Dialogue Fragment With Multiple Selection In Android

Pranav J.Dev
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Dialogues are most commonly used in Android to show some messages to the user or to get some confirmations from the user. In some cases we need to show a dialogue where a user needs to select more than one option.

There are two ways to create dialogues; they are DialogueFragment and Dialogue.Builder class. A Dialogue will normally look as shown in below,

Here I am going to describe how to display a multiple selection dialogue in an activity. For that I am using a dialogueFragment and this has the life cycle methods as onCreate(),onCreateDialogue(),onCreateView(). In the older methods onCreateDialogue() you can construct your dialogue. But with DialogueFragment you can create this on onCreateView()

I have declared a string array in the values folder that contains the options in the dialogue box

Here I have an activity, in that activity I create a button, on clicking that button it will show a dialogue with multiple options and each option has a check box a the right side of it.

For Alert dialogue I created a custom class named MyAlert that extends from DialogueFragment. And in the onCreateDialogue() please add the code

public Dialog onCreateDialog(Bundle savedInstanceState)
{
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Title here");
builder.setMultiChoiceItems(R.array.titles, null, new DialogInterface.OnMultiChoiceClickListener()
{
@Override
public void onClick(DialogInterface dialogInterface, int i, boolean b)
{
Toast.makeText(getActivity(), "item clicked at " + i, Toast.LENGTH_SHORT).show();
}
});
Dialog dialog = builder.create();
return dialog;
}

The builder.setMultiChoiceItems add the ararys which I declared earlier as the choicelist, and on selecting each option a Toast message will be displayed with the index of that option. The output will be like the following.