Question

我班上的onReceive（）会收听短信并发送短信回复，一切正常但只有一次。发送短信后，应用程序关闭并显示消息＆＃34;不幸的是，您的应用已停止＆＃34;。我希望它保持活跃。我想知道我错过了什么地方。谢谢你的帮助！

public class SMSReceiver extends BroadcastReceiver {
private static final String SMS_RECEIVED="android.provider.Telephony.SMS_RECEIVED";
private static final String TAG="SMSReceiver";
@Override
public void onReceive(Context context,Intent intent){
    SmsManager smsManager=SmsManager.getDefault();
    int i;
    Toast.makeText(context,"Intent recieved",Toast.LENGTH_LONG).show();
    Log.i(TAG,"Intent recieved: "+intent.getAction());
    String messageContent="";

             if (intent.getAction() == SMS_RECEIVED) {
                 Bundle bundle = intent.getExtras();
                 if (bundle != null) {

                     Object[] pdus = (Object[])bundle.get("pdus");
                     final SmsMessage[] messages = new SmsMessage[pdus.length];
                     for (i = 0; i < pdus.length; i++) {
                         messages[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
                         messageContent=messages[i].getMessageBody().toString();
                     }
                     if (messages.length > -1 && messageContent.charAt(8)=='#') {
                         Log.i(TAG, "Message recieved: " + messages[0].getMessageBody());
                         Toast.makeText(context, "Message received from victim: "+messageContent, Toast.LENGTH_LONG).show();
                         smsManager.sendTextMessage("+919032687185",null,"Request#",null,null);
                         //Toast.makeText(context, "SMS sent.",Toast.LENGTH_LONG).show();
                         /*for(i=0;i<7;i++){
                             MediaPlayer mediaPlayer=MediaPlayer.create(context, R.raw.fire_engine_siren_could_be_police_ambulance_etc);
                             mediaPlayer.start();
                         }*/
                     }
                     /*else if(messages.length > -1 && messageContent.charAt(6) == '#'){



                         Log.i(TAG, "Location from patrol" + messages[0].getMessageBody());
                         Toast.makeText(context, "Message received from ambulance: "+messageContent, Toast.LENGTH_LONG).show();
                     }*/
                 }
             }

}

}

Answer 1

好像你得到的是java.lang.StringIndexOutOfBoundsException，我的猜测是罪魁祸首messageContent.charAt(8)，因为logcat表示length=8; index=8

如果需要找到此位置，请尝试使用indexOf。它更灵活，不会向你抛出异常。

一次调用onReceive（）然后应用程序异常关闭

1 个答案: