React Native拆包（Android端）

// 添加容器
RNStackUtil.single().createContext();



// 添加业务代码
RNStackUtil.single().loadBusinessScript();


// 执行跳转
Intent inventoryIntent = new Intent();
inventoryIntent.putExtra(AppConst.RN_PAGE, "inventory_list");
inventoryIntent.putExtra(AppConst.RN_PRODUCT, AppConst.RN_PRODUCT_INVENTORY);
inventoryIntent.setClass(context, InventoryReactActivity.class);
context.startActivity(inventoryIntent);

RNStackUtil 类中代码块

  private static ReactNativeHost host;

   public static ReactNativeHost getReactNativeHost(Application application) {

        if (host == null) {

            final String path = CommUtil.getContext().getFilesDir().getAbsolutePath()
                    + File.separator + "ShenmaEV_RN_Inventory" + File.separator + "framework"+ File.separator + "common.jsbundle";

            host = new ReactNativeHost(application, "ShenmaEV_RN_Inventory") {
                @Override
                public boolean getUseDeveloperSupport() {
                    return CommUtil.isDebug();
                }

                @Override
                protected List<ReactPackage> getPackages() {
                    return Arrays.<ReactPackage>asList(
                            new MainReactPackage(),
                            new LinearGradientPackage(),
                            new RNDeviceInfo(),
                            new ContactPackage()
                    );
                }

                @Override
                protected String getJSMainModuleName() {
                    return "index";
                }

                @NonNull
                @Override
                protected String getJSBundleFile() {
                    return path;
                }

//                @Override
//                protected String getBundleAssetName() {
//                    return "common_framework_.bundle";
//                }

            };
        }

        return host;
    }


    private String TAG = "RNStackUtil";
    private long time1;
    private long time2;
    private long time3;

    public void createContext() {
        Log.d(TAG, "start createContext");
        SoLoader.init(AppContext.get(), /* native exopackage */ false);
        time1 = new Date().getTime();
        final ReactInstanceManager manager = ((ReactApplication) AppContext.get()).getReactNativeHost().getReactInstanceManager();
        if (!manager.hasStartedCreatingInitialContext()) {
            manager.addReactInstanceEventListener(new ReactInstanceManager.ReactInstanceEventListener() {
                @Override
                public void onReactContextInitialized(ReactContext context) {
                    time2 = new Date().getTime();
                    onContextInitialized();
                }
            });
            ((ReactApplication)AppContext.get()).getReactNativeHost().getReactInstanceManager().createReactContextInBackground();
        }
    }

    public void unLoad() {
        ((ReactApplication)AppContext.get()).getReactNativeHost().getReactInstanceManager().destroy();
        Toast.makeText(AppContext.get(), "ReactContext已卸载完成~", Toast.LENGTH_LONG).show();
    }

    private void onContextInitialized() {

        Toast.makeText(AppContext.get(), "ReactContext初始化完毕", Toast.LENGTH_LONG).show();
        Log.e(TAG, "onContextInitialized");
//        // 方式一，通过反射加载bundle[图片资源可以顺带被加载]

////        // 方式二,通过JSBundleLoader直接加载[单纯加载bundle，图片资源无法加载]
//////        loadBundleFromAssetsByJSBundleLoader("asset:///subA_.bundle");
//////        loadBundleFromAssetsByJSBundleLoader("asset:///subB_.bundle");
//////        loadBundleFromAssetsByJSBundleLoader("asset:///subC_.bundle");
        time3 = new Date().getTime();
        Log.d(TAG, "onContextInitialized, time1: " + time1 + ", " + time2 + ", " + time3);
    }

    public void loadBusinessBundle() {
        loadBundleFromAssets("index_.bundle");
    }

    public void loadBundleFromAssets(String bundlepath) {
        String source = "assets://" + bundlepath;
        Log.e("RNN", "wk loadScriptFromAsset:"+source);
        try {
            Method method = CatalystInstanceImpl.class.getDeclaredMethod("loadScriptFromAssets",
                    AssetManager.class,
                    String.class,
                    boolean.class);
            method.setAccessible(true);
            method.invoke(((ReactApplication)AppContext.get()).getReactNativeHost().getReactInstanceManager().getCurrentReactContext().getCatalystInstance(), (AppContext.get()).getAssets(), source, false);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    }


    //外部地址加载
    public void loadBusinessScript() {

        CatalystInstance instance = ((ReactApplication)AppContext.get()).getReactNativeHost().getReactInstanceManager().getCurrentReactContext().getCatalystInstance();
//        CatalystInstance instance = context.getCatalystInstance();

        final String path = CommUtil.getContext().getFilesDir().getAbsolutePath()
                + File.separator + "ShenmaEV_RN_Inventory" + File.separator + "business" + File.separator + "index_.jsbundle";

//        String path = EffectApplication.getInstance().getExternalCacheDir()+"/business.android.jsbundle";
//        String path = "";
        try {
            Method method = CatalystInstanceImpl.class
                    .getDeclaredMethod("loadScriptFromFile",
                            String.class,
                            String.class,
                            boolean.class);
            method.setAccessible(true);
            method.invoke(instance, path , path , false);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}