我需要在时间到期时删除一个项目,部分我通过引用这个 How to handle multiple countdown timers in ListView? 得到了输出
滚动列表后,一些时间过期的项目没有被移除,时间也没有更新。
package com.techno.deliveryboy.Adapter;
import android.os.Handler;
import android.support.v4.app.FragmentActivity;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.techno.deliveryboy.Pojos.DummyTimer;
import com.techno.deliveryboy.R;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
/**
* Created by developer on 23/7/16.
*/
public class Incoiming_orders_Adapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private LayoutInflater lf;
Boolean onBind = true;
private List<MyViewHolder> lstHolders;
ArrayList<Integer> unbindvalues=new ArrayList<>();
private Handler mHandler = new Handler();
List<DummyTimer> lstProducts=new ArrayList<>();
private Runnable updateRemainingTimeRunnable = new Runnable() {
@Override
public void run() {
synchronized (lstHolders) {
long currentTime = System.currentTimeMillis();
for (MyViewHolder holder : lstHolders) {
holder.updateTimeRemaining(currentTime);
}
}
}
};
public Incoiming_orders_Adapter(FragmentActivity activity, List<DummyTimer> lstProduct) {
lstHolders = new ArrayList<>();
lstProducts=lstProduct;
startUpdateTimer();
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.incoming_orders_item, parent, false);
return new MyViewHolder(itemView);
}
private void startUpdateTimer() {
Timer tmr = new Timer();
tmr.schedule(new TimerTask() {
@Override
public void run() {
mHandler.post(updateRemainingTimeRunnable);
}
}, 1000, 1000);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if(holder instanceof MyViewHolder){
onBind=true;
MyViewHolder holder1= (MyViewHolder) holder;
synchronized (lstHolders) {
lstHolders.add(holder1);
}
holder1.setData(lstProducts.get(position),position);
onBind=false;
}
}
@Override
public int getItemCount() {
return lstProducts.size();
}
public void removeAt(int position) {
/* for (Iterator<MyViewHolder> iterator = lstHolders.iterator(); iterator.hasNext();) {
iterator.remove();
}*/
if(!onBind) {
if(unbindvalues!=null&&unbindvalues.size()!=0&&position>=0){
for (Integer i:unbindvalues) {
lstProducts.remove(position);
notifyItemRemoved(position);
}
unbindvalues.clear();
}else {
if(position>=0){
lstProducts.remove(position);
notifyItemRemoved(position);
}
}
notifyDataSetChanged();
}else {
System.out.println("+Bind->true+");
if(position>=0)
unbindvalues.add(position);
}
}
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView title, tvTimeRemaining, genre;
DummyTimer mProduct;
public void setData(DummyTimer item, int position) {
mProduct = item;
title.setText(item.name);
updateTimeRemaining(System.currentTimeMillis());
}
public MyViewHolder(View view) {
super(view);
title = (TextView) view.findViewById(R.id.Item_Totalvalue);
tvTimeRemaining= (TextView) view.findViewById(R.id.Item_timeout);
}
public void updateTimeRemaining(long currentTime) {
long timeDiff = mProduct.expirationTime - currentTime;
if (timeDiff > 0) {
int seconds = (int) (timeDiff / 1000) % 60;
int minutes = (int) ((timeDiff / (1000 * 60)) % 60);
int hours = (int) ((timeDiff / (1000 * 60 * 60)) % 24);
tvTimeRemaining.setText(hours + " hrs " + minutes + " mins " + seconds + " sec");
} else {
// tvTimeRemaining.setText(String.valueOf(getAdapterPosition()));
removeAt(getAdapterPosition());
}
}
}
@Override
public long getItemId(int position) {
return position;
}
}
请发表您的意见。
最佳答案
您可以通过设置 CountDownTimer
来实现此目的这将每秒触发一次 onTick()
方法。在 onTick()
方法检查是否有任何对象已过期?如果您发现任何对象,请调用 notifyItemRemoved()
将其删除。
这里是回收器 View 适配器的代码:
私有(private)类 RecyclerViewAdapter 扩展 RecyclerView.Adapter { 私有(private) ArrayList mData;
public RecyclerViewAdapter(ArrayList<RowData> data) {
mData = data;
//find out the maximum time the timer
long maxTime = System.currentTimeMillis();
for (RowData item : mData) {
maxTime = Math.max(maxTime, item.endTime);
}
//set the timer which will refresh the data every 1 second.
new CountDownTimer(maxTime - System.currentTimeMillis(), 1000) {
@Override
public void onTick(long l) {
for (int i = 0, dataLength = mData.size(); i < dataLength; i++) {
RowData item = mData.get(i);
item.timeRemaining -= 1000;
}
//remove the expired items
Iterator<RowData> dataIterator = mData.iterator();
while (dataIterator.hasNext()) {
RowData rd = dataIterator.next();
if (rd.timeRemaining <= 0) dataIterator.remove();
}
notifyDataSetChanged();
}
@Override
public void onFinish() {
mData.clear();
notifyDataSetChanged();
}
}.start();
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new MyViewHolder(LayoutInflater.from(MainActivity.this).inflate(android.R.layout.simple_list_item_2, parent, false));
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
RowData rowData = mData.get(position);
holder.titleTv.setText(rowData.title);
holder.remainingTimeTv.setText(millToMins(rowData.timeRemaining) + " mins remaining");
}
private String millToMins(long millisec) {
return millisec / (60000) + ":" + (int) (millisec/1000) % (60);
}
@Override
public int getItemCount() {
return mData.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private TextView remainingTimeTv;
private TextView titleTv;
public MyViewHolder(View itemView) {
super(itemView);
remainingTimeTv = (TextView) itemView.findViewById(android.R.id.text2);
titleTv = (TextView) itemView.findViewById(android.R.id.text1);
}
}
}
附言: 这里是完整的代码 demo在我的 GitHub 帐户上可用。
关于java - 时间到期时从 Recyclerview 中删除项目,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38561757/