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こんにちは、現在 Google サインインをアプリに統合しています。最近、これは私の唯一の懸念であり、何らかの理由で Android Studio が Plus_Login スコープを認識しないことです (これは、アプリが基本的なプロファイル情報などにアクセスするために必要です)。私の現在のエラーはこれです

Error:(40, 17) error: method addScope in class Builder cannot be applied to given types;
required: Scope
found: String
reason: actual argument String cannot be converted to Scope by method invocation conversion

そして、これがエラーが見つかった私のonCreateファイルです

EDIT 1 - import ステートメントと変数宣言を追加

package com.instigate.aggregator06;

import android.content.Intent;
import android.content.IntentSender;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;

import com.google.android.gms.common.ConnectionResult;
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.Scopes;
import com.google.android.gms.common.api.Scope;
import com.google.android.gms.plus.Plus;

public class SocialNetworkActivity extends AppCompatActivity implements
        ConnectionCallbacks, OnConnectionFailedListener, View.OnClickListener {

    private static final String TAG = "Social Network Activity";

    /* 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;

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(Plus.API)
                .addScope(Scopes.PLUS_LOGIN) // <----- This is where the error is found
                .addScope(Scopes.PLUS_ME)
                .build();

        findViewById(R.id.sign_in_button).setOnClickListener(this);
    }

このエラーの解決策を見つけるためにしばらく検索しましたが (Plus_Login スコープが機能している必要があるため)、解決策が見つかりませんでした。

EDIT 2 - 解決後のエラー これに対する答えが見つかりました。どうやら代わりに:

.addScope(Scopes.PLUS_LOGIN)
.addScope(Scopes.PLUS_ME)

私たちはこれを書きます

.addScope(new Scope(Scopes.PLUS_LOGIN))
.addScope(new Scope(Scopes.PLUS_ME))

私の問題を解決しました。

しかし、新たな問題が明らかになりました:

    findViewById(R.id.sign_in_button).setOnClickListener(this);

logcat は、その時点で NullPointerException があることを指摘しています。

編集 3 - NullPointerException の解決 NullPointer Exception の問題を解決しましたが、Google+ サインイン ボタンはまだ機能しません。

これが全体的なクラスです(上記のコードスニペットの続き)

package com.instigate.aggregator06;

import android.content.Intent;
import android.content.IntentSender;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;

import com.google.android.gms.common.ConnectionResult;
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.Scopes;
import com.google.android.gms.common.api.Scope;
import com.google.android.gms.plus.Plus;

public class SocialNetworkActivity extends AppCompatActivity implements
        ConnectionCallbacks, OnConnectionFailedListener, View.OnClickListener {

    private static final String TAG = "Social Network Activity";

    /* 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;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_social_network);

        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(Plus.API)
                //.addScope(Scopes.PLUS_LOGIN)
                //.addScope(Scopes.PLUS_ME)
                .addScope(new Scope(Scopes.PLUS_ME))
                .addScope(new Scope(Scopes.PLUS_LOGIN))
                .build();

        this.findViewById(R.id.sign_in_button).setOnClickListener(this);
    }

    protected void onStart() {
        super.onStart();
        mGoogleApiClient.connect();
    }

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

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

    /* Code in case second one doesn't work

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        // Could not connect to Google Play Services.  The user needs to select an account,
        // grant permissions or resolve an error in order to sign in. Refer to the javadoc for
        // ConnectionResult to see possible error codes.
        Log.d(TAG, "onConnectionFailed:" + connectionResult);

        if (!mIsResolving && mShouldResolve) {
            if (connectionResult.hasResolution()) {
                try {
                    connectionResult.startResolutionForResult(this, RC_SIGN_IN);
                    mIsResolving = true;
                } catch (IntentSender.SendIntentException e) {
                    Log.e(TAG, "Could not resolve ConnectionResult.", e);
                    mIsResolving = false;
                    mGoogleApiClient.connect();
                }
            } else {
                // Could not resolve the connection result, show the user an
                // error dialog.
                showErrorDialog(connectionResult);
            }
        }
    }*/

    public void onConnectionFailed(ConnectionResult result) {
        if (!mIntentInProgress && result.hasResolution()) {
            try {
                mIntentInProgress = true;
                startIntentSenderForResult(result.getResolution().getIntentSender(),
                        RC_SIGN_IN, null, 0, 0, 0);
            } catch (IntentSender.SendIntentException e) {
                // The intent was canceled before it was sent.  Return to the default
                // state and attempt to connect to get an updated ConnectionResult.
                mIntentInProgress = false;
                mGoogleApiClient.connect();
            }
        }
    }

    public void onConnected(Bundle connectionHint) {
        // We've resolved any connection errors.  mGoogleApiClient can be used to
        // access Google APIs on behalf of the user.

        Log.d(TAG, "onConnected:" + connectionHint);
        Intent j = new Intent(SocialNetworkActivity.this, AccountPageActivity.class);
        startActivity(j);

    }

    protected void onActivityResult(int requestCode, int responseCode, Intent intent) {
        if (requestCode == RC_SIGN_IN) {
            mIntentInProgress = false;

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

    public void onConnectionSuspended(int cause) {
        mGoogleApiClient.connect();
    }

    @Override
    public void onClick(View v) {
        if (v.getId() == R.id.sign_in_button) {
            //onSignInClicked();
            mGoogleApiClient.connect();
        }

        // ...
    }

    /* I find this unnecesary

    private void onSignInClicked() {
        // User clicked the sign-in button, so begin the sign-in process and automatically
        // attempt to resolve any errors that occur.
        //mShouldResolve = true;
        mGoogleApiClient.connect();

        // Show a message to the user that we are signing in.
        //mStatusTextView.setText(R.string.signing_in);
    }*/

    public void backToMainPage(View view) {
        Intent j = new Intent(SocialNetworkActivity.this, MainActivity.class);
        startActivity(j);
    }

}

そして、これがそのクラスファイルの私のxmlです

<RelativeLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.instigate.aggregator06.SelectSNActivity"
    android:orientation="vertical"
    android:id="@+id/SelectSNActivity"
    android:weightSum="1">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/backbtn2"
        android:id="@+id/backbtntest"
        android:layout_gravity="right"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_marginBottom="43dp"
        android:onClick="backToMainPage"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="@string/selectSocialNetwork"
        android:id="@+id/selectSocialNetworkHeader"
        android:textStyle="bold"
        android:textSize="36sp"
        android:layout_gravity="center_horizontal"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />

    <com.google.android.gms.common.SignInButton
        android:id="@+id/sign_in_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/selectSocialNetworkHeader"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="52dp" />


</RelativeLayout>

どんな助けでも大歓迎です、ありがとう。

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