您可以在这里用这个方法来发送你的信息在predefine电话号码。

 无效sendSMS（字符串phoneNumber的，字符串消息）
    {
        字符串SENT =SMS_SENT;
        字符串DELIVERED =SMS_DELIVERED;

        PendingIntent sentPI = PendingIntent.getBroadcast（此，0，
            新的意图（SENT），0）;

        PendingIntent deliveredPI = PendingIntent.getBroadcast（此，0，
            新的意图（交付），0）;

        // ---当短信已发送---
        registerReceiver（新BroadcastReceiver的（）{
            @覆盖
            公共无效的onReceive（背景为arg0，意图ARG1）{
                开关（的getResult code（））
                {
                    案例Activity.RESULT_OK：
                        Toast.makeText（getBaseContext（），短信发送
                                Toast.LENGTH_SHORT）.show（）;
                        打破;
                    案例SmsManager.RESULT_ERROR_GENERIC_FAILURE：
                        Toast.makeText（getBaseContext（），一般故障，
                                Toast.LENGTH_SHORT）.show（）;
                        打破;
                    案例SmsManager.RESULT_ERROR_NO_SERVICE：
                        Toast.makeText（getBaseContext（），无服务，
                                Toast.LENGTH_SHORT）.show（）;
                        打破;
                    案例SmsManager.RESULT_ERROR_NULL_PDU：
                        Toast.makeText（getBaseContext（），空的PDU，
                                Toast.LENGTH_SHORT）.show（）;
                        打破;
                    案例SmsManager.RESULT_ERROR_RADIO_OFF：
                        Toast.makeText（getBaseContext（），无线电关
                                Toast.LENGTH_SHORT）.show（）;
                        打破;
                }
            }
        }，新的IntentFilter（发送））;

        // ---当SMS已交付---
        registerReceiver（新BroadcastReceiver的（）{
            @覆盖
            公共无效的onReceive（背景为arg0，意图ARG1）{
                开关（的getResult code（））
                {
                    案例Activity.RESULT_OK：
                        Toast.makeText（getBaseContext（），SMS递送，
                                Toast.LENGTH_SHORT）.show（）;
                        打破;
                    案例Activity.RESULT_CANCELED：
                        Toast.makeText（getBaseContext（），短信未交付，
                                Toast.LENGTH_SHORT）.show（）;
                        打破;
                }
            }
        }，新的IntentFilter（交付））;

        SmsManager的短信= SmsManager.getDefault（）;
        sms.sendTextMessage（phoneNumber的，空，消息，sentPI，deliveredPI）;
    }
 

I have tried sending but the SMS is automatically sent without getting known. I want to send SMS with field of To to be predefined from my code and can get the inbuilt SMS APP.

My Code

holder.SMS.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                Log.e("sssssss", "aaaaaaaa");

                try {
//                  View view = (View) v.getParent();
//                  TextView number = (TextView) view.findViewById(R.id.phone);
//                  String selected_mobile_sms = number.getText().toString();
//                  Log.e("sssssss", "ssssssss" + selected_mobile_sms);

                    // sendSMS();

                    SmsManager sm = SmsManager.getDefault();
                    sm.sendTextMessage("tel:121", null, "test message", null,
                            null);


//                      
//                  
//                   Intent sendIntent = new Intent(Intent.ACTION_VIEW);
//                   sendIntent.putExtra("sms_body", "");
//                  //
//                   sendIntent.setType("vnd.android-dir/mms-sms");
//                   activity.startActivity(sendIntent);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                // TODO Auto-generated method stub

            }
        });

You can use here this method to send your message in predefine phone number.

 void sendSMS(String phoneNumber, String message)
    {      
        String SENT = "SMS_SENT";
        String DELIVERED = "SMS_DELIVERED";

        PendingIntent sentPI = PendingIntent.getBroadcast(this, 0,
            new Intent(SENT), 0);

        PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
            new Intent(DELIVERED), 0);

        //---when the SMS has been sent---
        registerReceiver(new BroadcastReceiver(){
            @Override
            public void onReceive(Context arg0, Intent arg1) {
                switch (getResultCode())
                {
                    case Activity.RESULT_OK:
                        Toast.makeText(getBaseContext(), "SMS sent", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                        Toast.makeText(getBaseContext(), "Generic failure", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_NO_SERVICE:
                        Toast.makeText(getBaseContext(), "No service", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_NULL_PDU:
                        Toast.makeText(getBaseContext(), "Null PDU", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_RADIO_OFF:
                        Toast.makeText(getBaseContext(), "Radio off", 
                                Toast.LENGTH_SHORT).show();
                        break;
                }
            }
        }, new IntentFilter(SENT));

        //---when the SMS has been delivered---
        registerReceiver(new BroadcastReceiver(){
            @Override
            public void onReceive(Context arg0, Intent arg1) {
                switch (getResultCode())
                {
                    case Activity.RESULT_OK:
                        Toast.makeText(getBaseContext(), "SMS delivered", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case Activity.RESULT_CANCELED:
                        Toast.makeText(getBaseContext(), "SMS not delivered", 
                                Toast.LENGTH_SHORT).show();
                        break;                        
                }
            }
        }, new IntentFilter(DELIVERED));        

        SmsManager sms = SmsManager.getDefault();
        sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);        
    }