使用Android将文本文件上传到Google云端硬盘

编辑：我已将文本设置为如下字符串：

String text =（“Hello！”）;

我想将其转换为纯文本文件，然后上传到Google云端硬盘文件夹。 我已经尝试过下面的代码，但它没有完整，所以我不能说出现了什么错误。

我正在使用谷歌硬盘“快速启动”演示，并尝试根据我的需要定制它。 链接： https ： //github.com/googledrive/android-quickstart

DriverClass：

public class UploadDrive extends Activity implements ConnectionCallbacks,OnConnectionFailedListener { private static final String TAG = "androiddrivequickstart"; private static final int REQUEST_CODE_CAPTURE_IMAGE = 1; private static final int REQUEST_CODE_CREATOR = 2; private static final int REQUEST_CODE_RESOLUTION = 3; private GoogleApiClient mGoogleApiClient; private Bitmap mBitmapToSave; private void saveFileToDrive() { // Start by creating a new contents, and setting a callback. Log.i(TAG, "Creating new contents."); //How to call? Can i use File from java.io? final Bitmap image = mBitmapToSave; Drive.DriveApi.newDriveContents(mGoogleApiClient).setResultCallback(new ResultCallback() { @Override public void onResult(DriveContentsResult result) { // If the operation was not successful, we cannot do anything // and must // fail. if (!result.getStatus().isSuccess()) { Log.i(TAG, "Failed to create new contents."); return; } // Otherwise, we can write our data to the new contents. Log.i(TAG, "New contents created."); // Get an output stream for the contents. OutputStream outputStream = result.getDriveContents().getOutputStream(); // Write the bitmap data from it. ByteArrayOutputStream textFile = new ByteArrayOutputStream(); //image.compress(Bitmap.CompressFormat.PNG, 100, textFile); try { outputStream.write(textFile.toByteArray()); } catch (IOException e1) { Log.i(TAG, "Unable to write file contents."); } // Create the initial metadata - MIME type and title. // Note that the user will be able to change the title later. MetadataChangeSet metadataChangeSet = new MetadataChangeSet.Builder() .setMimeType("text/plain").setTitle("Log: test.txt").build(); // Create an intent for the file chooser, and start it. IntentSender intentSender = Drive.DriveApi .newCreateFileActivityBuilder() .setInitialMetadata(metadataChangeSet) .setInitialDriveContents(result.getDriveContents()) .build(mGoogleApiClient); try { startIntentSenderForResult( intentSender, REQUEST_CODE_CREATOR, null, 0, 0, 0); } catch (SendIntentException e) { Log.i(TAG, "Failed to launch file chooser."); } } }); } @Override protected void onResume() { super.onResume(); if (mGoogleApiClient == null) { // Create the API client and bind it to an instance variable. // We use this instance as the callback for connection and connection // failures. // Since no account name is passed, the user is prompted to choose. mGoogleApiClient = new GoogleApiClient.Builder(this) .addApi(Drive.API) .addScope(Drive.SCOPE_FILE) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) .build(); } // Connect the client. Once connected, the camera is launched. mGoogleApiClient.connect(); } @Override protected void onPause() { if (mGoogleApiClient != null) { mGoogleApiClient.disconnect(); } super.onPause(); } @Override protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) { switch (requestCode) { case REQUEST_CODE_CAPTURE_IMAGE: // Called after a photo has been taken. if (resultCode == Activity.RESULT_OK) { // Store the image data as a bitmap for writing later. mBitmapToSave = (Bitmap) data.getExtras().get("data"); } break; case REQUEST_CODE_CREATOR: // Called after a file is saved to Drive. if (resultCode == RESULT_OK) { Log.i(TAG, "Image successfully saved."); mBitmapToSave = null; // Just start the camera again for another photo. startActivityForResult(new Intent(MediaStore.ACTION_IMAGE_CAPTURE),REQUEST_CODE_CAPTURE_IMAGE); } break; } } @Override public void onConnectionFailed(ConnectionResult result) { // Called whenever the API client fails to connect. Log.i(TAG, "GoogleApiClient connection failed: " + result.toString()); if (!result.hasResolution()) { // show the localized error dialog. GooglePlayServicesUtil.getErrorDialog(result.getErrorCode(), this, 0).show(); return; } // The failure has a resolution. Resolve it. // Called typically when the app is not yet authorized, and an // authorization // dialog is displayed to the user. try { result.startResolutionForResult(this, REQUEST_CODE_RESOLUTION); } catch (SendIntentException e) { Log.e(TAG, "Exception while starting resolution activity", e); } } @Override public void onConnected(Bundle connectionHint) { Log.i(TAG, "API client connected."); if (mBitmapToSave == null) { // This activity has no UI of its own. Just start the camera. startActivityForResult(new Intent(MediaStore.ACTION_IMAGE_CAPTURE), REQUEST_CODE_CAPTURE_IMAGE); return; } saveFileToDrive(); } @Override public void onConnectionSuspended(int cause) { Log.i(TAG, "GoogleApiClient connection suspended"); } } 

如何调用另一个名为MainActivity的类中的finalResultText，以便将其转换为纯文本文件以上传到Google Drive文件夹？

Answer 1

假设您提出的问题是：“如何将文本文件上传到Google云端硬盘？”，以下是快速概述：

1 /在开发人员控制台上授权您的应用，请参阅此内容 。 基本上，告诉Google您的SHA1 /’package-name’代表的应用需要访问Drive API（请勿在同意屏幕上忘记您的电子邮件地址）。 此授权适用于REST和GDAA API。

2 /决定是否要使用REST或GDAA API访问云端硬盘。 每个都有优点/缺点 （但这是一个很长的故事）。

3 /在这里查看REST / GDAA包装器演示 ，它在MainActivity类中有应用程序授权过程（参见onConnFail（）方法），以及各自类中REST和GDAA的基本CRUD方法。

祝好运

UPDATE
根据您在下面的评论，我假设您想强制QuickStart演示适合您。 请记住，GDAA（或REST）不关心内容是什么它只是一堆字节。 因此，当QuickStart将Bitmap转换为PNG并将输出流与其字节一起提供时，您必须使用一堆字节来完成。 我快速将下面的2个原语拼凑在一起，这将为DriveContents的输出流提供文件或字节数组（并且您可以将所有内容转换为文件或字节[]）。

  DriveContents file2Cont(DriveContents driveContents, java.io.File file) { OutputStream oos = driveContents.getOutputStream(); if (oos != null) try { InputStream is = new FileInputStream(file); byte[] buf = new byte[8192]; int c = 0; while ((c = is.read(buf, 0, buf.length)) > 0) { oos.write(buf, 0, c); oos.flush(); } } catch (Exception e) {/*handle errors*/} finally { try { oos.close(); } catch (Exception ignore) { } } return driveContents; } DriveContents bytes2Cont(DriveContents driveContents, byte[] buf) { OutputStream os = driveContents.getOutputStream(); try { os.write(buf); } catch (IOException e) {/*handle errors*/} finally { try { os.close(); } catch (Exception e) {/*handle errors*/} } return driveContents; }