java – inflater.inflate在Adapter getview方法中给出nullpoint
发布时间:2020-12-15 04:17:04 所属栏目:Java 来源:网络整理
导读:在我的 Android应用程序中,我正在构建我的第一个自定义适配器我现在遇到一个nullpointer在我膨胀convertView的行.请参阅以下代码: private ListString possibilitiesList = new ArrayListString();public void setPossibilitiesList(ListString possibiliti
在我的
Android应用程序中,我正在构建我的第一个自定义适配器我现在遇到一个nullpointer在我膨胀convertView的行.请参阅以下代码:
private List<String> possibilitiesList = new ArrayList<String>(); public void setPossibilitiesList(List<String> possibilitiesList) { for (String possibility : possibilitiesList) { addItem(possibility); } } public void addItem (final String item) { possibilitiesList.add(item); notifyDataSetChanged(); } private LayoutInflater inflater; @Override public View getView(final int position,View convertView,ViewGroup viewGroup) { Log.e(this,"is called here!!"); ViewHolder holder = new ViewHolder(); convertView = inflater.inflate(R.layout.list_item_posibility,viewGroup,false); holder.possibilityTitle = (TextView) convertView.findViewById(R.id.text_possibility); holder.possibilityTitle.setText(possibilitiesList.get(position)); return convertView; } 在我的片段中,我将possibilitiesList设置如下: List<String> list = Arrays.asList(getResources().getStringArray(R.array.the_possibilities)); Log.e(this,new Integer(list.size()).toString()); // outputs 8 adapter.setPossibilitiesList(list); 我100%确定list_item_posibility.xml存在(Android Studio也突出显示是存在的),所以我很遗憾为什么这会给出一个nullpointer. 有谁知道我在这里做错了什么? 解决方法
private LayoutInflater inflater;刚刚宣布未初始化
您需要将上下文传递给适配器类的构造函数,然后使用它来初始化inflater. new Yourcustomadapter(ActivityName.this); // pass the context here and other params 然后 private LayoutInflater inflater; public Yourcustomadapterr(Context context) { inflater = LayoutInflater.from(context); } 还检查一下 http://developer.android.com/reference/android/view/View.html#getContext() (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |