未处理异常:MissingPluginException(未找到实现)

Question

我在几个插件上有个问题

image_picker：^0.6.2+3，位置：^2.3.5，

我做了颤栗干净的什么都没变

安卓设备：SM-N 900

安卓版本：5.0

MainActivity

import androidx.annotation.NonNull;

import io.flutter.embedding.android.FlutterActivity;
import io.flutter.embedding.engine.FlutterEngine;
import io.flutter.plugins.GeneratedPluginRegistrant;

public class MainActivity extends FlutterActivity {
  @Override
  public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
    GeneratedPluginRegistrant.registerWith(flutterEngine);
  }
} 

GeneratedPluginRegistrant

package io.flutter.plugins;

import androidx.annotation.Keep;
import androidx.annotation.NonNull;
import io.flutter.embedding.engine.FlutterEngine;
import io.flutter.embedding.engine.plugins.shim.ShimPluginRegistry;

/**
 * Generated file. Do not edit.
 * This file is generated by the Flutter tool based on the
 * plugins that support the Android platform.
 */
@Keep
public final class GeneratedPluginRegistrant {
  public static void registerWith(@NonNull FlutterEngine flutterEngine) {
    ShimPluginRegistry shimPluginRegistry = new ShimPluginRegistry(flutterEngine);
    flutterEngine.getPlugins().add(new io.flutter.plugins.deviceinfo.DeviceInfoPlugin());
      io.flutter.plugins.imagepicker.ImagePickerPlugin.registerWith(shimPluginRegistry.registrarFor("io.flutter.plugins.imagepicker.ImagePickerPlugin"));
      com.lyokone.location.LocationPlugin.registerWith(shimPluginRegistry.registrarFor("com.lyokone.location.LocationPlugin"));
    flutterEngine.getPlugins().add(new io.flutter.plugins.pathprovider.PathProviderPlugin());
      flutter.plugins.screen.screen.ScreenPlugin.registerWith(shimPluginRegistry.registrarFor("flutter.plugins.screen.screen.ScreenPlugin"));
    flutterEngine.getPlugins().add(new io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin());
      com.tekartik.sqflite.SqflitePlugin.registerWith(shimPluginRegistry.registrarFor("com.tekartik.sqflite.SqflitePlugin"));
      altercode.xyz.uniqueidentifier.UniqueIdentifierPlugin.registerWith(shimPluginRegistry.registrarFor("altercode.xyz.uniqueidentifier.UniqueIdentifierPlugin"));
    flutterEngine.getPlugins().add(new io.flutter.plugins.urllauncher.UrlLauncherPlugin());
  }
}

颤振医生

flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
 Flutter (Channel stable, v1.12.13+hotfix.5, on Microsoft Windows [Version
    6.1.7601], locale en-US)
 Android toolchain - develop for Android devices (Android SDK version 28.0.
3)
 Android Studio (version 3.5)
[!] IntelliJ IDEA Community Edition (version 2018.3)
    X Flutter plugin not installed; this adds Flutter specific functionality.
    X Dart plugin not installed; this adds Dart specific functionality.
[!] VS Code (version 1.38.1)
    X Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[!] Connected device
    ! No devices available

! Doctor found issues in 3 categories.

我的一个例外是:

(package:flutter/src/services/platform_channel.dart:319:7) E/

( 8362)：错误:MissingPluginException/lib/ui/ui_dart_State.cc(157)未处理的异常:MissingPluginException(在信道lyokone/位置上未找到方法serviceEnabled的实现) E/flutter ( 8362)：#0 MethodChannel.invokeMethod MethodChannel.invokeMethod E/flutter ( 8362)：E/flutter ( 8362)：#1 Location.serviceEnabled (包:位置/位置)。(package:flutter/src/material/ink_well.dart:706:14) /flutter ( 8362)：#2 _SettingState._wifiStatus (包：_SettingState._wifiStatus__SettingState._wifiStatus/Setting.Dart:231:49)E/颤振( 8362)：#3 _InkResponseState._handleTap _SettingState._wifiStatus E/颤振( 8362)：#4 _InkResponseState.build。(package:flutter/src/material/ink_well.dart:789:36) E/颤振( 8362)：#5 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24) E/颤振( 8362)：#6 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:486:11) E/颤振( 8362)：#7 BaseTapGestureRecognizer._checkUp (包装:颤振/src/手势/踢踏舞:264:5)E/ (package:flutter/src/gestures/pointer_router.dart:76:12) ( 8362)：#8 BaseTapGestureRecognizer.handlePrimaryPointer (包装:颤振/src/手势/踢踏舞:199:7)E/颤振( 8362)：#9 PrimaryPointerGestureRecognizer.handleEvent BaseTapGestureRecognizer.handlePrimaryPointer E/颤振( 8362)：#10 PointerRouter._dispatch PointerRouter._dispatchEventToRoutes E/颤振( 8362)：#11 PointerRouter._dispatchEventToRoutes。(package:flutter/src/gestures/pointer_router.dart:117:9) E/颤振( 8362)：#12 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:379:8) E/颤振( 8362)：#13 PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:115:18) E/颤振( 8362)：#14 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart：101:7) E/颤振( 8362)：#15 (package:flutter/src/gestures/binding.dart:218:19) E/颤振( 8362)：#16 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22) E/颤振( 8362)：#17 GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7) E/颤振( 8362)：#18 GestureBinding._(package:flutter/src/gestures/binding.dart:102:7) E/ flushPointerEventQueue ( 8362)：#19 GestureBinding._handlePointerDataPacket GestureBinding._handlePointerDataPacket E/flushPointerEventQueue( 8362)：#20 _rootRunUnary (飞镖:异步/zone.dart:1138:13)E/GestureBinding._handlePointerDataPacket( 8362)：#21 _CustomZone.runUnary (飞镖:异步/zone.dart:1031:19)E/颤振( 8362)：#22 _CustomZone.runUnaryGuarded (飞镖:异步:933:7)E/颤振( 8362)：#23 _invoke1 (飞镖:ui/hooks.dart:273:10)E/ _dispatchPointerDataPacket：#24 _dispatchPointerDataPacket(飞镖:ui/Hooks.Dart:182:5)

我的密码是：

var _locationService = new Location();

bool serviceStatus = await _locationService.serviceEnabled();

Answer 1

添加插件后，您是否尝试过运行重新启动？使用hot reload运行应用程序可能还没有包含您最近在构建中添加的插件。