLost(Utils.getApp(),postcard);
        }
    };
    

11.Interceptor拦截器

  • 在ARouter模块的时候讲述Interceptor的使用,如果本次路由跳转不是走的绿色通道那么则会触发拦截器进行过滤。
    final class _ARouter {
        protected Object navigation(final Context context, final Postcard postcard, final int requestCode, final NavigationCallback callback) {
            /************部分代码省略************/
    
            if (!postcard.isGreenChannel()) {   // It must be run in async thread, maybe interceptor cost too mush time made ANR.
                interceptorService.doInterceptions(postcard, new InterceptorCallback() {
                    /**
                     * Continue process
                     *
                     * @param postcard route meta
                     */
                    @Override
                    public void onContinue(Postcard postcard) {
                        _navigation(context, postcard, requestCode, callback);
                    }
    
                    /**
                     * Interrupt process, pipeline will be destory when this method called.
                     *
                     * @param exception Reson of interrupt.
                     */
                    @Override
                    public void onInterrupt(Throwable exception) {
                        if (null != callback) {
                            callback.onInterrupt(postcard);
                        }
    
                        logger.info(Consts.TAG, "Navigation failed, termination by interceptor : " + exception.getMessage());
                    }
                });
            } else {
                return _navigation(context, postcard, requestCode, callback);
            }
            return null;
        }
    }
    
  • 拦截器的初始化
    • 在刚开始初始化的时候,就已经做了这个操作。
    final class _ARouter {
        static void afterInit() {
            // Trigger interceptor init, use byName.
            interceptorService = (InterceptorService) ARouter.getInstance().build("/arouter/service/interceptor").navigation();
        }
    }
    
  • InterceptorServiceImpl的init方法:
    @Route(path = "/arouter/service/interceptor")
    public class InterceptorServiceImpl implements InterceptorService {
        @Override
        public void init(final Context context) {
            LogisticsCenter.executor.execute(new Runnable() {
                @Override
                public void run() {
                    if (MapUtils.isNotEmpty(Warehouse.interceptorsIndex)) {
                        //循环遍历仓库中的拦截器
                        for (Map.Entry> entry : Warehouse.interceptorsIndex.entrySet()) {
                            Class interceptorClass = entry.getValue();
                            try {
                                //反射机制构造自定义的每一个拦截器实例
                                IInterceptor iInterceptor = interceptorClass.getConstructor().newInstance();
                                iInterceptor.init(context);
                                //并将其添加在缓存中
                                Warehouse.interceptors.add(iInterceptor);
                            } catch (Exception ex) {
                                throw new HandlerException(TAG + "ARouter init interceptor error! name = [" + interceptorClass.getName() + "], reason = [" + ex.getMessage() + "]");
                            }
                        }
                        interceptorHasInit = true;
                        logger.info(TAG, "ARouter interceptors init over.");
                        synchronized (interceptorInitLock) {
                            interceptorInitLock.notifyAll();
                        }
                    }
                }
            });
        }
    }
    
  • 拦截器的工作过程
    @Route(path = "/arouter/service/interceptor")
    public class InterceptorServiceImpl implements InterceptorService {
        @Override
        public void doInterceptions(final Postcard postcard, final InterceptorCallback callback) {
            if (null != Warehouse.interceptors && Warehouse.interceptors.size() > 0) {
                //检测是否初始化完所有的烂机器
                checkInterceptorsInitStatus();
                //没有完成正常的初始化,抛异常
                if (!interceptorHasInit) {
                    callback.onInterrupt(new HandlerException("Interceptors initialization takes too much time."));
                    return;
                }
                //顺序遍历每一个拦截器,
                LogisticsCenter.executor.execute(new Runnable() {
                    @Override
                    public void run() {
                        CancelableCountDownLatch interceptorCounter = new CancelableCountDownLatch(Warehouse.interceptors.size());
                        try {
                            _excute(0, interceptorCounter, postcard);
                            interceptorCounter.await(postcard.getTimeout(), TimeUnit.SECONDS);
                            //拦截器的遍历终止之后,如果有还有没有遍历的拦截器,则表示路由事件被拦截
                            if (interceptorCounter.getCount() > 0) {    // Cancel the navigation this time, if it hasn't return anythings.
                                callback.onInterrupt(new HandlerException("The interceptor processing timed out."));
                            } else if (null != postcard.getTag()) {    // Maybe some exception in the tag.
                                callback.onInterrupt(new HandlerException(postcard.getTag().toString()));
                            } else {
                                callback.onContinue(postcard);
                            }
                        } catch (Exception e) {
                            callback.onInterrupt(e);
                        }
                    }
                });
            } else {
                callback.onContinue(postcard);
            }
        }
    
        //执行拦截器的过滤事件
        private static void _excute(final int index, final CancelableCountDownLatch counter, final Postcard postcard) {
            if (index < Warehouse.interceptors.size()) {
                IInterceptor iInterceptor = Warehouse.interceptors.get(index);
                iInterceptor.process(postcard, new InterceptorCallback() {
                    @Override
                    public void onContinue(Postcard postcard) {
                        // Last interceptor excute over with no exception.
                        counter.countDown();
                        //如果当前没有拦截过滤,那么使用下一个拦截器
                        _excute(index + 1, counter, postcard);  // When counter is down, it will be execute continue ,but index bigger than interceptors size, then U know.
                    }
    
                    @Override
                    public void onInterrupt(Throwable exception) {
                        // Last interceptor excute over with fatal exception.
                        postcard.setTag(null == exception ? new HandlerException("No message.") : exception.getMessage());    // save the exception message for backup.
                        counter.cancel();
                    }
                });
            }
        }
    }
    

12.数据传输和自动注入

13.多dex的支持

  • 可查看multidex源码:
    public class ClassUtils {  
      /**
         * Identifies if the current VM has a native support for multidex, meaning there is no need for
         * additional installation by this library.
         *
         * @return true if the VM handles multidex
         */
        private static boolean isVMMultidexCapable() {
            boolean isMultidexCapable = false;
            String vmName = null;
    
            try {
                if (isYunOS()) {    // YunOS需要特殊判断
                    vmName = "'YunOS'";
                    isMultidexCapable = Integer.valueOf(System.getProperty("ro.build.version.sdk")) >= 21;
                } else {    // 非YunOS原生Android
                    vmName = "'Android'";
                    String versionString = System.getProperty("java.vm.version");
                    if (versionString != null) {
                        Matcher matcher = Pattern.compile("(\\d+)\\.(\\d+)(\\.\\d+)?").matcher(versionString);
                        if (matcher.matches()) {
                            try {
                                int major = Integer.parseInt(matcher.group(1));
                                int minor = Integer.parseInt(matcher.group(2));
                                isMultidexCapable = (major > VM_WITH_MULTIDEX_VERSION_MAJOR)
                                        || ((major == VM_WITH_MULTIDEX_VERSION_MAJOR)
                                        && (minor >= VM_WITH_MULTIDEX_VERSION_MINOR));
                            } catch (NumberFormatException ignore) {
                                // let isMultidexCapable be false
                            }
                        }
                    }
                }
            } catch (Exception ignore) {
    
            }
    
            Log.i(Consts.TAG, "VM with name " + vmName + (isMultidexCapable ? " has multidex support" : " does not have multidex support"));
            return isMultidexCapable;
        }
    }
    

14.InstantRun支持

  • 什么是InstantRun支持?
    • Android Studio 2.0 中引入的 Instant Run 是 Run 和 Debug 命令的行为,可以大幅缩短应用更新的时间。尽管首次构建可能需要花费较长的时间,Instant Run 在向应用推送后续更新时则无需构建新的 APK,因此,这样可以更快地看到更改。

15.生成的编译代码

  • 如下所示
    • ARouter路由解析_第3张图片
      image

关于其他内容介绍

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