Question

以下是我的AlertDialog.Builder

的代码

    final String[] values = new String[] {"Select All", "Android", "ios", "windows", "Blackberry"};
    final ArrayList<String> selecteditems = new ArrayList<String>();
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Select your favorite OS");
      builder.setMultiChoiceItems(values, null , new DialogInterface.OnMultiChoiceClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which, boolean isChecked) {

            if (isChecked) {
                selecteditems.add(String.valueOf(which));

            } else {

                selecteditems.remove(Integer.valueOf(which));
            }
        }
    })
    .setPositiveButton("OK", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();

        }
    })
    .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
           dialog.dismiss();

        }
    });

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

我想要做的是能够检测何时选中'全选'，我可以从isChecked循环中检测到。但是我希望能够在用户选中“全选”时设置要检查的所有选项，并在用户取消选中“全选”时删除检查。

Answer 1

它应该类似于以下代码。关键点是提供boolean[] checkedItems数组，并在您尝试选择全部时更新它。

checkedItems数组（因为Dialog仍然引用它。）

应为每个项目调用dialog.getListView().setItemChecked(i, true);。

items.add(0, "Select All");

boolean[] checkedItems = new boolean[items.size()];

AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
builder.setTitle(dialogTitle)
        .setMultiChoiceItems(items.toArray(new String[items.size()]), checkedItems, new DialogInterface.OnMultiChoiceClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which, boolean isChecked) {

                if(which == 0) {
                    if(isChecked) {
                        multichoiceDialog.getListView().setItemChecked(0, true);
                        checkedItems[0] = true;
                        for(int i=1; i< checkedItems.length; i++) {
                            checkedItems[i] = true;
                            multichoiceDialog.getListView().setItemChecked(i, true);
                        }

                    }
                }
            }
        })
        .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {

            }
        });

multichoiceDialog = builder.create();
multichoiceDialog.show();

在Android中的Multichoice AlertDialog中设置复选框状态

1 个答案: