Java Can';t清除或向列表中添加数据-不支持操作异常
我一直在开发一个搜索功能,它可以让我在我的RecyclerView中搜索数据。当我点击搜索图标时,我的应用程序崩溃。经过一些调试,我发现问题,似乎无法清除或添加信息到一个新的列表 AdapterClass.javaJava Can';t清除或向列表中添加数据-不支持操作异常,java,android,Java,Android,我一直在开发一个搜索功能,它可以让我在我的RecyclerView中搜索数据。当我点击搜索图标时,我的应用程序崩溃。经过一些调试,我发现问题,似乎无法清除或添加信息到一个新的列表 AdapterClass.java public class JobAdapter extends RecyclerView.Adapter<JobAdapter.ViewHolder> implements Filterable { private OnJobClickListener mLis
public class JobAdapter extends RecyclerView.Adapter<JobAdapter.ViewHolder> implements Filterable {
private OnJobClickListener mListener;
private List<Job> jobs;
private List<Job> jobsListFiltered;
private static final String LOG_TAG = JobAdapter.class.getName();
public interface OnJobClickListener {
void onJobClick(Job job);
}
public void setOnItemClickListener(OnJobClickListener listener) {
mListener = listener;
}
// Provide a reference to the views for each data item
// Provide access to all the views for a data item in a view holder
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView jobTitle;
public TextView companyName;
public TextView datePosted;
public ImageView companyLogo;
public View layout;
public ViewHolder(View itemView) {
super(itemView);
layout = itemView;
jobTitle = layout.findViewById(R.id.textView_job_title);
companyName = layout.findViewById(R.id.textView_company_name);
datePosted = layout.findViewById(R.id.textView_date);
companyLogo = layout.findViewById(R.id.imageViewLogo);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mListener != null) {
int position = getAdapterPosition();
if (position != RecyclerView.NO_POSITION) {
Job currentJob = jobs.get(position);
mListener.onJobClick(currentJob);
}
}
}
});
}
}
// Job constructor
public JobAdapter(List<Job> job, OnJobClickListener listener) {
jobs = job.subList(1, job.size());
this.mListener = listener;
jobsListFiltered = new ArrayList<>(job);
}
// Create new views (invoked by the layout manager)
@Override
public JobAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
// create a new view
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View v = inflater.inflate(R.layout.job_item_row, parent, false);
// set the view's size, margins, paddings and layout parameters
ViewHolder vh = new ViewHolder(v);
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
// Get element from the dataset at this position
// Replace the contents of the view with that element
Job currentJob = jobs.get(position);
String mJobTitle = currentJob.getJobTitle();
holder.jobTitle.setText(mJobTitle);
String mCompanyName = currentJob.getCompanyName();
holder.companyName.setText(mCompanyName);
Context context = holder.datePosted.getContext();
Date mDatePosted = currentJob.getDatePosted();
String dateFormat = formatDayMonth(context, mDatePosted);
holder.datePosted.getContext();
holder.datePosted.setText(dateFormat);
String mCompanyLogo = currentJob.getCompanyLogo();
RequestOptions requestOptions = new RequestOptions()
.placeholder(R.drawable.ic_launcher_foreground)
.circleCrop();
Glide.with(context)
.load(mCompanyLogo)
.apply(requestOptions)
.into(holder.companyLogo);
}
@Nullable
public static String formatDayMonth (@NonNull Context context, @Nullable Date date){
if (date == null) {
return null;
}
SimpleDateFormat sdf = new SimpleDateFormat(
context.getString(R.string.format_date),
Locale.US);
return sdf.format(date);
}
public int getItemCount () {
return (jobs != null) ? jobs.size() : 0;
}
@Override
public Filter getFilter() {
return jobFilter;
}
private Filter jobFilter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
List<Job> filteredList = new LinkedList<>();
if (constraint == null || constraint.length() == 0) {
filteredList.addAll(jobsListFiltered);
} else {
String filterPattern = constraint.toString().toLowerCase().trim();
for (Job job : jobsListFiltered) {
if (job.getJobTitle().toLowerCase().contains(filterPattern)) {
filteredList.add(job);
}
}
}
FilterResults results = new FilterResults();
results.values = filteredList;
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
jobs.clear();
jobs.addAll((LinkedList)results.values);
notifyDataSetChanged();
}
};
}
公共类JobAdapter扩展了RecyclerView。适配器实现可筛选{
私有OnJobClickListener多侦听器;
私人名单工作;
私有列表作业列表过滤;
私有静态最终字符串LOG_TAG=JobAdapter.class.getName();
JobClickListener上的公共接口{
void onjob单击(作业);
}
public void setOnItemClickListener(OnJobClickListener侦听器){
mListener=监听器;
}
//提供对每个数据项的视图的引用
//提供对视图保持架中数据项的所有视图的访问
公共类ViewHolder扩展了RecyclerView.ViewHolder{
公共文本查看职务;
公共文本视图公司名称;
公共文本视图已发布;
公共影像公司;
公众视野布局;
公共视图持有者(视图项视图){
超级(项目视图);
布局=项目视图;
jobTitle=layout.findViewById(R.id.textView\u job\u title);
companyName=layout.findviewbyd(R.id.textView\u company\u name);
datePosted=layout.findViewById(R.id.textView\u日期);
companyLogo=layout.findViewById(R.id.imageViewLogo);
itemView.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图){
if(mListener!=null){
int position=getAdapterPosition();
如果(位置!=RecyclerView.无位置){
Job currentJob=jobs.get(位置);
mListener.onjob单击(当前作业);
}
}
}
});
}
}
//作业构造函数
PublicJobAdapter(列表作业、OnJobClickListener侦听器){
jobs=job.subList(1,job.size());
this.mListener=侦听器;
jobsListFiltered=new ArrayList(作业);
}
//创建新视图(由布局管理器调用)
@凌驾
public JobAdapter.ViewHolder onCreateViewHolder(视图组父级,int-viewType){
//创建新视图
LayoutInflater充气器=LayoutInflater.from(parent.getContext());
视图v=充气机。充气(R.layout.job\u item\u行,父项,false);
//设置视图的大小、边距、填充和布局参数
视窗支架vh=新视窗支架(v);
返回vh;
}
//替换视图的内容(由布局管理器调用)
@凌驾
公共无效onBindViewHolder(ViewHolder,int位置){
//在此位置从数据集中获取元素
//用该元素替换视图的内容
Job currentJob=jobs.get(位置);
字符串mJobTitle=currentJob.getJobTitle();
holder.jobTitle.setText(mJobTitle);
字符串mCompanyName=currentJob.getCompanyName();
holder.companyName.setText(mCompanyName);
Context Context=holder.datePosted.getContext();
Date mDatePosted=currentJob.getDatePosted();
字符串dateFormat=formatDayMonth(上下文,mDatePosted);
holder.datePosted.getContext();
holder.datePosted.setText(日期格式);
字符串mCompanyLogo=currentJob.getCompanyLogo();
RequestOptions RequestOptions=newrequestoptions()
.占位符(R.drawable.ic_启动器_前台)
.circleCrop();
带(上下文)滑动
.加载(mCompanyLogo)
.apply(请求选项)
.进入(持有人公司);
}
@可空
公共静态字符串formatDayMonth(@NonNull上下文,@Nullable日期){
如果(日期==null){
返回null;
}
SimpleDataFormat sdf=新SimpleDataFormat(
getString(R.string.format\u date),
(美国);
返回sdf.格式(日期);
}
public int getItemCount(){
返回(jobs!=null)?jobs.size():0;
}
@凌驾
公共过滤器getFilter(){
返回作业过滤器;
}
专用筛选器jobFilter=新筛选器(){
@凌驾
受保护的筛选器结果性能筛选(CharSequence约束){
List filteredList=新建链接列表();
if(constraint==null | | constraint.length()==0){
filteredList.addAll(作业列表过滤);
}否则{
String filterPattern=constraint.toString().toLowerCase().trim();
for(作业作业:作业已筛选){
if(job.getJobTitle().toLowerCase().contains(filterPattern)){
filteredList.add(作业);
}
}
}
FilterResults results=新的FilterResults();
results.values=filteredList;
返回结果;
}
@凌驾
受保护的void publishResults(CharSequence约束、FilterResults结果){
jobs.clear();
jobs.addAll((LinkedList)results.values);
notifyDataSetChanged();
}
};
}
错误:
E/AndroidRuntime:致命异常:主
流程:packagename,PID:17390
java.lang.UnsupportedOperationException
在java.util.AbstractList.remove处(AbstractList.java:161)
位于java.util.AbstractList$Itr.remove(AbstractList.java:374)
位于java.util.AbstractList.removeRange(AbstractList.java:571)
位于java.util.SubList.removeRange(AbstractList.java:668)
位于java.util.AbstractList.clear(AbstractList.java
jobs = new ArrayList<>(job.subList(1, job.size()));