Question

I have created a button. So when I click the button it gives me an option to send message and the view of the contact list.
Thank you.

Answer 1

inside the onClick() of your button,launch the sms activity :

Intent sendIntent = new Intent(Intent.ACTION_VIEW);         
sendIntent.setData(Uri.parse("sms:"));

startActivity(sendIntent);

You can add extras to populate your own message and such like this

sendIntent.putExtra("sms_body", x); 

One more way is :

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setType("vnd.android-dir/mms-sms");
startActivity(intent);

If b is your button then :

b.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        Intent sendIntent = new Intent(Intent.ACTION_VIEW);         
        sendIntent.setData(Uri.parse("sms:"));

        startActivity(sendIntent);  
    }
});