选择联系人并返回姓名或电话号码和发送短消息

以下代码参考网上代码改写，链接http://blog.csdn.net/jason0539/article/details/21855825

首先需要添加如下权限：

public class MainActivity : Activity{TextView tvPhone;protected override void OnCreate(Bundle bundle){base.OnCreate(bundle);// Set our view from the "main" layout resourceSetContentView(Resource.Layout.Main);tvPhone = FindViewById(Resource.Id.tvPhone);Button btnSend = FindViewById(Resource.Id.btnSend);btnSend.Click += delegate {  };var intent = new Intent(Intent.ActionPick, ContactsContract.Contacts.ContentUri);this.StartActivityForResult(intent, 100);}protected override void OnActivityResult(int requestCode, [GeneratedEnum] Result resultCode, Intent data){//base.OnActivityResult(requestCode, resultCode, data);if(requestCode == 100){if(data != null){//tvPhone.Text = GetName(data.Data);tvPhone.Text = GetPhone(data.Data);}}}/// 
/// 获取联系人姓名/// 
/// /// private string GetName(Android.Net.Uri uri){string result = "";var cursor = ContentResolver.Query(uri, null, null, null, null);if (cursor.Count > 0){cursor.MoveToFirst();var index = cursor.GetColumnIndex(ContactsContract.ContactsColumns.DisplayName);result = cursor.GetString(index);}return result;}/// 
/// 获取联系人手机号码/// 
/// /// private string GetPhone(Android.Net.Uri uri){string result = "";var cursor = ContentResolver.Query(uri, null, null, null, null);if (cursor.Count > 0){cursor.MoveToFirst();int phoneColumn = cursor.GetColumnIndex(ContactsContract.Contacts.InterfaceConsts.HasPhoneNumber);int phoneNum = cursor.GetInt(phoneColumn);if (phoneNum > 0){// 获得联系人的ID号  int idColumn = cursor.GetColumnIndex(ContactsContract.Contacts.InterfaceConsts.Id);String contactId = cursor.GetString(idColumn);// 获得联系人电话的cursor  ICursor phone = ContentResolver.Query(ContactsContract.CommonDataKinds.Phone.ContentUri, null,ContactsContract.CommonDataKinds.Phone.InterfaceConsts.ContactId + "="+ contactId, null, null);if (phone.MoveToFirst()){for (; !phone.IsAfterLast; phone.MoveToNext()){int index = phone.GetColumnIndex(ContactsContract.CommonDataKinds.Phone.Number);result = phone.GetString(index);}}}}return result;}

发送短消息

添加权限“SEND_SMS”。

在应用程序中使用如下方法发送短信

SmsManager.Default.SendTextMessage ("1234567890", null, "Hello from Xamarin.Android", null, null);

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