Android - Google Login with Login-Screen instead of Automatic Login
Kev*_*sen 10 android login google-api-client google-plus google-play-services
I've added a Google log-in to my Android App (steps can be found at edit 3 of this post). Everything works as it should, but I'd like to make some small adjustments. With the current code found at edit 3, you are automatically logged in every time you start the app, without the Log-in Screen. I want to disable this, since the app will be used on a tablet at work, where a different employee should Login to the app every day.
I started by removing the mGoogleApiClient.connect(); from the onStart() method, and now I have the Google Login button again. When I add mGoogleApiClient.connect(); to the signInWithGoogle() I'm able to sign in with the remembered user.
What I want right now is the default Google Login screen where you can fill in your Google-Email and Password, every time you click on the Login Button, instead of just logging-in the remembered user. (PS: Keep in mind that on my Android Device I currently only have one user at Settings -> Google Accounts, maybe that's why it automatically logs in instead of giving the option to choose which account should be connecting.)
I will test if it makes a different when I have multiple Google Accounts on my Android Device. Ok, I've added a second Google Account to my Android Device, but my app still automatically logs in the remembered user when I click on Sign-In..
EDIT 2:
I haven't been able to find a solution for my problem yet.
我确实找到了一些使用不同方式登录Google的教程,比如使用,AccountManager因此用户可以在设备上选择一个现有的Google帐户.(我今天只阅读了这个方法,所以暂时还没有任何代码示例.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:
- 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.
EDIT 3 (The Code):
Steps I did to make Google Services work so far are below. Now I just need to figure out how to either force the log-in screen or completely log-out which results in the log-in screen every time.
I've followed the following tutorial: http://www.androidhive.info/2014/02/android-login-with-google-plus-account-1/
With extra info used from the following tutorials/sites:
- https://developers.google.com/+/mobile/android/getting-started
- https://developers.google.com/+/mobile/android/sign-in
- http://developer.android.com/google/play-services/setup.html#Setup
This generated the following code:
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>
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:
<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);
}
}
The other steps I did were:
At https://console.developers.google.com/project I've created a project with:
Google+ API on:
And a Client ID created with the correct SHA1 and exact same namespace as the project:
At Eclipse:
I've installed the google-play-services library:
And added it to the project:
I've also created an Emulator with version Google 4.4.2 (so not Android 4.4.2) and also changed the Project to Google 4.4.2 instead of Android 4.4.2:
EDIT 4:
Ok, I have a temporary solution for my own case. In my case the app I'm making should run on a Tablet which is used explicitly for my App. Because this is the case, I can remove all the Google Accounts from the Device Settings the moment someone revokes access (as log out function).
我开始删除以前的更改(重新添加.connect();到onStart()并从中删除signInWithGPlus())
然后我在revokeGPlusAccess-method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.这不适用于您显然不想删除所有设备的Google帐户的个人设备.当您不想删除任何设备的Google帐户时,我仍然想知道一个解决方案.
尝试注销用户，然后重新登录。如果您想强制用户每次都登录，您可以在他们退出应用程序时将其注销。我不建议您更改应用程序注销行为，因为这可能会让用户感到惊讶。
通过运行 Google+ Android 快速入门示例，确保您的开发人员环境设置正确。如果示例应用程序中的登录行为与您所看到的相同，则可能是您的开发环境存在问题（例如 GMS 版本、Android API 版本），或者登录按钮行为不是您所期望的。
最后，您可能会从本文中受益，其中介绍了 Android 登录的一些常见问题点。它涵盖了 Android 登录流程中各种授权和解析步骤的高级视图。
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