Google SignIn - Android - 點擊時屏幕凍結

Question

我在其中一個應用中使用Google登錄。我從這個鏈接得到的代碼 - https://www.androidhive.info/2014/02/android-login-with-google-plus-account-1/

我做了一切都很完美，但每當我點擊登錄，應用程序凍結，最終崩潰。

似乎無法弄清楚我做錯了什麼。

這是我的日誌：

Class not found when unmarshalling: com.google.android.gms.auth.api.signin.internal.SignInConfiguration 
             java.lang.ClassNotFoundException: com.google.android.gms.auth.api.signin.internal.SignInConfiguration 
              at java.lang.Class.classForName(Native Method) 
              at java.lang.Class.forName(Class.java:309) 
              at java.lang.Class.forName(Class.java:273) 
              at android.os.Parcel.readParcelableCreator(Parcel.java:2281) 
              at android.os.Parcel.readParcelable(Parcel.java:2245) 
              at android.os.Parcel.readValue(Parcel.java:2152) 
              at android.os.Parcel.readArrayMapInternal(Parcel.java:2485) 
              at android.os.BaseBundle.unparcel(BaseBundle.java:221) 
              at android.os.BaseBundle.containsKey(BaseBundle.java:269) 
              at android.content.Intent.hasExtra(Intent.java:4884) 
              at com.miui.server.XSpaceManagerService.isPublicIntent(XSpaceManagerService.java:174) 
              at com.android.server.am.ActivityStackSupervisorInjector.checkXSpaceControl(ActivityStackSupervisorInjector.java:56) 
              at com.android.server.am.ActivityStackSupervisor.startActivityMayWait(ActivityStackSupervisor.java:897) 
              at com.android.server.am.ActivityManagerService.startActivityAsUser(ActivityManagerService.java:3478) 
              at com.android.server.am.ActivityManagerService.startActivity(ActivityManagerService.java:3465) 
              at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:140) 
              at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:2245) 
              at android.os.Binder.execTransact(Binder.java:446) 
             Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.auth.api.signin.internal.SignInConfiguration" on path: DexPathList[[directory "."],nativeLibraryDirectories=[/vendor/lib64, /system/lib64]] 
              at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 
              at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
              at java.lang.ClassLoader.loadClass(ClassLoader.java:469) 
              at java.lang.Class.classForName(Native Method) 
              at java.lang.Class.forName(Class.java:309) 
              at java.lang.Class.forName(Class.java:273) 

這是我MainActivity.java

package com.example.hitesh.google_login; 

    import android.app.ProgressDialog; 
    import android.content.Intent; 
    import android.graphics.Bitmap; 
    import android.net.Uri; 
    import android.support.annotation.NonNull; 
    import android.support.v7.app.AppCompatActivity; 
    import android.os.Bundle; 
    import android.util.Log; 
    import android.view.View; 
    import android.widget.Button; 
    import android.widget.ImageView; 
    import android.widget.LinearLayout; 
    import android.widget.TextView; 
    import android.widget.Toast; 

    import com.android.volley.toolbox.ImageLoader; 
    import com.android.volley.toolbox.NetworkImageView; 
    import com.bumptech.glide.Glide; 
    import com.bumptech.glide.load.engine.DiskCacheStrategy; 
    import com.google.android.gms.auth.api.Auth; 
    import com.google.android.gms.auth.api.signin.GoogleSignInAccount; 
    import com.google.android.gms.auth.api.signin.GoogleSignInOptions; 
    import com.google.android.gms.auth.api.signin.GoogleSignInResult; 
    import com.google.android.gms.common.ConnectionResult; 
    import com.google.android.gms.common.SignInButton; 
    import com.google.android.gms.common.api.GoogleApiClient; 
    import com.google.android.gms.common.api.OptionalPendingResult; 
    import com.google.android.gms.common.api.ResultCallback; 
    import com.google.android.gms.common.api.Status; 

    import java.nio.BufferUnderflowException; 

    public class MainActivity extends AppCompatActivity implements View.OnClickListener,GoogleApiClient.OnConnectionFailedListener { 

     private static final String TAG = MainActivity.class.getSimpleName(); 
     private static final int RC_SIGN_IN = 007; 

     private GoogleApiClient mGoogleApiClient; 
     private ProgressDialog mProgressDialog; 

     private SignInButton btnSignIn; 
     private Button btnSignOut, btnRevokeAccess; 
     private LinearLayout llProfileLayout; 
     private ImageView imgProfilePic; 
     private TextView txtName, txtEmail; 





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


      btnSignIn = (SignInButton) findViewById(R.id.btn_sign_in); 
      btnSignOut = (Button) findViewById(R.id.btn_sign_out); 
      btnRevokeAccess = (Button) findViewById(R.id.btn_revoke_access); 
      llProfileLayout = (LinearLayout) findViewById(R.id.llProfile); 
      imgProfilePic = (ImageView) findViewById(R.id.imgProfilePic); 
      txtName = (TextView) findViewById(R.id.txtName); 
      txtEmail = (TextView) findViewById(R.id.txtEmail); 

      btnSignIn.setOnClickListener(this); 
      btnSignOut.setOnClickListener(this); 
      btnRevokeAccess.setOnClickListener(this); 

      GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN) 
        .requestEmail() 
        .build(); 

      mGoogleApiClient = new GoogleApiClient.Builder(this) 
        .enableAutoManage(this, this) 
        .addApi(Auth.GOOGLE_SIGN_IN_API, gso) 
        .build(); 

      // Customizing G+ button 
      btnSignIn.setSize(SignInButton.SIZE_STANDARD); 
      btnSignIn.setScopes(gso.getScopeArray()); 


    } 



     private void signIn() { 
      Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient); 
      startActivityForResult(signInIntent, RC_SIGN_IN); 
     } 


     private void signOut() { 
      Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(
        new ResultCallback<Status>() { 
         @Override 
         public void onResult(Status status) { 
          updateUI(false); 
         } 
        }); 
     } 

     private void revokeAccess() { 
      Auth.GoogleSignInApi.revokeAccess(mGoogleApiClient).setResultCallback(
        new ResultCallback<Status>() { 
         @Override 
         public void onResult(Status status) { 
          updateUI(false); 
         } 
        }); 
     } 

     private void handleSignInResult(GoogleSignInResult result) { 
      Log.d(TAG, "handleSignInResult:" + result.isSuccess()); 
      if (result.isSuccess()) { 
       // Signed in successfully, show authenticated UI. 
       GoogleSignInAccount acct = result.getSignInAccount(); 

       Log.e(TAG, "display name: " + acct.getDisplayName()); 

       String personName = acct.getDisplayName(); 
    //   String personPhotoUrl = acct.getPhotoUrl().toString(); 
       String email = acct.getEmail(); 

       // Log.e(TAG, "Name: " + personName + ", email: " + email 
       //  + ", Image: " + personPhotoUrl); 

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


       updateUI(true); 
      } else { 
       // Signed out, show unauthenticated UI. 
       updateUI(false); 
      } 
     } 

     @Override 
     public void onClick(View v) { 
      int id = v.getId(); 

      switch (id) { 
       case R.id.btn_sign_in: 
        signIn(); 
        break; 

       case R.id.btn_sign_out: 
        signOut(); 
        break; 

       case R.id.btn_revoke_access: 
        revokeAccess(); 
        break; 
      } 
     } 

     @Override 
     public void onActivityResult(int requestCode, int resultCode, Intent data) { 
      super.onActivityResult(requestCode, resultCode, data); 

      // Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...); 
      if (requestCode == RC_SIGN_IN) { 
       GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data); 
       handleSignInResult(result); 
      } 
     } 

     @Override 
     public void onStart() { 
      super.onStart(); 

      OptionalPendingResult<GoogleSignInResult> opr = Auth.GoogleSignInApi.silentSignIn(mGoogleApiClient); 
      if (opr.isDone()) { 
       // If the user's cached credentials are valid, the OptionalPendingResult will be "done" 
       // and the GoogleSignInResult will be available instantly. 
       Log.d(TAG, "Got cached sign-in"); 
       GoogleSignInResult result = opr.get(); 
       handleSignInResult(result); 
      } else { 
       // If the user has not previously signed in on this device or the sign-in has expired, 
       // this asynchronous branch will attempt to sign in the user silently. Cross-device 
       // single sign-on will occur in this branch. 
       showProgressDialog(); 
       opr.setResultCallback(new ResultCallback<GoogleSignInResult>() { 
        @Override 
        public void onResult(GoogleSignInResult googleSignInResult) { 
         hideProgressDialog(); 
         handleSignInResult(googleSignInResult); 
        } 
       }); 
      } 
     } 

     @Override 
     public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 
      // An unresolvable error has occurred and Google APIs (including Sign-In) will not 
      // be available. 
      Log.d(TAG, "onConnectionFailed:" + connectionResult); 
     } 

     private void showProgressDialog() { 
      if (mProgressDialog == null) { 
       mProgressDialog = new ProgressDialog(this); 
       mProgressDialog.setMessage(getString(R.string.loading)); 
       mProgressDialog.setIndeterminate(true); 
      } 

      mProgressDialog.show(); 
     } 

     private void hideProgressDialog() { 
      if (mProgressDialog != null && mProgressDialog.isShowing()) { 
       mProgressDialog.hide(); 
      } 
     } 

     private void updateUI(boolean isSignedIn) { 
      if (isSignedIn) { 
       btnSignIn.setVisibility(View.GONE); 
       btnSignOut.setVisibility(View.VISIBLE); 
       btnRevokeAccess.setVisibility(View.VISIBLE); 
       llProfileLayout.setVisibility(View.VISIBLE); 
      } else 
       { 
       btnSignIn.setVisibility(View.VISIBLE); 
       btnSignOut.setVisibility(View.GONE); 
       btnRevokeAccess.setVisibility(View.GONE); 
       llProfileLayout.setVisibility(View.GONE); 
      } 
     } 
    } 

Answer 1

通過同一網站的參考使用我的代碼。它的工作代碼。

的build.gradle

apply plugin: 'com.android.application' 

android { 
    compileSdkVersion 25 
    buildToolsVersion "25.0.2" 
    defaultConfig { 
     applicationId "com.example.admin.logingoogle" 
     minSdkVersion 15 
     targetSdkVersion 25 
     versionCode 1 
     versionName "1.0" 
     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 
} 

dependencies { 
    compile fileTree(dir: 'libs', include: ['*.jar']) 
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
     exclude group: 'com.android.support', module: 'support-annotations' 
    }) 
    compile 'com.android.support:appcompat-v7:25.1.1' 
    compile 'com.google.android.gms:play-services-auth:9.2.1' 
    // glide is added to load the g+ profile image. Ignore if you want 
    compile 'com.github.bumptech.glide:glide:3.7.0' 
    compile "com.squareup.picasso:picasso:2.4.0" 
    testCompile 'junit:junit:4.12' 
} 

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/llProfile" 
    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/imgProfilePic" 
     android:layout_width="80dp" 
     android:layout_height="80dp" 
      /> 

    <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/txtName" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:padding="5dp" 
      android:textSize="20dp" /> 

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

<ImageView 
    android:id="@+id/imgPP" 
    android:layout_width="100dp" 
    android:layout_height="100dp" /> 

MainActivity.java

package com.example.admin.logingoogle; 

import android.app.ProgressDialog; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.media.Image; 
import android.net.Uri; 
import android.os.Bundle; 
import android.support.annotation.NonNull; 
import android.support.v7.app.AppCompatActivity; 
import android.util.Log; 
import android.view.View; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.LinearLayout; 
import android.widget.TextView; 

import com.bumptech.glide.Glide; 
import com.bumptech.glide.load.engine.DiskCacheStrategy; 
import com.google.android.gms.auth.api.Auth; 
import com.google.android.gms.auth.api.signin.GoogleSignInAccount; 
import com.google.android.gms.auth.api.signin.GoogleSignInOptions; 
import com.google.android.gms.auth.api.signin.GoogleSignInResult; 
import com.google.android.gms.common.ConnectionResult; 
import com.google.android.gms.common.SignInButton; 
import com.google.android.gms.common.api.GoogleApiClient; 
import com.google.android.gms.common.api.OptionalPendingResult; 
import com.google.android.gms.common.api.ResultCallback; 
import com.google.android.gms.common.api.Status; 
import com.squareup.picasso.Picasso; 

public class MainActivity extends AppCompatActivity implements 
     View.OnClickListener, 
     GoogleApiClient.OnConnectionFailedListener { 

    private static final String TAG = MainActivity.class.getSimpleName(); 
    private static final int RC_SIGN_IN = 007; 

    private GoogleApiClient mGoogleApiClient; 
    private ProgressDialog mProgressDialog; 

    private SignInButton btnSignIn; 
    private Button btnSignOut, btnRevokeAccess; 
    private LinearLayout llProfileLayout; 
    private ImageView imgProfilePic,imgPP; 
    private TextView txtName, txtEmail; 

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

     btnSignIn = (SignInButton) findViewById(R.id.btn_sign_in); 
     btnSignOut = (Button) findViewById(R.id.btn_sign_out); 
     btnRevokeAccess = (Button) findViewById(R.id.btn_revoke_access); 
     llProfileLayout = (LinearLayout) findViewById(R.id.llProfile); 
     imgProfilePic = (ImageView) findViewById(R.id.imgProfilePic); 
     imgPP = (ImageView) findViewById(R.id.imgPP); 
     txtName = (TextView) findViewById(R.id.txtName); 
     txtEmail = (TextView) findViewById(R.id.txtEmail); 

     btnSignIn.setOnClickListener(this); 
     btnSignOut.setOnClickListener(this); 
     btnRevokeAccess.setOnClickListener(this); 

     GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN) 
       .requestEmail() 
       .build(); 

     mGoogleApiClient = new GoogleApiClient.Builder(this) 
       .enableAutoManage(this, this) 
       .addApi(Auth.GOOGLE_SIGN_IN_API, gso) 
       .build(); 

     // Customizing G+ button 
     btnSignIn.setSize(SignInButton.SIZE_STANDARD); 
     btnSignIn.setScopes(gso.getScopeArray()); 
    } 


    private void signIn() { 
     Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient); 
     startActivityForResult(signInIntent, RC_SIGN_IN); 
    } 


    private void signOut() { 
     Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(
       new ResultCallback<Status>() { 
        @Override 
        public void onResult(Status status) { 
         updateUI(false); 
        } 
       }); 
    } 

    private void revokeAccess() { 
     Auth.GoogleSignInApi.revokeAccess(mGoogleApiClient).setResultCallback(
       new ResultCallback<Status>() { 
        @Override 
        public void onResult(Status status) { 
         updateUI(false); 
        } 
       }); 
    } 

    private void handleSignInResult(GoogleSignInResult result) { 
     Log.d(TAG, "handleSignInResult:" + result.isSuccess()); 
     if (result.isSuccess()) { 
      // Signed in successfully, show authenticated UI. 
      GoogleSignInAccount acct = result.getSignInAccount(); 

      Log.e(TAG, "display name: " + acct.getDisplayName()); 

      String personName = acct.getDisplayName(); 

      Uri personPhotoUrl = acct.getPhotoUrl(); 
      String email = acct.getEmail(); 

      Log.e(TAG, "Name: " + personName + ", email: " + email 
        + ", Image: " + personPhotoUrl); 

      txtName.setText(personName); 
      txtEmail.setText(email); 
      Glide.with(getApplicationContext()) 
        .load(personPhotoUrl) 
        .placeholder(R.mipmap.ic_launcher) 
        .into(imgProfilePic); 
//   if (personPhotoUrl != null) { 
//    Picasso.with(MainActivity.this).load(personPhotoUrl) 
//      .resize(100, 100) 
//      .placeholder(R.mipmap.ic_launcher) 
//      .into(imgProfilePic); 
//   } 
      // imgPP.setImageURI(personPhotoUrl); 

      updateUI(true); 
     } else { 
      // Signed out, show unauthenticated UI. 
      updateUI(false); 
     } 
    } 

    @Override 
    public void onClick(View v) { 
     int id = v.getId(); 

     switch (id) { 
      case R.id.btn_sign_in: 
       signIn(); 
       break; 

      case R.id.btn_sign_out: 
       signOut(); 
       break; 

      case R.id.btn_revoke_access: 
       revokeAccess(); 
       break; 
     } 
    } 

    @Override 
    public void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 

     // Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...); 
     if (requestCode == RC_SIGN_IN) { 
      GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data); 
      handleSignInResult(result); 
     } 
    } 

    @Override 
    public void onStart() { 
     super.onStart(); 

     OptionalPendingResult<GoogleSignInResult> opr = Auth.GoogleSignInApi.silentSignIn(mGoogleApiClient); 
     if (opr.isDone()) { 
      // If the user's cached credentials are valid, the OptionalPendingResult will be "done" 
      // and the GoogleSignInResult will be available instantly. 
      Log.d(TAG, "Got cached sign-in"); 
      GoogleSignInResult result = opr.get(); 
      handleSignInResult(result); 
     } else { 
      // If the user has not previously signed in on this device or the sign-in has expired, 
      // this asynchronous branch will attempt to sign in the user silently. Cross-device 
      // single sign-on will occur in this branch. 
      showProgressDialog(); 
      opr.setResultCallback(new ResultCallback<GoogleSignInResult>() { 
       @Override 
       public void onResult(GoogleSignInResult googleSignInResult) { 
        hideProgressDialog(); 
        handleSignInResult(googleSignInResult); 
       } 
      }); 
     } 
    } 

    @Override 
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 
     // An unresolvable error has occurred and Google APIs (including Sign-In) will not 
     // be available. 
     Log.d(TAG, "onConnectionFailed:" + connectionResult); 
    } 

    private void showProgressDialog() { 
     if (mProgressDialog == null) { 
      mProgressDialog = new ProgressDialog(this); 
      mProgressDialog.setMessage(getString(R.string.loading)); 
      mProgressDialog.setIndeterminate(true); 
     } 

     mProgressDialog.show(); 
    } 

    private void hideProgressDialog() { 
     if (mProgressDialog != null && mProgressDialog.isShowing()) { 
      mProgressDialog.hide(); 
     } 
    } 

    private void updateUI(boolean isSignedIn) { 
     if (isSignedIn) { 
      btnSignIn.setVisibility(View.GONE); 
      btnSignOut.setVisibility(View.VISIBLE); 
      btnRevokeAccess.setVisibility(View.VISIBLE); 
      llProfileLayout.setVisibility(View.VISIBLE); 
     } else { 
      btnSignIn.setVisibility(View.VISIBLE); 
      btnSignOut.setVisibility(View.GONE); 
      btnRevokeAccess.setVisibility(View.GONE); 
      llProfileLayout.setVisibility(View.GONE); 
     } 
    } 
} 

Answer 2

要調用，並在MainActivty UI線程使用登入碼應有你的應用程序線程會一直等待狀態，直到它從google獲得響應。

要解決它，請在單獨的線程中寫入登錄代碼，以便在應用程序請求時阻止它將主UI線程置於等待狀態。這將有助於解決凍結申請的問題。線程文檔可以在這裏看到Thread Documentation。

Answer 3

使用下面的代碼爲谷歌登陸它也可以用自己的自定義按鈕：

public class GoogleLogin extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener{ 
private GoogleApiClient mGoogleApiClient; 
private ProgressDialog mProgressDialog; 
private GoogleSignInOptions googleSignInOptions; 
private ProgressDialog progressDialog; 



@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    googleSignInOptions = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN) 
      .requestEmail() 
      .build(); 
    if(checkPlayServices(this)) { 
     buildGoogleApiClient(googleSignInOptions); 
    } 
    progressDialog=new ProgressDialog(this,R.style.CustomProgressDialog); 
    LivepoolsUtils.showProgressDialog(this,progressDialog); 
    if(Validator.isNotNull(mGoogleApiClient)) { 
     Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient); 
     startActivityForResult(signInIntent, Constants.RC_SIGN_IN); 
    } 

} 


private void buildGoogleApiClient(GoogleSignInOptions googleSignInOptions) { 
    if(Validator.isNull(mGoogleApiClient)){ 
     mGoogleApiClient = new GoogleApiClient.Builder(this) 
       .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */) 
       .addApi(Auth.GOOGLE_SIGN_IN_API, googleSignInOptions) 
       .build(); 
    } 

} 

@Override 
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 

} 

public static boolean checkPlayServices(Context context) { 
    GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance(); 
    int resultCode = apiAvailability.isGooglePlayServicesAvailable(context); 
    if (resultCode != ConnectionResult.SUCCESS) 
    { 
     if (apiAvailability.isUserResolvableError(resultCode)) { 
      apiAvailability.getErrorDialog((GoogleLogin)context, resultCode, Constants.PLAY_SERVICES_RESOLUTION_REQUEST) 
        .show(); 
     } 
     return false; 
    } 
    return true; 
} 

@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 
    if (requestCode == Constants.RC_SIGN_IN) { 
     GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data); 
     handleSignInResult(result); 
    } 
} 

private void handleSignInResult(GoogleSignInResult result) { 
    if (result.isSuccess()) { 
     GoogleSignInAccount acct = result.getSignInAccount(); 
     Toast.makeText(this,acct.getDisplayName(),Toast.LENGTH_LONG).show(); 
     email=acct.getEmail(); 


    } 
    else 
    { 

     finish(); 
    } 
} 



@Override 
protected void onStop() { 
    super.onStop(); 
    if (mProgressDialog != null) { 
     mProgressDialog.dismiss(); 
    } 
} 

@Override 
public void onBackPressed() { 
    super.onBackPressed(); 
    finish(); 
}