在android对话框中的setMultiChoiceItems中以编程方式检查项目

Question

我在对话框中使用选中的ListView。我可以将所有已检查的项目存储起来，如下所示：

builder.setMultiChoiceItems(arr, 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) {
                    brandNameIDMap.put(brandList.getItem(indexSelected).getProductID(), brandList.getItem(indexSelected).getProductName());
                    //Log.i("ID", "onClick: "+brandList.getItem(indexSelected).getProductID());
                    //seletedItems.add(indexSelected);
                } else{
                    brandNameIDMap.remove(brandList.getItem(indexSelected).getProductID());
                }
            }
        });

问题： 现在我想重新打开Dialog，并且需要自动选择之前选择的项目。我怎么能这样做？

Answer 1

创建一个数组

Boolean checked[] = new Boolean[arr.size()];

然后检查任何项目，将其添加到数组中。

 builder.setMultiChoiceItems(arr, checked,
            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) {
                        checked[indexSelected]=true;
                        brandNameIDMap.put(brandList.getItem(indexSelected).getProductID(), brandList.getItem(indexSelected).getProductName());
                        //Log.i("ID", "onClick: "+brandList.getItem(indexSelected).getProductID());
                        //seletedItems.add(indexSelected);
                    } else{
                        checked[indexSelected]=false;
                        brandNameIDMap.remove(brandList.getItem(indexSelected).getProductID());
                    }
                }
            });