Android Open Source - android-foursquare-client O Auth Access Token Activity

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License

The source code is released under:

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions...

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Java Source Code

package com.ecs.android.foursquare.oauth2;
/* w  ww. j ava  2s .  c o  m*/
import java.io.IOException;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import com.ecs.android.foursquare.FoursquareApiSample;
import com.ecs.android.foursquare.oauth2.store.CredentialStore;
import com.ecs.android.foursquare.oauth2.store.SharedPreferencesCredentialStore;
import com.google.api.client.auth.oauth2.draft10.AccessTokenRequest.AuthorizationCodeGrant;
import com.google.api.client.auth.oauth2.draft10.AccessTokenResponse;
import com.google.api.client.auth.oauth2.draft10.AuthorizationRequestUrl;
import com.google.api.client.http.HttpResponseException;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.jackson.JacksonFactory;

/**
 * Execute the OAuthRequestTokenTask to retrieve the request, and authorize the request.
 * After the request is authorized by the user, the callback URL will be intercepted here.
 * 
 */
public class OAuthAccessTokenActivity extends Activity {

  final String TAG = getClass().getName();
  
  private SharedPreferences prefs;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
        Log.i(TAG, "Starting task to retrieve request token.");
        this.prefs = PreferenceManager.getDefaultSharedPreferences(this);
  }
  
  @Override
  protected void onResume() {
    super.onResume();
    WebView webview = new WebView(this);
        webview.getSettings().setJavaScriptEnabled(true);  
        webview.setVisibility(View.VISIBLE);
        setContentView(webview);
        
        /* WebViewClient must be set BEFORE calling loadUrl! */  
        webview.setWebViewClient(new WebViewClient() {  

          @Override  
            public void onPageStarted(WebView view, String url,Bitmap bitmap)  {  
            System.out.println("onPageStarted : " + url);
            }
          @Override  
            public void onPageFinished(WebView view, String url)  {  
              
              if (url.startsWith(OAuth2ClientCredentials.REDIRECT_URI)) {
                try {
            
                  if (url.indexOf("code=")!=-1) {
                  
                    String code = extractCodeFromUrl(url);
              
                        AuthorizationCodeGrant request = new AuthorizationCodeGrant(new NetHttpTransport(),
                                new JacksonFactory(),
                                OAuth2ClientCredentials.ACCESS_TOKEN_URL,
                                OAuth2ClientCredentials.CLIENT_ID, 
                                OAuth2ClientCredentials.CLIENT_SECRET,
                                code,
                                OAuth2ClientCredentials.REDIRECT_URI);
                            AccessTokenResponse accessTokenResponse = request.execute();

                            CredentialStore credentialStore = new SharedPreferencesCredentialStore(prefs);
              credentialStore.write(accessTokenResponse );
                    view.setVisibility(View.INVISIBLE);
                    startActivity(new Intent(OAuthAccessTokenActivity.this,FoursquareApiSample.class));
                  } else if (url.indexOf("error=")!=-1) {
                    view.setVisibility(View.INVISIBLE);
                    new SharedPreferencesCredentialStore(prefs).clearCredentials();
                    startActivity(new Intent(OAuthAccessTokenActivity.this,FoursquareApiSample.class));
                  }
                  
          } catch (HttpResponseException e) {
            try {
              System.out.println("Error occured " + e.response.parseAsString());
            } catch (IOException e1) {
              e1.printStackTrace();
            }
          } catch (Exception e) {
              e.printStackTrace();
            }

              }
                System.out.println("onPageFinished : " + url);
            
            }
      private String extractCodeFromUrl(String url) {
        return url.substring(OAuth2ClientCredentials.REDIRECT_URI.length()+6,url.length());
      }  
        });  
        
        AuthorizationRequestUrl authorizationRequestUrl = new AuthorizationRequestUrl(OAuth2ClientCredentials.AUTHORIZATION_URL);
    authorizationRequestUrl.clientId = OAuth2ClientCredentials.CLIENT_ID;
    authorizationRequestUrl.redirectUri = OAuth2ClientCredentials.REDIRECT_URI;
        webview.loadUrl(authorizationRequestUrl.build());    
  }

}

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