I have three activities ( rectangle, circle, triangle) and I have tried everything to connect these activities together in my Main_Activity so when I click on one of them it would bring up their xml.file. I seem to be missing something. I tired for 2 days now...very frustrated.

.setMultiChoiceItems(items, itemsChecked,
new DialogInterface.OnMultiChoiceClickListener() {
public void onClick(DialogInterface dialog,
int which, boolean isChecked) {
switch (which) {
case 1:
startActivity(new Intent(getApplicationContext(), Rectangle_Activity.class));
break;