We can also add check boxes in Alert Dialog and we can check multiple, it is used when we want mutiple option to be selected.
Create an Object of AlertDialog
//following code will be in your activity.java file
final CharSequence[] items = {" Easy "," Medium "," Hard "," Very Hard "};
// arraylist to keep the selected items
final ArrayList seletedItems=new ArrayList();
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select The Difficulty Level");
builder.setMultiChoiceItems(items, null,
new DialogInterface.OnMultiChoiceClickListener() {
// indexSelected contains the index of item (of which checkbox checked)
@Override
public void onClick(DialogInterface dialog, int indexSelected,
boolean isChecked) {
if (isChecked) {
// If the user checked the item, add it to the selected items
// write your code when user checked the checkbox
seletedItems.add(indexSelected);
} else if (seletedItems.contains(indexSelected)) {
// Else, if the item is already in the array, remove it
// write your code when user Uchecked the checkbox
seletedItems.remove(Integer.valueOf(indexSelected));
}
}
})
// Set the action buttons
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
// Your code when user clicked on OK
// You can write the code to save the selected item here
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
// Your code when user clicked on Cancel
}
});
dialog = builder.create();//AlertDialog dialog; create like this outside onClick
dialog.show();
}
Handling the Click Events on CheckBoxes:
when a Checkbox is clocked means it is checked or unchecked obClick() method is called and the index of the selected item is passed, we can use this index to get the item which is checked
Create an Object of AlertDialog
AlertDialog dialog;
//following code will be in your activity.java file
final CharSequence[] items = {" Easy "," Medium "," Hard "," Very Hard "};// arraylist to keep the selected items
final ArrayList seletedItems=new ArrayList();
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select The Difficulty Level");
builder.setMultiChoiceItems(items, null,
new DialogInterface.OnMultiChoiceClickListener() {
// indexSelected contains the index of item (of which checkbox checked)
@Override
public void onClick(DialogInterface dialog, int indexSelected,
boolean isChecked) {
if (isChecked) {
// If the user checked the item, add it to the selected items
// write your code when user checked the checkbox
seletedItems.add(indexSelected);
} else if (seletedItems.contains(indexSelected)) {
// Else, if the item is already in the array, remove it
// write your code when user Uchecked the checkbox
seletedItems.remove(Integer.valueOf(indexSelected));
}
}
})
// Set the action buttons
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
// Your code when user clicked on OK
// You can write the code to save the selected item here
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
// Your code when user clicked on Cancel
}
});
dialog = builder.create();//AlertDialog dialog; create like this outside onClick
dialog.show();
}
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hello,
ReplyDeletethank you for your tutorial, but i have a question: whenever i open my dialog box again the checkboxes are all unchecked how can i make them keep their state ?
Hi
DeleteWhen user checkes any of the CheckBox, store or save the state of checkBox using SharedPrefference and when user open the Dialog Box fetch the saved/stored values and set the checkBox state using the saved values.
use the method
checkBox.setChecked(true) or checkBox.setChecked(false); to set the state of CheckBox
Pls let me know for more help
I am also stuck on this as well. What is "checkBox"? I have used the code you provided above and there is no "checkBox" to use "checkBox.setChecked(true)" on?
Deletehow can i save the arraylist that hold the value of checked boxes in sharedPrefference. I read your tutorial on SharedPrefference but it doesnt include ArrayList.
ReplyDelete