A quick example of retrieving an access token with GoogleAuthUtil

RetrieveAccessTokenActivity.java

package com.google.devrel.samples.gmstest.app;

import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;

import com.google.android.gms.auth.GoogleAuthException;
import com.google.android.gms.auth.GoogleAuthUtil;
import com.google.android.gms.auth.UserRecoverableAuthException;
import com.google.android.gms.plus.Account;
import com.google.android.gms.plus.Plus;

import java.io.IOException;


public class RetrieveAccessTokenActivity extends Activity implements View.OnClickListener {

    private static final String TAG = "RetrieveAccessToken";
    private static final int REQ_SIGN_IN_REQUIRED = 55664;

    private String mAccountName;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_retrieve_access_token);
        findViewById(R.id.button_token).setOnClickListener(this);

        // Manual integration? Pop an account chooser to get this:
        mAccountName = "me@example.com";
        // Or if you have a GoogleApiClient connected:
        // mAccountName = Plus.AccountApi.getAccountName(mGoogleApiClient);
    }

    @Override
    public void onClick(View view) {
        if (view.getId() == R.id.button_token) {
            new RetrieveTokenTask().execute(mAccountName);
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQ_SIGN_IN_REQUIRED && resultCode == RESULT_OK) {
            // We had to sign in - now we can finish off the token request.
            new RetrieveTokenTask().execute(mAccountName);
        }
    }

    private class RetrieveTokenTask extends AsyncTask<String, Void, String> {

        @Override
        protected String doInBackground(String... params) {
            String accountName = params[0];
            String scopes = "oauth2:profile email";
            String token = null;
            try {
                token = GoogleAuthUtil.getToken(getApplicationContext(), accountName, scopes);
            } catch (IOException e) {
                Log.e(TAG, e.getMessage());
            } catch (UserRecoverableAuthException e) {
                startActivityForResult(e.getIntent(), REQ_SIGN_IN_REQUIRED);
            } catch (GoogleAuthException e) {
                Log.e(TAG, e.getMessage());
            }
            return token;
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            ((TextView) findViewById(R.id.token_value)).setText("Token Value: " + s);
        }
    }
}

thank you very much. I still haven't learned the finer aspects of Google's Dev doc's and spent all day trying to get their tutorials to run. Then I came across this example, 5 min and boom I got exactly what I need. Thank you again.

String scopes = "oauth2:profile email";

Does this well truly, honest-to-god work properly? Everything I have attempted has shown that it does not work reliably. Sometimes it works, sometimes it doesn't. It's driving me insane. Could it be something to do with my GoogleApiClient.Builder object?

Sometimes, I get two permissions screens: one for the whole mess of Google Plus permissions (circles, etcetc), and then the "basic" permission right after. Sometimes, it's just the first one, and then the running the authentication token gives me "invalid permissions", etc.

http://stackoverflow.com/questions/27239405/googleauthutil-get-access-token-that-will-provide-an-email-address

That really helped! Thanks a bunch

@agamemnus the reason you get two permission screens is due to this catch block

catch (UserRecoverableAuthException e) {
startActivityForResult(e.getIntent(), REQ_SIGN_IN_REQUIRED);
}

if the app doesn't have the necessary permissions, this will launch a new screen. You need to handle the new connection and attempt to retrieve the token again if the second screen opens up.

Thanks a Ton. It saved lot of time.

Due to this site is in the top of Google search ("GoogleApiClient get token") I wanna write this methods are deprecated!
Do not waste your time to use this code (Feb 2016).

yurevich1, thanks for the warning, but which is right method then? I'm searching for a complete solution.

@X-Strange did someone found the new to retrieve the access toke, cause getToken() is deprecated

I got an issue on this link https://github.com/playgameservices/play-games-plugin-for-unity/issues/1328 guys. Please help

Worked like a charm ... thank you so much.

Worked.But with that Access token i could not be able to receive the Contact list .
Please give me solution if you can.
Thanks in advance

@ianbarber thank you very much.That really helped #