有人可以提供有关Google Drive REST API v3的最新Android指南吗?

时间:2019-07-09 09:50:23

标签: android rest android-studio google-drive-android-api

我自己和其他许多人都在努力设置Google Drive REST API v3以与Android应用程序一起使用。这主要是由于以下事实:Google官方文档缺少适用于Android的正确的快速入门指南,而我们只剩下一些零碎的(过时和/或令人困惑的)信息,但我们需要的是 complete < / strong>针对初学者的最新指南,以帮助我们入门和运行,以便他们可以在自己的云端硬盘上打开和编辑文件,包括如何设置凭据,依赖项和清单。

因此,我要问的是,是否有人愿意创建这样的指南,或者可以指向已经制定的与a)与最新版Google Drive API REST v3有关的详细指南,{{3} }和b)涵盖了以上所有方面,这些都需要初学者开始?

ArtOfWarfare here发布的指南绝对是 perfect ,完全符合我的要求-但不幸的是过时了几年。任何人都可以提供本指南的最新版本吗?谢谢。

5 个答案:

答案 0 :(得分:2)

在回答这个问题之前,我想让您知道我从这里获得了代码(https://ammar.lanui.online/integrate-google-drive-rest-api-on-android-app-bc4ddbd90820),而Google的文档对我没有太大帮助。因此,此解决方案来自我可用的有限资源。

我需要驱动器才能从我的应用程序上载和下载文件。在驱动器中,我必须创建一个文件夹,并且必须将文件从我的应用程序上传到该文件夹​​,然后将文件从该文件夹下载到我的设备。这段代码对我来说很好用。

我相信您必须已完成Google登录。如果您不喜欢,请签出此视频(https://youtu.be/t-yZUqthDMM)。

要与Drive API进行交互,您需要为您的应用启用Drive API服务。您可以在Google Developer Console中进行此操作。

要启用Drive API,请完成以下步骤:

转到Google API控制台。

  1. 选择一个项目。

  2. 在左侧的边栏中,展开API和身份验证,然后选择API。

  3. 在显示的可用API列表中,单击Drive API链接,然后单击Enable API。

完成后,进入控制台的OAuth同意屏幕,添加两个驱动器范围并保存。

在您的项目中添加以下依赖项。

implementation 'com.google.android.gms:play-services-auth:17.0.0'// for google sign in

// for drive integration
implementation 'com.google.android.gms:play-services-auth:16.0.1'
implementation 'com.google.http-client:google-http-client-gson:1.26.0'
implementation('com.google.api-client:google-api-client-android:1.26.0') {
exclude group: 'org.apache.httpcomponents'
}
implementation('com.google.apis:google-api-services-drive:v3-rev136-1.25.0') 
{
exclude group: 'org.apache.httpcomponents'
} 

在android标签中的同一gradle文件中,添加打包选项。

packagingOptions {
exclude 'META-INF/DEPENDENCIES'
exclude 'META-INF/LICENSE'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/license.txt'
exclude 'META-INF/NOTICE'
exclude 'META-INF/NOTICE.txt'
exclude 'META-INF/notice.txt'
exclude 'META-INF/ASL2.0'
}

在清单文件中,添加所需的权限

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

在这里,我将下载的文件存储在外部存储中。这就是为什么我添加了对外部存储设备READ和WRITE的权限

Google登录后,请获得访问Google云端硬盘的权限。其代码如下。

private void checkForGooglePermissions() {

    if (!GoogleSignIn.hasPermissions(
            GoogleSignIn.getLastSignedInAccount(getApplicationContext()),
            ACCESS_DRIVE_SCOPE,
            SCOPE_EMAIL)) {
        GoogleSignIn.requestPermissions(
                MainActivity.this,
                RC_AUTHORIZE_DRIVE,
                GoogleSignIn.getLastSignedInAccount(getApplicationContext()),
                ACCESS_DRIVE_SCOPE,
                SCOPE_EMAIL);
    } else {
        Toast.makeText(this, "Permission to access Drive and Email has been granted", Toast.LENGTH_SHORT).show();
        driveSetUp();

    }

}

变量ACCESS_DRIVE_SCOPE和SCOPE_EMAIL是

Scope ACCESS_DRIVE_SCOPE = new Scope(Scopes.DRIVE_FILE);
Scope SCOPE_EMAIL = new Scope(Scopes.EMAIL);

获得许可并登录后,我们就有了GoogleSignInAccount对象。使用该对象,创建一个GoogleAccountCredential对象,我们可以从中生成Drive对象。云端硬盘对象是我们在Google云端硬盘之间进行通信所需的对象。

private void driveSetUp() {

GoogleSignInAccount mAccount = GoogleSignIn.getLastSignedInAccount(MainActivity.this);

GoogleAccountCredential credential =
        GoogleAccountCredential.usingOAuth2(
                getApplicationContext(), Collections.singleton(Scopes.DRIVE_FILE));
credential.setSelectedAccount(mAccount.getAccount());
googleDriveService =
        new com.google.api.services.drive.Drive.Builder(
                AndroidHttp.newCompatibleTransport(),
                new GsonFactory(),
                credential)
                .setApplicationName("GoogleDriveIntegration 3")
                .build();
mDriveServiceHelper = new DriveServiceHelper(googleDriveService);
}

在这里您可以看到我创建了DriveServiceHelper类的对象,并随同传递了Drive(googleDriveSrvice)的对象。 DriveServiceHelper类在下面给出。我是从这里得到的。(https://github.com/gsuitedevs/android-samples/blob/master/drive/deprecation/app/src/main/java/com/google/android/gms/drive/sample/driveapimigration/DriveServiceHelper.java?source=post_page-----bc4ddbd90820----------------------)。您可以使用那个。我为自己上了那堂课。

public class DriveServiceHelper {

private final Executor mExecutor = Executors.newSingleThreadExecutor();
private final Drive mDriveService;
private final String TAG = "DRIVE_TAG";


public DriveServiceHelper(Drive driveService) {

    mDriveService = driveService;
}

/**
 * Creates a text file in the user's My Drive folder and returns its file ID.
 */
public Task<GoogleDriveFileHolder> createFile(String folderId, String filename) {
    return Tasks.call(mExecutor, () -> {
        GoogleDriveFileHolder googleDriveFileHolder = new GoogleDriveFileHolder();

        List<String> root;
        if (folderId == null) {

            root = Collections.singletonList("root");

        } else {

            root = Collections.singletonList(folderId);
        }
        File metadata = new File()
                .setParents(root)
                .setMimeType("text/plain")
                .setName(filename);

        File googleFile = mDriveService.files().create(metadata).execute();
        if (googleFile == null) {

            throw new IOException("Null result when requesting file creation.");
        }
        googleDriveFileHolder.setId(googleFile.getId());
        return googleDriveFileHolder;
    });
}


// TO CREATE A FOLDER

public Task<GoogleDriveFileHolder> createFolder(String folderName, @Nullable String folderId) {
    return Tasks.call(mExecutor, () -> {

        GoogleDriveFileHolder googleDriveFileHolder = new GoogleDriveFileHolder();

        List<String> root;
        if (folderId == null) {

            root = Collections.singletonList("root");

        } else {

            root = Collections.singletonList(folderId);
        }
        File metadata = new File()
                .setParents(root)
                .setMimeType("application/vnd.google-apps.folder")
                .setName(folderName);

        File googleFile = mDriveService.files().create(metadata).execute();
        if (googleFile == null) {
            throw new IOException("Null result when requesting file creation.");
        }
        googleDriveFileHolder.setId(googleFile.getId());
        return googleDriveFileHolder;
    });
}


public Task<Void> downloadFile(java.io.File targetFile, String fileId) {
    return Tasks.call(mExecutor, () -> {

        // Retrieve the metadata as a File object.
        OutputStream outputStream = new FileOutputStream(targetFile);
        mDriveService.files().get(fileId).executeMediaAndDownloadTo(outputStream);
        return null;
    });
}

public Task<Void> deleteFolderFile(String fileId) {

    return Tasks.call(mExecutor, () -> {

        // Retrieve the metadata as a File object.
        if (fileId != null) {
            mDriveService.files().delete(fileId).execute();
        }

        return null;

    });
}

// TO LIST FILES

public List<File> listDriveImageFiles() throws IOException{

    FileList result;
    String pageToken = null;
    do {
        result = mDriveService.files().list()
/*.setQ("mimeType='image/png' or mimeType='text/plain'")This si to list both image and text files. Mind the type of image(png or jpeg).setQ("mimeType='image/png' or mimeType='text/plain'") */
                .setSpaces("drive")
                .setFields("nextPageToken, files(id, name)")
                .setPageToken(pageToken)
                .execute();

        pageToken = result.getNextPageToken();
    } while (pageToken != null);

    return result.getFiles();
}

// TO UPLOAD A FILE ONTO DRIVE

public Task<GoogleDriveFileHolder> uploadFile(final java.io.File localFile, 
final String mimeType, @Nullable final String folderId) {
    return Tasks.call(mExecutor, new Callable<GoogleDriveFileHolder>() {
        @Override
        public GoogleDriveFileHolder call() throws Exception {
            // Retrieve the metadata as a File object.

            List<String> root;
            if (folderId == null) {
                root = Collections.singletonList("root");
            } else {

                root = Collections.singletonList(folderId);
            }

            File metadata = new File()
                    .setParents(root)
                    .setMimeType(mimeType)
                    .setName(localFile.getName());

            FileContent fileContent = new FileContent(mimeType, localFile);

            File fileMeta = mDriveService.files().create(metadata, 
fileContent).execute();
            GoogleDriveFileHolder googleDriveFileHolder = new 
GoogleDriveFileHolder();
            googleDriveFileHolder.setId(fileMeta.getId());
            googleDriveFileHolder.setName(fileMeta.getName());
            return googleDriveFileHolder;
        }
    });
}
}

请记住以下事实:无论何时创建文件或文件夹,或者上传文件,驱动器都会为其提供唯一的ID,并且您可以访问它。因此,这里不是唯一的文件名,而是文件的ID。因此,如果您多次上传或创建相同名称的文件,它将多次保存在文件夹中。因此,如果要用另一个同名文件替换文件。首先删除文件并保存/上传。 要创建文件,请指定要创建的文件夹ID和文件名。

下面给出了GoogleDriveHolder类。

public class GoogleDriveFileHolder {

private String id;
private String name;
private DateTime modifiedTime;
private long size;
private DateTime createdTime;
private Boolean starred;


public DateTime getCreatedTime() {
    return createdTime;
}

public void setCreatedTime(DateTime createdTime) {
    this.createdTime = createdTime;
}

public Boolean getStarred() {
    return starred;
}

public void setStarred(Boolean starred) {
    this.starred = starred;
}

public String getId() {
    return id;
}

public void setId(String id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public DateTime getModifiedTime() {
    return modifiedTime;
}

public void setModifiedTime(DateTime modifiedTime) {
    this.modifiedTime = modifiedTime;
}

public long getSize() {
    return size;
}

public void setSize(long size) {
    this.size = size;
}
}

必须从您的活动中调用这些方法。就像下面给出的代码一样。

创建文件夹

public void createFolderInDrive(View view) {

Log.i(TAG, "Creating a Folder...");
mDriveServiceHelper.createFolder("My Foder", null)
        .addOnSuccessListener(new OnSuccessListener<GoogleDriveFileHolder>() {
            @Override
            public void onSuccess(GoogleDriveFileHolder googleDriveFileHolder) {

                Gson gson = new Gson();
                Log.i(TAG, "onSuccess of Folder creation: " + gson.toJson(googleDriveFileHolder));
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {

                Log.i(TAG, "onFailure of Folder creation: " + e.getMessage());
            }
        });
}

列出文件

public void listFilesInDrive(View view) {

Log.i(TAG, "Listing Files...");
new MyAsyncTask().execute();

}

要列出文件,您不能在主线程中进行操作,因为这会导致死锁。您必须在Asynctask的doInBackground()方法中执行此操作。这是我的课。

public class MyAsyncTask extends AsyncTask<Void, Void, List<File>> {

List<File> fileList;

@Override
protected List<File> doInBackground(Void... voids) {

    try {

        fileList = mDriveServiceHelper.listDriveImageFiles();

    } catch (IOException e) {

        Log.i(TAG, "IO Exception while fetching file list");
    }

    return fileList;

}

@Override
protected void onPostExecute(List<File> files) {
    super.onPostExecute(files);

    if (files.size() == 0){

        Log.i(TAG, "No Files");
    }
    for (File file : files) {

        Log.i(TAG, "\nFound file: File Name :" +
                file.getName() + " File Id :" + file.getId());
    }
}
}

上传文件

要将文件上传到Drive文件夹,请指定文件夹ID,要上传的文件的mime类型以及文件本身。 在这里,我从图库中选择一个图像并将其上传到驱动器中。

public void uploadFile(View view) {

if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_PICK_IMAGE);

} else {
    Intent i = new Intent(
            Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

    startActivityForResult(i, RESULT_LOAD_IMAGE);
}
}

在onActivityResult中

else if (requestCode == RESULT_LOAD_IMAGE) {

if (resultCode == RESULT_OK) {

    Uri selectedImage = data.getData();
    String[] filePathColumn = {MediaStore.Images.Media.DATA};

    Cursor cursor = getContentResolver().query(selectedImage,
            filePathColumn, null, null, null);
    cursor.moveToFirst();

    int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
    String picturePath = cursor.getString(columnIndex);
    cursor.close();

    uploadImageIntoDrive(BitmapFactory.decodeFile(picturePath));

} else {

    Toast.makeText(this, "Did not select any image", Toast.LENGTH_SHORT).show();
}

uploadImageIntoDrive()方法,

private void uploadImageIntoDrive(Bitmap bitmap) {

try {

    if (bitmap == null) {

        Log.i(TAG, "Bitmap is null");
        return;
    }
    java.io.File file = new java.io.File(getApplicationContext().getFilesDir(), "FirstFile");
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.PNG, 0 /*ignored for PNG*/, bos);
    byte[] bitmapdata = bos.toByteArray();

    //write the bytes in file
    FileOutputStream fos = new FileOutputStream(file);
    fos.write(bitmapdata);
    fos.flush();
    fos.close();

    mDriveServiceHelper.uploadFile(file, "image/jpeg", "MY_FOLDER_ID")
            .addOnSuccessListener(new OnSuccessListener<GoogleDriveFileHolder>() {
                @Override
                public void onSuccess(GoogleDriveFileHolder googleDriveFileHolder) {

                    Log.i(TAG, "Successfully Uploaded. File Id :" + googleDriveFileHolder.getId());
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {

                    Log.i(TAG, "Failed to Upload. File Id :" + e.getMessage());
                }
            });
} catch (Exception e) {

    Log.i(TAG, "Exception : " + e.getMessage());
}

}

要下载文件

要下载文件,请指定文件ID和下载文件必须存储到的目标文件。

public void downloadFile(View view) {

java.io.File file = new java.io.File(getExternalFilesDir(null), "DemoFile2.jpg");
mDriveServiceHelper.downloadFile(file, "MY_FILE_ID")
        .addOnSuccessListener(new OnSuccessListener<Void>() {
            @Override
            public void onSuccess(Void aVoid) {

                Log.i(TAG, "Downloaded the file");
                long file_size = file.length() / 1024;
                Log.i(TAG, "file Size :" + file_size);
                Log.i(TAG, "file Path :" + file.getAbsolutePath());
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {

                Log.i(TAG, "Failed to Download the file, Exception :" + e.getMessage());
            }
        });
}

要删除文件。

public void deleteFile(View view) {

mDriveServiceHelper.deleteFolderFile("MY_FILE_OR_FOLDER_ID")
        .addOnSuccessListener(new OnSuccessListener<Void>() {
            @Override
            public void onSuccess(Void aVoid) {

                Log.i(TAG, "onSuccess of Deleting File ");
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {

                Log.i(TAG, "onFailure on Deleting File Exception : " + e.getMessage());
            }
        });
}

我不是一个有经验的人。我发布此代码的原因是有人会发现它有用,并且可以提出自己的更改并将其发布在此处。因为目前没有太多关于Android的Drive Rest API集成的参考。

谢谢。

答案 1 :(得分:0)

我也需要。我设法从这些链接中构建出了虽然不是最佳的东西,但效果仍然不错:

Google guides for REST API v3

Google Github demo project for migration to REST after deprecation of the other method

Documentation for REST API v3

我现在剩下的主要问题是找到文件/文件夹选择器。演示项目中的一个使用SAF,其中does not allow to retrieve the ID of the file you picked(噢!)

答案 2 :(得分:0)

我在尝试弄清楚如何使用Drive REST API时所提到的文章是on this page

我刚接触Android,但是这是我获取文件ID列表的方法。希望这对您有帮助

创建一个返回文件列表的方法(不要将它们与java.io.Files混合使用)。 它们是com.google.api.services.drive.model.File;的实例 下面的方法是github上的弃用教程中DriveServiceHelper类的一部分。检查源文件以查看如何创建mExecutor和mDriveService实例

public Task<FileList> queryFiles() {
    return Tasks.call(mExecutor, () ->
            mDriveService.files().list().setSpaces("drive").execute());
}

然后您可以遍历列表并获取每个文件的ID

for (File file : fileList.getFiles()) {
   file.getId()
}

获得ID后,您可以删除或更新文件 这是一个删除方法的示例,该方法可在您每次上传到Google驱动器时删除您的应用会创建的重复文件:

private void mQuery(String name) {
    if (mDriveServiceHelper != null) {
        Log.d(TAG, "Querying for files.");

        mDriveServiceHelper.queryFiles()
                .addOnSuccessListener(fileList -> {
                    for (File file : fileList.getFiles()) {
                        if(file.getName().equals(name))
                            mDriveServiceHelper.deleteFolderFile(file.getId()).addOnSuccessListener(v-> Log.d(TAG, "removed file "+file.getName())).
                                    addOnFailureListener(v-> Log.d(TAG, "File was not removed: "+file.getName()));
                    }
                })
                .addOnFailureListener(exception -> Log.e(TAG, "Unable to query files.", exception));
    }
}

这是DriveServiceHelper类中的deleteFolderFile方法

public Task<Void> deleteFolderFile(String fileId) {
    return Tasks.call(mExecutor, () -> {
        // Retrieve the metadata as a File object.
        if (fileId != null) {
            mDriveService.files().delete(fileId).execute();
        }
        return null;
    });
}

NB!如果您需要对大量文件执行查询,这不是最佳方法。这只是一个草案,可以帮助您获得想法。通过使用二进制搜索算法在列表中查找特定文件,至少可以改善mQuery func。

答案 3 :(得分:0)

我创建了一个项目,其中使用“Android Google DRIVE API V3”在其中创建文件夹、上传文件、删除文件和下载文件功能。 带有代码的完整 android 应用程序位于 https://github.com/prateekbangre/GoogleDrive_demo

文件夹是否存在:

public Task<String> isFolderPresent() {
    return Tasks.call(mExecutor, () -> {
        FileList result = mDriveService.files().list().setQ("mimeType='application/vnd.google-apps.folder' and trashed=false").execute();
        for (File file : result.getFiles()) {
            if (file.getName().equals(FOLDER_NAME))
                return file.getId();
        }
        return "";
    });
}

创建文件夹:

public Task<String> createFolder() {
    return Tasks.call(mExecutor, () -> {
        File metadata = new File()
                .setParents(Collections.singletonList("root"))
                .setMimeType(FOLDER_MIME_TYPE)
                .setName(FOLDER_NAME);

        File googleFolder = mDriveService.files().create(metadata).execute();
        if (googleFolder == null) {
            throw new IOException("Null result when requesting Folder creation.");
        }

        return googleFolder.getId();
    });
}

获取文件列表:

public Task<ArrayList<GoogleDriveFileHolder>> getFolderFileList() {

    ArrayList<GoogleDriveFileHolder> fileList = new ArrayList<>();

    if (folderId.isEmpty()){
        Log.e(TAG, "getFolderFileList: folder id not present" );
        isFolderPresent().addOnSuccessListener(id -> folderId=id)
                .addOnFailureListener(exception -> Log.e(TAG, "Couldn't create file.", exception));
    }

    return Tasks.call(mExecutor, () -> {
        FileList result = mDriveService.files().list()
                .setQ("mimeType = '" + SHEET_MIME_TYPE + "' and trashed=false and parents = '" + folderId + "' ")
                .setSpaces("drive")
                .execute();

        for (int i = 0; i < result.getFiles().size(); i++) {
            GoogleDriveFileHolder googleDriveFileHolder = new GoogleDriveFileHolder();
            googleDriveFileHolder.setId(result.getFiles().get(i).getId());
            googleDriveFileHolder.setName(result.getFiles().get(i).getName());

            fileList.add(googleDriveFileHolder);
        }
        Log.e(TAG, "getFolderFileList: folderFiles: "+fileList );
        return fileList;
    });
}

上传文件到谷歌驱动器:

public Task<Boolean> uploadFileToGoogleDrive(String path) {

    if (folderId.isEmpty()){
        Log.e(TAG, "uploadFileToGoogleDrive: folder id not present" );
        isFolderPresent().addOnSuccessListener(id -> folderId=id)
                .addOnFailureListener(exception -> Log.e(TAG, "Couldn't create file.", exception));
    }

    return Tasks.call(mExecutor, () -> {

        Log.e(TAG, "uploadFileToGoogleDrive: path: "+path );
        java.io.File filePath = new java.io.File(path);

        File fileMetadata = new File();
        fileMetadata.setName(filePath.getName());
        fileMetadata.setParents(Collections.singletonList(folderId));
        fileMetadata.setMimeType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");

        FileContent mediaContent = new FileContent("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", filePath);
        File file = mDriveService.files().create(fileMetadata, mediaContent)
                .setFields("id")
                .execute();
        System.out.println("File ID: " + file.getId());

        return false;
    });
}

从谷歌驱动器下载文件:

public Task<Boolean> downloadFile(final java.io.File fileSaveLocation, final String fileId) {
    return Tasks.call(mExecutor, new Callable<Boolean>() {
        @Override
        public Boolean call() throws Exception {
            // Retrieve the metadata as a File object.
            OutputStream outputStream = new FileOutputStream(fileSaveLocation);
            mDriveService.files().get(fileId).executeMediaAndDownloadTo(outputStream);
            return true;
        }
    });
}

删除文件:

public Task<Boolean> deleteFolderFile(final String fileId) {
    return Tasks.call(mExecutor, new Callable<Boolean>() {
        @Override
        public Boolean call() throws Exception {
            // Retrieve the metadata as a File object.
            if (fileId != null) {
                mDriveService.files().delete(fileId).execute();
                return true;
            }
            return false;
        }
    });
}

以上是相同的代码示例。

答案 4 :(得分:0)

我想下载我创建的文件夹中的所有文件,我使用 mime 类型作为文本/纯文本,但我有视频、音频和所有类型的文件,如果我使用 "mimeType = '" + "/< /em>" 然后不显示文件。该怎么办 ?此处对所有文件使用什么 MIME 类型?

public static Task<ArrayList<GoogleDriveFileHolder>> getFolderFileList() {

        ArrayList<GoogleDriveFileHolder> fileList = new ArrayList<>();
        
        return Tasks.call(mExecutor, () -> {
            FileList result = mDriveService.files().list()
                    .setQ("mimeType = '" + "text/plain" +
                            "" + "' and trashed=false and parents = '" + "1lRlWrKKp4onqZe3-0anExm_yd1yWoPjR" + "' ")
                    .setSpaces("drive")
                    .execute();

            for (int i = 0; i < result.getFiles().size(); i++) {
                GoogleDriveFileHolder googleDriveFileHolder = new GoogleDriveFileHolder();
                googleDriveFileHolder.setId(result.getFiles().get(i).getId());
                googleDriveFileHolder.setName(result.getFiles().get(i).getName());

                fileList.add(googleDriveFileHolder);
            }
            Log.e("TAG", "getFolderFileList: folderFiles: "+fileList );
            return fileList;
        });
    }