Writing/Reading arrays or Stringarrays in Parcelable

Question

In order to pass an object between 2 activities in my app, i made the class implement Parcable and everything works fine. Now I want to extend this class with an Array of String Arrays (String[][]).

I searched the internet for some time but i couldn't find a way to handle this at writeToParcel(Parcel dest, int flags) and in the Constructor MyClass(Parcel in).

Another option would be to create a class with just 2 Strings stringA and stringB and let that class implement Parcable, too. Then i could use readList() and writeList() to write lists of that Parcables but this doesnt seem to be an ideal solution.

Any suggestions?

Answer 1

The Parcel class has a writeStringArray() method. Couldn't your class iterate over the String[][] and call writeStringArray for each?

Assuming your class has a member:

String[][] data;

in writeToParcel()

parcel.writeInt(data.length);
for( int i=0; i<data.lengh; i++ ){
    parcel.writeStringArray(data[i]);
}

in createFromParcel()

int size = parcel.readInt();
data = new String[size][];
for( int i=0; i<size; i++ ){
  data[i] = parcel.readStringArray();
}