Question

我有一个包含单选按钮的自定义对话框，但是当我添加一个oncheckedchangelistener时，我的应用程序崩溃了。可能是什么问题？

提前致谢！：d

这是我的代码：

--jars

这是错误跟踪：

GridViewAdapter adapter = new GridViewAdapter(alcoholType.this, images,names);
    gridView.setAdapter(adapter);
    gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                                int position, long id) {

            final Dialog dialog = new Dialog(context);
            dialog.setContentView(R.layout.alcoholdialog);
            dialog.setTitle("ORDER " + names.get(position));

            radioQuantity = (RadioGroup) findViewById(R.id.radioQuantity);
            quantity1 = (RadioButton) findViewById(R.id.quantity1);
            quantity2 = (RadioButton) findViewById(R.id.quantity2);

            radioQuantity.clearCheck();

            radioQuantity.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

                        @Override
                        public void onCheckedChanged(RadioGroup group, int checkedId) {


                        }

                    });

            dialog.show();
        }
    });

Answer 1

您需要使用Dialog's引用来获取视图：

使用：

radioQuantity = (RadioGroup) dialog.findViewById(R.id.radioQuantity);
quantity1 = (RadioButton) dialog.findViewById(R.id.quantity1);
quantity2 = (RadioButton) dialog.findViewById(R.id.quantity2);

由于您的NullPointerException未附加到视图，因此您获得RadioGroup。

同样适用于CheckedListener：

radioQuantity.setOnCheckedChangeListener(new 
   RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {

            if (checkedId == R.id.quantity1) {
                //Your code
            } else if (checkedId == R.id.quantity2) {
                //Your code
            } 

        }
    });

Answer 2

请尝试以下代码

radioQuantity = (RadioGroup) dialog.findViewById(R.id.radioQuantity);
quantity1 = (RadioButton) dialog.findViewById(R.id.quantity1);
quantity2 = (RadioButton) dialog.findViewById(R.id.quantity2);

 radioQuantity.setOnCheckedChangeListener(new 
       RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {

                if (checkedId == R.id.quantity1) {
                    Log.d("radiobox", "clickingevent");
                    optionans = "1";
                } else if (checkedId == R.id.quantity2) {

                    optionans = "2";
                } 

            }
        });

如何在自定义对话框中添加radiogroup onchecked listener

2 个答案: