做穿越火线的网站资料,网站建设首页需要哪些元素,无障碍 网站 怎么做,网页考试题及答案Flutter 内嵌 android 原生 View以及相互跳转 一. 内嵌android 原生View二、android 与 flutter 相互跳转 一. 内嵌android 原生View 在android 工程的包名下#xff0c;也可在MainActivity创建 android 原生view #xff0c;继承PlatformView // 1.自定义textview public st… Flutter 内嵌 android 原生 View以及相互跳转 一. 内嵌android 原生View二、android 与 flutter 相互跳转 一. 内嵌android 原生View 在android 工程的包名下也可在MainActivity创建 android 原生view 继承PlatformView // 1.自定义textview public static class MyTextView implements PlatformView{ private TextView textView ;/**** param context* param messenger 用于消息传递* param id 生成时会分配一个唯一 ID* param maps Flutter 传递的初始化参数。*/public MyTextView(Context context ,BinaryMessenger messenger,int id,MapString,Object maps) {textView new TextView(context);textView.setText(我是来自android原生的textView);if (maps ! null){String text maps.get(text).toString();textView.setText(text);}textView.setTextColor(Color.RED);}// 返回要嵌入 Flutter 层次结构的Android ViewNullableOverridepublic View getView() {return textView;}//释放此View时调用此方法调用后 View 不可用此方法需要清除所有对象引用否则会造成内存泄漏。Overridepublic void dispose() {}} 新建MyViewFactory.java注册PlatformView
public class MyViewFactory extends PlatformViewFactory {private final BinaryMessenger messenger;public MyViewFactory(BinaryMessenger messenger) {super(StandardMessageCodec.INSTANCE);this.messenger messenger;}SuppressWarnings(unchecked)Overridepublic PlatformView create(Context context, int id, Object args) {MapString, Object params (MapString, Object) args;return new MainActivity.MyTextView(context, messenger, id, params);}}创建plugin
public class MyViewFlutterPlugin implements FlutterPlugin {Overridepublic void onAttachedToEngine(NonNull FlutterPluginBinding binding) {BinaryMessenger binaryMessenger binding.getBinaryMessenger();binding.getPlatformViewRegistry().registerViewFactory(plugins.nightfarmer.top/myview,new MyViewFactory(binaryMessenger));}Overridepublic void onDetachedFromEngine(NonNull FlutterPluginBinding binding) {}
}在MainActivy 中注册 Overridepublic void configureFlutterEngine(NonNull FlutterEngine flutterEngine) {super.configureFlutterEngine(flutterEngine);flutterEngine.getPlugins().add(new MyViewFlutterPlugin());}在flutter 中使用
Container(width: 100,height: 100,child: AndroidView(viewType: plugins.nightfarmer.top/myview,creationParams: {text:Flutter传给AndroidTextView的参数},creationParamsCodec: StandardMessageCodec(),),),二、android 与 flutter 相互跳转
flutter 挑战到 原生Activity var platform MethodChannel(com.example.flutter/native_channel);void goToNativeActivity() {platform.invokeMethod(goToNative);}在MainActivty 中注册通道跳转到TestActivity private static final String CHANNEL com.example.flutter/native_channel;Overridepublic void configureFlutterEngine(NonNull FlutterEngine flutterEngine) {super.configureFlutterEngine(flutterEngine);flutterEngine.getPlugins().add(new MyViewFlutterPlugin());//注册通道new MethodChannel(flutterEngine.getDartExecutor().getBinaryMessenger(), CHANNEL).setMethodCallHandler((call, result) - {// 接收来自Flutter的方法调用if (call.method.equals(goToNative)) {Intent intent new Intent(MainActivity.this, TestActivity.class);startActivity(intent);result.success(true);} else {result.notImplemented();}});}Activity 中跳转Flutter页面 在Manifest.xml 中注册
activityandroid:nameio.flutter.embedding.android.FlutterActivityandroid:themestyle/LaunchThemeandroid:configChangesorientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiModeandroid:hardwareAcceleratedtrueandroid:windowSoftInputModeadjustResize/根据路由跳转到Flutter 页面 startActivity(FlutterActivity.withNewEngine().initialRoute(/my_route)
// .withCachedEngine(engine_id).build(currentActivity));跳转会与 2s的黑屏情况在MyApp中
public class MyApp extends Application {private FlutterEngine fe ;Overridepublic void onCreate() {super.onCreate();// 解决原生挑战到 flutter 会有2s 黑屏 的问题fe new FlutterEngine(this);fe.getDartExecutor().executeDartEntrypoint(DartExecutor.DartEntrypoint.createDefault());FlutterEngineCache.getInstance().put(engine_id,fe);}//当application 销毁的时候调用Overridepublic void onTerminate() {//销毁flutter引擎fe.destroy();super.onTerminate();}
}
在清单文件中注册 MyApp applicationandroid:namecom.qxx.ai_score_manager_flutter.MyApp
