1.假设你已经熟悉flutter 开发熟悉dart 语言 android 原生开发技能

一、在安卓原生项目添加代码

1.创建示例布局

2.native页面activity 创建

跳转掉flutter页面这里没啥说的，会安卓原生开发的都懂

public void openPage(View view) {startActivity(new Intent(this, MainActivity.class));}

3.把flutter 页面装载到上面 LinearLayout里面加载flutter写的页面

1. 关联上面LinearLayout

 FlutterView flutterView = new FlutterView(this);FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT);LinearLayout flContainer = findViewById(R.id.ll);flContainer.addView(flutterView, lp);

2.flutterView.attachToFlutterEngine(flutterEngine);

  flutterEngine = new FlutterEngine(this);flutterEngine.getDartExecutor().executeDartEntrypoint(DartExecutor.DartEntrypoint.createDefault());flutterView.attachToFlutterEngine(flutterEngine);

3.以上执行并不会显示加载fluuter页面的内容需要引擎关联页面的生命周期

 @Overrideprotected void onResume() {super.onResume();flutterEngine.getLifecycleChannel().appIsResumed();}@Overrideprotected void onPause() {super.onPause();flutterEngine.getLifecycleChannel().appIsInactive();}@Overrideprotected void onStop() {super.onStop();flutterEngine.getLifecycleChannel().appIsPaused();}	

总结、通过上面的步骤就可以显示flutter页面内容如图

另外还有几种方法可以实现

1、FlutterFragment

 FlutterFragment flutterFragment = FlutterFragment.createDefault();getSupportFragmentManager().beginTransaction().add(R.id.ll, flutterFragment).commit();

2.FlutterFragment.withNewEngine()

FlutterFragment flutterFragment = FlutterFragment.withNewEngine().initialRoute("route1").build();getSupportFragmentManager().beginTransaction().add(R.id.ll, flutterFragment).commit();

3.FlutterFragment.withCachedEngine

FlutterEngine flutterEngine = new FlutterEngine(this);flutterEngine.getNavigationChannel().setInitialRoute("route1");flutterEngine.getDartExecutor().executeDartEntrypoint(DartExecutor.DartEntrypoint.createDefault());FlutterEngineCache.getInstance().put("my_engine_id", flutterEngine);// 通过FlutterFragment引入Flutter编写的页面FlutterFragment flutterFragment = FlutterFragment.withCachedEngine("my_engine_id").build();