androidios交叉推广,Flutter与Android、iOS混合+交互

说明/注意点&＃xff1a;

1.Flutter模块建立之后会生成隐藏文件.android和.iOS&＃xff0c;混合混的就是这个。

2.Android需要跳转到flutter页面最简单的方式是startActivity(FlutterActivity.createDefaultIntent(this));这里FlutterActivity来自io.flutter.embedding.android.FlutterActivity&＃xff0c;切勿弄错。

3.Android三种跳转方式(核心&＃xff1a;FlutterEngine)&＃xff1a;

a.进入到默认flutter - main 页面

startActivity(FlutterActivity.createDefaultIntent(this));

b.进入到flutter - 指定route页面

startActivity(FlutterActivity.withNewEngine().initialRoute("123").build(this));

c.进入到指定方法页面 - 通过执行指定到方法进入到页面&＃xff0c;默认指定的是main&＃xff0c;所以这个算是对a,b的复杂化写法

先得创建一个FlutterEngine去启动这个方法

FlutterEngine engine &＃61;new FlutterEngine(this);

DartExecutor.DartEntrypoint dartEntrypoint &＃61;new DartExecutor.DartEntrypoint(FlutterMain.findAppBundlePath(),"test");

engine.getDartExecutor().executeDartEntrypoint(dartEntrypoint);

FlutterEngineCache.getInstance().put("test",engine);

startActivity(FlutterActivity.withCachedEngine("test").build(this));

4.iOS三种跳转方式(核心&＃xff1a;FlutterEngine)

a.进入到默认flutter - main 页面

FlutterEngine *flutterEngine &＃61; [[FlutterEngine alloc] initWithName:&＃64;"engine"];

[flutterEngine run];

FlutterViewController *flutterViewController &＃61; [[FlutterViewController alloc] initWithEngine:flutterEngine nibName:nil bundle:nil];

[self presentViewController:flutterViewController animated:YES completion:nil];

b.进入到flutter - 指定route页面 - &＃xff01;&＃xff01;不能创建engine,如果要获取engine从 flutterViewController.engine - 官方api在setInitialRoute有说明

FlutterViewController *flutterViewController &＃61; [[FlutterViewController alloc]initWithProject:[[FlutterDartProject alloc]init] nibName:nil bundle:nil];

[flutterViewController setInitialRoute:&＃64;"123"];

[self presentViewController:flutterViewController animated:YES completion:nil];

c.进入到指定方法页面 - 通过执行指定到方法进入到页面&＃xff0c;默认指定的是main&＃xff0c;所以这个算是对a的复杂化写法

FlutterEngine *flutterEngine &＃61; [[FlutterEngine alloc] initWithName:&＃64;"engine1"];;

[flutterEngine runWithEntrypoint:&＃64;"test" libraryURI:nil];

FlutterViewController*flutterViewController &＃61;

[[FlutterViewController alloc] initWithEngine:flutterEngine nibName:nilbundle:nil];

[self presentViewController:flutterViewController animated:YES completion:nil];

注意&＃xff1a;Android 中 new FlutterEngine 就必须指定这个engine执行哪个方法,即executeDartEntrypoint&＃xff0c;所以c特殊&＃xff1b;iOS 中run就是默认main&＃xff0c;但是如果需要指定路由进入则不能手动调用run&＃xff0c;所以b特殊。

5.交互&＃xff1a;Flutter和Android方使用的是MethodChannel和EventChannel; iOS方使用的是FlutterMethodChannel和FlutterEventChannel。核心依然是FlutterEngine&＃xff0c;Engine就是一个贯穿始终的驱动器&＃xff0c;用哪个Engine驱动的页面也应该用哪个Engine去交互。

6.Flutter传输到Native直接创建一个MethodChannel然后methodChannel.invokeMethod()就可以&＃xff1b;Native注意channelName和methodName保持一致&＃xff0c;可以通过result回调函数回调结果给flutter。

7.Native传输到Flutter通过创建一个EventChannel&＃xff0c;flutter通过eventChannel.receiveBroadcastStream().listen&＃xff0c;涉及到stream,那么怎么把东西添加到stream呢&＃xff0c;自然是sink。所以Native setStreamHandler 将接口/协议中的EventSink保存起来&＃xff0c;在需要传值的地方触发回调就好了。