flutter和Android原生互動

flutter和Android原生互動使用 methodchannel

Android 原生程式碼

package com.clear.hui;

import android.app.Activity;
import android.os.Binder;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import io.flutter.Log;
import io.flutter.embedding.android.FlutterActivity;
import io.flutter.embedding.engine.plugins.FlutterPlugin;
import io.flutter.embedding.engine.plugins.activity.ActivityAware;
import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;


public class BasePulgin implements ActivityAware, FlutterPlugin, MethodChannel.MethodCallHandler {
    FlutterPluginBinding flutterPluginBinding;
    ActivityPluginBinding activityPluginBinding;
    MethodChannel methodChannel;


    @Override
    public void onAttachedToActivity(@NonNull ActivityPluginBinding binding) {

    }

    @Override
    public void onDetachedFromActivityForConfigChanges() {

    }

    @Override
    public void onReattachedToActivityForConfigChanges(@NonNull ActivityPluginBinding binding) {

    }

    @Override
    public void onDetachedFromActivity() {
        try{// try 解決Attempt to invoke virtual method 'void io.flutter.plugin.common.h.lI(io.flutter.plugin.common.h$b)' on a null object reference
            methodChannel.setMethodCallHandler(null);
        }catch (Exception e){
            Log.e("eee",e.getStackTrace().toString());
        }
        methodChannel=null;
    }

    @Override
    public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result result) {
        if (call.method.startsWith("getData")) {
            int type = (int) call.arguments;
            Log.e("result", result.toString() + "====" + type);
            result.success("huihui");
        }
    }


    @Override
    public void onAttachedToEngine(@NonNull FlutterPluginBinding binding) {
        flutterPluginBinding = binding;
        methodChannel=new MethodChannel(binding.getBinaryMessenger(),"clear_hui");
        methodChannel.setMethodCallHandler(this);
    }

    @Override
    public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
    }
}
複製程式碼

package com.clear.hui;

import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

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

public class FlutterMainActivity extends FlutterActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }

    @Override
    public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
        super.configureFlutterEngine(flutterEngine);
        GeneratedPluginRegistrant.registerWith(flutterEngine);
        PluginRegistry  pluginRegistry=flutterEngine.getPlugins();
        pluginRegistry.add(new BasePulgin());

    }
}

複製程式碼

flutter module 程式碼

import 'package:flutter/services.dart';

class CommonChannels {
  EventChannel _eventChannel;

  static MethodChannel _methodChannel=MethodChannel("clear_hui");

   static Future<String> getData(int type) async{
     String userName = await _methodChannel.invokeMethod("getData",type);
   return  userName;
   }

}
複製程式碼

flutter模組呼叫

   CommonChannels.getData(1).then((value){
      print("獲取到的使用者名稱"+value);
    });
複製程式碼