Question

我已经在我的Android应用中添加了Google登录（步骤可以在本文的第3页找到）。一切都按预期工作，但我想做一些小的调整。使用编辑3中的当前代码，每次启动应用程序时都会自动登录，而无需登录屏幕。我想禁用它，因为该应用程序将在平板电脑上使用，其中不同的员工应该每天登录应用程序。

我首先从mGoogleApiClient.connect();方法移除了onStart()，现在又重新启用了Google登录按钮。当我向mGoogleApiClient.connect();添加signInWithGoogle()时，我可以使用记住的用户登录。

我现在想要的是默认的Google登录屏幕，您可以在每次单击“登录”按钮时填写Google电子邮件和密码，而不是仅登录记住的用户。（PS：请记住，在我的Android设备上，我目前只有Settings -> Google Accounts的用户，也许这就是为什么它会自动登录而不是选择选择应该连接的帐户。）< / p>

~~如果我的Android设备上有多个Google帐户，我会测试它是否会有所不同。~~好的，我已经在我的Android设备上添加了第二个Google帐户，但我的应用仍然当我点击登录时自动登录记住的用户..

编辑2：

我还没能找到解决问题的方法。

我确实找到了一些使用不同方式登录Google的教程，例如使用AccountManager，因此用户可以在设备上选择一个现有的Google帐户。（我今天只读过这种方法，所以暂时还没有代码示例。但这也不是我想要的。）

我可能已在上面的帖子中说清楚了，但这是我想要在图片中解释的内容：

用户在他/她的Android设备上启动应用程序。
用户输入他的Google帐户用户名（使用过的电子邮件）和密码
用户成功登录后，我们可以使用该应用程序执行其他操作

PS：为了确保这个登录屏幕是Google本身的屏幕。所以它不是我自己创建的登录屏幕。理论上这使我能够保存输入的密码，这违反了Google OAuth的协议。

编辑3（守则）：

到目前为止，我所做的使Google服务工作的步骤如下。现在我只需要弄清楚如何强制登录屏幕或完全注销，每次都会导致登录屏幕。

我已按照以下教程： http://www.androidhive.info/2014/02/android-login-with-google-plus-account-1/

使用以下教程/网站中的额外信息：

这产生了以下代码：

的AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.testproject_gmaillogin"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="9"
        android:targetSdkVersion="19" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.USE_CREDENTIALS" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />

        <activity
            android:name="com.example.testproject_gmaillogin.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

的strings.xml：

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">TestProject_GmailLogin</string>
    <string name="action_settings">Settings</string>

    <string name="profile_pic_description">Google Profile Picture</string>
    <string name="btn_logout_from_google">Logout from Google</string>
    <string name="btn_revoke_access">Revoke Access</string>

</resources>

activity_main.xml中：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MainActivity" >

    <LinearLayout
        android:id="@+id/profile_layout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:orientation="horizontal"
        android:weightSum="3"
        android:visibility="gone">

        <ImageView
            android:id="@+id/img_profile_pic"
            android:contentDescription="@string/profile_pic_description"
            android:layout_width="80dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"/>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:orientation="vertical"
            android:layout_weight="2" >

            <TextView
                android:id="@+id/txt_name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="5dp"
                android:textSize="20sp" />

            <TextView
                android:id="@+id/txt_email"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="5dp"
                android:textSize="18sp" />
        </LinearLayout>
    </LinearLayout>

    <com.google.android.gms.common.SignInButton
        android:id="@+id/btn_sign_in"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"/>

    <Button
        android:id="@+id/btn_sign_out"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/btn_logout_from_google"
        android:visibility="gone"
        android:layout_marginBottom="10dp"/>

    <Button
        android:id="@+id/btn_revoke_access"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/btn_revoke_access"
        android:visibility="gone" />

</LinearLayout>

MainActivity.java：

package com.example.testproject_gmaillogin;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.plus.Plus;
import com.google.android.gms.plus.model.people.Person;

import android.support.v7.app.ActionBarActivity;
import android.content.Intent;
import android.content.IntentSender.SendIntentException;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity implements ConnectionCallbacks, OnConnectionFailedListener, OnClickListener
{
    // Logcat tag
    private static final String TAG = "MainActivity";

    // Profile pix image size in pixels
    private static final int PROFILE_PIC_SIZE = 400;

    // Request code used to invoke sign in user interactions
    private static final int RC_SIGN_IN = 0;

    // Client used to interact with Google APIs
    private GoogleApiClient mGoogleApiClient;

    // A flag indicating that a PendingIntent is in progress and prevents
    // us from starting further intents
    private boolean mIntentInProgress;

    // Track whether the sign-in button has been clicked so that we know to resolve
    // all issues preventing sign-in without waiting
    private boolean mSignInClicked;

    // Store the connection result from onConnectionFailed callbacks so that we can
    // resolve them when the user clicks sign-in
    private ConnectionResult mConnectionResult;

    // The used UI-elements
    private SignInButton btnSignIn;
    private Button btnSignOut, btnRevokeAccess;
    private ImageView imgProfilePic;
    private TextView txtName, txtEmail;
    private LinearLayout profileLayout;

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

        // Get the UI-elements
        btnSignIn = (SignInButton) findViewById(R.id.btn_sign_in);
        btnSignOut = (Button) findViewById(R.id.btn_sign_out);
        btnRevokeAccess = (Button) findViewById(R.id.btn_revoke_access);
        imgProfilePic = (ImageView) findViewById(R.id.img_profile_pic);
        txtName = (TextView) findViewById(R.id.txt_name);
        txtEmail = (TextView) findViewById(R.id.txt_email);
        profileLayout = (LinearLayout) findViewById(R.id.profile_layout);

        // Set the Button onClick-listeners
        btnSignIn.setOnClickListener(this);
        btnSignOut.setOnClickListener(this);
        btnRevokeAccess.setOnClickListener(this);

        mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(Plus.API, null)
            .addScope(Plus.SCOPE_PLUS_LOGIN)
            .build();
    }

    @Override
    protected void onStart(){
        super.onStart();
        mGoogleApiClient.connect(); // <- REMOVED (EDIT 4: Added again)
    }

    @Override
    protected void onStop(){
        super.onStop();

        if(mGoogleApiClient.isConnected())
            mGoogleApiClient.disconnect();
    }

    @Override
    public void onClick(View view){
        switch(view.getId()){
            case R.id.btn_sign_in:
                signInWithGPlus();
                break;
            case R.id.btn_sign_out:
                signOutFromGPlus();
                break;
            case R.id.btn_revoke_access:
                revokeGPlusAccess();
                break;
        }
    }

    @Override
    public void onConnectionFailed(ConnectionResult result) {
        if(!result.hasResolution()){
            GooglePlayServicesUtil.getErrorDialog(result.getErrorCode(), this, 0).show();
            return;
        }

        if(!mIntentInProgress){
            // Store the ConnectionResult so that we can use it later when the user clicks 'sign-in'
            mConnectionResult = result;

            if(mSignInClicked)
                // The user has already clicked 'sign-in' so we attempt to resolve all
                // errors until the user is signed in, or they cancel
                resolveSignInErrors();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int responseCode, Intent intent){
        if(requestCode == RC_SIGN_IN && responseCode == RESULT_OK)
            SignInClicked = true;

            mIntentInProgress = false;

            if(!mGoogleApiClient.isConnecting())
                mGoogleApiClient.connect();
        }
    }

    @Override
    public void onConnected(Bundle connectionHint) {
        mSignInClicked = false;
        Toast.makeText(this, "User is connected!", Toast.LENGTH_LONG).show();

        // Get all the user's information
        getProfileInformation();

        // Update the UI after sign-in
        updateUI(true);
    }

    @Override
    public void onConnectionSuspended(int cause){
        mGoogleApiClient.connect();
        updateUI(false);
    }

    // Updating the UI, showing/hiding buttons and profile layout
    private void updateUI(boolean isSignedIn){
        if(isSignedIn){
            btnSignIn.setVisibility(View.GONE);
            btnSignOut.setVisibility(View.VISIBLE);
            btnRevokeAccess.setVisibility(View.VISIBLE);
            profileLayout.setVisibility(View.VISIBLE);
        }
        else{
            btnSignIn.setVisibility(View.VISIBLE);
            btnSignOut.setVisibility(View.GONE);
            btnRevokeAccess.setVisibility(View.GONE);
            profileLayout.setVisibility(View.GONE);
        }
    }

    // Sign-in into Google
    private void signInWithGPlus(){
        //if(!mGoogleApiClient.isConnecting()) // <- ADDED (EDIT 4: Removed again)
            //mGoogleApiClient.connect(); // <- ADDED (EDIT 4: Removed again)

        if(!mGoogleApiClient.isConnecting()){
            mSignInClicked = true;
            resolveSignInErrors();
        }
    }

    // Method to resolve any sign-in errors
    private void resolveSignInErrors(){
        if(mConnectionResult.hasResolution()){
            try{
                mIntentInProgress = true;

                //Toast.makeText(this, "Resolving Sign-in Errors", Toast.LENGTH_SHORT).show();

                mConnectionResult.startResolutionForResult(this, RC_SIGN_IN);
            }
            catch(SendIntentException e){
                // The intent was cancelled before it was sent. Return to the default
                // state and attempt to connect to get an updated ConnectionResult
                mIntentInProgress = false;
                mGoogleApiClient.connect();
            }
        }
    }

    // Fetching the user's infromation name, email, profile pic
    private void getProfileInformation(){
        try{
            if(Plus.PeopleApi.getCurrentPerson(mGoogleApiClient) != null){
                Person currentPerson = Plus.PeopleApi.getCurrentPerson(mGoogleApiClient);
                String personName = currentPerson.getDisplayName();
                String personPhotoUrl = currentPerson.getImage().getUrl();
                String personGooglePlusProfile = currentPerson.getUrl();
                String personEmail = Plus.AccountApi.getAccountName(mGoogleApiClient);

                Log.e(TAG, "Name: " + personName + ", "
                        + "plusProfile: " + personGooglePlusProfile + ", "
                        + "email: " + personEmail + ", "
                        + "image: " + personPhotoUrl);

                txtName.setText(personName);
                txtEmail.setText(personEmail);

                // by default the profile url gives 50x50 px image,
                // but we can replace the value with whatever dimension we
                // want by replacing sz=X
                personPhotoUrl = personPhotoUrl.substring(0, personPhotoUrl.length() - 2)
                        + PROFILE_PIC_SIZE;

                new LoadProfileImage(imgProfilePic).execute(personPhotoUrl);
            }
            else{
                Toast.makeText(getApplicationContext(), "Person information is null", Toast.LENGTH_LONG).show();
            }
        }
        catch(Exception ex){
            ex.printStackTrace();
        }
    }

    // Sign-out from Google
    private void signOutFromGPlus(){
        if(mGoogleApiClient.isConnected()){
            Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
            mGoogleApiClient.disconnect();
            mGoogleApiClient.connect();
            updateUI(false);
        }
    }

    // Revoking access from Google
    private void revokeGPlusAccess(){
        if(mGoogleApiClient.isConnected()){
            Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
            Plus.AccountApi.revokeAccessAndDisconnect(mGoogleApiClient)
                .setResultCallback(new ResultCallback<Status>(){
                    @Override
                    public void onResult(Status s){
                        Log.e(TAG, "User access revoked!");
                        mGoogleApiClient.connect();
                        updateUI(false);
                    }
                });
        }
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings)
            return true;

        return super.onOptionsItemSelected(item);
    }
}

LoadProfileImage.java：

package com.example.testproject_gmaillogin;

import java.io.InputStream;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.ImageView;

/**
 * Background async task to load user profile picture from url
 **/
public class LoadProfileImage extends AsyncTask<String, Void, Bitmap> {
    private ImageView bmImage;

    public LoadProfileImage(ImageView bmImage){
        this.bmImage = bmImage;
    }

    @Override
    protected Bitmap doInBackground(String... urls){
        String urlDisplay = urls[0];
        Bitmap mIcon11 = null;
        try{
            InputStream in = new java.net.URL(urlDisplay).openStream();
            mIcon11 = BitmapFactory.decodeStream(in);
        }
        catch(Exception ex){
            Log.e("Error", ex.getMessage());
            ex.printStackTrace();
        }
        return mIcon11;
    }

    @Override
    protected void onPostExecute(Bitmap result){
        bmImage.setImageBitmap(result);
    }
}

我做的其他步骤是：

在https://console.developers.google.com/project我创建了一个项目：

Google+ API：

Google+ API on

使用正确的SHA1创建的客户端ID以及与项目完全相同的命名空间：

And a Client ID created with the correct SHA1

在Eclipse：

我已经安装了google-play-services库：

Google-play services installed

并将其添加到项目中：

Google-play services library added (2)

我还创建了一个版本为Google 4.4.2的模拟器（所以不是Android 4.4.2），并且还将项目更改为Google 4.4.2而不是Android 4.4.2：

Solution Error Solution Error Emulator

编辑4：

好的，我有自己案例的临时解决方案。在我的情况下，我制作的应用程序应该在平板电脑上运行，该平板电脑明确用于我的应用程序。因为是这种情况，我可以在有人撤销访问权限时从设备设置中删除所有Google帐户（作为退出功能）。

我首先删除了之前的更改（将.connect();重新添加到onStart()并将其从signInWithGPlus()中删除）

然后我在revokeGPlusAccess - 方法中添加了一行：

// Revoking access from Google
private void revokeGPlusAccess(){
    if(mGoogleApiClient.isConnected()){
        Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
        Plus.AccountApi.revokeAccessAndDisconnect(mGoogleApiClient)
            .setResultCallback(new ResultCallback<Status>(){
                @Override
                public void onResult(Status s){
                    Log.e(TAG, "User access revoked!");
                    removeAllGoogleAccountsFromDevice(); // <- Added
                    mGoogleApiClient.connect();
                    updateUI(false);
                }
            });
    }
}

使用以下方法：

// Method to remove ALL Google Accounts from the Android Device
private void removeAllGoogleAccountsFromDevice(){
    // Ask if this really is what you want
    new AlertDialog.Builder(MainActivity.mActivity)
        .setMessage("Are you sure you want to delete all Google Accounts from this Android Device?\r\n\r\n" +
                "WARNING: If you run this app on the Work Tablet, click YES. If you run this on your own device, it's recommended to click NO.")
        .setCancelable(false)
        .setPositiveButton("Yes, continue", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // AccountManager is final because we use it in the separate Thread below
                final AccountManager accountManager = AccountManager.get(MainActivity.this);
                Account[] googleAccounts = accountManager.getAccountsByType(GoogleAuthUtil.GOOGLE_ACCOUNT_TYPE);
                // Account is final because we use it in the separate Thread below
                for(final Account a : googleAccounts){
                    // Separate Thread because AccountManager #removeAccount is an async operation
                    Thread worker = new Thread(new Runnable() {
                        @Override
                        public void run() {
                            accountManager.removeAccount(a, null, null);
                        }
                    });
                    worker.start();
                }
            }
        })
        .setNegativeButton("No", null)
        .show();
}

不过，这只适用于我的情况。这不会在个人设备上工作，您显然不想删除所有设备的Google帐户。如果您不想删除任何设备的Google帐户，我仍然想知道一个解决方案。

Answer 1

正确答案是here。

需要致电mClient.clearDefaultAccountAndReconnect()以清除以前缓存的帐户每次用户点击登录按钮时都这样做是很好的做法，这样每次都会向用户显示他的所有帐户。

Answer 2

尝试signing out the user，然后再次登录该用户。如果您想强制用户每次都登录，只要他们退出应用程序就可以签名。我不建议您更改应用退出行为，因为它可能会让用户感到惊讶。

确保running the Google+ Android Quickstart sample正确设置了开发人员环境。如果示例应用中的登录行为与您所看到的相同，则说明您的开发环境存在问题（例如GMS版本，Android API版本）或登录按钮行为不符合您的预期是。

最后，您可以从this article which covers a few common problem spots with Android Sign-In中受益。它涵盖了Android登录流程中各种授权和解决步骤的高级视图。

Answer 3

退出无法帮助您解决问题。每当您退出应用程序或每次要从应用程序注销并再次登录时，您都必须撤消访问权限。所以，只需在退出应用中按后退方法调用撤消访问方法，如下所示：

 @Override
    public void onBackPressed() {
       Log.d("CDA", "onBackPressed Called");
       revokeGplusAccess();
       super.onBackPressed();
    }

这肯定会解决您的问题。

Android - 使用登录屏幕登录Google而不是自动登录

3 个答案: