發送加載arrayList Android

Question

我在開發Android項目時遇到問題。 我想在一個文件中保存一個名爲arrayVersion的名爲'Version'的對象，以便在我的MainActivity開始時加載它。 與我發送的對象相比，返回的對象的字段沒有相同的值。

這裏是save（）方法

public void save(){ 
if (arrayVersion.size()!=0){ 
      ObjectOutput out = null; 
      try { 
       Log.d("save", "save"); 
       out = new ObjectOutputStream(new FileOutputStream(new File(getFilesDir(),"")+File.separator+"Version.log")); 
       Log.d("save", ""+arrayVersion.get(0).getLevel()); //Writes 6 for instance 
       out.writeObject(arrayVersion); 
       out.close(); 
      } catch (FileNotFoundException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } 
} 

我在logcat的把我的版本水平的代碼。

這裏是我的加載方法的代碼

private void load() { 

//Initialisation of my arrayList 
if(arrayVersion.size()==0){ 
    for (int j = 0; j <= nbVersions; j++) { 
     MainActivity.arrayVersion.add(Version.getVersion(j)); 
    } 
} 
    try { 
    ObjectInputStream is = new ObjectInputStream(new FileInputStream(new File(new File(getFilesDir(),"")+File.separator+"Version.log"))); 
    arrayVersion = (ArrayList<Version>) is.readObject(); 
    Log.d("load", "load"+arrayVersion.size()); //Writes the good size 
    Log.d("load", ""+arrayVersion.get(0).getName());//writes the good name 
    Log.d("load", ""+arrayVersion.get(0).getLevel());//writes 0 everytime 

    is.close(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } catch (ClassNotFoundException e) { 
     e.printStackTrace(); 
    } 


} 

當我重裝我的應用程序中，arrayVersion.size（）返回正確的尺寸和良好的元素（以不同的名稱版本），但現場級總是在0.

這裏是我的班級版本的代碼。

公共類版本實現Serializable {

/** 
* 
*/ 
private static final long serialVersionUID = 8733931469883869946L; 
protected static int level; 
protected static double price; 
protected static double ups; 
protected String name; 
protected int upsTag; 
protected int priceTag; 
protected int levelTag; 
protected static int index; 
protected double modifier; 
protected double DEFAULT_UPS; 


public Version() { 

} 

public int getIndex() { 
    // 
    return index; 
} 

public double getUps() { 
    // 
    return ups; 
} 

public double getPrice() { 
    // 
    return price; 
} 

public void upgrade() { 
    price*=1.10; 
    level++; 
    Log.d("upgrade","niveau" + level); 
} 

public void calcUps() { 
    // 

} 

public int getLevel() { 
    // 
    return level; 
} 

public int getUpsTag() { 
    // 
    return upsTag; 
} 

public int getPriceTag() { 
    // 
    return priceTag; 
} 

public int getLevelTag() { 
    // 
    return levelTag; 
} 

public String getName() { 
    // 
    return name; 
} 

public static Version getVersion(int index) { 
    Version version = null; 
    if(index == 0) 
     version = Alpha.getAlpha(); 
    if (index == 1) 
     version = Beta.getBeta(); 
    if (index == 2) 
     version = ApplePie.getApplePie(); 
    if (index == 3) 
     version = BananaBread.getBananaBread(); 
    if (index == 4) 
     version = Cupcake.getCupcake(); 
    if (index == 5) 
     version = Donut.getDonut(); 
    if (index == 6) 
     version = Eclair.getEclair(); 


    return version; 
} 

public void upgrade(int index) { 

} 

}

這裏是我的課的Alpha，它擴展版

公共類阿爾法擴展版本{

/** 
* 
*/ 
private static final long serialVersionUID = -4246008928649558154L; 
private String name = "alpha"; 
private static Alpha alpha; 

Alpha() { 
    modifier = 1; 
    level = 0; 
    price=10; 
    DEFAULT_UPS=0.1; 
    ups=0; 
    index = 0; 
    upsTag = R.id.AlphaUps; 
    priceTag = R.id.AlphaPrice; 
    levelTag = R.id.AlphaLevel; 
} 

public static Alpha getAlpha() { 
    if (alpha==null) 
     alpha = new Alpha(); 
    return alpha; 
} 
public void upgrade() 
{ 
price*=1.10; 
level++; 
Log.d("upgrade","niveau" + level); 
if (level==10){UpgradesActivity.setTag(21);} 
if (level==25){UpgradesActivity.setTag(22);} 
if (level==50){UpgradesActivity.setTag(23);} 
if (level==100){UpgradesActivity.setTag(24);} 
if (level==150){UpgradesActivity.setTag(25);} 
if (level==200){UpgradesActivity.setTag(26);} 
if (level==250){UpgradesActivity.setTag(27);} 

} 


public int getIndex() { 
    return index; 
} 

public int getLevel() { 
    return level; 
} 

public double getPrice() { 
    return price; 
} 

public void calcUps() { 
    ups = level*DEFAULT_UPS*modifier; 
    Log.d("alpha", String.valueOf(ups));  
    } 
public double getUps() { 
    return ups; 
    } 
public String getName() 
{ 
    return name; 
} 

public void upgrade (int index){ 
    if (index ==21){modifier *= 2;calcUps();} 
    if (index ==22){modifier *= 2;calcUps();} 
    if (index ==23){modifier *= 2;calcUps();} 
    if (index ==24){modifier *= 2;calcUps();} 
    if (index ==25){modifier *= 2;calcUps();} 
    if (index ==26){modifier *= 2;calcUps();} 
    if (index ==27){modifier *= 2;calcUps();} 


} 
} 

的代碼

我希望這足以讓你幫助我，如果有的話是什麼你不明白的，不要猶豫，問我。

注：這是我第一次發帖，我真的開始在Android的編程

編輯：我的logcat是如下因素：

10-20 23:01:22.099: D/stack(23782): before load :alpha &0 
10-20 23:01:22.099: D/stack(23782): before load :beta &0 
10-20 23:01:22.099: D/stack(23782): before load :apple pie &0 
10-20 23:01:22.099: D/stack(23782): before load :bananaBread &0 
10-20 23:01:22.099: D/stack(23782): before load :cupcake &0 
10-20 23:01:22.099: D/stack(23782): before load :donut &0 
10-20 23:01:22.099: D/stack(23782): before load :eclair &0 
10-20 23:01:22.149: D/stack(23782): after load :alpha &0 
10-20 23:01:46.213: D/stack(23782): before save :alpha &12 
10-20 23:01:46.293: D/stack(23782): after save : alpha &12 
10-20 23:02:08.555: D/stack(23782): before save :alpha &12 
10-20 23:02:08.595: D/stack(23782): after save : alpha &12 
10-20 23:02:28.904: D/stack(23782): before save :alpha &12 
10-20 23:02:28.904: D/stack(23782): before save :beta &7 
10-20 23:02:28.954: D/stack(23782): after save : alpha &12 
10-20 23:02:28.954: D/stack(23782): after save : beta &7 

Answer 1

問題解決了： 在我班上的靜態字段版本沒有寫入我試圖保存和加載的數組中。

不要在可序列化類中放置靜態字段。