安卓：将此对象作为Parcelable将此、对象、Parcelable

2023-09-12 05:43:34 作者：上帝也卖萌

我有我需要2 活动之间传递对象。该对象有哈希表，字符串[]，等等。真搞不懂如何使它Parcalebale，这样我可以填充对象的数组，并通过单一的obj或数组其他活动。我的类是：

I have an object that I need to pass between 2 Activity. The object has HashTable, String[], etc. Can't make out how to make it Parcalebale so that I can populate an array of the object and pass single obj or array to other Activity. My class is :

 public class TrainRoute  { // implements Parcelable
private String RouteName;
private int RouteIndex;

private Context ctx;
private Hashtable<String, String> stationsList;
private String[] stationsNames;
private String[] trainTimings;

private boolean hasSpecialMessages;
private Hashtable<String, String> specialMessages; 

private String firstStation; 
private String CURRENT_ROUTE_PATH;


public TrainRoute(Context ctx, String routeName, int routeIndex, String routeUpOrDownPath, boolean hasSpecialMessages) {
    this.ctx = ctx;
    this.RouteName = routeName;
    this.RouteIndex = routeIndex;
    this.CURRENT_ROUTE_PATH = routeUpOrDownPath;
    this.hasSpecialMessages = hasSpecialMessages;       
}
public String getName() { return RouteName; }
public int getIndex() { return RouteIndex; }

public String[] getStationsNames()
{       
    if(this.stationsList == null)
    {
        String file = this.CURRENT_ROUTE_PATH + "/" + CONSTANTS.SUBPATH_STATIONS + "/" + this.RouteIndex + ".txt";
        String[][] tempList = ResourceReader.GetValues(ctx, file, 2);
        this.stationsList = new Hashtable<String, String>(tempList.length);
        this.stationsNames = new String[tempList.length];
        for(int i=0;i<tempList.length;i++)
        {
            this.stationsList.put(tempList[i][0], tempList[i][1] );
            this.stationsNames[i] = tempList[i][0];
        }
        this.firstStation = this.stationsNames[0];
    }

    return stationsNames;
}

public String[] getTimings(String stationName)
{
    if(this.trainTimings == null)
    {
        String file = this.CURRENT_ROUTE_PATH + "/" + CONSTANTS.SUBPATH_TIMINGS + "/" + this.RouteIndex + ".txt";
        this.trainTimings = ResourceReader.GetLines(ctx, file);

        for(int i=0;i<this.trainTimings.length;i++)
        {
            this.trainTimings[i] = this.trainTimings[i].substring(0, 2) + ":" + this.trainTimings[i].substring(2, 4);
        }
    }

    int minutesFromOrigin =  
        Integer.parseInt(this.stationsList.get(stationName).toString())
        - Integer.parseInt(this.stationsList.get(this.firstStation).toString());

    String[] trainTimingsForStation = new String[this.trainTimings.length];
    for (int i = 0; i < trainTimingsForStation.length; i++) {
        trainTimingsForStation[i] = AddMinutes(this.trainTimings[i], minutesFromOrigin);
    }

    return trainTimingsForStation;
}

public void loadSpecialMessages()
{
    if(this.hasSpecialMessages == true && this.specialMessages == null)
    {
        this.specialMessages = new Hashtable<String, String>();
        String specialMessagesFilePath = this.CURRENT_ROUTE_PATH + "/" + CONSTANTS.SPECIALMESSAGES_FOLDER_NAME + "/" + this.RouteIndex + ".txt";

        String[][] tempSpecialMessages = ResourceReader.GetValues(ctx, specialMessagesFilePath, 2);
        for (int i = 0; i < tempSpecialMessages.length; i++)
        {
            tempSpecialMessages[i][1] = tempSpecialMessages[i][1].replaceAll("\\n", "\n");  //  StringFunctions.replace(tempSpecialMessages[i][1], "\\n", "\n");


            tempSpecialMessages[i][0] = tempSpecialMessages[i][0].substring(0, 2) + ":" + tempSpecialMessages[i][0].substring(2, 4);;

            this.specialMessages.put(tempSpecialMessages[i][0], tempSpecialMessages[i][1]);
        }
    }
}   

public boolean hasSpecialMessage(int trainIndex)
{
    if(this.hasSpecialMessages == true)
    {
        return this.specialMessages.containsKey(this.trainTimings[trainIndex - 1]);
    }
    else
        return false;
}


public String getSpecialMessage(int trainIndex)
{
    return this.specialMessages.get((this.trainTimings[trainIndex - 1]).toString()).toString();
}

在实施Parcelable，我真搞不懂怎么加中实现功能的对象字段。

On implementing Parcelable, I can't make out how to add the object fields in implemented functions.

由于这么多的哈希表，字符串[]，将实施Serialiazable更多preferred对于这种情况比Parcelable？如果加上序列化，然后还如何实现TS方法是一样的。

Due to so many HashTable, String[], would implementing Serialiazable more preferred for this case than Parcelable ? If add Serializable then also how to implement ts methods for the same.

编辑：在上面的OBJ，我添加了一个方法：

In the above obj, I added a method :

    public Hashtable<String, String> getAllSpecialMessages() {
    return this.specialMessages;
}

我想只是为了通过这个哈希表从我的活动到另一个活动：

I am trying just to pass this HashTable from my Activity to another Activity :

intent.putExtra("specialMsgs", curTrainRoute.getAllSpecialMessages());

// OTHER ACTIVTY 
    Serializable data = sender.getSerializableExtra("specialMsgs");
    if (data != null) {
        spMsgs = new Hashtable<String, String>((HashMap<String, String>)data);
        Log.i(TAG, " GOT spMsgs : Len = " + spMsgs.size());
        if (spMsgs.size() > 0) {
            java.util.Enumeration<String> keys = spMsgs.keys(); 
            while(keys.hasMoreElements()) {
                Log.i(TAG, "SP= " + spMsgs.get(keys));
            }
        }
    }

在这里，我得到GOT spMsgs：长度= 4，但在登录SP =，我得到无限空的通过哈希表???我是什么人仍下落不明。

Here I get "GOT spMsgs : Len = 4. But in Log SP=, I get infinite null. Why enteries can't be found of passed Hashtable ??? What am I still missing ?

要寻找出一些指导，因为最近2天这个问题，但无法弄清楚什么＆功放;如何做到与此对象。

Am looking out for some guidance for this issue since last 2 days, but couldn't figure out what & how to do with this object.

任何帮助是非常AP preciated。

Any help is highly appreciated.