------前提是继承普通的Activity------
升级之后老是报
Unable to add window -- token null is not valid; is your activity running?
升级后的package.json:

{
  "name": "RNTest01",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "ajv": "^6.0.0",
    "android": "0.0.8",
    "eslint": "^4.0.0",
    "platform": "^1.3.5",
    "react": "^16.3.1",
    "react-native": "^0.55.3",
    "react-native-fetch-blob": "^0.10.8",
    "react-native-filesystem": "^0.1.0",
    "react-native-image-crop-picker": "^0.20.1",
    "react-native-image-zoom-viewer": "^2.1.3",
    "react-native-popupwindow": "^0.3.0",
    "react-native-progress": "^3.4.0",
    "react-native-scrollable-tab-view": "^0.6.5",
    "react-native-storage": "^0.2.2",
    "react-native-swipe-list-view": "^1.1.1",
    "react-navigation": "^1.5.11"
  },
  "devDependencies": {
    "babel-jest": "19.0.0",
    "babel-preset-react-native": "1.9.1",
    "jest": "19.0.2",
    "react-test-renderer": "16.0.0-alpha.6"
  },
  "jest": {
    "preset": "react-native"
  },
  "optionalDependencies": {}
}

修改后的Activity

public class MainActivity extends Activity implements DefaultHardwareBackBtnHandler {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ReactRootView mReactRootView = new ReactRootView(this);
        // “AppRegistry.registerComponent()”的第一个参数
        mReactRootView.startReactApplication(getReactInstanceManager(), "RNTest01", null);
        setContentView(mReactRootView);
    }

    @Override
    public void invokeDefaultOnBackPressed() {
        super.onBackPressed();
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (getReactInstanceManager() != null) {
            getReactInstanceManager().onHostResume(this, this);
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (getReactInstanceManager() != null) {
            getReactInstanceManager().onHostPause(this);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (getReactInstanceManager() != null) {
            getReactInstanceManager().onHostDestroy(this);
        }
    }

    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (getReactInstanceManager() != null) {
            getReactInstanceManager().onActivityResult(this, requestCode, resultCode, data);
        }
    }

    @Override
    public void onBackPressed() {
        if (getReactInstanceManager() != null) {
            getReactInstanceManager().onBackPressed();
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_MENU && getReactInstanceManager() != null) {
            getReactInstanceManager().showDevOptionsDialog();
            return true;
        }
        return super.onKeyUp(keyCode, event);
    }

    protected ReactNativeHost getReactNativeHost() {
        return ((ReactApplication) getApplication()).getReactNativeHost();
    }

    public ReactInstanceManager getReactInstanceManager() {
        return getReactNativeHost().getReactInstanceManager();
    }
}

修改后的Application

public class MainApplication extends Application implements ReactApplication {

    private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
        @Override
        public boolean getUseDeveloperSupport() {
            return BuildConfig.DEBUG;
        }

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

        /** Assets */
        @Nullable
        @Override
        protected String getBundleAssetName() {
            return super.getBundleAssetName();
        }

        /** SD */
        @Nullable
        @Override
        protected String getJSBundleFile() {
            return super.getJSBundleFile();
        }

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

    @Override
    public ReactNativeHost getReactNativeHost() {
        return mReactNativeHost;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        SoLoader.init(this, /* native exopackage */ false);
    }
}