Question

我想创建可以从端口接收SMS的应用！但是当它运行时，我的msg.getMessageBody()返回null。我该如何修理它？

manifext.xml

<receiver android:name="data.SMSReceiver" android:enabled="true">
        <intent-filter>
            <action android:name="android.provider.telephony.SMS_RECEIVED" />
            <data android:scheme="sms"
                android:host="*"
                android:port="4030"/>
        </intent-filter>

广播接收器代码

public class SMSReceiver extends BroadcastReceiver {

private static final String SHORTCODE = "+9810004473";

@Override
public void onReceive(Context context, Intent intent) {
    Bundle bundle = intent.getExtras();

    Object[] messages = (Object[])bundle.get("pdus");
    SmsMessage[] sms = new SmsMessage[messages.length];
    for(int n=0; n < messages.length; n++) {
        sms[n] = SmsMessage.createFromPdu((byte[]) messages[n]);
    }
    for(SmsMessage msg : sms) {
        if(TextUtils.equals(msg.getOriginatingAddress(), SHORTCODE)) {
            Toast.makeText(context, "SMS: " + msg.getMessageBody(), Toast.LENGTH_LONG).show();
        }
    }
}

}

我的Toast显示：SMS: null

Answer 1

您可以将此代码替换为onReceive中的代码：

// Get the object of SmsManager
final SmsManager sms = SmsManager.getDefault();

public void onReceive(Context context, Intent intent) {

    // Retrieves a map of extended data from the intent.
    final Bundle bundle = intent.getExtras();

    try {

      Bundle bundle = intent.getExtras(); 

        String recMsgString = "";            
        String fromAddress = "";
        SmsMessage recMsg = null;
        byte[] data = null;
        if (bundle != null)
        {
            //---retrieve the SMS message received---
           Object[] pdus = (Object[]) bundle.get("pdus");
            for (int i=0; i<pdus.length; i++){
                recMsg = SmsMessage.createFromPdu((byte[])pdus[i]);

                try {
                    data = recMsg.getUserData();
                } catch (Exception e){

                }
                if (data!=null){
                    for(int index=0; index<data.length; ++index)
                    {
                           recMsgString += Character.toString((char)data[index]);
                    } 
                }

                fromAddress = recMsg.getOriginatingAddress();
            }

    } catch (Exception e) {
        Log.e("SmsReceiver", "Exception smsReceiver" +e);

    }
}

好的，如果你之前编码了你的消息，并且你现在想要解码它，你必须遵循吹嘘的步骤，但如果不是只删除整个onReceive并替换我的代码。您在错误的地方解密您的邮件，您必须遵循我写的确切步骤。你必须在这里得到消息（在获得data之后）：

    if (data!=null){
                    for(int index=0; index<data.length; ++index)
                    {
                           recMsgString += Character.toString((char)data[index]);
                    } 
                }
String decryptedData = Base64.decode(recMsgString ,...)//add this line

在recMsgString中获取消息字符串后，您可以使用Base64类对其进行解密。

从端口接收短信

1 个答案: