通过EventChannel将Android SMS BroadcastReceiver数据发送到Flutter [英] Sending Android SMS BroadcastReceiver data to Flutter through EventChannel

问题描述

我试图在Android设备上侦听所有传入的SMS消息，然后每当接收到SMS时，在Flutter应用中显示祝酒词.我正在通过EventChannel连接到Flutter，并使用BroadcastReceiver检测SMS.每当广播接收器检测到SMS时，如何发送 events.success(message)?

I am trying to listen for any incoming SMS messages on an Android device and then showing a toast in my Flutter app whenever an SMS is received. I am connecting to Flutter through EventChannel and detecting SMS using a BroadcastReceiver. How do I send an events.success(message) whenever my broadcast receiver detects an SMS?

我尝试直接在EventChannel内部添加BroadcastReceiver，但这没有用.乱七八糟的SMS包似乎也不起作用.

I tried adding the BroadcastReceiver directly inside the EventChannel but that did not work. The flutter SMS package also doesn't seem to work.

这是我的MainActivity外观:

This is what my MainActivity looks like:

public class MainActivity extends FlutterActivity{
    public static final String STREAM = "com.myapp.thisapp/stream";
    public static final String TAG = "THIS IS A MESSAGE: ";


    @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    GeneratedPluginRegistrant.registerWith(this);

        new EventChannel(getFlutterView(), STREAM).setStreamHandler(
                new EventChannel.StreamHandler() {

                    @Override
                    public void onListen(Object args, final 
EventChannel.EventSink events) {
                        //Send events.success() when SMS received
                        Log.w(TAG, "adding listener");
                    }

                    @Override
                    public void onCancel(Object args) {
                        Log.w(TAG, "cancelling listener");
                    }
                }
        );
  }

}

这是我的BroadcastReceiver的代码:

And this is the code for my BroadcastReceiver:

public class IncomingSmsBroadcastReceiver extends BroadcastReceiver {

    private static final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";

    @Override
    public void onReceive(final Context context, final Intent intent) {

        if (intent != null && SMS_RECEIVED.equals(intent.getAction())) {
            final SmsMessage smsMessage = extractSmsMessage(intent);
            processMessage(context, smsMessage);
        }

    }

    private SmsMessage extractSmsMessage(final Intent intent) {

        final Bundle pudsBundle = intent.getExtras();
        final Object[] pdus = (Object[]) pudsBundle.get("pdus");
        final SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) pdus[0]);

        return smsMessage;

    }

    private void processMessage(final Context context, final SmsMessage smsMessage) {

        //TODO: Send message to event channel
    }

}

每当BroadCastReceiver遇到SMS时，我都希望将消息的内容发送到EventChannel，后者将消息文本发送到Flutter前端.我该怎么做?

Whenever the BroadCastReceiver encounters an SMS, I want the content of the message to be sent to the EventChannel which will send the message text to the Flutter front-end. How do I do this?

推荐答案

这是您应该在MainActivity中使用的结果

This is what you should be using in MainActivity, store the Result

        public class MainActivity extends FlutterActivity{
            public static final String STREAM = "com.myapp.thisapp/stream";
            public static final String TAG = "THIS IS A MESSAGE: ";
            public Result resultLater;


            @Override
          protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            GeneratedPluginRegistrant.registerWith(this);

            new MethodChannel(getFlutterView(), CHANNEL).setMethodCallHandler(
                    new MethodCallHandler() {
                        @Override
                        public void onMethodCall(MethodCall call, Result result) {
                            //store the reference for later access
                            resultLater = result;
                        }
                    });

           }

         public class IncomingSmsBroadcastReceiver extends BroadcastReceiver {

         private static final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";

          @Override
          public void onReceive(final Context context, final Intent intent) {

            if (intent != null && SMS_RECEIVED.equals(intent.getAction())) {
                final SmsMessage smsMessage = extractSmsMessage(intent);
                processMessage(context, smsMessage);
            }

        }

          private SmsMessage extractSmsMessage(final Intent intent) {

            final Bundle pudsBundle = intent.getExtras();
            final Object[] pdus = (Object[]) pudsBundle.get("pdus");
            final SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) pdus[0]);

            return smsMessage;

         }

       }

       private void processMessage(final Context context, final SmsMessage smsMessage) {

            //here send back result, like this
            if(smsMessage.getMessageBody()!=null){
                 result.success(smsMessage.getMessageBody());
            }else{
                 result.error("Error", "Sms not found", null);
            }

         }

  }

现在在您的主要活动中使sms广播成为子类，并在下面进行声明.并在收到短信时访问结果.从颤抖的一面，像往常一样拨打频道即可.

now make the sms broadcast sub class in your main activity and declare below. and access the result when you get the sms. And from your flutter side just make channel call as usual.

请遵循 docs示例的参考书.

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