java Google Drive 未解析的导入

Google Drive Unresolved Imports

提问by John Roberts

I am trying to compile Stephen Wylie's example code for Google Drive integration:

我正在尝试为 Google Drive 集成编译 Stephen Wylie 的示例代码：

package com.googledrive.googledriveapp;
// For Google Drive / Play Services
// Version 1.1 - Added new comments & removed dead code
// Stephen Wylie - 10/20/2012
import android.accounts.Account;
import android.accounts.AccountManager;
import android.app.Activity;

import com.google.android.gms.auth.GoogleAuthException;
import com.google.android.gms.auth.GoogleAuthUtil;
import com.google.android.gms.auth.UserRecoverableAuthException;
import com.google.android.gms.common.AccountPicker;
import com.google.api.client.auth.oauth2.BearerToken;
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.android2.AndroidHttp;
import com.google.api.client.googleapis.extensions.android2.auth.GoogleAccountManager;
import com.google.api.client.http.HttpRequestFactory;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.json.JsonHttpRequest;
import com.google.api.client.http.json.JsonHttpRequestInitializer;
import com.google.api.client.json.Hymanson.HymansonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.Drive.Files;
import com.google.api.services.drive.DriveRequest;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.File;
import com.google.api.services.drive.model.FileList;

public class MainActivity extends Activity {

    private Button btn_drive;
    private Context ctx = this;
    private Activity a = this;

    public void onCreate(Bundle savedInstanceState) {

        /*
         * Etc... (Other application logic belonging in onCreate)
         */
            btn_drive.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                chooseAccount();
            }
            });
    }

    public void chooseAccount() {
        Intent intent = AccountPicker.newChooseAccountIntent(null, null, new String[]{"com.google"}, false, null, null, null, null);
        startActivityForResult(intent, CHOOSE_ACCOUNT);
    }

    // Fetch the access token asynchronously.
    void getAndUseAuthTokenInAsyncTask(Account account) {
        AsyncTask<Account, String, String> task = new AsyncTask<Account, String, String>() {
            ProgressDialog progressDlg;
            AsyncTask<Account, String, String> me = this;

            @Override
            protected void onPreExecute() {
                progressDlg = new ProgressDialog(ctx, ProgressDialog.STYLE_SPINNER);
                progressDlg.setMax(100);
                progressDlg.setTitle("Validating...");
                progressDlg.setMessage("Verifying the login data you entered...\n\nThis action will time out after 10 seconds.");
                progressDlg.setCancelable(false);
                progressDlg.setIndeterminate(false);
                progressDlg.setOnCancelListener(new android.content.DialogInterface.OnCancelListener() {
                    public void onCancel(DialogInterface d) {
                        progressDlg.dismiss();
                        me.cancel(true);
                    }
                });
                progressDlg.show();
            }

            @Override
            protected String doInBackground(Account... params) {
                return getAccessToken(params[0]);
            }

            @Override
            protected void onPostExecute(String s) {
                if (s == null) {
                    // Wait for the extra intent
                } else {
                    MyApp.accountName = s;
                    getDriveFiles();
                }
                progressDlg.dismiss();
            }
        };
        task.execute(account);
    }

    /**
     * Fetches the token from a particular Google account chosen by the user.  DO NOT RUN THIS DIRECTLY.  It must be run asynchronously inside an AsyncTask.
     * @param activity
     * @param account
     * @return
     */
    private String getAccessToken(Account account) {
        try {
            return GoogleAuthUtil.getToken(ctx, account.name, "oauth2:" + DriveScopes.DRIVE_READONLY);  // IMPORTANT: DriveScopes must be changed depending on what level of access you want
        } catch (UserRecoverableAuthException e) {
            // Start the Approval Screen intent, if not run from an Activity, add the Intent.FLAG_ACTIVITY_NEW_TASK flag.
            a.startActivityForResult(e.getIntent(), REQUEST_TOKEN);
            e.printStackTrace();
            return null;
        } catch (GoogleAuthException e) {
            e.printStackTrace();
            return null;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

    private Drive getDriveService() {
        HttpTransport ht = AndroidHttp.newCompatibleTransport();             // Makes a transport compatible with both Android 2.2- and 2.3+
        HymansonFactory jf = new HymansonFactory();                            // You need a JSON parser to help you out with the API response
        Credential credential = new Credential(BearerToken.authorizationHeaderAccessMethod()).setAccessToken(MyApp.accountName);
        HttpRequestFactory rf = ht.createRequestFactory(credential);
        Drive.Builder b = new Drive.Builder(ht, jf, null);
        b.setJsonHttpRequestInitializer(new JsonHttpRequestInitializer() {

            @Override
            public void initialize(JsonHttpRequest request) throws IOException {
                DriveRequest driveRequest = (DriveRequest) request;
                driveRequest.setPrettyPrint(true);
                driveRequest.setOauthToken(MyApp.accountName);
            }
        });
        return b.build();
    }

    /**
     * Obtains a list of all files on the signed-in user's Google Drive account.
     */
    private void getDriveFiles() {
        Drive service = getDriveService();
        Log.d("SiteTrack", "FUNCTION getDriveFiles()");
        Files.List request;
        try {
            request = service.files().list(); // .setQ("mimeType=\"text/plain\"");
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }
        do {
            FileList files;
            try {
                Log.d("SiteTrack", request.toString());
                files = request.execute();
            } catch (IOException e) {
                e.printStackTrace();
                Log.d("SiteTrack", "Exception");
                return;
            }
            List<File> fileList = files.getItems();
            Log.d("SiteTrack", "Files found: " + files.getItems().size());
            for (File f : fileList) {
                String fileId = f.getId();
                String title = f.getTitle();
                Log.d("SiteTrack", "File " + fileId + ": " + title);
            }
            request.setPageToken(files.getNextPageToken());
        } while (request.getPageToken() != null && request.getPageToken().length() >= 0);
    }

    protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
        if (requestCode == CHOOSE_ACCOUNT && resultCode == RESULT_OK) {
            MyApp.accountName = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
            GoogleAccountManager gam = new GoogleAccountManager(this);
            getAndUseAuthTokenInAsyncTask(gam.getAccountByName(MyApp.accountName));
            Log.d("SiteTrack", "CHOOSE_ACCOUNT");
        } else if (requestCode == REQUEST_TOKEN && resultCode == RESULT_OK) {
            MyApp.accountName = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
            Log.d("SiteTrack", "REQUEST_TOKEN");
        }
    }   
}

However, I am getting "cannot be resolved" errors on all the com.google imports. I have Google APIs 16 and have set it as my project build target. Anyone know what the problem is?

但是，我在所有 com.google 导入中遇到“无法解决”错误。我有 Google API 16 并将其设置为我的项目构建目标。有谁知道问题是什么？

回答by acj

To take care of the Drive-related imports, you'll need a few jars from the Google Drive SDK. There are a few large ones, so you may want to add them individually to suit your app.

要处理与 Drive 相关的导入，您需要来自Google Drive SDK的一些 jar 。有几个大的，因此您可能需要单独添加它们以适合您的应用程序。

If that doesn't resolve the com.google.android.gms.*imports, the Google Play Services add-on needs to be installed (from Extras -> Google Play Services in the SDK Manager) and google-play-services.jarneeds to be added to your build path.

如果这不能解决com.google.android.gms.*导入问题，则需要安装 Google Play 服务插件（从 SDK 管理器中的 Extras -> Google Play 服务）并且google-play-services.jar需要添加到您的构建路径中。

EDIT:

编辑：

In this case, the following jars were needed:

在这种情况下，需要以下 jars：

1. google-api-services-drive-v2-rev1-1.7.2-beta.jar
2. google-http-client-1.10.3-beta.jar
3. google-http-client-android2-1.10.3-beta.jar
4. google-oauth-client-1.10.1-beta.jar
5. google-api-client-android2-1.10.3-beta.jar
6. google-api-client-1.10.3-beta.jar

1. google-api-services-drive-v2-rev1-1.7.2-beta.jar
2. google-http-client-1.10.3-beta.jar
3. google-http-client-android2-1.10.3-beta.jar
4. google-oauth-client-1.10.1-beta.jar
5. google-api-client-android2-1.10.3-beta.jar
6. google-api-client-1.10.3-beta.jar

If you're using the Google Plugin for Eclipse, the steps for creating a Drive-enabled project are outlined here.

如果您使用的是 Google Plugin for Eclipse，此处概述了创建支持 Drive 的项目的步骤。