ANDROID APP

@Override
public boolean onPrepareOptionsMenu(Menu menu) {
if(itemNum>0) {
menu.setGroupVisible(GROUP_DEL, true);
} else {
menu.setGroupVisible(GROUP_DEL, false);
}
return super.onPrepareOptionsMenu(menu);
}
การสร้างและการตรวจจับอีเวนต์
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@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()) {
case MENU_ADD:
create_note();
return true;
case MENU_SEND:
send_note();
return true;
case MENU_DEL:
delete_note();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
if(v.getId() == R.id.focus_text) {
SubMenu textMenu = menu.addSubMenu("Change Text");
textMenu.add(0, ID_TEXT1, 0, choices[0]);
textMenu.add(0, ID_TEXT2, 0, choices[1]);
textMenu.add(0, ID_TEXT3, 0, choices[2]);
menu.add(0, ID_DEFAULT, 0, "Original Text");
}
}
@Override
public boolean onContextItemSelected(MenuItem item) {
switch(item.getItemId()) {
case ID_DEFAULT:
bv.setText(R.string.hello);
return true;
case ID_TEXT1:
case ID_TEXT2:
case ID_TEXT3: