I'm using Gson and am trying to add a bunch of string values into a JsonArray like this:
JsonArray jArray = new JsonArray();
jArray.add("value1");
The problem is that the add method only takes a JsonElement.
I've tried to cast a String into a JsonElement but that didn't work.
How do I do it using Gson?
You can create a primitive that will contain the String value and add it to the array:
JsonArray jArray = new JsonArray();
JsonPrimitive element = new JsonPrimitive("value1");
jArray.add(element);
Seems like you should make a new JsonPrimitive("value1") and add that.
See The javadoc
For newer versions of Gson library , now we can add Strings too. It has also extended support for adding Boolean, Character, Number etc. (see more here)
Using this works for me now:
JsonArray msisdnsArray = new JsonArray();
for (String msisdn : msisdns) {
msisdnsArray.add(msisdn);
}
I was hoping for something like this myself:
JsonObject jo = new JsonObject();
jo.addProperty("strings", new String[] { "value1", "value2" });
But unfortunately that isn't supported by GSON so I created this helper:
public static void Add(JsonObject jo, String property, String[] values) {
JsonArray array = new JsonArray();
for (String value : values) {
array.add(new JsonPrimitive(value));
}
jo.add(property, array);
}
And then use it like so:
JsonObject jo = new JsonObject();
Add(jo, "strings", new String[] { "value1", "value2" });
Voila!
