谷歌登录签名的apk不起作用

好吧，所有工作，直到我生成签名的apk。我按照谷歌开发人员页面上的指示遵循了整个过程

1.我生成了带有键哈希和包名称的
google-services.json文件 2.包括所有类级别和应用程序级别的依赖项，如下所示

// Top-level build file where you can add configuration options common to all sub-projects/modules.

 buildscript {
repositories {
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:1.3.0'
    classpath 'com.google.gms:google-services:2.0.0-alpha6'

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}
}
 allprojects {
  repositories {
     jcenter()
   }
  }

应用程序级别文件

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

android {
compileSdkVersion 23
buildToolsVersion "23.0.0"

defaultConfig {
    applicationId "com.example.skmishra.finalgooglesignin"
    minSdkVersion 14
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'),          'proguard-rules.pro'
    }
   }
}

 dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.google.android.gms:play-services:8.3.0'


}

4. 我的登录 java 代码

   package com.example.skmishra.finalgooglesignin;
   
   import android.content.Intent;
   import android.support.v7.app.AppCompatActivity;
   import android.os.Bundle;
   import android.util.Log;
   import android.view.Menu;
   import android.view.MenuItem;
   import android.view.View;
   import android.widget.Button;
   import android.widget.Toast;
   
   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;
   
   public class MainActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener, View.OnClickListener {
   
       private static final int RC_SIGN_IN = 200 ;
       private static final String TAG = "Sign In" ;
       private GoogleApiClient mGoogleApiClient;
      SignInButton google;
   
   
       @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);
           // Configure sign-in to request the user's ID, email address, and basic
   // profile. ID and basic profile are included in DEFAULT_SIGN_IN.
           GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                   .requestEmail()
                   .build();
           mGoogleApiClient = new GoogleApiClient.Builder(this)
                   .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
                   .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
                   .build();
           SignInButton signInButton = (SignInButton) findViewById(R.id.sign_in_button);
           signInButton.setSize(SignInButton.SIZE_STANDARD);
           signInButton.setScopes(gso.getScopeArray());
           google=(SignInButton)findViewById(R.id.sign_in_button);
           google.setOnClickListener(this);
   
   
       }
   
   
       @Override
       public void onConnectionFailed(ConnectionResult connectionResult) {
           Toast.makeText(this,"Failed to connect",Toast.LENGTH_LONG).show();
       }
   
       @Override
       public void onClick(View v) {
           switch (v.getId()) {
               case R.id.sign_in_button:
                   signIn();
                   break;
               // ...
           }
       }
   
       private void signIn() {
           Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
           startActivityForResult(signInIntent, RC_SIGN_IN);
       }
       @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);
           }
       }
   
       private void handleSignInResult(GoogleSignInResult result) {
           Log.d(TAG, "handleSignInResult:" + result.isSuccess());
           if (result.isSuccess()) {
               // Signed in successfully, show authenticated UI.
               GoogleSignInAccount acct = result.getSignInAccount();
               Toast.makeText(this,"Name :"+acct.getDisplayName()+" Email :"+acct.getEmail(),Toast.LENGTH_LONG).show();
           } else {
               // Signed out, show unauthenticated UI.
               Toast.makeText(this,"Signed out ",Toast.LENGTH_LONG).show();
           }
       }
   }
   

   5. 我的布局代码

          <com.google.android.gms.common.SignInButton
              android:id="@+id/sign_in_button"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="Check this out"
      
              />