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Guild Wars 2 Account API Usage in Android

1st August 201526th August 2015 by dubbeh

Simple code snippet, used for retrieving a users account data, using the Guild Wars 2 API Version 2. Hopefully, this code will help others to overcome similar problems which I was facing while learning how to program in Android. First thing you will need is the JSONFunctions.java class:

import android.content.Context;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class JSONFunctions {

    static JSONObject jObj;
    static JSONArray jArray;

    protected static String readResource (Context ctx, String filename) throws IOException {

        StringBuilder sb = new StringBuilder();
        BufferedReader input = new BufferedReader(new InputStreamReader(ctx.getAssets().open(filename), "utf-8"), 8192);

        String currLine;
        while ((currLine = input.readLine()) != null) {
            sb.append(currLine);
        }
        input.close();

        return sb.toString();
    }

    public static JSONArray getJSONFromResource (Context ctx, String filename) throws IOException {
        try {
            String json = readResource(ctx, filename);
            jArray = new JSONArray(json);
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return jArray;
    }

    protected static String readURL (String url) throws IOException {
        StringBuilder sb = new StringBuilder();

        URL requestUrl = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) requestUrl.openConnection();
        if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
            BufferedReader input = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"), 8192);

            String line;
            while ((line = input.readLine()) != null) {
                sb.append(line);
            }

            input.close();
        }

        return sb.toString();
    }

    public static JSONObject getJSONFromURL (String url) throws IOException {
        try {
            String json = readURL(url);
            jObj = new JSONObject(json);
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return jObj;
    }

    public static String HTTPGetFromKey (String apikey) throws IOException {

        StringBuilder sb = new StringBuilder();

        URL requestUrl = new URL("https://api.guildwars2.com/v2/account");
        HttpURLConnection conn = (HttpURLConnection) requestUrl.openConnection();
        conn.addRequestProperty("Authorization", "Bearer " + apikey);
        conn.setAllowUserInteraction(false);
        conn.setInstanceFollowRedirects(true);
        conn.setRequestMethod("GET");
        conn.connect();

        if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
            BufferedReader input = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"), 8192);
            String line;
            while ((line = input.readLine()) != null) {
                sb.append(line);
            }
            input.close();
            conn.disconnect();
        }

        return sb.toString();
    }

    public static JSONObject getJSONFromUserKey (String key) throws IOException {
        try {
            String json = HTTPGetFromKey(key);
            jObj = new JSONObject(json);
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return jObj;
    }
}

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import android.content.Context;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

public class JSONFunctions {

static JSONObject jObj;

static JSONArray jArray;

protected static String readResource (Context ctx, String filename) throws IOException {

StringBuilder sb = new StringBuilder();

BufferedReader input = new BufferedReader(new InputStreamReader(ctx.getAssets().open(filename), "utf-8"), 8192);

String currLine;

while ((currLine = input.readLine()) != null) {

sb.append(currLine);

}

input.close();

return sb.toString();

}

public static JSONArray getJSONFromResource (Context ctx, String filename) throws IOException {

try {

String json = readResource(ctx, filename);

jArray = new JSONArray(json);

} catch (JSONException e) {

e.printStackTrace();

}

return jArray;

}

protected static String readURL (String url) throws IOException {

StringBuilder sb = new StringBuilder();

URL requestUrl = new URL(url);

HttpURLConnection conn = (HttpURLConnection) requestUrl.openConnection();

if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {

BufferedReader input = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"), 8192);

String line;

while ((line = input.readLine()) != null) {

sb.append(line);

}

input.close();

}

return sb.toString();

}

public static JSONObject getJSONFromURL (String url) throws IOException {

try {

String json = readURL(url);

jObj = new JSONObject(json);

} catch (JSONException e) {

e.printStackTrace();

}

return jObj;

}

public static String HTTPGetFromKey (String apikey) throws IOException {

StringBuilder sb = new StringBuilder();

URL requestUrl = new URL("https://api.guildwars2.com/v2/account");

HttpURLConnection conn = (HttpURLConnection) requestUrl.openConnection();

conn.addRequestProperty("Authorization", "Bearer " + apikey);

conn.setAllowUserInteraction(false);

conn.setInstanceFollowRedirects(true);

conn.setRequestMethod("GET");

conn.connect();

if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {

BufferedReader input = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"), 8192);

String line;

while ((line = input.readLine()) != null) {

sb.append(line);

}

input.close();

conn.disconnect();

}

return sb.toString();

}

public static JSONObject getJSONFromUserKey (String key) throws IOException {

try {

String json = HTTPGetFromKey(key);

jObj = new JSONObject(json);

} catch (JSONException e) {

e.printStackTrace();

}

return jObj;

}

Next, we need the UserInfo.java … Read more