Android Intents and Lists

Question

I plan on reading several files when my app/game is created and using the information from them for the entirety of the app. I also have to write to the file at one point.

I have two files. One is a 2-column text file that I'll turn into a dictionary for fast searching. The other is a text file that has 11 columns. I'll make a dictionary out of two of the columns, and the other data I need kept as is so I can write to the columns to count the amount of times something happens in different circumstances for datamining.

Currently, I've turned the second file into a list of a list of strings, or List>. I can't figure out how to pass that around in intents. ".putStringArrayListExtra" only works for a list of strings.

Am I going about this the wrong way entirely? This is my first real Android app.

Answer 1

In order to store a data structure into an Intent , it has to be either serializable or parcelable. If your data structure is neither of them, you might create a class that would implement Serializable and manage it. A good example might be found here .

Once done, you then might use Intent.putSerializable(...) to store your data structure. See this:

• Using putSerializable in Android

Additionally to this, if you could convert your structure into a JSON structure, you'd already have it done since it would be treated as a String . If not, the above solution should be easy to do.