相关疑难解决方法(0)

    import com.google.android.gms.common.ConnectionResult;
    import com.google.android.gms.common.GooglePlayServicesClient.ConnectionCallbacks;
    import com.google.android.gms.common.GooglePlayServicesClient.OnConnectionFailedListener;
    import com.google.android.gms.plus.GooglePlusUtil;
    import com.google.android.gms.plus.PlusClient;
    import android.os.Bundle;
    import android.app.Activity;
    import android.app.ProgressDialog;
    import android.content.Intent;
    import android.content.IntentSender.SendIntentException;
    import android.util.Log;
    import android.view.Menu;
    import android.view.View;
    import android.widget.Button;
    import android.widget.Toast;

    public class MainActivity extends Activity implements ConnectionCallbacks,
            OnConnectionFailedListener {

        private static final int REQUEST_CODE_RESOLVE_ERR = 7;
        private ProgressDialog mConnectionProgressDialog;
        private PlusClient mPlusClient;
        private ConnectionResult mConnectionResult;
        private String TAG = "GmailLogin";

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

            int errorCode = GooglePlusUtil.checkGooglePlusApp(this);
            if (errorCode != GooglePlusUtil.SUCCESS) {
                GooglePlusUtil.getErrorDialog(errorCode, this, 0).show(); …

我在android中使用loginActivity.

错误

can not find symbol class Builder

我还导入了文件: com.google.android.gms.plus.PlusClient

这行出错了

mPlusClient = new PlusClient.Builder(this, this, this).setScopes(Scopes.PLUS_LOGIN, Scopes.PLUS_ME).build();

这是来自模板的自动生成的文件.这个错误的原因是什么？

编辑

我正在使用android studio

minSdkVersion 11

targetSdkVersion 21