Android AIDL传递包含枚举的自定义类型

AIDL使用过程中会遇到自定义类型的数据传输，自定义类型可能会包含枚举类型，使用错误，会出现各种错误：

E/JavaBinder: *** Uncaught remote exception!  (Exceptions are not yet supported across processes.)
    java.lang.ArrayIndexOutOfBoundsException: length=8; index=3014765
        at com.Data.(Data.java:96)
        at com.Data$1.createFromParcel(Data.java:116)
        at com.Data$1.createFromParcel(Data.java:113)
        at com.DataListener$Stub.onTransact(DataListener.java:65)
        at android.os.Binder.execTransactInternal(Binder.java:1154)
        at android.os.Binder.execTransact(Binder.java:1123)

整理了下使用枚举注意事项

1. 定义枚举

    public enum CameraStatus {
        WORKING(0),
        CAMERA_FAILURE(1),
        UNRECOGNIZED(2)；
      public static CameraStatus forNumber(int value) {
            switch (value) {
                case 0:
                    return WORKING;
                case 1:
                    return CAMERA_FAILURE;
                default:
                    return UNRECOGNIZED;
            }
        }
     }
   

2. 自定义类型添加枚举变量

    public class Data implements Parcelable {
        public Data () {
        }
        public int size;
        public boolean valid;
        public CameraStatus camera_status = CameraStatus.UNRECOGNIZED;
    }
   

3. 修改writeToParcel和构造方法

   public void writeToParcel(Parcel dest, int flags) {
        dest.writeInt(size);
        dest.writeByte((byte) (valid? 1 : 0));
        dest.writeInt(camera_status.ordinal());
    }
   protected Data(Parcel in) {
        size= in.readInt();
        valid = in.readByte() != 0;
        camera_status = CameraStatus.values()[in.readInt()];
   

read和write顺序要对应上，不然会出问题。