Button btnS = (Button) findViewById(R.id.btnSms);
btnS.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        
    }
});

<Button android:layout_width="60dp"
        android:layout_height="60dp"
        android:layout_below="@+id/textView"
        android:layout_toLeftOf="@id/btnSms"
        android:layout_marginRight="20dp"
        android:layout_marginTop="10dp"
        android:id="@+id/btnCall"
        android:background="@android:drawable/sym_call_outgoing"/>

((Button) findViewById(R.id.btnCall)).setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:09111111111"));
        startActivity(intent);
    }
});