Java DriveContents.discard方法代码示例

import com.google.android.gms.drive.DriveContents; //导入方法依赖的package包/类
public String getContentsFromDrive(DriveId id) throws IOException {
    DriveFile theFile = Drive.DriveApi.getFile(mGoogleApiClient, id);
    DriveApi.DriveContentsResult result =
            theFile.open(mGoogleApiClient, DriveFile.MODE_READ_ONLY, null).await();
    DriveContents driveContents = result.getDriveContents();
    try {
        if (driveContents != null) {
            return IOUtils.readAsString(driveContents.getInputStream());
        }
    } finally {
        if (driveContents != null) {
            driveContents.discard(mGoogleApiClient);
        }
    }
    return null;
}
 

import com.google.android.gms.drive.DriveContents; //导入方法依赖的package包/类
@Override
protected String doInBackgroundConnected(DriveId... params) {
    String contents = null;
    DriveFile file = params[0].asDriveFile();
    DriveApi.DriveContentsResult driveContentsResult =
            file.open(getGoogleApiClient(), DriveFile.MODE_READ_ONLY, null).await();
    if (!driveContentsResult.getStatus().isSuccess()) {
        return null;
    }
    DriveContents driveContents = driveContentsResult.getDriveContents();
    BufferedReader reader = new BufferedReader(
            new InputStreamReader(driveContents.getInputStream()));
    StringBuilder builder = new StringBuilder();
    String line;
    try {
        while ((line = reader.readLine()) != null) {
            builder.append(line);
        }
        contents = builder.toString();
    } catch (IOException e) {
        Log.e(TAG, "IOException while reading from the stream", e);
    }

    driveContents.discard(getGoogleApiClient());
    return contents;
}
 

import com.google.android.gms.drive.DriveContents; //导入方法依赖的package包/类
@Override
protected String doInBackgroundConnected(DriveId... params) {
    String contents = null;
    DriveFile file = Drive.DriveApi.getFile(getGoogleApiClient(), params[0]);
    DriveContentsResult driveContentsResult =
            file.open(getGoogleApiClient(), DriveFile.MODE_READ_ONLY, null).await();
    if (!driveContentsResult.getStatus().isSuccess()) {
        return null;
    }
    DriveContents driveContents = driveContentsResult.getDriveContents();
    BufferedReader reader = new BufferedReader(
            new InputStreamReader(driveContents.getInputStream()));
    StringBuilder builder = new StringBuilder();
    String line;
    try {
        while ((line = reader.readLine()) != null) {
            builder.append(line);
        }
        contents = builder.toString();
    } catch (IOException e) {

    }

    driveContents.discard(getGoogleApiClient());
    return contents;
}
 

import com.google.android.gms.drive.DriveContents; //导入方法依赖的package包/类
/**
 * Returns the string representation of the coupons json that was stored
 * in {@link DriveFile} passed to this method.
 */
private String getCouponsJson(DriveFile driveFile) {
    DebugLog.logMethod();
    // Open file in read mode
    DriveApi.DriveContentsResult driveContentsResult = driveFile
            .open(getGoogleApiClient(), DriveFile.MODE_READ_ONLY, null)
            .await();

    DebugLog.logMessage("Status code: " + driveContentsResult.getStatus().getStatusCode()
            + "\nStatus message: " + driveContentsResult.getStatus().getStatusMessage());

    if (!driveContentsResult.getStatus().isSuccess()) {
        DebugLog.logMessage("DriveContentsResult failure");
        return null;
    }

    // Read the contents of the file line by line and generate the json.
    DriveContents driveContents = driveContentsResult.getDriveContents();
    BufferedReader reader = new BufferedReader(new InputStreamReader(driveContents.getInputStream()));
    StringBuilder builder = new StringBuilder();
    String line;
    try {
        while ((line = reader.readLine()) != null) {
            builder.append(line);
        }
    } catch (IOException e) {
        e.printStackTrace();
        DebugLog.logMessage(e.getMessage());
    }
    driveContents.discard(getGoogleApiClient());
    DebugLog.logMessage("Coupons json: " + builder.toString());
    return builder.toString();
}
 

import com.google.android.gms.drive.DriveContents; //导入方法依赖的package包/类
@Override
protected String doInBackgroundConnected(DriveId... params) {
    String state = null;
    DriveFile file = params[0].asDriveFile();
    DriveApi.DriveContentsResult driveContentsResult =
            file.open(getGoogleApiClient(), DriveFile.MODE_READ_ONLY, null).await();
    if (!driveContentsResult.getStatus().isSuccess()) {
        return null;
    }
    DriveContents driveContents = driveContentsResult.getDriveContents();
    BufferedReader reader = new BufferedReader(
            new InputStreamReader(driveContents.getInputStream()));
    StringBuilder builder = new StringBuilder();
    String line;
    try {
        while ((line = reader.readLine()) != null) {
            builder.append(line);
            builder.append("\n");
        }
        state = builder.toString();
        reader.close();
    } catch (IOException e) {
        Log.e(TAG, "IOException while reading from the stream", e);
    }
    driveContents.discard(getGoogleApiClient());
    String validState=UIUtils.stripMagicSequence(state);
    return validState;
}
 

import com.google.android.gms.drive.DriveContents; //导入方法依赖的package包/类
@Override
protected boolean handleIntent() {
    DebugLog.logMethod();
    try {
        /*
        First retrieve the json representation of all coupons in
        the app. If this data is null, return false.
         */
        String couponsJson = getCouponsJson();
        if (couponsJson == null) {
            showError("No coupon data");
            return false;
        }

        // Get the drive app specific drive file to write data into.
        DriveFile driveFile = getDriveFile();
        boolean isNewFile = driveFile == null;
        // Get the driveContents to write data to.
        DriveContents driveContents = driveFile == null
                ? createDriveFileContents()
                : openDriveContentsFileInEditMode(driveFile);
        if (driveContents == null) {
            showError("Failed to create drive file");
            return false;
        }

        // Write the couponsJson to the app specific file in google drive
        if (!writeToDriveFile(driveContents, couponsJson, isNewFile)) {
            driveContents.discard(getGoogleApiClient());
            showError("Error occurred while exporting to Google drive");
            return false;
        }
        return true;

    } catch (Exception e) {
        e.printStackTrace();
        DebugLog.logMessage(e.getMessage());
        showError("Error: " + e.getMessage());
        return false;
    }
}
 

import com.google.android.gms.drive.DriveContents; //导入方法依赖的package包/类
@Override
public int uploadFile(File tempFile) {
    DriveFile driveFile;
    MetadataResult metadataResult;
    Metadata metadata;
    DriveContents driveContents = null;
    DriveContentsResult driveContentsResult;
    OutputStream outputStream;
    ExecutionOptions executionOptions;
    int complentionStatus;

    Log.i(TAG, "start upload of DB file temp:" + tempFile.getName());

    try {
        driveFile = mDriveId.asDriveFile();

        // Get metadata
        metadataResult = driveFile.getMetadata(mGoogleApiClient).await();
        checkStatus(metadataResult);

        metadata = metadataResult.getMetadata();

        Log.i(TAG, "try to upload of DB file:" + metadata.getOriginalFilename());

        if (!metadata.isPinned()) {
            pinFile(driveFile);
        }

        // Writing file
        driveContentsResult = mDriveContent.reopenForWrite(mGoogleApiClient).await();
        checkStatus(driveContentsResult);

        driveContents = driveContentsResult.getDriveContents();

        outputStream  = driveContents.getOutputStream();

        // Copio il file
        FileUtils.copyFile(tempFile, outputStream);
        Log.i(TAG, "try to commit file copy done");

        // Commit del file
        executionOptions = new ExecutionOptions.Builder()
                .setNotifyOnCompletion(true)
                .setConflictStrategy(ExecutionOptions.CONFLICT_STRATEGY_KEEP_REMOTE)
                .build();

        driveContents.commit(mGoogleApiClient, null, executionOptions);

        Log.i(TAG, "file committed - wait for complention");

        // Wait for complention
        complentionStatus = mGDriveCompletionRecevier.waitCompletion();

        Log.i(TAG, "received complention status:" + complentionStatus);

        if (complentionStatus == CompletionEvent.STATUS_CONFLICT) {
            return UPLOAD_CONFLICT;
        } else if (complentionStatus == CompletionEvent.STATUS_FAILURE) {
            throw new SyncException(SyncStatus.Code.ERROR_UPLOAD_CLOUD, "Error writing file to GDrive (FAILURE of commit)");
        }

        return UPLOAD_OK;
    } catch (IOException e) {
        if (driveContents != null) {
            driveContents.discard(mGoogleApiClient);
        }
        throw new SyncException(SyncStatus.Code.ERROR_UPLOAD_CLOUD, "Error writing file to GDrive message:" + e.getMessage());
    }
}
 

import com.google.android.gms.drive.DriveContents; //导入方法依赖的package包/类
/**
 * Discards the changes to the file contents and close.
 * 
 * @param driveContent	the file content changes to discard
 */
public void discardChangesAndClose(DriveContents driveContent) {
	driveContent.discard(getGoogleApiClient());		
}