我有一个显示新闻的回收者视图。
新闻由name_news，image_news，time_news组成。
我从mysqldatabse获取数据。
这是我的适配器类：
public class PostAdapter2 extends RecyclerView.Adapter<PostAdapter2.ViewHolder>{
public Context c;
public FragmentManager mContext;
public ArrayList<News_data> original_items = new ArrayList<>();
public ArrayList<News_data> filtered_items = new ArrayList<>();
public ArrayList<Simplenews_data> original_items2 = new ArrayList<>();
public ArrayList<Simplenews_data> filtered_items2 = new ArrayList<>();
// ItemFilter mFilters = new ItemFilter();
public PostAdapter2(Context c, ArrayList<News_data> postList) {
this.c = c;
this.original_items = postList;
this.filtered_items = postList;
}
public PostAdapter2(FragmentManager mContext, ArrayList<Simplenews_data> postList) {
this.mContext = mContext;
this.original_items2 = postList;
this.filtered_items2 = postList;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_news, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, final int position) {
try {
final Simplenews_data post = filtered_items2.get(position);
PicassoClient.downloadImage(c, post.getImage_simplenews(), holder.image_news);
holder.txt_news_title.setText(post.getName_simplenews());
holder.txt_date.setText(post.getTime_simplenews());
holder.setItemClickListener(new ItemClickListener() {
@Override
public void onItemClick() {
Bundle x = new Bundle();
x.putString("news_title", post.getName_simplenews());
x.putString("news", post.getDesc_simplenews());
x.putString("image",post.getImage_simplenews());
x.putString("time",post.getTime_simplenews());
x.putString("date",post.getDate_simplenews());
Fragment descriptionFragment = new DescriptionFragment();
FragmentTransaction transaction = mContext.beginTransaction();
descriptionFragment.setArguments(x);
transaction.replace(R.id.framelayout, descriptionFragment).addToBackStack(null).commit();
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public int getItemCount() {
return filtered_items2.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
ItemClickListener itemClickListener;
TextView txt_news_title,txt_date;
ImageView image_news;
public ViewHolder(View itemView) {
super(itemView);
txt_news_title = (TextView) itemView.findViewById(R.id.txt_news_title);
txt_date = (TextView) itemView.findViewById(R.id.txt_timedate);
image_news = (ImageView) itemView.findViewById(R.id.image_news);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
try {
this.itemClickListener.onItemClick();
}catch (Exception e)
{
e.printStackTrace();
}
}
public void setItemClickListener(ItemClickListener itemClickListener)
{
this.itemClickListener=itemClickListener;
}
}
}
我正在使用PHP界面添加新闻。
getTime_simplenews（）包含新闻摘要时间格式：14：00
所以我想在回收者视图中显示即时新闻，而不是在之前的新闻中。
非常感谢。
更新：
public class Simplenews_data {
int id_simplenews;
String name_simplenews,image_simplenews,desc_simplenews,time_simplenews,date_simplenews;
public String getDate_simplenews() {
return date_simplenews;
}
public void setDate_simplenews(String date_simplenews) {
this.date_simplenews = date_simplenews;
}
public String getTime_simplenews() {
return time_simplenews;
}
public void setTime_simplenews(String time_simplenews) {
this.time_simplenews = time_simplenews;
}
public int getId_simplenews() {
return id_simplenews;
}
public void setId_simplenews(int id_simplenews) {
this.id_simplenews = id_simplenews;
}
public String getName_simplenews() {
return name_simplenews;
}
public void setName_simplenews(String name_simplenews) {
this.name_simplenews = name_simplenews;
}
public String getImage_simplenews() {
return image_simplenews;
}
public void setImage_simplenews(String image_simplenews) {
this.image_simplenews = image_simplenews;
}
public String getDesc_simplenews() {
return desc_simplenews;
}
public void setDesc_simplenews(String desc_simplenews) {
this.desc_simplenews = desc_simplenews;
}
片段代码：
public void parseJson2(String response) {
try {
JSONArray array = new JSONArray(response);
JSONObject jsonObject = null;
post_array2.clear();
Simplenews_data p;
for (int i = 0; i < array.length(); i++) {
jsonObject = array.getJSONObject(i);
int id_simplenews = jsonObject.getInt("id_simplenews");
String name_simplenews = jsonObject.getString("name_simplenews");
String image_simplenews = jsonObject.getString("image_simplenews");
String desc_simplenews = jsonObject.getString("desc_simplenews");
String time_simplenews = jsonObject.getString("time_simplenews");
String date_simplenews = jsonObject.getString("date_simplenews");
p = new Simplenews_data();
p.setId_simplenews(id_simplenews);
p.setName_simplenews(name_simplenews);
p.setImage_simplenews(image_simplenews);
p.setDesc_simplenews(desc_simplenews);
p.setTime_simplenews(time_simplenews);
p.setDate_simplenews(date_simplenews);
post_array2.add(p);
}
} catch (JSONException e) {
swipeRefreshLayout.setRefreshing(false);
e.printStackTrace();
}
adapter = new PostAdapter2(getFragmentManager(), post_array2);
recycler_post.setAdapter(adapter);
swipeRefreshLayout.setRefreshing(false);
}
答案 0 :(得分：1)
我已更新您的模型类并实现了Comparable
public class Simplenews_data implements Comparable<Simplenews_data> {
int id_simplenews;
String name_simplenews,image_simplenews,desc_simplenews,time_simplenews,date_simplenews;
public String getDate_simplenews() {
return date_simplenews;
}
public void setDate_simplenews(String date_simplenews) {
this.date_simplenews = date_simplenews;
}
public String getTime_simplenews() {
return time_simplenews;
}
public void setTime_simplenews(String time_simplenews) {
this.time_simplenews = time_simplenews;
}
public int getId_simplenews() {
return id_simplenews;
}
public void setId_simplenews(int id_simplenews) {
this.id_simplenews = id_simplenews;
}
public String getName_simplenews() {
return name_simplenews;
}
public void setName_simplenews(String name_simplenews) {
this.name_simplenews = name_simplenews;
}
public String getImage_simplenews() {
return image_simplenews;
}
public void setImage_simplenews(String image_simplenews) {
this.image_simplenews = image_simplenews;
}
public String getDesc_simplenews() {
return desc_simplenews;
}
public void setDesc_simplenews(String desc_simplenews) {
this.desc_simplenews = desc_simplenews;
}
@Override
public int compareTo(MyObject o) {
Date newDate = formatDateTime(o.getTime_simplenews(), "HH:mm", "YYYY-MM-DD HH:mm");
Date inputDate = formatDateTime(getTime_simplenews(), "HH:mm", "YYYY-MM-DD HH:mm");
return inputDate.compareTo(newDate);
}
public Date formatDateTime(String date, String fromFormat, String toFormat) {
Date d = null;
try {
d = new SimpleDateFormat(fromFormat, Locale.US).parse(date);
} catch (ParseException e) {
e.printStackTrace();
}
return new SimpleDateFormat(toFormat, Locale.US).parse(d);
}
}
使用以下代码对列表进行排序
Collections.sort(yourList);