- Kalimuthu Rengaswamy
Dialog
box is one of the most interesting feature in Android. The style and
way making it appear depents upon the type of dialog box used and how
well we customize it. This blog explains how to create a list of
selectable items in an alert dialog box.
Dialog
class in Android
Dialog
class has 4 sub classes
1.
AlertDialog
2.
ProgressDialog : A dialog that displays a progress wheel or
progress bar.
3.
DatePickerDialog : A dialog that allows the user to select a
date.
4.
TimePickerDialog : A dialog that allows the user to select a
time.
Alert dialog
Alert dialog as the name
simplies shows an alert to the user. It can manage at the maximum of
3 buttons, a selectable list of items that can even include multiple
choice.
Features of alert
dialog
1. A title
2. A text message
3. One, two, or three
buttons
4. A list of selectable
items (with optional checkboxes or radio buttons)
Creating alert dialog
Single choice alert:
//
this declare in golbal value
public
int
postion
final
AlertDialog.Builder singlechoicedialog = new
AlertDialog.Builder(this);
final
CharSequence[] Report_items = { "Choice
I", "Choice
II", "Choice
III","Choice
IV", "Choice
V" };
singlechoicedialog.setTitle("SingleChoice
Dialog ");
singlechoicedialog.setSingleChoiceItems(Report_items,
-1,
new
DialogInterface.OnClickListener() {
public
void
onClick(DialogInterface dialog, int
item) {
postion
= item;
//
get selected value
String
value = Report_items[item].toString()
System.out.println("Selected
position::" + value);
dialog.cancel();
}
});
AlertDialog
alert_dialog = singlechoicedialog.create();
alert_dialog.show();
//
set defult select value
alert_dialog.getListView().setItemChecked(postion,
true);
Multi choice alert:
final
CharSequence[] dilogList = { "Choice
One", "Choice
Two", "Choice
Three" };
AlertDialog.Builder
multChoiceDialog = new
AlertDialog.Builder(this);
//set
title for aleart box
multChoiceDialog.setTitle("MultiChoice
Dialog");
boolean[]
_selections = new
boolean[dilogList.length];
multChoiceDialog.setMultiChoiceItems(dilogList,
_selections, new
DialogInterface.OnMultiChoiceClickListener() {
public
void
onClick(DialogInterface dialog,
int
whichButton, boolean
isChecked) {
}
});
//
add positive button here
multChoiceDialog.setPositiveButton("OK",new
DialogInterface.OnClickListener() {
@Override
public
void
onClick(DialogInterface dialog, int
which) {
//
getting listview from alert box
ListView list = ((AlertDialog)
dialog).getListView();
StringBuilder sb = new
StringBuilder();
for
(int
i = 0; i < list.getCount(); i++) {
boolean
checked = list.isItemChecked(i);
//
get checked list value
if
(checked) {
if
(sb.length() > 0)
sb.append(",");
sb.append(list.getItemAtPosition(i));
}
}
Toast.makeText(getApplicationContext(),"Selected
digit:"
+sb.toString(),Toast.LENGTH_SHORT).show();
}
});
//
add negative button
multChoiceDialog.setNegativeButton("Cancel",
new
DialogInterface.OnClickListener() {
@Override
public
void
onClick(DialogInterface dialog, int
which) {
//
cancel code here
}
});
AlertDialog
alert1 = multChoiceDialog.create();
alert1.show();
List alert:
final
AlertDialog.Builder menuAleart = new AlertDialog.Builder(FiltterlistActivity.this);
final
String[] menuList = { "function1",
"function2"
};
menuAleart.setTitle("list
dialog");
menuAleart.setItems(menuList,new
DialogInterface.OnClickListener() {
public
void
onClick(DialogInterface dialog, int
item) {
switch
(item) {
case
0:
//
function 1 code here
break;
case
1:
//
function 2 code here
break;
}
}
});
AlertDialog
menuDrop = menuAleart.create();
menuDrop.show();
Here, I have picked a single
feature of alert dialog and explained. You can just copy, paste and
execute the code for the results.
