Apps send a message via whatsapp automatically with android program

[PIT32]

I'm trying to send a message via whatsapp it automatically, I think part of the code is correct, because achievement retrieve the name of the contact that you want to send, but I skip a "Debug Current Instruction Pointer" in a method that no is that it serves, was "instrumentation.class" and is the method

public final boolean queueIdle ()
{
 synchronized (msync)
 {
  mWaitingActivities.remove (mWaiter);
  mSync.notifyAll ();
 }
 return false;
}

my code is as follows:

public void onClickWhatsApp (View v)
{
 Cursor c = getContentResolver().query(ContactsContract.Data.CONTENT_URI,
 		 new String[] { ContactsContract.Contacts.Data._ID },
		 ContactsContract.Data.DATA1 + "=?",
		 new String[] { "mynumber@s.whatsapp.net" }, null);
 if (c==null)
 {
  tV1.setText("nll");
 }

 c.moveToFirst();
 if (c!=null)
 { 
  tV1.setText(c.getString(0));
 }

 Intent i = new   Intent(Intent.ACTION_SENDTO, Uri.parse("content://com.android.contacts/data/" + c.getString(0)));
 i.setType("text/plain");
 String text = "my txt";
 i.setPackage("com.whatsapp"); // so that only Whatsapp reacts and not the chooser
 i.putExtra(Intent.EXTRA_TEXT, text);
 startActivity(i);
 c.close();             
}

thanks