Delete SMS

Question

I am unable to delete an SMS.
Allways I try, I get no error but nothing is deleted (count = 0)
I have permission to ReadSms and WriteSms.
This is my code, called in MainActivity:

    public int DeleteSMS(string number)
    {
        int count = 0;
        ICursor cursor = ContentResolver.Query(Uri.Parse("content://sms/"), new string[] { "_id", "thread_id", "address" }, null, null, null);

        if (cursor != null && cursor.MoveToFirst())
        {
            do
            {
                string id = cursor.GetString(0);
                long threadId = cursor.GetLong(1);
                string address = cursor.GetString(2);

                if (address == number)
                {
                    count += ContentResolver.Delete(Uri.Parse("content://sms/" + id), null, null);
                }

            } while (cursor.MoveToNext());
        }
        return count;
    }

Any idea?

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

On Android, the system only allows the default app to write message data to the provider, although other apps can read at any time. To delete an SMS in your application, you need to set the application as the default SMS app on the device.

Tutorial:
https://developer.android.com/about/versions/kitkat.html#44-sms-provider

Best Regards,

Jarvan Zhang

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