如何从 Java Activity 传递数据以响应本机？

Posted 2023-02-22

【中文标题】如何从 Java Activity 传递数据以响应本机？

【英文标题】：How to pass data from Java Activity to react native?

【发布时间】：2020-06-12 07:25:39

【问题描述】：

我无法从 java 活动中传递数据以做出本机反应。 我正在处理信用卡付款，付款完成后，响应存储在一个名为 message 的变量中。我需要将此消息传递给我的 react 本机代码。

//Java模块，我要传递的数据在“消息”中

公共类 HelloWorldModule 扩展 ReactContextBaseJavaModule 实现 ActivityEventListener 活动活动；

ReactApplicationContext 反应上下文； 公共 HelloWorldModule(ReactApplicationContext reactContext,Activity 活动) 超级（反应上下文）； //React Native 需要 this.reactContext=reactContext; this.activity=活动； reactContext.addActivityEventListener(this); //将本机模块注册为Activity结果监听器

@Override
public void onActivityResult(Activity activity, int requestCode, int resultCode, Intent data) 
    // ReactApplicationContext reactContext = this.getReactNativeHost().getReactInstanceManager().getCurrentReactApplicationContext();
    // reactContext.getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class).emit();
    // reactContext
    // .getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
    // .emit('message', message);

/*
 *  We advise you to do a further verification of transaction's details on your server to be
 *  sure everything checks out before providing service or goods.
*/
if (requestCode == RaveConstants.RAVE_REQUEST_CODE && data != null) 
    String message = data.getStringExtra("response");
    // Log.e("RAVE",message);
    if (resultCode == RavePayActivity.RESULT_SUCCESS) 
        Toast.makeText(activity, "SUCCESS " + message, Toast.LENGTH_SHORT).show();
    
    else if (resultCode == RavePayActivity.RESULT_ERROR) 
        Toast.makeText(activity, "ERROR " + message, Toast.LENGTH_SHORT).show();
    
    else if (resultCode == RavePayActivity.RESULT_CANCELLED) 
        Toast.makeText(activity, "CANCELLED " + message, Toast.LENGTH_SHORT).show();
    

// else 
//      super.onActivityResult(activity, requestCode, resultCode, data);
// 

// @Override // public void onActivityResult(Activity activity, int requestCode, int resultCode, Intent data) // Toast.makeText(activity, "hello", Toast.LENGTH_SHORT).show(); //

@Override

public void onNewIntent(Intent intent)

@Override
//getName is required to define the name of the module represented in javascript
public String getName()  
    return "HelloWorld";


@ReactMethod
public void sayHi(Callback errorCallback, Callback successCallback) 
    try
        int amount = 30;//call.argument("amount");
                    String narration = "Payment for soup";//call.argument("nara");
                    String countryCode = "NG"; //call.argument("countryCode");
                    String currency =  "NGN"; //call.argument("currency");
                    String amountText = "50";//call.argument("amountText");
                    String email = "*****@yahoo.com";//call.argument("email");
                    String name = "Ubanna Danny";//call.argument("name");
                    String paymentId = "a98sjkhdjdu";//call.argument("paymentId");



                    String key ="FLWPUBK-****-X";
                     String encryptionKey = "****";

                            new RavePayManager(activity).setAmount(Double.parseDouble(String.valueOf(amount)))
                            .setCountry(countryCode)
                            .setCurrency(currency)
                            .setEmail(email)
                            .setfName(name)
                            .setlName("")
                            .setNarration(narration)
                            .setPublicKey(key)
                            .setEncryptionKey(encryptionKey)
                            .setTxRef(paymentId)
                            .acceptMpesaPayments(false)
                            .acceptAccountPayments(true)
                            .acceptCardPayments(true)
                            .acceptGHMobileMoneyPayments(false)
                            .onStagingEnv(false)
                            .allowSaveCardFeature(true)
                            .initialize();
     catch (IllegalViewOperationException e) 
        errorCallback.invoke(e.getMessage());
                      

// 反应原生代码

   // async function to call the Java native method
    async sayHiFromJava() 
      HelloWorld.sayHi( (err) => console.log(err), (msg) => console.log(msg) );
    

请帮忙。

【参考方案1】：

使用设备发射器从本机发送数据以响应本机

在活动结果中添加以下代码

ReactContext context = this.getReactNativeHost().getReactInstanceManager().getCurrentReactContext();

context.getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class).emit();
context
  .getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
  .emit('message', message);

在 react native 中添加 Dives 发射器监听器

import DeviceEventEmitter from 'react-native';

EmitterModule.addListener('message', (message) => 
  console.log(message);
;

【讨论】：

请澄清我应该把代码放在哪一行，当我构建时出现此错误 - 错误：未闭合字符文字 .emit('message', message);

我需要包含这个吗 - WritableMap params = Arguments.createMap(); params.putString("eventProperty", "someValue");

如果你在使用上述代码时遇到错误，我已经编辑了我的代码

@Override public void onActivityResult(Activity activity, int requestCode, int resultCode, Intent data) ReactApplicationContext reactContext = this.getReactNativeHost().getReactInstanceManager().getCurrentReactApplicationContext(); reactContext.getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class).emit(); reactContext .getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class) .emit('message', message);

please im error this error -- error: unclosed character literal .emit('message', message);