Flutter交互 原生跳Flutter頁面通過路由傳參

原生跳到Flutter頁面，由于Flutter沒有方法可以傳遞參數(shù)，所以現(xiàn)在只能依靠initialRoute的String來傳遞參數(shù)。

原生跳Flutter頁面路由傳參：
1、可以在flutterView.setInitialRoute添加參數(shù)，例如：{"path":"test_fade_app","param":"{"name":"test","version":"1.0.0"}"}
2、Flutter端runApp(new MaterialApp(home: _widgetRouter(ui.window.defaultRouteName),));，3、window.defaultRouteName可以拿到這個json字符串{"path":"test_fade_app","param":"{"name":"test","version":"1.0.0"}"}，再路由并解析參數(shù)就可以了。

Flutter 端代碼

void main() => runApp(new MaterialApp(
  home: _widgetRouter(ui.window.defaultRouteName),
));


Widget _widgetRouter(String json){
  print("==== main === json = $json");
  String path = "test_sample";
  String param = "";
  if (json != null && json.isNotEmpty && json != "/") {
    var jsonResponse = jsonDecode(json);
    path = jsonResponse["path"];
    print("==== main === path = $path");
    param = jsonResponse["param"];
    print("==== main === param = $param");
    path = path != null && path.isNotEmpty ? path : "test_sample";
    param = param != null && param.isNotEmpty ? param : "";
    switch(path){
      case "test_sample":
        return MyHomePage(title: 'Flutter Demo Home Page');
      case "test_fade_app":
        return MyFadeTest();
    }

    return MyHomePage(title: 'Flutter Demo Home Page');
  }
}

這里封裝的json數(shù)據(jù)主要包含兩層內容，一個是path也就是我們約定好的一些Flutter頁面，param是需要傳遞的一些參數(shù)，可以傳遞給flutter的頁面，作為頁面間的數(shù)據(jù)傳遞。

Android 端FlutterTestActivity 代碼

public class FlutterTestActivity extends FlutterActivity {

  private String routeStr = "";

  @Override
  public FlutterView createFlutterView(Context context) {
    HashMap<String, Object> map = new HashMap<>();
        HashMap<String, Object> params = new HashMap<>();
        params.put("version", "1.0.0");
        params.put("name", "test");
        map.put("path", "test_fade_app");
        map.put("param", JSON.toJSONString(params));
        WindowManager.LayoutParams matchParent = new WindowManager.LayoutParams(-1, -1);
        FlutterNativeView nativeView = this.createFlutterNativeView();
        FlutterView flutterView = new FlutterView(FlutterTestActivity.this, null, nativeView);
        flutterView.setInitialRoute(JSON.toJSONString(map));
        flutterView.setLayoutParams(matchParent);
        flutterView.enableTransparentBackground();
        this.setContentView(flutterView);
    return flutterView;
  }

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    GeneratedPluginRegistrant.registerWith(this);
  }
}

flutterView.enableTransparentBackground() 的作用是去除啟動flutter頁面的時候的黑屏

接下來我們將代碼進行一些優(yōu)化，方便之后統(tǒng)一管理，新建一個RouterManager管理類，router.dart代碼如下：

class RouterManager {
  static RouterManager mInstance = new RouterManager();

  static RouterManager getInstance() {
    return mInstance;
  }

  /*
    根據(jù)傳入的協(xié)議名  找到對應跳轉的路徑
   */
  StatefulWidget getPageByRouter(String json) {
    String path = "";
    String param = "";
    if (json != null && json.isNotEmpty && json != "/") {
      var jsonResponse = jsonDecode(json);
      path = jsonResponse["path"];
      print("==== router === path = $path");
      param = jsonResponse["param"];
      print("==== router === param = $param");
      path = path != null && path.isNotEmpty ? path : RouterPath.TEST_SAMPLE;
      param = param != null && param.isNotEmpty ? param : "";
    }
    Widget widget = _getWidgetPage(path);
    return widget;
  }

  Widget _getWidgetPage(String path) {
    Widget widget;
    switch (path) {
      case RouterPath.TEST_SAMPLE:
        widget = MyHomePage(title: 'Flutter Demo Home Page');
        break;
      case RouterPath.TEST_FADE_APP:
        widget = MyFadeTest();
        break;
    }
    return widget;
  }
}

class RouterPath {
  //================ 測試相關界面 =======================
  static const String TEST_SAMPLE = 'test_sample';
  static const String TEST_FADE_APP = 'test_fade_app';
}

main.dart調用方法

void main() => runApp(new MaterialApp(
  home: _widgetRouter(ui.window.defaultRouteName),
));

Widget _widgetRouter(String json){
  print("==== main === json = $json");
  return RouterManager.getInstance().getPageByRouter(json);
}

Android端的代碼現(xiàn)保持不變，之后再做對應代碼優(yōu)化。
項目demo:https://github.com/cyihui/CommonFlutter-master