ClassNotFoundException的時候：io.realm.NeedRealmProxy $$ Parcelable

Question

從片段HomeFragment

public void onTaskClick(View view, Need need, int position) { 
    Log.d(TAG, "onTaskClick() - " + need.toString()); 

    Intent intent = new Intent(getActivity(), TaskDetailsActivity.class); 

    Bundle bundle = new Bundle(); 
    bundle.putParcelable(TaskDetailsActivity.EXTRA_OBJ_NEED, Parcels.wrap(need)); 

    startActivity(intent, bundle); 
} 

這裏運行此代碼段，當我得到這個錯誤是Need.java

@Parcel(implementations = {NeedRealmProxy.class}, value = Parcel.Serialization.FIELD, analyze = { Need.class }) 
public class Need extends RealmObject implements Serializable { 

    @PrimaryKey 
    @SerializedName("_id") 
    private String id; 

    @SerializedName("created") 
    private Date created; 

    @SerializedName("status") 
    private String status; 

    @SerializedName("fees") 
    float fees; 

    @SerializedName("user") 
    private User user; 

    @ParcelPropertyConverter(RealmListParcelConverter.class) 
    @SerializedName("places") 
    private RealmList<Place> places; 

    @SerializedName("user_location") 
    private Place userLocation; 

    @ParcelPropertyConverter(RealmListParcelConverter.class) 
    @SerializedName("items_ordered") 
    private RealmList<ItemOrdered> itemsOrdered; 

    @ParcelPropertyConverter(RealmListParcelConverter.class) 
    @SerializedName("movings") 
    private RealmList<Moving> movings; 

    @ParcelPropertyConverter(RealmListParcelConverter.class) 
    @SerializedName("messages") 
    private RealmList<Message> messages; 

    @SerializedName("run") 
    private Run run; 


    public Need() {} 

    public String getId() { 
     return id; 
    } 

    public void setId(String id) { 
     this.id = id; 
    } 

    public List<Place> getPlaces() { 
     return places; 
    } 

    public List<ItemOrdered> getItemsOrdered() { 
     return itemsOrdered; 
    } 

    public User getUser() { 
     return user; 
    } 

    public void setUser(User user) { 
     this.user = user; 
    } 

    public Double getAmount() { 
     double p = 0; 
     for (ItemOrdered e: itemsOrdered) { 
      if (e.getItem().getPrice() != null) { 
       p += e.getItem().getPrice() * e.getQuantity(); 
      } 
     } 

     return p; 
    } 

    public Place getUserLocation() { 
     return userLocation; 
    } 

    public void setUserLocation(Place userLocation) { 
     this.userLocation = userLocation; 
    } 

    public Date getCreated() { 
     return created; 
    } 

    public String getCreatedFormatted() { 
     SimpleDateFormat format = new SimpleDateFormat("MMM dd, HH:mm"); 

     return format.format(created); 
    } 

    public void setCreated(Date created) { 
     this.created = created; 
    } 

    public String getStatus() { 
     return status; 
    } 

    public List<Message> getMessages() { 
     return messages; 
    } 

    public Run getRun() { 
     return this.run; 
    } 

    public List<Moving> getMovings() { 
     return movings; 
    } 

    public void setMovings(RealmList<Moving> movings) { 
     this.movings = movings; 
    } 

    public float getFees() { 
     return fees; 
    } 

    public void setFees(float fees) { 
     this.fees = fees; 
    } 

    public void setPlaces(RealmList<Place> places) { 
     this.places = places; 
    } 

    public void setItemsOrdered(RealmList<ItemOrdered> itemsOrdered) { 
     this.itemsOrdered = itemsOrdered; 
    } 

    public void setMessages(RealmList<Message> messages) { 
     this.messages = messages; 
    } 

    @Override 
    public String toString() { 
     return "Need{" + 
       "id= '" + id + '\'' + 
       ", movings='" + movings.size() + '\'' + 
       ", places=" + places.size() + 
       ", itemsOrdered=" + itemsOrdered.size() + 
       ", userLocation=" + userLocation.getLng() + "," + userLocation.getLat() + 
       ", user=" + user + 
       '}'; 
    } 
} 

這裏是RealmListParcelConverter.java

public class RealmListParcelConverter implements 
     TypeRangeParcelConverter<RealmList<? extends RealmObject>, RealmList<? extends RealmObject>> { 
    private static final int NULL = -1; 

    @Override 
    public void toParcel(RealmList<? extends RealmObject> input, android.os.Parcel parcel) { 
     parcel.writeInt(input == null ? NULL : input.size()); 
     if (input != null) { 
      for (RealmObject item : input) { 
       parcel.writeParcelable(Parcels.wrap(item), 0); 
      } 
     } 
    } 

    @Override 
    public RealmList fromParcel(android.os.Parcel parcel) { 
     int size = parcel.readInt(); 
     RealmList list = new RealmList(); 
     for (int i=0; i<size; i++) { 
      Parcelable parcelable = parcel.readParcelable(getClass().getClassLoader()); 
      list.add((RealmObject) Parcels.unwrap(parcelable)); 
     } 
     return list; 
    } 
} 

錯誤

android.os.BadParcelableException：ClassNotFoundException的時 解組：io.realm.NeedRealmProxy $$ Parcelable在 android.os.Parcel.readException（Parcel.java:1427）在 機器人.os.Parcel.readException（Parcel.java:1379）在 android.app.ActivityManagerProxy.startActivity（ActivityManagerNative.java:1761） 在 android.app.Instrumentation.execStartActivity（Instrumentation.java:1411） 在機器人。 app.Activity.startActivityForResult（Activity.java:3351）a噸 android.support.v4.app.BaseFragmentActivityJB.startActivityForResult（BaseFragmentActivityJB.java:50） 在 android.support.v4.app.FragmentActivity.startActivityForResult（FragmentActivity.java:79） 在 android.support.v4。 app.ActivityCompatJB.startActivityForResult（ActivityCompatJB.java:30） 在 android.support.v4.app.ActivityCompat.startActivityForResult（ActivityCompat.java:146） 在 android.support.v4.app.FragmentActivity.startActivityFromFragment（FragmentActivity。 java：932） at android.support.v4.app.FragmentActivity $ HostCallbacks.onStartActivityFromFragment（FragmentActivity.java:1047） at android.support.v4.app.Fragm ent.startActivity（Fragment.java:940） 在 com.nkapsi.ui.fragment.HomeFragment.onTaskClick（HomeFragment.java:201）

Answer 1

做

@Parcel(value = Parcel.Serialization.FIELD, analyze = { Need.class }) 

和

bundle.putParcelable(TaskDetailsActivity.EXTRA_OBJ_NEED, Parcels.wrap(realm.copyFromRealm(need))); 

---

PS通常你只需要發送對象的主鍵，而不是整個對象。

---

---

但基於領域的Java問題，顯然你需要以下的ProGuard配置

-keepnames public class * extends io.realm.RealmObject

Answer 2

您應該通過ID而不是和其他拉動物體出來的ID側。

喜歡的東西：

public void onTaskClick(View view, Need need, int position) { 
    Log.d(TAG, "onTaskClick() - " + need.toString()); 

    Intent intent = new Intent(getActivity(), TaskDetailsActivity.class); 
    intent.putExtra("need_id", need.getId()); 
    startActivity(intent); 
} 

然後在活動收到的ID，讓對象回來。

// in onCreate(), onHandleIntent(), etc. 
// get the needId back out. 
String needId = intent.getStringExtra("need_id"); 

// get the object out by id. 
realm.where(Need.class).equalTo("id", needId).findFirst(); 

// Lookup by PK is super fast, but if you want you can always use 
realm.where(Need.class).equalTo("id", needId).findFirstAsync(); 
// This will make this microsecond lookup happen on a background thread 
// and return the object back to you on your main thread, but is 
// probably overkill for a single object. 

更多內容（https://realm.io/docs/java/latest/#intents）

Answer 3

RealmObject不能是可序列化。所以你將無法使用put extra來傳遞任何RealmObject。在這種情況下，您應該傳遞RealmObject的ID。在目標活動中，您應該使用此ID來查詢RealmObject。正如@Eric Maxwell回答的那樣。