Multiple choice AlertDialog with custom Adapter

问题:

I am trying to create a AlertDialog with multiple choice option. I have tried with the setMultiChoiceItems but what i have is a ArrayList<Category> and not a CharSequence so i tried with the adapter.

The problem with setAdapter is that when i select one item it closes the dialog window. And what i want is to select the items and then hit the OK button to see what items where selected.

AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Pick a color");
        ArrayAdapter<Category> catsAdapter = new ArrayAdapter<Category>(this, android.R.layout.select_dialog_multichoice,this.categories);
        builder.setAdapter(catsAdapter, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int item) {

            }
        });
        builder.setPositiveButton("Save", new DialogInterface.OnClickListener() {
               @Override
               public void onClick(DialogInterface dialog, int which) {
                //do something  
               }                
        });;

        AlertDialog alert = builder.create();
        alert.show();

回答1:

Unfortunately, there doesn't seem to be an easy way to toggle on AlertDialog's multichoicemode without calling setMultiChoiceItems().

However, you can set an adapter, then turn on multichoice mode in the contained ListView itself.

final AlertDialog dialog = new AlertDialog.Builder(getActivity())
    .setTitle("Title")
    .setAdapter(yourAdapter, null)
    .setPositiveButton(getResources().getString(R.string.positive), null)
    .setNegativeButton(getResources().getString(android.R.string.cancel), null)
    .create();

dialog.getListView().setItemsCanFocus(false);
dialog.getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
dialog.getListView().setOnItemClickListener(new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view,
        int position, long id) {
        // Manage selected items here
        System.out.println("clicked" + position);
        CheckedTextView textView = (CheckedTextView) view;
        if(textView.isChecked()) {

        } else {

        }
    }
});

dialog.show();

回答2:

this will stop ur dialog from disappearing after one selection.

AlertDialog alertDialog = builder.create();
ListView listView = alertDialog.getListView();
listView.setOnItemClickListener(new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> parent, View view,
            int position, long id) {
        // TODO Auto-generated method stub

    }
});

To get which items are selected , you need to plan your adapter accordingly.

回答3:

see below code it may help you. i used this in my app.

public static ArrayList<String> Party_list_new = new ArrayList<String>();

ArrayList<String> party_multi_cheked = new ArrayList<String>();

public void show_alert() {

        final Dialog dia = new Dialog(this);
        dia.setContentView(R.layout.alert_);
        dia.setTitle("Select File to import");
        dia.setCancelable(true);

        final ListView list_alert = (ListView) dia
                .findViewById(R.id.alert_list);

        list_alert.setAdapter(new ArrayAdapter<String>(getApplicationContext(),
                android.R.layout.simple_list_item_multiple_choice,
                Party_list_new));

        list_alert.setItemsCanFocus(false);
        list_alert.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        list_alert.setOnItemClickListener(new OnItemClickListener() {

            public void onItemClick(AdapterView<?> arg0, View arg1, int pos,
                    long arg3) {

            }
        });

        Button btn = (Button) dia.findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {

                SparseBooleanArray positions = list_alert
                        .getCheckedItemPositions();
                int j = 0;

                for (int k = 0; k < Party_list_new.size(); k++) {
                    if (positions.get(k)) {

                        party_multi_cheked.add("" + k);


                    }
                }

                dia.dismiss();
            }
        });
        dia.show();

    }

alert_list.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/linearLayout1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >
         <Button
            android:id="@+id/button1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Select Party" />

        <ListView
            android:id="@+id/alert_list"
            android:layout_width="match_parent" android:padding="5dp"
            android:layout_height="wrap_content" >
        </ListView>

    </LinearLayout>

make it right if it is correct.