(Android™) Yahoo Mail Refresh OAuth2 Access Token

See more Yahoo Mail Examples

Demonstrates how to refresh an OAuth2 Yahoo Mail access token.

For more information, see https://developer.yahoo.com/oauth2/guide/

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// 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);

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // It is assumed we previously obtained an OAuth2 access token.
    // This example loads the JSON access token file 
    // saved by this example: Get Yahoo Mail OAuth2 Access Token

    CkJsonObject jsonToken = new CkJsonObject();
    boolean success = jsonToken.LoadFile("qa_data/tokens/yahooMail.json");
    if (success != true) {
        Log.i(TAG, "Failed to load googleSheets.json");
        return;
        }

    // The access token JSON looks like this:

    // {
    //   "access_token": "kCVQdnOdul...LHucA--",
    //   "refresh_token": "AIenVWETSo0jklFBVkPS8vVm8E.Dj9ToRG.xDbDYmZ55WIs5t6CZhDkD",
    //   "expires_in": 3600,
    //   "token_type": "bearer",
    //   "xoauth_yahoo_guid": "HGDQCVF6JB4YDOWHITPJFBHCWA"
    // }

    CkOAuth2 oauth2 = new CkOAuth2();

    // See Step 5 at https://developer.yahoo.com/oauth2/guide/flows_authcode/
    oauth2.put_TokenEndpoint("https://api.login.yahoo.com/oauth2/get_token");

    // Replace these with actual values.
    oauth2.put_ClientId("CLIENT_ID");
    oauth2.put_ClientSecret("CLIENT_SECRET");

    // Get the "refresh_token"
    oauth2.put_RefreshToken(jsonToken.stringOf("refresh_token"));

    // Send the HTTP POST to refresh the access token..
    success = oauth2.RefreshAccessToken();
    if (success != true) {
        Log.i(TAG, oauth2.lastErrorText());
        return;
        }

    // The response contains a new access token, but we must keep
    // our existing refresh token for when we need to refresh again in the future.
    jsonToken.UpdateString("access_token",oauth2.accessToken());

    // Save the new JSON access token response to a file.
    CkStringBuilder sbJson = new CkStringBuilder();
    jsonToken.put_EmitCompact(false);
    jsonToken.EmitSb(sbJson);
    sbJson.WriteFile("qa_data/tokens/yahooMail.json","utf-8",false);

    Log.i(TAG, "OAuth2 authorization granted!");
    Log.i(TAG, "New Access Token = " + oauth2.accessToken());

  }

  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."
  }
}