ReactNativeRestart.java 文件源码

private ReactInstanceManager resolveInstanceManager() throws NoSuchFieldException, IllegalAccessException {
    ReactInstanceManager instanceManager = getReactInstanceManager();
    if (instanceManager != null) {
        return instanceManager;
    }

    final Activity currentActivity = getCurrentActivity();
    if (currentActivity == null) {
        return null;
    }

    ReactApplication reactApplication = (ReactApplication) currentActivity.getApplication();
    instanceManager = reactApplication.getReactNativeHost().getReactInstanceManager();

    return instanceManager;
}