expandableListVIew 问题 求解决

Question

expandableListView，group和child都是动态生成的，每一个child都是自己写的layout，例如：一个child为一个RadioGroup，点击一个radiobutton 其值显示在group的textview中 现在出现一个问题 点击了能显示，但是当点击另一个groupItem时 报空指针异常，或者点击其他group时，在点击写好的radioGroup那个groupItem报空指针异常 我的代码如下：
else if (groupPosition == 1) {
            // 单选框
            if (convertView == null)
                convertView = mChildInflater.inflate(R.layout.time_settings_layout,null);
            final RadioGroup radioGroup = (RadioGroup) convertView.findViewById(R.id.timesetting);
            final RadioButton radioButton1 = (RadioButton) convertView.findViewById(R.id.threesecond);
            final RadioButton radioButton2 = (RadioButton) convertView.findViewById(R.id.fivesecond);
            final RadioButton radioButton3 = (RadioButton) convertView.findViewById(R.id.sevensecond);
            final List<RadioButton> radios = new ArrayList<RadioButton>();
            
            radios.add(radioButton1);
            radios.add(radioButton2);
            radios.add(radioButton3);
            
            radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId) {
                    // TODO Auto-generated method stub
                    for(int i = 0; i < radios.size(); i++){
                     if(radios.get(i).getId() == checkedId){
                     getGroup(1).setDownMessage(radios.get(i).getText().toString());
                     notifyDataSetChanged();
                     }
                 }
                }   
                
            });
            return convertView;报错：12-18 10:35:55.920: ERROR/AndroidRuntime(8722):     at com.cn.adapter.SettingListAdapter.getChildView(SettingListAdapter.java:222)
12-18 10:35:55.920: ERROR/AndroidRuntime(8722):     at android.widget.ExpandableListConnector.getView(ExpandableListConnector.java:450)
12-18 10:35:55.920: ERROR/AndroidRuntime(8722):     at android.widget.AbsListView.obtainView(AbsListView.java:2012)
。。求指点啊 谢谢

Answer 1

radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() 报错  求大神看看呀。不甚感激

Answer 2

SettingListAdapter.java这个文件贴出来看看呢，系统提示它222行报错，所以麻烦把222行标红。

Answer 3

问题很明显啊这个地方是null的。。是不是没有取得ID啊radioGroup

Answer 4

         radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId) {
                    // TODO Auto-generated method stub
                    for(int i = 0; i < radios.size(); i++){
                     if(radios.get(i).getId() == checkedId){
                         String radioText = radios.get(i).getText().toString();
                     getGroup(1).setDownMessage(radioText);
                     notifyDataSetChanged();
                     }
                 }
                }   
                
            });
            return convertView;
SettingListAdapter.java有点大 目前数据都在里面

Answer 5

else if (groupPosition == 1) {
            // 单选框
            if (convertView == null)
                convertView = mChildInflater.inflate(R.layout.time_settings_layout,null);
            final RadioGroup radioGroup = (RadioGroup) convertView.findViewById(R.id.timesetting);
            final RadioButton radioButton1 = (RadioButton) convertView.findViewById(R.id.threesecond);
            final RadioButton radioButton2 = (RadioButton) convertView.findViewById(R.id.fivesecond);
            final RadioButton radioButton3 = (RadioButton) convertView.findViewById(R.id.sevensecond);
            final List<RadioButton> radios = new ArrayList<RadioButton>();
            
            radios.add(radioButton1);
            radios.add(radioButton2);
            radios.add(radioButton3);
            
System.out.println("RadioGroup......");
            radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId) {
                    // TODO Auto-generated method stub
                    for(int i = 0; i < radios.size(); i++){
                     if(radios.get(i).getId() == checkedId){
                         String radioText = radios.get(i).getText().toString();
                     getGroup(1).setDownMessage(radioText);
                     notifyDataSetChanged();
                     }
                 }
                }   
                
            });
            return convertView;
            报错行红色标注了

Answer 6

  关注下：final RadioGroup radioGroup = (RadioGroup) convertView.findViewById(R.id.timesetting);
有没有执行！

Answer 7

能到找到其ID 可能上面我没有说清楚：紧紧点击groupposition = 1 时 没问题的，当点击了groupposition =2 时 再点击 groupposition =1 报错 

Answer 8

你这里指定义了一个RadioGroup啊，应该循环添加吧？

Answer 9

循环添加是指？ 我是将radiobutton一起加进RadioGroup中 ，监听的radiogroup的CheckedChange。。 找不出原因啊

Answer 10

我纳闷为什么你想着在adapter里面监听事件呢？

Answer 11

太乱了无从下手也怪我掌握的不狗深刻
建议你按照它运行的流程，一步步的观察，多用sysout打印一些信息，学长只能帮你到这儿了，不好意思！~