我正在开发一个Compacitor混合应用程序。我试图按照此页面中的说明操作：https://capacitor.ionicframework.com/docs/plugins/android，以启动ActivityForResult（从混合JavaScript部分），在本地secondActivity中做一些事情并将结果返回到混合部分。这里是其他地方问的类似问题没有答案！https://github.com/ionic-team/capacitor/issues/1044这是关于我的应用程序的简要描述：一个离子空白应用程序+电容器：这是我家的代码.page.ts

import {Component} from '@angular/core';
import {Plugins} from '@capacitor/core';
//typeface
declare global {
    interface PluginRegistry {
        PluginTest2 ? : PluginTest2;
    }
}
interface PluginTest2 {
    goToActivity(): Promise < any > ;
}
@Component({
    selector: 'app-home',
    templateUrl: 'home.page.html',
    styleUrls: ['home.page.scss'],
})
export class HomePage {
    goToSecondActivity() {
    const {PluginTest2} = Plugins;
        PluginTest2.goToActivity().then((result) => {
            // I want data from SecondActivity back here and log it!
            console.log(result);
        })
    }
 }

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而home.page.html只是一个按钮，用来激活goToSecondActivity（）;方法。在android studio中打开capacitor项目后，我添加了这个类：

package com.alihaghighicapacitor.qom;
import android.content.Intent;
import com.getcapacitor.JSObject;
import com.getcapacitor.NativePlugin;
import com.getcapacitor.Plugin;
import com.getcapacitor.PluginCall;
import com.getcapacitor.PluginMethod;
@NativePlugin()
public class PluginTest2 extends Plugin {
    @PluginMethod()
    public void goToActivity(PluginCall call) {
        Intent intent = new Intent(getActivity().getApplicationContext(), secondActivity.class);
        startActivityForResult(call, intent, 1);
        // I can return this sillyData! back to "home.page.ts" but I want data from seconfActivity not this class
        JSObject ret = new JSObject();
        ret.put("added", "sillyData!");
        call.success(ret);
    }
    @Override
    protected void handleOnActivityResult(int requestCode, int resultCode, Intent data) {
        super.handleOnActivityResult(requestCode, resultCode, data);
        String recievedMessage = data.getStringExtra("Data");
        // capacitor team tutorial in the page I mentioned earlier instructs to use PluginCall as follows but IT DOES NOT WORK FOR ME!
        PluginCall savedCall = getSavedCall();
        if (savedCall == null) {
        return;
        }
       if (requestCode == REQUEST_IMAGE_PICK) {
       // Do something with the data
       }
    }
}

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这里是secondActivity.java：

package com.alihaghighicapacitor.qom;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
public class secondActivity extends AppCompatActivity {
    EditText editText;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        editText = findViewById(R.id.editText);
    }
     public void sendMeHome(View view) {
        Intent intent = new Intent();
        String message = editText.getText().toString();
        intent.putExtra("Data", message);
        finish();
    }
}

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和activity_second.xml的相关部分

<Button android:id="@+id/button"
android:onClick="sendMeHome"/>
<EditText android:id="@+id/editText"/>
//clicking the button should get the editText value and send it back to
=> previous activity => to home.page.ts => and log it

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这段代码会触发secondActivity，但在本机部分中没有接收到数据，除了我在上面的代码中注解的sillyData！如果anyBody可以帮助，它将对我有很大的帮助。MAinActivity.java

package com.alihaghighicapacitor.qom;
 import com.alihaghighicapacitor.qom.PluginTest2;
 import android.os.Bundle;
 import com.getcapacitor.BridgeActivity;
 import com.getcapacitor.Plugin;
 import java.util.ArrayList;
 public class MainActivity extends BridgeActivity {
   @Override
   public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     // Initializes the Bridge
     this.init(savedInstanceState, new ArrayList<Class<? extends Plugin>>() {{
       // Additional plugins you've installed go here
       // Ex: add(TotallyAwesomePlugin.class);
       add(PluginTest2.class);
     }});
   }
 }

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