循环有问题,无法将值放入hashmap中

概述这个问题困扰了我很长时间.我使用名为bmob的云数据库,发现可以成功获取所需的数据.但是,循环中可能会有一些错误,我只能获取最后选择的项目的信息.附：我使用一个称为“播放列表”的数组列表来存储计算的数据,该数据将用于在下一个活动中显示列表视图.这是我的代码：publicclassD

这个问题困扰了我很长时间.我使用名为bmob的云数据库,发现可以成功获取所需的数据.但是,循环中可能会有一些错误,我只能获取最后选择的项目的信息.

附：我使用一个称为“播放列表”的数组列表来存储计算的数据,该数据将用于在下一个活动中显示列表视图.

这是我的代码：

public class DestinationActivity extends Activity implements OnClickListener, NumberPicker.OnValuechangelistener {private TextVIEw from_place, date, days, start_time, end_time, number, money_vIEw;private button addbutton, subbutton;private ImageVIEw backbutton, telephone;private ListVIEw ListVIEw;private button destinationOk_btn;private ShapeLoadingDialog shapeLoadingDialog;private Tip startTip;private Calendar calendar;private DatePickerDialog dialog;private TimePickerDialog dialog2;private List<Destination> destinationList = new ArrayList<Destination>();private DestinationAdapter adapter;private int number_value = 1; private String time_start;private String time_end;private int travel_days;double travelTime;//total playing timedouble travel_time;private int money;private int num = 1;private ArrayList<Integer> select_placeID = new ArrayList<Integer>(); public Map<Integer,Double> weightmap;public List<Plan> planList = new ArrayList<Plan>();int[] selectedID = new int[10];@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.destination_layout);    //initialize the cloud database    Bmob.initialize(this, BmobConfig.APP_ID);    ListVIEw = (ListVIEw) findVIEwByID(R.ID.List_destination);    destinationOk_btn = (button) findVIEwByID(R.ID.okbutton);    initDestinations(); // initialize the data    adapter = new DestinationAdapter(destinationList, DestinationActivity.this);    //adapter = new DestinationAdapter(this, destinationList, DestinationAdapter.getIsSelected());    ListVIEw.setAdapter(adapter);    //....Listeners and textvIEws.......    //submit button    destinationOk_btn.setonClickListener(new OnClickListener() {        @OverrIDe        public voID onClick(VIEw v) {            select_placeID.clear();            for (int i = 0; i < destinationList.size(); i++) {                if (DestinationAdapter.getIsSelected().get(i)) {                    select_placeID.add((i + 1));                }            }            //change to int array            selectedID = new int[select_placeID.size()];            for(int i = 0;i<select_placeID.size();i++){                selectedID[i] = select_placeID.get(i);            }            if (select_placeID.size() == 0) {                AlertDialog.Builder builder1 = new AlertDialog.Builder(DestinationActivity.this);                builder1.setMessage("no records");                builder1.show();            }            else {                AlertDialog.Builder builder = new AlertDialog.Builder(DestinationActivity.this);                builder.setMessage("waiting for magic...");                builder.show();                /**                 * calculate the route                 */                if (valIDate()) {                    new calRoute().execute();                }            }        }    });}//initialize the dataprivate voID initDestinations() {    //........}@OverrIDepublic voID onClick(VIEw v) {    //.......}/** * asynctask */private class calRoute extends AsyncTask<VoID, VoID, List<Plan>>{    public calRoute(){        // Todo auto-generated constructor stub    }    @OverrIDe    protected List<Plan> doInBackground(VoID... params) {        List<Plan> result = calculate(time_start, time_end, travel_days);        return result;    }    @OverrIDe    protected voID onPostExecute(List<Plan> result) {        super.onPostExecute(result);        if (result != null) {            Toast.makeText(DestinationActivity.this, "success", Toast.LENGTH_SHORT).show();            if(planList.size() > 0) {                Intent intent = new Intent();                intent.setClass(DestinationActivity.this, ActivityPlan.class);                intent.putParcelableArrayListExtra("planInfo", (ArrayList<? extends Parcelable>) planList);                startActivity(intent);            }            else{                Toast.makeText(DestinationActivity.this, "no plan", Toast.LENGTH_SHORT).show();            }        }    }}/** *plan **/public List<Plan> calculate(String time_start, String time_end, int travel_days) {    SimpleDateFormat df = new SimpleDateFormat(("HH:mm"));    Date starttime = new Date();    Date endtime = new Date();    try {        starttime = df.parse(time_start);    } catch (ParseException e) {        e.printstacktrace();    }    try {        endtime = df.parse(time_end);    } catch (ParseException e) {        e.printstacktrace();    }    double l = endtime.getTime() - starttime.getTime();    double hour = (l / (60 * 60 * 1000));    double min = ((l / (60 * 1000)) - hour * 60);    if(min == 0){        min = 60;    }    else {        travel_time = ((1.0 * travel_days * hour) * (min / 60));         DecimalFormat decimalFormat = new DecimalFormat("#.0");        travelTime = Double.parseDouble(decimalFormat.format(travel_time));    }    weightmap = new linkedHashMap<Integer, Double>(); //store weight    int totalPriority = 0;//total priority    final Destination start = new Destination(116.32133, 39.92269);    final HashMap<Integer, Integer> pMap = new HashMap<Integer, Integer>();    final HashMap<Integer, String> nameMap = new HashMap<Integer, String>();    final HashMap<Integer, Destination> objectMap = new linkedHashMap<Integer, Destination>();    /**     * get the data from cloud database     */            Bmobquery<Destination> query = new Bmobquery<Destination>();            for (int sID: selectedID) {                query.adDWhereEqualTo("ID", sID);                query.findobjects(new FindListener<Destination>() {                    @OverrIDe                    public voID done(List<Destination> List, BmobException e) {                        if (e == null) {                            System.out.println("success：total" + List.size() + "items.");                            for (Destination destination : List) {                                int p = destination.getPriority();                                int ID = destination.getID();                                String name = destination.getname();                                double longitude = destination.getLongitude();                                double latitude = destination.getLatitude();                                objectMap.put(ID, new Destination(longitude, latitude));                                System.out.println(ID);                                double dis = distanceUtil.distance(start.getLongitude(), start.getLatitude(),                                        longitude, latitude);                                pMap.put(ID, p);                                weightmap.put(ID, new Double(dis));                                nameMap.put(ID, name);                            }                        } else {                            Log.i("bmob", "error：" + e.getMessage() + "," + e.getErrorCode());                        }                    }                });            }    for (Integer key : pMap.keySet()) {        int p = pMap.get(key).intValue();        totalPriority = totalPriority + p;    }    double weight = 0.0;    for (Map.Entry<Integer, Double> hm : weightmap.entrySet()) {        double hm2Value = pMap.get(hm.getKey());        weight = totalPriority / hm.getValue() * hm2Value;        weightmap.put(hm.getKey(), weight);    }    /**     * 按照weight值来排序     * 判断是否传递数据给plan_activity     */    MapUtil.sortByValue(weightmap);    //排好序后计算距离    Iterator it = weightmap.entrySet().iterator();    int order = 0;    while (it.hasNext()) {        order++;        Map.Entry entry = (Map.Entry) it.next();        objectMap.put(new Integer(order), objectMap.get(entry.getKey()));    }    PlanTask planTask = new PlanTask();//封装了每个plan计算的方法    for (Map.Entry<Integer, Double> entry : weightmap.entrySet()) {        System.out.println("ID= " + entry.getKey());        double play_time = planTask.calPlay_time(weightmap.size(),                weightmap.get(entry.getKey()), travelTime);        double driving_time = planTask.calDrive_time(distanceUtil.distance(                objectMap.get(entry.getKey()).getLatitude(),                objectMap.get(entry.getKey()).getLongitude(),                objectMap.get(entry.getKey() + 1).getLatitude(),                objectMap.get(entry.getKey() + 1).getLongitude()        ));        String arrive_time = "hello world";//未完待续        String place_name = nameMap.get(entry.getKey());        Plan plan = new Plan(place_name, arrive_time, driving_time, play_time);        //传递plan对象List        planList.add(entry.getKey(), plan);    }    return planList;}

}

当我调试它时,我发现在calculate()函数中,

  Bmobquery<Destination> query = new Bmobquery<Destination>();            for (int sID: selectedID) {                query.adDWhereEqualTo("ID", sID);query.findobjects(new FindListener<Destination>() {                    @OverrIDe                    public voID done(List<Destination> List, BmobException e) {                        if (e == null) {                            System.out.println("success：total" + List.size() + "items.");                            for (Destination destination : List) {                                int p = destination.getPriority();                                int ID = destination.getID();                                String name = destination.getname();                                double longitude = destination.getLongitude();                                double latitude = destination.getLatitude();                                objectMap.put(ID, new Destination(longitude, latitude));                                System.out.println(ID);                                //calculate the distance                                double dis = distanceUtil.distance(start.getLongitude(), start.getLatitude(),                                        longitude, latitude);                                pMap.put(ID, p);                                weightmap.put(ID, new Double(dis));                                nameMap.put(ID, name);                            }                        } else {                            Log.i("bmob", "error：" + e.getMessage() + "," + e.getErrorCode());                        }                    }                });

为“成功：总共1个项目”.循环后,如果我选择了3个项目,则将是“成功：总共1个项目”. 3次,仅捕获最后一项的信息.
AND三个哈希图的大小：pMap,nameMap和objectMap均为零.为什么？？？真奇怪

LogCAT中没有错误,但是,有序列表视图无法显示在第二个活动中.请帮助我,它困扰了我很长时间.
谢谢！！！

解决方法:

不幸的是,我无法弄清楚,因为我对反应式编程并不十分满意,因为该平台通常会使用很多rxjava,但这可以使代码有所增强

final HashMap<Integer, Integer> pMap = new HashMap<Integer, Integer>();final HashMap<Integer, String> nameMap = new HashMap<Integer, String>();final HashMap<Integer, Destination> objectMap = new linkedHashMap<Integer, Destination>();/** * get the data from cloud database */Bmobquery<Destination> query = new Bmobquery<Destination>();// this time only one List of three elements is added instead of three Lists of one element eachquery.adDWhereContainedIn("ID", Arrays.asList(selectedID));query.findobjects(new FindListener<Destination>() {                @OverrIDe                public voID done(List<Destination> List, BmobException e) {                    if (e == null) {                        System.out.println("success：total" + List.size() + "items.");                        for (Destination destination : List) {                            int p = destination.getPriority();                            int ID = destination.getID();                            String name = destination.getname();                            double longitude = destination.getLongitude();                            double latitude = destination.getLatitude();                            objectMap.put(ID, new Destination(longitude, latitude));                            System.out.println(ID);                            //calculate the distance                            double dis = distanceUtil.distance(start.getLongitude(), start.getLatitude(),                                    longitude, latitude);                            pMap.put(ID, p);                            weightmap.put(ID, new Double(dis));                            nameMap.put(ID, name);                        }                        // continue execution here though you won't be able to return a List of plans here                    } else {                        Log.i("bmob", "error：" + e.getMessage() + "," + e.getErrorCode());                    }                }});

希望这可以帮助 ：)

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