リストビューの各項目 (TextView 内) にカウントダウン タイマーを表示し、1 秒ごとに更新します。すべてのアイテムには独自の正しいタイマーがあるため、完全に機能します。しかし、リストビューが長くなり、上下にスクロールする必要があるときはいつでも、アイテムが混乱し、最初の非表示アイテムに彼のタイマーではなく最初のアイテムのタイマーが表示されるため、何が起こっているのかを理解するのはかなり混乱します. リストビューのリサイクラーと関係があることは知っていますが、これがリストビューの仕組みです。しかし、私はこの問題を解決する必要があり、方法がわかりません。
また、ステートメントを削除すると、if(convertView == null)修正されます。しかし、スクロールするとリストビューの読み込みが非常に遅くなります。
私が使用しているカスタムアダプターは次のとおりです。
public class TicketAdapter extends ArrayAdapter<TicketModel> implements View.OnClickListener{
private ArrayList<TicketModel> dataSet;
Context mContext;
// View lookup cache
private class ViewHolder {
TextView txtName;
TextView txtType;
TextView txtTempsRestant;
TextView txtDate;
TextView txtSLA;
ImageView info;
RelativeLayout layout;
Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
Bundle bundle = msg.getData();
long timeLeftMS = bundle.getLong("time");
int day = (int) ((timeLeftMS / (24*3600000)));
int hour = (int) ((timeLeftMS / (1000*60*60)) % 24);
int minute = (int) ((timeLeftMS / (60000)) % 60);
int second = (int)timeLeftMS % 60000 / 1000;
String timeLeftText = "";
if (day<10) timeLeftText += "0";
timeLeftText += day;
timeLeftText += ":";
if (hour<10) timeLeftText += "0";
timeLeftText += hour;
timeLeftText += ":";
if (minute<10) timeLeftText += "0";
timeLeftText += minute;
timeLeftText += ":";
if (second<10) timeLeftText += "0";
timeLeftText += seconde;
txtTempsRestant.setText(timeLeftText); //----- This is where I'm updating my textview every second ------
}
};
Handler handlerLate = new Handler(){
@Override
public void handleMessage(Message msg) {
Bundle bundle = msg.getData();
long time = bundle.getLong("time");
if (time == -1){
txtTempsRestant.setText("Ancient version");
txtTempsRestant.setTextColor(Color.parseColor("#434343"));
}
else {
txtTempsRestant.setText("Late");
txtTempsRestant.setTextColor(Color.parseColor("#434343"));
layout.setBackgroundColor(Color.parseColor("#3caa0000"));
info.setImageResource(R.drawable.haute);
}
}
};
Handler handlerFinishLate = new Handler(){
@Override
public void handleMessage(Message msg) {
Bundle bundle = msg.getData();
String Nom = bundle.getString("name");
String idTicket = bundle.getString("id");
txtTempsRestant.setText("Late");
txtTempsRestant.setTextColor(Color.parseColor("#434343"));
layout.setBackgroundColor(Color.parseColor("#3caa0000"));
info.setImageResource(R.drawable.haute);
}
};
Handler handlerAttente = new Handler(){
@Override
public void handleMessage(Message msg) {
txtTempsRestant.setText("En attente...");
txtTempsRestant.setTextColor(Color.parseColor("#434343"));
layout.setBackgroundColor(Color.parseColor("#949494"));
info.setImageResource(R.drawable.enattente);
}
};
public void startTimer(long timeLeftMS, String statut, final String Nom, final String idTicket) {
if(statut.equals("4")){
handlerAttente.sendEmptyMessage(0);
}
else{
if (timeLeftMS<0){
//handlerLate.sendEmptyMessage(0);
Bundle bundle = new Bundle();
bundle.putLong("time", timeLeftMS);
Message message = new Message();
message.setData(bundle);
handlerLate.sendMessage(message);
}
else{
CountDownTimer countDownTimer = new CountDownTimer(timeLeftMS, 1000) {
@Override
public void onTick(long l) {
Bundle bundle = new Bundle();
bundle.putLong("time", l);
bundle.putString("name", Nom);
bundle.putString("id", idTicket);
Message message = new Message();
message.setData(bundle);
handler.sendMessage(message);
}
@Override
public void onFinish() {
Bundle bundle = new Bundle();
bundle.putString("name", Nom);
bundle.putString("id", idTicket);
Message message = new Message();
message.setData(bundle);
handlerFinishLate.sendMessage(message);
}
}.start();
}
}
}
}
public TicketAdapter(ArrayList<TicketModel> data, Context context) {
super(context, R.layout.row_item_ticket, data);
this.dataSet = data;
this.mContext=context;
}
@Override
public void onClick(View v) {
int position=(Integer) v.getTag();
Object object= getItem(position);
TicketModel TicketModel=(TicketModel)object;
switch (v.getId())
{
case R.id.item_info:
Snackbar.make(v, "Late? : " +TicketModel.isTicketEnRetard(), Snackbar.LENGTH_LONG)
.setAction("No action", null).show();
break;
}
}
private int lastPosition = -1;
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// Get the data item for this position
TicketModel TicketModel = getItem(position);
// Check if an existing view is being reused, otherwise inflate the view
final ViewHolder viewHolder; // view lookup cache stored in tag
final View result;
long timeLeft;
String Statut;
String Nom;
String idTicket;
if (convertView == null) {
viewHolder = new ViewHolder();
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.row_item_ticket, parent, false);
viewHolder.txtName = (TextView) convertView.findViewById(R.id.titreTV);
viewHolder.txtDate = (TextView) convertView.findViewById(R.id.dateTV);
viewHolder.txtSLA = (TextView) convertView.findViewById(R.id.slaTV);
viewHolder.txtTempsRestant = (TextView) convertView.findViewById(R.id.SLARestantTV);
viewHolder.info = (ImageView) convertView.findViewById(R.id.item_info);
viewHolder.layout = (RelativeLayout) convertView.findViewById(R.id.backgroundRow);
timeLeft = Long.valueOf(TicketModel.getTempsRestantTicket());
Statut = TicketModel.getStatut();
Nom = TicketModel.getTitreTicket();
idTicket = TicketModel.getIdTicket();
result=convertView;
viewHolder.startTimer(timeLeft, Statut, Nom, idTicket);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
result=convertView;
}
viewHolder.txtName = (TextView) convertView.findViewById(R.id.titreTV);
viewHolder.txtDate = (TextView) convertView.findViewById(R.id.dateTV);
viewHolder.txtSLA = (TextView) convertView.findViewById(R.id.slaTV);
viewHolder.txtTempsRestant = (TextView) convertView.findViewById(R.id.SLARestantTV);
viewHolder.info = (ImageView) convertView.findViewById(R.id.item_info);
viewHolder.layout = (RelativeLayout) convertView.findViewById(R.id.backgroundRow);
timeLeft = Long.valueOf(TicketModel.getTempsRestantTicket());
Statut = TicketModel.getStatut();
Nom = TicketModel.getTitreTicket();
idTicket = TicketModel.getIdTicket();
lastPosition = position;
viewHolder.txtName.setText(TicketModel.getTitreTicket());
viewHolder.txtDate.setText(TicketModel.getDateTicket());
viewHolder.txtSLA.setText(TicketModel.getSlaTicket());
if (Long.valueOf(TicketModel.getTempsRestantTicket())<0){
viewHolder.txtTempsRestant.setText("Late");
}
viewHolder.layout.setBackgroundColor(getColorBG(TicketModel.isTicketEnRetard()));
viewHolder.info.setOnClickListener(this);
viewHolder.info.setTag(position);
// Return the completed view to render on screen
return convertView;
}
}