Android™ Requires Chilkat v11.5.0+

Box: Authorize a User with OAuth 2.0

See more Box Examples

Interactive local-development example using a browser and a loopback callback. Register exactly http://localhost:3017/ in the Box User app. Run this in a trusted environment that can hold the client secret. A deployed web app must handle its registered HTTPS callback on the server.

See the Box API guide for setup and the complete workflow.

Android™

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    //  Requires Chilkat 11.5.0 or later and a previously unlocked Chilkat bundle.
    //  See Global Unlock Sample.
    //  Guide: Box API Guide.

    success = false;

    CkOAuth2 oauth2 = new CkOAuth2();
    oauth2.put_ListenPort(3017);
    oauth2.put_AuthorizationEndpoint("https://account.box.com/api/oauth2/authorize");
    oauth2.put_TokenEndpoint("https://api.box.com/oauth2/token");
    oauth2.put_ClientId("BOX_CLIENT_ID");
    oauth2.put_ClientSecret("BOX_CLIENT_SECRET");
    //  Use Box's documented confidential-client authorization-code flow.
    oauth2.put_CodeChallenge(false);
    String url = oauth2.startAuth();
    if (oauth2.get_LastMethodSuccess() != true) {
        Log.i(TAG, oauth2.lastErrorText());
        return;
        }

    success = oauth2.LaunchBrowser(url);
    if (success != true) {
        Log.i(TAG, oauth2.lastErrorText());
        return;
        }

    int elapsedMs = 0;
    while ((elapsedMs < 120000) and (oauth2.get_AuthFlowState() < 3)) {
        oauth2.SleepMs(100);
        elapsedMs = elapsedMs + 100;
        }

    if (oauth2.get_AuthFlowState() < 3) {
        oauth2.Cancel();
        Log.i(TAG, "Authorization timed out.");
        return;
        }

    if (oauth2.get_AuthFlowState() != 3) {
        Log.i(TAG, "Authorization was denied or failed. State: " + String.valueOf(oauth2.get_AuthFlowState()));
        return;
        }

    //  Retain both tokens in your application's protected token store.
    //  The variables below are deliberately not printed.
    String accessToken = oauth2.accessToken();
    String refreshToken = oauth2.refreshToken();
    //  For this local-development example only, save in a directory restricted to this user.
    //  Create qa_data/tokens before running; never put this file under a web root.
    CkJsonObject tokens = new CkJsonObject();
    success = tokens.Load(oauth2.accessTokenResponse());
    if (success != true) {
        Log.i(TAG, tokens.lastErrorText());
        return;
        }

    success = tokens.WriteFile("qa_data/tokens/box_oauth.json");
    if (success != true) {
        Log.i(TAG, tokens.lastErrorText());
        return;
        }

    Log.i(TAG, "Authorization complete; token response saved in the protected local token file.");

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}