Question

我需要以编程方式取消选中复选框，但检查列表在对话框中。这会改变解决方案吗？到目前为止我所拥有的：

CharSequence[] items = itemList.toArray(new CharSequence[itemList.size()]);

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select categories");

builder.setMultiChoiceItems(items, null,
new DialogInterface.OnMultiChoiceClickListener() {

public void onClick(DialogInterface dialog, int which, boolean isChecked) {
  if (isChecked){
    if(chosenCat.size() < 10){
      chosenCat.add(items[which].toString());
    }else{
      Toast.makeText(getApplicationContext(), "Max 10 categories to compare.",   Toast.LENGTH_SHORT).show();
      //uncheck
      items.isChecked = false; // --> wrong
      chosenCat.remove(items[which].toString());
    }
  }else{
    chosenCat.remove(items[which].toString());
  }
}
});

Answer 1

我错过了这一行

((AlertDialog) dialog).getListView().setItemChecked(which, false);

后

checkboxStatusArray[1] = false;

Answer 2

将boolean[]传递到builder.setMultiChoiceItems，表示已分别添加的复选框的复选框状态（已选中/未选中）。请尝试此示例代码

boolean[] checkboxStatusArray = {true,false};

CharSequence[] items = itemList.toArray(new CharSequence[itemList.size()]);
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Select categories");

builder.setMultiChoiceItems(items, checkboxStatusArray,
new DialogInterface.OnMultiChoiceClickListener() {

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


                      checkboxStatusArray[1] = true;//This line will enable second check box



     }
 });

builder.show();

以编程方式取消选中AlertDialog检查列表框

2 个答案: