如何通过 React Native 中的 Intent 启动和接收来自另一个应用程序的输出？

debugcn 发表于 Dev

路易

我已经使用 VSCode 创建了 React Native 应用程序，现在，我必须使用微型 USB 主机集成读取器设备。

我已经安装了阅读器应用程序来测试 APK。基于网络，我可以通过我当前应用程序的意图调用阅读器应用程序。设备网络链接在这里。

目前，我尝试了通过意图调用本机应用程序的搜索教程。但是我被困在放置脚本的方式上。我应该创建新文件/将脚本粘贴到现有文件下面/替换现有文件./android/app/src/main/java/com/myAppName/MainApplication.java以及如何调用和接收来自我的扫描仪类的输出./src/screens/scanScreens/mainScanner.js

以下是我所做的，但坚持下一步我应该做什么：-

我当前的 MainActivity.java [更新]

package com.myappname;

import com.facebook.react.ReactActivity;
import com.facebook.react.ReactActivityDelegate;
import com.facebook.react.ReactRootView;
import com.swmansion.gesturehandler.react.RNGestureHandlerEnabledRootView;

public class MainActivity extends ReactActivity {

    /**
     * Returns the name of the main component registered from JavaScript.
     * This is used to schedule rendering of the component.
     */
    @Override
    protected String getMainComponentName() {
        return "myAppName";
    }

    @Override
    protected ReactActivityDelegate createReactActivityDelegate() {
        return new ReactActivityDelegate(this, getMainComponentName()) {
        @Override
        protected ReactRootView createRootView() {
        return new RNGestureHandlerEnabledRootView(MainActivity.this);
        }
        };
    }
}
public class ShowKadModule extends ReactContextBaseJavaModule {

    @ReactMethod
    public void showKadApp() {
        final Activity activity = getCurrentActivity();
        Intent intent = new Intent ("com.causalidea.cikad.showkad.READ_MYKAD");
        Bundle extras = new Bundle ();
        extras.putBoolean ("READ_PHOTO", false); // Do not read the photo
        intent.putExtras (extras);
        activity.startActivityForResult (intent, 0); 
     }
     public ShowKadModule(ReactApplicationContext reactContext) {
        super(reactContext);
        // Add the listener for `onActivityResult`
        reactContext.addActivityEventListener(mActivityEventListener);
      }

      @Override
      public String getName() {
        return "ShowKadModule";
      }
     @Override
     public void onActivityResult(int requestCode, int resultCode, final Intent data) {
        if (resultCode == Activity.RESULT_OK) {
            extras = intent.getExtras ();

            if (extras != null) {
                extras.getString ("IC_NUMBER");
                extras.getString ("NAME");
                extras.getString ("GENDER");
                extras.getString ("CITIZENSHIP");

                extras.getString ("BIRTH_DATE");
                extras.getString ("RACE");
                extras.getString ("RELIGION");

                extras.getString ("ADDRESS_1");
                extras.getString ("ADDRESS_2");
                extras.getString ("ADDRESS_3");
                extras.getString ("POSTCODE");
                extras.getString ("CITY");
                extras.getString ("STATE");

                photoByteArray = extras.getByteArray ("PHOTO");

                if (photoByteArray != null) {
                    bitmap = BitmapFactory.decodeByteArray (photoByteArray, 0, photoByteArray.length);
                    imageView.setImageBitmap (bitmap);
                }
            }
        } else if (resultCode == Activity.RESULT_CANCELED) {

        }
     }
}

路易

在经历了这么多示例和教程之后，我找到了一个简单的解决方案。通过从这里安装 react-native-activity-result 。

我如何执行此操作如下：

import ActivityResult from 'react-native-activity-result';

_onLaunch = async () => {
    const activity = await ActivityResult.resolveActivity('com.causalidea.cikad.showkad.READ_MYKAD');
    if (!activity) {
        console.warn('Please install the othe app.');
        ToastAndroid.show(`MyKAD application reader is not install`, ToastAndroid.SHORT, ToastAndroid.BOTTOM);
    } else {
        console.log(`Activity will be handled by ${activity.package}`);
        ToastAndroid.show(`Activity will be handled by ${activity.package}`, ToastAndroid.SHORT, ToastAndroid.BOTTOM);
    }

    // Start an activity for a result
    let uniqueId = 0;
    let args = {READ_PHOTO: false};
    ToastAndroid.show(`Test`, ToastAndroid.SHORT, ToastAndroid.BOTTOM);
    const response = await ActivityResult.startActivityForResult(uniqueId, 'com.causalidea.cikad.showkad.READ_MYKAD', args);
    ToastAndroid.show(`Result code: ${response.resultCode}`, ToastAndroid.LONG, ToastAndroid.BOTTOM);


    if (response.resultCode !== ActivityResult.OK) {
        ToastAndroid.show(`Invalid result from activity.`, ToastAndroid.SHORT, ToastAndroid.BOTTOM);
        throw new Error('Invalid result from activity.');
    } else {
        console.log('Got the following response: ' + response.data);
        ToastAndroid.show(`Response:\n${JSON.stringify(response)}`, ToastAndroid.SHORT, ToastAndroid.BOTTOM);
    }

    // Finish an activity with a result. This will close the caller too.
    //ActivityResult.finish(ActivityResult.OK, 'com.causalidea.cikad.showkad.READ_MYKAD', args);
}

我可以启动另一个应用程序并等待活动结果，它会相应地进行操作。

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