发表Android23 分钟读完 (大约3391个字)

Android ARouter 源码解析（一）

前言

之前对 ActivityRouter 的源码做了一次分析，相信大家对路由框架已经有一个大概的理解了。

而今天给大家分析一下 ARouter 。大家在项目组件化的过程中，可能绝大多数的开发者都会使用 ARouter 来作为项目的路由框架。毕竟 ARouter 是阿里出品，优点自然不必多说了。

所以在平常使用的过程中，不仅仅要做到会用，还要深入了解一下 ARouter 的内部原理。

本次 ARouter 的解析分为三部分：

  1. 对 IRouteRoot 页面跳转进行源码解析；
  2. 对 IInterceptorGroup 拦截器进行源码解析；
  3. 对 @Autowired 自动注入进行源码解析；

本篇是 ARouter 系列的第一篇，下面就对 IRouteRoot 页面跳转进行详细解析。

ARouter 源码

使用 ARouter 的时候，都需要初始化

1
2
3
4
5
if (isDebug()) {          
    ARouter.openLog();
    ARouter.openDebug();
}
ARouter.init(mApplication);

源码分析的入口，就在 ARouter.init 里

1
2
3
4
5
6
7
8
9
10
11
12
13
public static void init(Application application) {
    if (!hasInit) {
        logger = _ARouter.logger;
        _ARouter.logger.info(Consts.TAG, "ARouter init start.");
        hasInit = _ARouter.init(application);

        if (hasInit) {
            _ARouter.afterInit();
        }

        _ARouter.logger.info(Consts.TAG, "ARouter init over.");
    }
}

源码上可以看到，ARouter 的内部其实是 _ARouter 在起作用，ARouter 只是把 _ARouter 再做了一层包装。那么我们就跟进 _ARouter 的 init 方法。

1
2
3
4
5
6
7
8
9
protected static synchronized boolean init(Application application) {
    mContext = application;
    LogisticsCenter.init(mContext, executor);
    logger.info(Consts.TAG, "ARouter init success!");
    hasInit = true;
    mHandler = new Handler(Looper.getMainLooper());

    return true;
}

最重要的一句代码还是 LogisticsCenter.init(mContext, executor) ，其中 executor 是线程池。

那么问题来了， LogisticsCenter 是干什么的呢？

* LogisticsCenter contains all of the map.
* 
* 1. Creates instance when it is first used.
* 2. Handler Multi-Module relationship map(*)
* 3. Complex logic to solve duplicate group definition

根据官方的注释，LogisticsCenter 是包含了所有的映射，处理跨模块的映射关系以及匹配路由等。

所以根据之前 ActivityRouter 的经验猜测得到，LogisticsCenter 的 init 方法里面，肯定会去加载路由，并建立关系。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
public synchronized static void init(Context context, ThreadPoolExecutor tpe) throws HandlerException {
    mContext = context;
    executor = tpe;

    try {
        long startInit = System.currentTimeMillis();
        //billy.qi modified at 2017-12-06
        //load by plugin first
        loadRouterMap();
        if (registerByPlugin) {
            logger.info(TAG, "Load router map by arouter-auto-register plugin.");
        } else {
            Set<String> routerMap;

            // 如果是debug或者新版本的话，会去重新加载路由映射
            if (ARouter.debuggable() || PackageUtils.isNewVersion(context)) {
                logger.info(TAG, "Run with debug mode or new install, rebuild router map.");
                // 加载路由映射
                routerMap = ClassUtils.getFileNameByPackageName(mContext, ROUTE_ROOT_PAKCAGE);
                // 保存所有的路由映射到 SharedPreferences
                if (!routerMap.isEmpty()) {
                    context.getSharedPreferences(AROUTER_SP_CACHE_KEY, Context.MODE_PRIVATE).edit().putStringSet(AROUTER_SP_KEY_MAP, routerMap).apply();
                }
                // 保存新版本号到 sharedpreference
                PackageUtils.updateVersion(context);    // Save new version name when router map update finishes.
            } else {
                // 否则就从 SharedPreferences 中读取之前保存的所有路由映射
                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<String>()));
            }

            logger.info(TAG, "Find router map finished, map size = " + routerMap.size() + ", cost " + (System.currentTimeMillis() - startInit) + " ms.");
            startInit = System.currentTimeMillis();

            // 把上面加载得到的路由映射根据ClassName分为三种，分别进行注册
            // IRouteRoot 页面跳转
            // IInterceptorGroup 拦截器
            // IProviderGroup 服务组件
            for (String className : routerMap) {
                if (className.startsWith(ROUTE_ROOT_PAKCAGE + DOT + SDK_NAME + SEPARATOR + SUFFIX_ROOT)) {
                    // This one of root elements, load root.
                    ((IRouteRoot) (Class.forName(className).getConstructor().newInstance())).loadInto(Warehouse.groupsIndex);
                } else if (className.startsWith(ROUTE_ROOT_PAKCAGE + DOT + SDK_NAME + SEPARATOR + SUFFIX_INTERCEPTORS)) {
                    // Load interceptorMeta
                    ((IInterceptorGroup) (Class.forName(className).getConstructor().newInstance())).loadInto(Warehouse.interceptorsIndex);
                } else if (className.startsWith(ROUTE_ROOT_PAKCAGE + DOT + SDK_NAME + SEPARATOR + SUFFIX_PROVIDERS)) {
                    // Load providerIndex
                    ((IProviderGroup) (Class.forName(className).getConstructor().newInstance())).loadInto(Warehouse.providersIndex);
                }
            }
        }

        ...
        
    } catch (Exception e) {
        throw new HandlerException(TAG + "ARouter init logistics center exception! [" + e.getMessage() + "]");
    }
}

LogisticsCenter 的 init 方法的代码基本上都可以看得懂，其中 ClassUtils.getFileNameByPackageName 是我们值得探究的地方。这句代码主要做的事情就是从 dex 中遍历 class 找到 arouter-compiler 生成的类集合。具体的分析我们到最后面再讲，这里先埋个伏笔。

接着往下看，我们知道，routerMap 中的 className 都是 arouter-compiler 在编译期生成的，那我们先来看看生成的类长什么样

1
2
3
4
5
6
7
8
9
/**
 * DO NOT EDIT THIS FILE!!! IT WAS GENERATED BY AROUTER. */
public class ARouter$$Root$$app implements IRouteRoot {
  @Override
  public void loadInto(Map<String, Class<? extends IRouteGroup>> routes) {
    routes.put("test", ARouter$$Group$$test.class);
    routes.put("yourservicegroupname", ARouter$$Group$$yourservicegroupname.class);
  }
}

ARouter 的路由会分组加载，比如当前有 /test/abc 和 /test/def 两个路由，那他们同属于 /test 这个组。所以在 Warehouse.groupsIndex 中存放的 key 是路由组名，value 是对应组路由类。查找路由的时候也是根据组名 key ，再找到组路由类 value 中查找匹配的路由。

1
2
3
4
5
6
7
8
9
10
11
12
13
/**
 * DO NOT EDIT THIS FILE!!! IT WAS GENERATED BY AROUTER. */
public class ARouter$$Group$$test implements IRouteGroup {
  @Override
  public void loadInto(Map<String, RouteMeta> atlas) {
    atlas.put("/test/activity1", RouteMeta.build(RouteType.ACTIVITY, Test1Activity.class, "/test/activity1", "test", new java.util.HashMap<String, Integer>(){{put("ser", 9); put("ch", 5); put("fl", 6); put("dou", 7); put("boy", 0); put("url", 8); put("pac", 10); put("obj", 11); put("name", 8); put("objList", 11); put("map", 11); put("age", 3); put("height", 3); }}, -1, -2147483648));
    atlas.put("/test/activity2", RouteMeta.build(RouteType.ACTIVITY, Test2Activity.class, "/test/activity2", "test", new java.util.HashMap<String, Integer>(){{put("key1", 8); }}, -1, -2147483648));
    atlas.put("/test/activity3", RouteMeta.build(RouteType.ACTIVITY, Test3Activity.class, "/test/activity3", "test", new java.util.HashMap<String, Integer>(){{put("name", 8); put("boy", 0); put("age", 3); }}, -1, -2147483648));
    atlas.put("/test/activity4", RouteMeta.build(RouteType.ACTIVITY, Test4Activity.class, "/test/activity4", "test", null, -1, -2147483648));
    atlas.put("/test/fragment", RouteMeta.build(RouteType.FRAGMENT, BlankFragment.class, "/test/fragment", "test", null, -1, -2147483648));
    atlas.put("/test/webview", RouteMeta.build(RouteType.ACTIVITY, TestWebview.class, "/test/webview", "test", null, -1, -2147483648));
  }
}

可以看到路由相关的参数配置被构造成了一个 RouteMeta 对象。RouteMeta 类如下所示：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
public class RouteMeta {
    private RouteType type;         // Type of route
    private Element rawType;        // Raw type of route
    private Class<?> destination;   // Destination
    private String path;            // Path of route
    private String group;           // Group of route
    private int priority = -1;      // The smaller the number, the higher the priority
    private int extra;              // Extra data
    private Map<String, Integer> paramsType;  // Param type
    private String name;

    private Map<String, Autowired> injectConfig;  // Cache inject config.

    ...
}

到这里，加载路由的部分就完成了，剩下的就是跳转路由了。

跳转路由的通常操作：

ARouter.getInstance().build("/test/abc").navigation();

那先看一下 ARouter 的 build 方法

1
2
3
 public Postcard build(String path) {
    return _ARouter.getInstance().build(path);
}

里面调用的是 _ARouter 的 build 方法。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
protected Postcard build(String path) {
    if (TextUtils.isEmpty(path)) {
        throw new HandlerException(Consts.TAG + "Parameter is invalid!");
    } else {
        // 获取 PathReplaceService 实例，如果不为空，就处理 path
        PathReplaceService pService = ARouter.getInstance().navigation(PathReplaceService.class);
        if (null != pService) {
            path = pService.forString(path);
        }
        return build(path, extractGroup(path));
    }
}

/**
 * 截取跳转路径中的第一段作为分组名
 */
private String extractGroup(String path) {
    if (TextUtils.isEmpty(path) || !path.startsWith("/")) {
        throw new HandlerException(Consts.TAG + "Extract the default group failed, the path must be start with '/' and contain more than 2 '/'!");
    }

    try {
        String defaultGroup = path.substring(1, path.indexOf("/", 1));
        if (TextUtils.isEmpty(defaultGroup)) {
            throw new HandlerException(Consts.TAG + "Extract the default group failed! There's nothing between 2 '/'!");
        } else {
            return defaultGroup;
        }
    } catch (Exception e) {
        logger.warning(Consts.TAG, "Failed to extract default group! " + e.getMessage());
        return null;
    }
}

PathReplaceService 是官方给我们预留的口子，用来对 path 做预处理。如果你有需求来对 path 做统一的预处理，那么直接实现 PathReplaceService 即可。

我们接着跟进，看下 _ARouter.build(String path, String group) 方法

1
2
3
4
5
6
7
8
9
10
11
protected Postcard build(String path, String group) {
    if (TextUtils.isEmpty(path) || TextUtils.isEmpty(group)) {
        throw new HandlerException(Consts.TAG + "Parameter is invalid!");
    } else {
        PathReplaceService pService = ARouter.getInstance().navigation(PathReplaceService.class);
        if (null != pService) {
            path = pService.forString(path);
        }
        return new Postcard(path, group);
    }
}

发现在 build(String path, String group) 中直接创建了一个 Postcard 对象并返回。Postcard 类是继承了 RouteMeta ，额外添加了一些其他的信息。

有了 Postcard 之后，直接调用 navigation 进行跳转。

1
2
3
4
5
6
7
public Object navigation(Context context, NavigationCallback callback) {
    return ARouter.getInstance().navigation(context, this, -1, callback);
}

public void navigation(Activity mContext, int requestCode, NavigationCallback callback) {
    ARouter.getInstance().navigation(mContext, this, requestCode, callback);
}

Postcard 的所有 navigation 方法最后都会调用 ARouter 的 navigation 这个方法。

1
2
3
public Object navigation(Context mContext, Postcard postcard, int requestCode, NavigationCallback callback) {
    return _ARouter.getInstance().navigation(mContext, postcard, requestCode, callback);
}

最后还是调用了 _ARouter.navigation 

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
protected Object navigation(final Context context, final Postcard postcard, final int requestCode, final NavigationCallback callback) {
    try {
        // 将 postcard 与路由表中进行匹配，并且填充 postcard 的数据
        LogisticsCenter.completion(postcard);
    } catch (NoRouteFoundException ex) {
        logger.warning(Consts.TAG, ex.getMessage());
        // 如果 debug ，就显示匹配错误
        if (debuggable()) {
            // Show friendly tips for user.
            runInMainThread(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(mContext, "There's no route matched!\n" +
                            " Path = [" + postcard.getPath() + "]\n" +
                            " Group = [" + postcard.getGroup() + "]", Toast.LENGTH_LONG).show();
                }
            });
        }
        // 回调路由匹配失败
        if (null != callback) {
            callback.onLost(postcard);
        } else {    
            // No callback for this invoke, then we use the global degrade service.
            // 如果没有回调，就调用全局降级的策略
            DegradeService degradeService = ARouter.getInstance().navigation(DegradeService.class);
            if (null != degradeService) {
                degradeService.onLost(context, postcard);
            }
        }

        return null;
    }

    // 回调路由匹配成功
    if (null != callback) {
        callback.onFound(postcard);
    }
    // 如果不是绿色通道，就调用拦截器，拦截器这部分后面单独出来讲，这里就不讲了
    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 {
        // 否则调用 _navigation 进行跳转
        return _navigation(context, postcard, requestCode, callback);
    }

    return null;
}

private Object _navigation(final Context context, final Postcard postcard, final int requestCode, final NavigationCallback callback) {
    final Context currentContext = null == context ? mContext : context;

    switch (postcard.getType()) {
        case ACTIVITY: // 如果是 activity 的，执行跳转
            // Build intent
            final Intent intent = new Intent(currentContext, postcard.getDestination());
            intent.putExtras(postcard.getExtras());

            // Set flags.
            int flags = postcard.getFlags();
            if (-1 != flags) {
                intent.setFlags(flags);
            } else if (!(currentContext instanceof Activity)) {    // Non activity, need less one flag.
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            }

            // Set Actions
            String action = postcard.getAction();
            if (!TextUtils.isEmpty(action)) {
                intent.setAction(action);
            }

            // Navigation in main looper.
            runInMainThread(new Runnable() {
                @Override
                public void run() {
                    startActivity(requestCode, currentContext, intent, postcard, callback);
                }
            });

            break;
        case PROVIDER: // 如果是服务组件，那么直接返回该组件
            return postcard.getProvider();
        case BOARDCAST:
        case CONTENT_PROVIDER:
        case FRAGMENT: // 如果是 fragment 的话，返回该 fragment 的实例
            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;
}

上面的代码基本上都写了注释，大家应该都能看懂。

我们重点来关注下 LogisticsCenter.completion(postcard); 

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
public synchronized static void completion(Postcard postcard) {
    if (null == postcard) {
        throw new NoRouteFoundException(TAG + "No postcard!");
    }
    // 先根据 path 去获取 RouteMeta
    RouteMeta routeMeta = Warehouse.routes.get(postcard.getPath());
    if (null == routeMeta) {    // 如果 routeMeta 为空，可能是不存在或者是未加载
        Class<? extends IRouteGroup> groupMeta = Warehouse.groupsIndex.get(postcard.getGroup());  // 加载分组下的路由映射
        // 如果不存在，就报错
        if (null == groupMeta) {
            throw new NoRouteFoundException(TAG + "There is no route match the path [" + postcard.getPath() + "], in group [" + postcard.getGroup() + "]");
        } else {
            // Load route and cache it into memory, then delete from metas.
            try {
                if (ARouter.debuggable()) {
                    logger.debug(TAG, String.format(Locale.getDefault(), "The group [%s] starts loading, trigger by [%s]", postcard.getGroup(), postcard.getPath()));
                }
                // 实现按需加载
                IRouteGroup iGroupInstance = groupMeta.getConstructor().newInstance();
                iGroupInstance.loadInto(Warehouse.routes);
                // 移除 groupsIndex , 否则会造成死循环
                Warehouse.groupsIndex.remove(postcard.getGroup());

                if (ARouter.debuggable()) {
                    logger.debug(TAG, String.format(Locale.getDefault(), "The group [%s] has already been loaded, trigger by [%s]", postcard.getGroup(), postcard.getPath()));
                }
            } catch (Exception e) {
                throw new HandlerException(TAG + "Fatal exception when loading group meta. [" + e.getMessage() + "]");
            }
            // 重新加载一遍
            completion(postcard);   // Reload
        }
    } else {
        // 找到对应的 routeMeta， 填充 postcard 数据
        postcard.setDestination(routeMeta.getDestination());
        postcard.setType(routeMeta.getType());
        postcard.setPriority(routeMeta.getPriority());
        postcard.setExtra(routeMeta.getExtra());

        Uri rawUri = postcard.getUri();
        // 如果 rawUri 不为空，则是 uri 跳转。就解析 rawUri 中的参数，放入 bundle 中
        if (null != rawUri) {   // Try to set params into bundle.
            Map<String, String> resultMap = TextUtils.splitQueryParameters(rawUri);
            Map<String, Integer> paramsType = routeMeta.getParamsType();

            if (MapUtils.isNotEmpty(paramsType)) {
                // Set value by its type, just for params which annotation by @Param
                for (Map.Entry<String, Integer> params : paramsType.entrySet()) {
                    setValue(postcard,
                            params.getValue(),
                            params.getKey(),
                            resultMap.get(params.getKey()));
                }

                // Save params name which need auto inject.
                postcard.getExtras().putStringArray(ARouter.AUTO_INJECT, paramsType.keySet().toArray(new String[]{}));
            }

            // Save raw uri
            postcard.withString(ARouter.RAW_URI, rawUri.toString());
        }
        // 如果是 PROVIDER 和 FRAGMENT 类型的，开启绿色通道
        switch (routeMeta.getType()) {
            case PROVIDER:  // if the route is provider, should find its instance
                // Its provider, so it must implement IProvider
                Class<? extends IProvider> providerMeta = (Class<? extends IProvider>) routeMeta.getDestination();
                IProvider instance = Warehouse.providers.get(providerMeta);
                if (null == instance) { // There's no instance of this provider
                    IProvider provider;
                    try {
                        provider = providerMeta.getConstructor().newInstance();
                        provider.init(mContext);
                        Warehouse.providers.put(providerMeta, provider);
                        instance = provider;
                    } catch (Exception e) {
                        throw new HandlerException("Init provider failed! " + e.getMessage());
                    }
                }
                postcard.setProvider(instance);
                postcard.greenChannel();    // Provider should skip all of interceptors
                break;
            case FRAGMENT:
                postcard.greenChannel();    // Fragment needn't interceptors
            default:
                break;
        }
    }
}

至此，整个路由跳转的流程就讲完了，大致的流程可以分为

  1. 加载路由映射
  2. 根据 path 构造出 Postcard 对象
  3. 区分 Postcard 的 type 来实现跳转

番外

前面说过，ARouter 会在 dex 中寻找 arouter-compiler 生成的类。那我们最后来看看是怎么实现的。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
public static Set<String> getFileNameByPackageName(Context context, final String packageName) throws PackageManager.NameNotFoundException, IOException, InterruptedException {
    final Set<String> classNames = new HashSet<>();
    // 获取 dex 文件存放的路径
    List<String> paths = getSourcePaths(context);
    final CountDownLatch parserCtl = new CountDownLatch(paths.size());
    // 遍历所有 dex 文件的路径
    for (final String path : paths) {
        DefaultPoolExecutor.getInstance().execute(new Runnable() {
            @Override
            public void run() {
                DexFile dexfile = null;

                try {
                    // 根据路径加载 dex 文件
                    if (path.endsWith(EXTRACTED_SUFFIX)) {
                        //NOT use new DexFile(path), because it will throw "permission error in /data/dalvik-cache"
                        dexfile = DexFile.loadDex(path, path + ".tmp", 0);
                    } else {
                        dexfile = new DexFile(path);
                    }
                    // 遍历 dexfile 的中所有 className 如果是 arouter 报名开头的，就加入到 classNames 中
                    Enumeration<String> dexEntries = dexfile.entries();
                    while (dexEntries.hasMoreElements()) {
                        String className = dexEntries.nextElement();
                        if (className.startsWith(packageName)) {
                            classNames.add(className);
                        }
                    }
                } catch (Throwable ignore) {
                    Log.e("ARouter", "Scan map file in dex files made error.", ignore);
                } finally {
                    if (null != dexfile) {
                        try {
                            dexfile.close();
                        } catch (Throwable ignore) {
                        }
                    }

                    parserCtl.countDown();
                }
            }
        });
    }

    parserCtl.await();

    Log.d(Consts.TAG, "Filter " + classNames.size() + " classes by packageName <" + packageName + ">");
    return classNames;
}

我们再来看下 getSourcePaths 方法，看看它是怎么找 dex 文件路径的

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
    public static List<String> getSourcePaths(Context context) throws PackageManager.NameNotFoundException, IOException {
        ApplicationInfo applicationInfo = context.getPackageManager().getApplicationInfo(context.getPackageName(), 0);
        File sourceApk = new File(applicationInfo.sourceDir);

        List<String> sourcePaths = new ArrayList<>();
        sourcePaths.add(applicationInfo.sourceDir); //add the default apk path

        //the prefix of extracted file, ie: test.classes
        String extractedFilePrefix = sourceApk.getName() + EXTRACTED_NAME_EXT;

//        如果VM已经支持了MultiDex，就不要去Secondary Folder加载 Classesx.zip了，那里已经么有了
//        通过是否存在sp中的multidex.version是不准确的，因为从低版本升级上来的用户，是包含这个sp配置的
        if (!isVMMultidexCapable()) {
            //the total dex numbers
            int totalDexNumber = getMultiDexPreferences(context).getInt(KEY_DEX_NUMBER, 1);
            File dexDir = new File(applicationInfo.dataDir, SECONDARY_FOLDER_NAME);

            for (int secondaryNumber = 2; secondaryNumber <= totalDexNumber; secondaryNumber++) {
                //for each dex file, ie: test.classes2.zip, test.classes3.zip...
                String fileName = extractedFilePrefix + secondaryNumber + EXTRACTED_SUFFIX;
                File extractedFile = new File(dexDir, fileName);
                if (extractedFile.isFile()) {
                    sourcePaths.add(extractedFile.getAbsolutePath());
                    //we ignore the verify zip part
                } else {
                    throw new IOException("Missing extracted secondary dex file '" + extractedFile.getPath() + "'");
                }
            }
        }

        // 如果是debug的，那么额外去加载下 instant run 中的dex文件路径
        if (ARouter.debuggable()) { // Search instant run support only debuggable
            sourcePaths.addAll(tryLoadInstantRunDexFile(applicationInfo));
        }
        return sourcePaths;
    }
#

最新文章

分类

标签

CentOS2
Docker1
Dubbo7
JDBC1
JPMS1
JVM3
Kafka1
LLM1
MySQL1
Nacos21
Seata13
Sentinel18
Spring Cloud39
Spring Cloud Alibaba66
Spring Cloud Gateway6
Stable Diffusion2
TCP/IP1
ZooKeeper19
gcc1
modules1
mysql1
nginx1
nio1
分布式10
分布式事务14
加密1
基础672
多线程1
安全2
应用层1
数据库2
数据结构与算法36
方案1
源码解析18
知识点22
缓存1
网络1
设计模式25
语法1
调优2
集合4
面试题2

目录

×