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我正在開發一個任務管理器應用程序。基本上與谷歌地方的API我選擇的位置保存到一個sqlite數據庫並填充它在RecyclerView。對於每個位置，我使用retrofit2和openweather api來獲取該位置的當前天氣，並將其顯示在RecyclerView中。這是在位於onBindViewHolder方法中的回收器視圖適配器中的異步任務中完成的。現在，當我創建一個任務時，它將數據傳輸到該位置，沒有任何問題。當我添加更多任務時，問題就開始了。基本上，當我使用新位置添加新任務時，它會覆蓋最近添加的任務的當前天氣，如下圖所示。RecyclerView覆蓋列表項
https://s9.postimg.org/l6tmi3wm7/Screenshot_20160830_143608.png
我怎樣才能讓這個不覆蓋以前的任務是什麼？
public class TaskAdapter extends RecyclerView.Adapter<TaskAdapter.ViewHolder> {
private List<Task> taskList;
private final String API_KEY = "8617b30a6fc114ad2ad929c111b76edf";
private final String UNITS = "metric";
private double latitude, longitude;
private Task task;
private WeatherInfo weatherInfo;
private Context context;
public class ViewHolder extends RecyclerView.ViewHolder {
private TextView taskName, destination, currentWeather;
private ImageView weatherImg;
public ViewHolder(View view) {
super(view);
taskName = (TextView) view.findViewById(R.id.task);
destination = (TextView) view.findViewById(R.id.date);
currentWeather = (TextView) view.findViewById(R.id.weather);
weatherImg = (ImageView) view.findViewById(R.id.weather_icon);
}
}
public TaskAdapter(List<Task> taskList) {
this.taskList = taskList;
}
public void add(int position, Task item) {
taskList.add(position, item);
notifyItemInserted(position);
}
public void remove(Task item) {
int position = taskList.indexOf(item);
taskList.remove(position);
notifyItemRemoved(position);
}
public Task getTask(int position) {
return taskList.get(position);
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
context = parent.getContext();
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_rv, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
task = taskList.get(position);
latitude = task.getDestinationLatitude();
longitude = task.getDestinationLongitude();
new getWeatherDataAsync(holder).execute();
holder.taskName.setText(task.getTaskName());
holder.destination.setText(task.getDestinationName());
}
@Override
public int getItemCount() {
return taskList.size();
}
private class getWeatherDataAsync extends AsyncTask<Void, Void, Void> {
private ViewHolder holder;
private ProgressDialog progressDialog;
public getWeatherDataAsync(ViewHolder holder) {
this.holder = holder;
}
@Override
protected void onPreExecute() {
progressDialog=ProgressDialog.show(context,"Loading...","Getting weather.");
}
@Override
protected Void doInBackground(Void... vHolders) {
try {
WeatherApi weatherApi = WeatherApi.retrofit.create(WeatherApi.class);
Call<WeatherInfo> call = weatherApi.getWeatherData(latitude, longitude, API_KEY, UNITS);
weatherInfo = call.execute().body();
//
} catch (IOException e) {
Log.e("get weather coordinates", "something went wrong: " + e.getMessage());
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
if (weatherInfo != null) {
holder.currentWeather.setText(String.valueOf(weatherInfo.getMain().getTemp()) + "\u2103");
getWeatherIcon(holder);
} else {
holder.currentWeather.setText("N/A \u2103");
Picasso.with(context).load("file:///android_asset/md-weather-iconset/weather-none-available.png").into(holder.weatherImg);
}
progressDialog.dismiss();
}
}
/**
* Display the correct weather icon from assets based on the data returned from the Retrofit query.
* @param viewHolder
*/
private void getWeatherIcon(ViewHolder viewHolder){
String base="file:///android_asset/md-weather-iconset";
switch (weatherInfo.getWeather().get(0).getIcon()) {
case "01d":
Picasso.with(context).load(base+"/weather-clear.png").into(viewHolder.weatherImg);
break;
case "02d":
Picasso.with(context).load(base+"/weather-few-clouds.png").into(viewHolder.weatherImg);
break;
case "03d":
Picasso.with(context).load(base+"/weather-clouds.png").into(viewHolder.weatherImg);
break;
case "04d":
Picasso.with(context).load(base+"/weather-clouds.png").into(viewHolder.weatherImg);
break;
case "09d":
Picasso.with(context).load(base+"/weather-showers-day.png").into(viewHolder.weatherImg);
break;
case "10d":
Picasso.with(context).load(base+"/weather-rain-day.png").into(viewHolder.weatherImg);
break;
case "11d":
Picasso.with(context).load(base+"/weather-storm-day.png").into(viewHolder.weatherImg);
break;
case "13d":
Picasso.with(context).load(base+"/weather-snow.png").into(viewHolder.weatherImg);
break;
case "50d":
Picasso.with(context).load(base+"/weather-mist.png").into(viewHolder.weatherImg);
break;
case "01n":
Picasso.with(context).load(base+"/weather-clear-night.png").into(viewHolder.weatherImg);
break;
case "02n":
Picasso.with(context).load(base+"/weather-few-clouds-night.png").into(viewHolder.weatherImg);
break;
case "03n":
Picasso.with(context).load(base+"/weather-clouds-night.png").into(viewHolder.weatherImg);
break;
case "04n":
Picasso.with(context).load(base+"/weather-clouds-night.png").into(viewHolder.weatherImg);
break;
case "09n":
Picasso.with(context).load(base+"/weather-showers-night.png").into(viewHolder.weatherImg);
break;
case "10n":
Picasso.with(context).load(base+"/weather-rain-night.png").into(viewHolder.weatherImg);
break;
case "11n":
Picasso.with(context).load(base+"/weather-storm-night.png").into(viewHolder.weatherImg);
break;
case "13n":
Picasso.with(context).load(base+"/weather-snow.png").into(viewHolder.weatherImg);
break;
case "50n":
Picasso.with(context).load(base+"/weather-mist.png").into(viewHolder.weatherImg);
break;
}
}
}
嘗試'holder.currentWeather.setText（task.getTemperatur（））;' – Abbas