求解！ 如何响应多选项列表对话框选中的事件

Question

我设置了一个复选对话框，如图，我想勾选选项之后，点击“确定”之后如何能获取到所勾选的列的信息？
如图中我勾选了“选项2”，请问在点击“确定”之后如何能获取到“选项2”这个字符串信息以便保存到一个String变量中？急求解答上代码：
AlertDialog.Builder builder = new Builder(Contents.this);
builder.setTitle("勾选需要删除的RSS源");
builder.setMultiChoiceItems(new String[] {"选项1","选项2","选项3","选项4"}, null, null);
builder.setPositiveButton("确定", new android.content.DialogInterface.OnClickListener() { 
                @Override 
                public void onClick(DialogInterface dialog, int which) { 
                    dialog.dismiss(); 
                   
                } 
            });
builder.setNegativeButton("取消", null);
builder.create().show();

Answer 1

   你看下我的代码
Dialog dialog = new AlertDialog.Builder(AlertCheckbox.this)
        .setIcon(R.drawable.icon)
        .setTitle("多选框")
        .setMultiChoiceItems(R.array.alertselect,
                null,
                new DialogInterface.OnMultiChoiceClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton,
                            boolean isChecked) {
                        /* User clicked on a check box do some stuff */
                            String[] items = getResources().getStringArray(R.array.alertselect);
                                 
                                StringBuffer str = new StringBuffer();
                                str.append(isChecked);
                                Log.i("strbuff", str.length()+"");
                              new AlertDialog.Builder(AlertCheckbox.this)
                                 .setMessage("只能选择两个: " +items[whichButton]+isChecked)
                                 .show();
                           
                           
                    }
                })
        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
                    /* User clicked Yes so do some stuff */
                    String[] items = getResources().getStringArray(R.array.alertselect);
                   String n =  items[0];
                    new AlertDialog.Builder(AlertCheckbox.this)
                .setMessage("You selected: "+items[0])
                .show();
            }
        })
        .setNegativeButton("取消", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {                /* User clicked No so do some stuff */
            }
        })
        .create();
dialog.show();
    }