android - 如何根据条件将 SMS 传递到默认 SMS 应用程序

Question

我正在寻找一个应用程序来检查设备的速度(如果是驾驶等)，如果它低于预设的阈值，它会通过标准通知将 SMS 传递到标准接收设备。如果标准失败(移动太快)。我希望它仍然传递 SMS，抑制通知，并自动向发件人发送回复。

目前，这是我用于接收和发送的内容:

    package biz.midl.drivereply;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.telephony.SmsMessage;

public class MainActivity extends BroadcastReceiver {

    int MAX_SPEED = 1000; //will have a change method later

    @Override
    public void onReceive(Context arg0, Intent arg1) {
    LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);  //context cannot be resolved
    Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

        if (lastKnownLocation.getSpeed() > MAX_SPEED)
        {
            Bundle extras = intent.getExtras();  //intent cannot be resolved

            if (extras == null)
            {
                return;
            }

            abortBroadcast();

            Object[] pdus = (Object[]) extras.get("pdus");
            SmsMessage msg = SmsMessage.createFromPdu((byte[]) pdus[0]);

            String origNumber = msg.getOriginatingAddress();            
            String reply = "The user is busy. Try again later.";

            SmsManager.getDefault().sendTextMessage(origNumber, null, reply, null, null);           
        }
    }
}

我在带有注释的行之后显示了错误。

Answer 1

由于您只对接收 SMS 时的速度感兴趣，因此无需持续监控您的位置和速度。在这种情况下，您的 BroadcastReceiver 应该实现为在 SMS_RECEIVED 广播时启动。为此，请在您的 list 中注册您的接收器，如下所示:

<receiver android:name=".SMSReceiver"> 
    <intent-filter android:priority="999"> 
        <action android:name="android.provider.Telephony.SMS_RECEIVED" /> 
    </intent-filter>
</receiver>

然后，在 onReceive() 方法中，简单地检查最后一个已知位置的速度，并在必要时回复:

@Override
public void onReceive(Context context, Intent intent)
{
    LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
    Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

    if (lastKnownLocation.getSpeed() > MAX_SPEED)
    {
        Bundle extras = intent.getExtras();

        if (extras == null)
        {
            return;
        }

        abortBroadcast();

        Object[] pdus = (Object[]) extras.get("pdus");
        SmsMessage msg = SmsMessage.createFromPdu((byte[]) pdus[0]);

        String origNumber = msg.getOriginatingAddress();            
        String reply = "The user is busy. Try again later.";

        SmsManager.getDefault().sendTextMessage(origNumber, null, reply, null, null);           
    }
}

在上面的示例中，接收器的优先级设置为最大值 (999)，因此它将首先接收 SMS_RECEIVED 广播。然后，如果速度大于您定义的速度限制，广播将中止，并向发件人发送回复。否则，什么都不做，广播将继续发送给其他已注册接收它的接收者，例如平台 SMS 应用程序。