gistfile1.txt

public static void writeFile(GcsFilename gcsFileName, String content, String contentType) {
        try {
            GcsFileOptions options = new GcsFileOptions.Builder().mimeType(contentType).contentEncoding("UTF-8").build();
            GcsService gcsService = GcsServiceFactory.createGcsService();
            GcsOutputChannel writeChannel;

            writeChannel = gcsService.createOrReplace(gcsFileName, options);
            writeChannel.write(ByteBuffer.wrap(content.getBytes("UTF-8")));
            writeChannel.close();
        } catch (IOException e) {
            Log.w(e);
        }
    }