发送短信时如何获取信息？

Question

我想在用户 receives/sends 一条短信时得到信息。为此，我创建了一个 SmsWatcher class。

using AeroMobile.Utility.Helper;
using Android.App;
using Android.Content;
using Android.Provider;

[BroadcastReceiver]
[IntentFilter(new[] { "android.provider.Telephony.SMS_RECEIVED", "android.intent.action.SENDTO", "android.provider.Telephony.SMS_DELIVER" }, Priority = (int)IntentFilterPriority.HighPriority)]
public class SmsWatcher : BroadcastReceiver
{

public override async void OnReceive(Context context, Intent intent)
{
    if (intent.Action != null)
    {
        if (intent.Action.Equals(Telephony.Sms.Intents.SmsReceivedAction))
        {
            var msgs = Telephony.Sms.Intents.GetMessagesFromIntent(intent);
            foreach (var msg in msgs)
            {
                //incoming message
            }
        }
        if (intent.Action.Equals(Telephony.Sms.Intents.SmsDeliverAction))
        {
            var msgs = Telephony.Sms.Intents.GetMessagesFromIntent(intent);
            foreach (var msg in msgs)
            {
                //outgoing message
            }
        }
    }
}

}

然后我在 MainActivity 中注册了这个广播服务，如下所示：

    //starting SMS watcher service
    var smsWatcherIntent = new Intent(ApplicationContext, typeof(SmsWatcher));
    SendBroadcast(smsWatcherIntent);

以上代码非常适用于传入消息，但不适用于传出消息。当用户发送短信时，你能帮我获取信息吗？就像我收到的信息一样？

Answer 1

根据 this answer

的启发

从 BroadcastReceiver 读取外发消息似乎并不那么容易。因此，读取 SMS 的最佳方式是通过 Cursor 从 Android 数据库读取。

下面是 Xamarin.Android 的代码片段：

    private async Task CheckAndUpdateSms(Context context)
    {
        string lastReadTimeMilliseconds = Application.Current.Properties["LastSmsReadMilliseconds"].ToString();
        ICursor cursor = context.ContentResolver.Query(Telephony.Sms.ContentUri, null, "date > ?", new string[] { lastReadTimeMilliseconds }, null);

        if (cursor != null)
        {
            int totalSMS = cursor.Count;
            if (cursor.MoveToFirst())
            {
                double maxReceivedTimeMilliseconds = 0;

                for (int j = 0; j < totalSMS; j++)
                {
                    double smsReceivedTimeMilliseconds = cursor.GetString(cursor.GetColumnIndexOrThrow(Telephony.TextBasedSmsColumns.Date)).ToProperDouble();
                    string smsReceivedNumber = cursor.GetString(cursor.GetColumnIndexOrThrow(Telephony.TextBasedSmsColumns.Address));
                    int smsType = cursor.GetString(cursor.GetColumnIndexOrThrow(Telephony.TextBasedSmsColumns.Type)).ToProperInt();

                    //you can process this SMS here

                    if (maxReceivedTimeMilliseconds < smsReceivedTimeMilliseconds) maxReceivedTimeMilliseconds = smsReceivedTimeMilliseconds;
                    cursor.MoveToNext();
                }

                //store the last message read date/time stamp to the application property so that the next time, we can read SMS processed after this date and time stamp. 
                if (totalSMS > 0)
                {
                    Application.Current.Properties["LastSmsReadMilliseconds"] = maxReceivedTimeMilliseconds.ToProperString();
                }
            }
            cursor.Close();
        }
    }

发送短信时如何获取信息？

How to get information when an SMS is send?

c#

xamarin.android

broadcastreceiver

sms