Android 如何获取google drive rest api调用的访问令牌？

我想通过访问令牌从google drive获取文件列表

我所做的：

将应用程序注册到谷歌开发控制台

我有基于OAuth 2.0的客户端id

我想做的是：

调用

HttpCall

for

https://www.googleapis.com/drive/v2/files

我想在标头中设置访问令牌，如下所示：

DefaultHttpClient-httpClient=newdefaulthttpclient（）；
HttpPost=新的HttpPost（“https://www.googleapis.com/drive/v2/files");
post.addHeader（“内容类型”、“应用程序/json”）；
邮寄地址抬头（“授权”、“持票人XXXXXXXXXXXXXXXXXXXXXXXXX”）

如何使用

OAuth2.0

客户端Id获取授权访问令牌

您应该查看文档

这样整个工作就简单多了。比如说

创建一个文件： 列出文件夹中的文件 列出文件夹中的所有文件

/**
 * An activity that illustrates how to list files in a folder.
 */
public class ListFilesInFolderActivity extends BaseDemoActivity implements
        ResultCallback {

    private static DriveId sFolderId = DriveId.decodeFromString("DriveId:0B2EEtIjPUdX6MERsWlYxN3J6RU0");

    private ListView mResultsListView;
    private ResultsAdapter mResultsAdapter;

    @Override
    public void onConnected(Bundle connectionHint) {
        super.onCreate(connectionHint);
        setContentView(R.layout.activity_listfiles);
        mResultsListView = (ListView) findViewById(R.id.listViewResults);
        mResultsAdapter = new ResultsAdapter(this);
        mResultsListView.setAdapter(mResultsAdapter);
        DriveFolder folder = Drive.DriveApi.getFolder(getGoogleApiClient(), sFolderId);
        folder.listChildren(getGoogleApiClient()).setResultCallback(childrenRetrievedCallback);
    }

    ResultCallback<MetadataBufferResult> childrenRetrievedCallback = new
            ResultCallback<MetadataBufferResult>() {
        @Override
        public void onResult(MetadataBufferResult result) {
            if (!result.getStatus().isSuccess()) {
                showMessage("Problem while retrieving files");
                return;
            }
            mResultsAdapter.clear();
            mResultsAdapter.append(result.getMetadataBuffer());
            showMessage("Successfully listed files.");
        }
    }
}

---

有关查询的更多详细信息。

如果您正在使用中可用的作用域进行调用，那么这将是您的最佳选择

否则，您可以使用GoogleDrive Java客户端库。在这个例子中，您可以使用GoogleAccountCredential for Auth，它将包含访问令牌，但是您不需要直接使用它。请看一个例子

/**
 * An activity that illustrates how to list files in a folder.
 */
public class ListFilesInFolderActivity extends BaseDemoActivity implements
        ResultCallback {

    private static DriveId sFolderId = DriveId.decodeFromString("DriveId:0B2EEtIjPUdX6MERsWlYxN3J6RU0");

    private ListView mResultsListView;
    private ResultsAdapter mResultsAdapter;

    @Override
    public void onConnected(Bundle connectionHint) {
        super.onCreate(connectionHint);
        setContentView(R.layout.activity_listfiles);
        mResultsListView = (ListView) findViewById(R.id.listViewResults);
        mResultsAdapter = new ResultsAdapter(this);
        mResultsListView.setAdapter(mResultsAdapter);
        DriveFolder folder = Drive.DriveApi.getFolder(getGoogleApiClient(), sFolderId);
        folder.listChildren(getGoogleApiClient()).setResultCallback(childrenRetrievedCallback);
    }

    ResultCallback<MetadataBufferResult> childrenRetrievedCallback = new
            ResultCallback<MetadataBufferResult>() {
        @Override
        public void onResult(MetadataBufferResult result) {
            if (!result.getStatus().isSuccess()) {
                showMessage("Problem while retrieving files");
                return;
            }
            mResultsAdapter.clear();
            mResultsAdapter.append(result.getMetadataBuffer());
            showMessage("Successfully listed files.");
        }
    }
}

Query query = new Query.Builder()
    .addFilter(Filters.eq(SearchableField.TITLE, "HelloWorld.java"))
    .build();
Drive.DriveApi.query(googleApiClient, query);