xamarin android read sms Inbox messages

Question

User379094 posted

hi Use the following code to display sms in listview. The problem is that it only displays one message, it does not display all messages and does not work on Android devices above 5

``` AndroidManifest.xml

```

``` string[] items; public ListView ListView;

    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        Xamarin.Essentials.Platform.Init(this, savedInstanceState);
        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.activity_main);

        Button btn = FindViewById<Button>(Resource.Id.button1);
         btn.Click += Btn_Click;
        //

    }
    private void Btn_Click(object sender, System.EventArgs e)
    {
        try
        {
            getAllSms();
            ListView = (ListView)FindViewById<ListView>(Resource.Id.listView1);
            ListView.Adapter = new ArrayAdapter(this, Android.Resource.Layout.SimpleListItem1, items);
        }
        catch
        {
        }


    }
    public void getAllSms()
    {

        string INBOX = "content://sms/inbox";
        string[] reqCols = new string[] { "_id", "thread_id", "address", "person", "date", "body", "type" };
        Android.Net.Uri uri = Android.Net.Uri.Parse(INBOX);
        var cursor = ContentResolver.Query(uri, reqCols, null, null, null);

        if (cursor.MoveToFirst())
        {
            do
            {
                String messageId = cursor.GetString(cursor.GetColumnIndex(reqCols[0]));
                String threadId = cursor.GetString(cursor.GetColumnIndex(reqCols[1]));
                String address = cursor.GetString(cursor.GetColumnIndex(reqCols[2]));
                String name = cursor.GetString(cursor.GetColumnIndex(reqCols[3]));
                String date = cursor.GetString(cursor.GetColumnIndex(reqCols[4]));
                String msg = cursor.GetString(cursor.GetColumnIndex(reqCols[5]));
                String type = cursor.GetString(cursor.GetColumnIndex(reqCols[6]));

                items = new string[] {
       ((messageId + (","
                        + (threadId + (","
                        + (address + (","
                        + (name + (","
                        + (date + (" ,"
                        + (msg + (" ," + type))))))))))))) };

            } while (cursor.MoveToNext());

        }
    }

```

Answer 1

User371688 posted

When you executed the following loop,you always created a new object new string[] {} to items,so the value of items always the latest message accessed(cursor.MoveToNext()).

 items = new string[] {
           ((messageId + (","
                            + (threadId + (","
                            + (address + (","
                            + (name + (","
                            + (date + (" ,"
                            + (msg + (" ," + type))))))))))))) };

You can define items as follows.

List<string> items = new List<string>();

instead of

 string[] items;

And when you get each item of sms, you can add this sms to items

 items.Add((messageId + (","
                        + (threadId + (","
                        + (address + (","
                        + (name + (","
                        + (date + (" ,"
                        + (msg + (" ," + type)))))))))))));

Note:

When we check the following function ,we will find the data parameter type is IList<T> objects,so we can also use ArrayAdapter normally.

   public ArrayAdapter(Context context, int textViewResourceId, IList<T> objects);

Answer 2

User379094 posted

hi jezh

In the beginning, I thank you for your response

The first issue has been resolved and I have a second problem, why does the code not work with versions 5 or higher?

Answer 3

User371688 posted

why does the code not work with versions 5 or higher?

What code are you talking about by the words the code? Could you please elaborate on your issue?

BTW, If you think my answer is correct or useful, could you please mark it as an answer?

Answer 4

User379094 posted

whay The code does not work on Android versions higher than 5 .

Answer 5

User371688 posted

Have you added the runtime permission? An app that targets Android 6.0 or higher must always perform a runtime permission check.

Answer 6

User379094 posted

code work don in android 4.4 and less . and does not work on Android versions higher than 5 .

Answer 7

User371688 posted

I tested the code on my emulator (android 8.1), it works properly. The result is:

You can get the test demo in the attachment.

The inbox screenshot is:

Answer 8

User379094 posted

thanks jezh