找不到符号类“构建器” [英] cannot find symbol class "Builder"

问题描述

我最近下载了 Android Studio ，我认为它有比 eclipse 更多的功能。

I have recently downloaded Android Studio, I thought it has more features than eclipse.

我创建了一个新项目，其中包含登录活动，但似乎活动出现错误：！[在此处输入图像说明] [1]

I created a new project, with a log in activity, but it seems there is an error with the activity :![enter image description here][1]

**Error:(78, 31) error: cannot find symbol class Builder
Error:Execution failed for task ':app:compileDebugJava'.
> Compilation failed; see the compiler error output for details.**

import com.google.android.gms.plus.PlusClient;


    // This is the helper object that connects to Google Play Services.
    private PlusClient mPlusClient;


@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Initialize the PlusClient connection.
        // Scopes indicate the information about the user your application will be able to access.
        mPlusClient =
                new PlusClient.Builder(this, this, this).setScopes(Scopes.PLUS_LOGIN,
                        Scopes.PLUS_ME).build();
    }

推荐答案

这是无法构建PlusClient 和找不到符号类构建器

快速参考：
问题是现在不推荐使用PlayClient，但模板仍采用旧方法。

For Quick Reference: The issue is that the PlayClient is deprecated now but the template still uses the old way.

因此，您可以：

1. 更改gradle中的播放服务版本依赖项（ build.gradle ）从 com.google.android.gms：play-services：6.5.87 到 com.google.android.gms：play-services：6.1.71 。

1. Change the play services version in the gradle dependencies (build.gradle) from com.google.android.gms:play-services:6.5.87 to com.google.android.gms:play-services:6.1.71.

OR

1. 使用此处所述的新方式： http://android-developers.blogspot .in / 2014/02 / new-client-api-model-in-google-play.html 即，而不是创建 PlusClient.Builder 的实例创建一个 GoogleApiClient.Builder 的实例，如下所示：

1. Use the new way as described here:http://android-developers.blogspot.in/2014/02/new-client-api-model-in-google-play.html i.e, instead of creating the instance of PlusClient.Builder create an instance of GoogleApiClient.Builder as shown:

// Builds single client object that connects to Drive and Google+

 import com.google.android.gms.common.api.GoogleApiClient;
 mClient = new GoogleApiClient.Builder(this)
        .addApi(Drive.API)
        .addScope(Drive.SCOPE_FILE)
        .addApi(Plus.API, plusOptions)
        .addScope(Plus.SCOPE_PLUS_LOGIN)
        .addConnectionCallbacks(this)
        .addOnConnectionFailedListener(this)
        .build();      

这篇关于找不到符号类“构建器”的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！