Android Open Source - nl.fhict.intellicloud.answers.android Authorization Activity

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License

The source code is released under:

Apache License

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Java Source Code

package nl.fhict.intellicloud.answers;
/*from   ww w . j  av  a  2 s  . c om*/

import nl.fhict.intellicloud.answers.backendcommunication.oauth.AuthenticationManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import android.graphics.*;
import java.util.regex.*;

public class AuthorizationActivity extends Activity {

  public static final String AUTHORIZATION_CODE = "AUTHORIZATION_CODE";
  //The callbackpattern is used to validate whether the url has the authorization code or not
  private final Pattern callbackPattern = Pattern.compile("http://localhost/\\?code=([^\\s&=]*)&authuser=([^\\s&=]*)&prompt=([^\\s&=]*)&session_state=([^\\s&=]*)");
  private ProgressBar progressBar;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.setContentView(R.layout.activity_authorization);
    this.progressBar = (ProgressBar) findViewById(R.id.webViewProgressBar);
    WebView webView = (WebView) findViewById(R.id.webViewAuthorization);
    webView.getSettings().setJavaScriptEnabled(true);
    
    this.loadAuthorization(webView);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.authorization, menu);
    return true;
  }

  /**
   * Starts the webview and checks whether the url contains the authorization code. Everytime the url changes
   * it compares the url with the callbackpattern, till it finds the authorization code.
   * @param webView
   */
  private void loadAuthorization(WebView webView) {
      webView.loadUrl(String.format(
       "https://accounts.google.com/o/oauth2/auth?client_id=%s&response_type=code&scope=%s&redirect_uri=http://localhost",
       AuthenticationManager.CLIENT_ID, 
       AuthenticationManager.SCOPE));
      
      webView.setWebViewClient(new WebViewClient() {
        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
          progressBar.setVisibility(View.VISIBLE);
        }

         @Override
         public boolean shouldOverrideUrlLoading(WebView view, String url) {
           view.loadUrl(url);
           
           Matcher matcher = callbackPattern.matcher(url);
           if(matcher.matches())
             authorizationCodeReceived(matcher.group(1));
           
           return true;
         }
         
         @Override
         public void onPageFinished(WebView view, String url) {
           super.onPageFinished(view, url);
           progressBar.setVisibility(View.INVISIBLE);
         }});
  }
  /**
   * ends the activity and puts the result in the intent
   * @param authorizationCode
   */
  private void authorizationCodeReceived(String authorizationCode) {
    Intent result = new Intent();
    result.putExtra(AUTHORIZATION_CODE, authorizationCode);
    
    setResult(Activity.RESULT_OK, result);
    this.finish();
  }
}

Java Source Code List