Android Open Source - google_oauth2_android_example Google Login Activity

• Back to Example/sample  ↑

From Project

Back to project page google_oauth2_android_example.

License

The source code is released under:

Apache License

Java Source Code

package com.example.oauth;
/* w ww  .  j a va 2  s  .co m*/
import java.io.IOException;

import com.example.oauth.fragment.SelectAccountDialogFragment;
import com.example.oauth.fragment.SelectAccountDialogFragment.SelectAccountDialogProtocol;
import com.loopj.android.http.*;

import android.os.Bundle;
import android.accounts.*;
import android.app.Activity;
import android.app.DialogFragment;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

public class GoogleLoginActivity extends Activity implements SelectAccountDialogProtocol {
  private AccountManager mAccountManager;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_google_login);

    findViewById(R.id.google_login_button).setOnClickListener(
        new View.OnClickListener() {

          @Override
          public void onClick(View view) {
            selectAccount();
          }
        });
  }

  private void selectAccount() {
    mAccountManager = AccountManager.get(GoogleLoginActivity.this);
    Account[] accounts = mAccountManager.getAccountsByType("com.google");
    
    if (accounts.length == 0) {
      Toast.makeText(getApplicationContext(), R.string.no_account_found_message, Toast.LENGTH_SHORT).show();
    } else if (accounts.length == 1) {
      getTokenForAccount(accounts[0]);
    } else {
      String[] accountNames = new String[accounts.length];
      
      for (int i = 0; i < accounts.length; i++) {
        accountNames[i] = accounts[i].name;
      }
      
      DialogFragment newFragment = SelectAccountDialogFragment.newInstance(R.string.select_account_dialog_title, accountNames);
      newFragment.show(getFragmentManager(), "dialog");
    }
  }

  public void gotAccount(int index) {
    Account[] accounts = mAccountManager.getAccountsByType("com.google");
    getTokenForAccount(accounts[index]);
  }
  
  @Override
  public void onBackPressed() {
    // Exit gracefully by starting OS Home Activity
    Intent setIntent = new Intent(Intent.ACTION_MAIN);
    setIntent.addCategory(Intent.CATEGORY_HOME);
    setIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(setIntent);
  }
  
  private void getTokenForAccount(Account account) {
    Bundle options = new Bundle();

    mAccountManager.getAuthToken(
        account, 
        "oauth2:https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/userinfo.email", 
        options, 
        this, 
        new OnTokenAcquired(), 
        null
        );
  }
  
  private class OnTokenAcquired implements AccountManagerCallback<Bundle> {
    @Override
    public void run(AccountManagerFuture<Bundle> result) {

      Bundle bundle = null;
      try {
        bundle = result.getResult();
        
        String token = bundle.getString(AccountManager.KEY_AUTHTOKEN);
        Intent launch = (Intent) result.getResult().get(AccountManager.KEY_INTENT);
        
        if (launch != null) {
          startActivityForResult(launch, 0);
          return;
        }
        
        requestAPIKeyFromOAuthToken(token);
      } catch (OperationCanceledException e) {
        e.printStackTrace();
      } catch (AuthenticatorException e) {
        e.printStackTrace();
      } catch (IOException e) {
        e.printStackTrace();
      }

    }
  }

  private void requestAPIKeyFromOAuthToken(String token) {
    AsyncHttpClient client = new AsyncHttpClient();
    RequestParams params = new RequestParams("token", token);
    
    client.post("https://myrailsapp.com/api/v1/auth/verify", params, new AsyncHttpResponseHandler() {
      @Override
      public void onSuccess(String response) {
        Log.w("OAUTH", "Got API key from server: " + response);
        finish();
      }
      
      @Override
      public void onFailure(Throwable e) {
        Log.w("OAUTH", "Error getting API key");
        Toast.makeText(getApplicationContext(), R.string.connection_error_message, Toast.LENGTH_LONG).show();
        
        e.printStackTrace();
      }
    });
  }
}

Java Source Code List

• Back to Example/sample  ↑