saveJSONObject ERROR!!

In the java mode the code work when I use Android mode it don't work anymore,it only crash the app how can I make it work that.

JSONObject data;

int score=2;

int record;

void setup() { data = loadJSONObject("data.json");}

void draw () {

record = data.getInt("record");

record=score;

data.setInt("record", record);

saveJSONObject(data, "data/data.json");}