How to pass a class with Bigdecimal and Date attribute through intents(Bundle)?

Question

I have a ArrayList<MinhaClasse> with Bigdecimal attribute and I am going through Intent from one activity to another. The problem is that the Bigdecimal attribute passes with null value.

Can’t you pass a Bigdecimal attribute? I’m with an attribute date with same problem.

Answer 1

Has (at least) two possibilities:

• Make Minhaclasse implement Serializable, which is not advisable for this purpose⁽¹⁾.
  Date and Bigdecimal implement Serializable, they will be processed without problem.
  Must use getSerializableExtra()instead of getParcelableExtra().

• Change Minhaclasse to store in Parcel a String and a long with Bigdecimal and Date values. They, after retrieved, are used to recreate them.

  public class ClassParcelable implements Parcelable{
  
      private Date someDate;
      private BigDecimal someBigValue;
  
      public ClassParcelable(Date someDate, BigDecimal someBigValue){
          this.someDate = someDate;
          this.someBigValue = someBigValue;
      }
  
      //Implementação da Parcelable
  
      @Override
      public void writeToParcel(Parcel dest, int flags) {
  
          //Guarda um long que representa a data
          dest.writeLong(someDate.getTime());
  
          //Guarda uma String com a representação do valor do BigDecimal
          dest.writeString(someBigValue.toPlainString());
      }
  
      protected ClassParcelable(Parcel in) {
  
          //Recupera o long que representa a data e recria-a
          someDate = new Date(in.readLong());
          //Recupera a String que representa o valor do BigDecimal e recria-o
          someBigValue = new BigDecimal(in.readString());
      }
  
      @Override
      public int describeContents() {
          return 0;
      }
  
      public static final Creator<ClassParcelable> CREATOR = new Creator<ClassParcelable>() {
          @Override
          public ClassParcelable createFromParcel(Parcel in) {
              return new ClassParcelable(in);
          }
  
          @Override
          public ClassParcelable[] newArray(int size) {
              return new ClassParcelable[size];
          }
      };
  }
  

_{⁽¹⁾ - Reflection is used during the process and many additional objects are created, which can cause a lot of garbage collection. The result is poor performance and high battery consumption.}