BlackBerry 10使用Google TTS做中文文本朗读，开发语言C++ Qt Cascade

首先，我们测试一下Google TTS英文文本朗读

命令行测试：
wget -q -U Mozilla -O "helloworld.mp3" "http://translate.google.com/translate_tts?ie=UTF-8&tl=en&q=hello+world"

然后我们编写一段Qt代码，测试中文语音朗读，下载后的文件名叫 translate_tts，在手机该应用的data目录，比如

/accounts/1000/appdata/com.example.Hello1Standard.testDev_lo1Standard73e1edad/data

我们可以把这个mp3文件拷贝到BlackBerry 10的Windows网盘上面，然后把手机USB连接到PC机上，在PC机上播放。也可以在手机上用“音乐”程序直接播放。

cp translate_tts.mp3 /accounts/1000/shared/music/helloworld.mp3

Qt代码如下：

/** 设置编码 begin  **/QTextCodec *codec = QTextCodec::codecForName("UTF-8");QTextCodec::setCodecForLocale(codec);QTextCodec::setCodecForCStrings(codec);QTextCodec::setCodecForTr(codec);/** 设置编码  end **/    DownloadManager* downloader = new DownloadManager(&app);    QString url = "http://translate.google.com/translate_tts?&tl=zh-CN&q=北京欢迎你";    QUrl qurl = QUrl::fromEncoded(url.toLocal8Bit());    downloader->SingleDownload(qurl);

DownloadManager.h头文件

#ifndef DOWNLOADMANAGER_H#define DOWNLOADMANAGER_H#include <QFile>#include <QObject>#include <QQueue>#include <QTime>#include <QUrl>#include <QtNetwork/QNetworkAccessManager>class DownloadManager: public QObject{    Q_OBJECTpublic:    DownloadManager(QObject *parent = 0);    void append(const QUrl &url);    void append(const QStringList &urlList);    void SingleDownload(QUrl url);signals:    void finished();    void progress(qint64 bytesReceived, qint64 bytesTotal, QString message);private slots:    void startNextDownload();    void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);    void downloadFinished();    void downloadReadyRead();private:    QString saveFileName(const QUrl &url);    QNetworkAccessManager manager;    QQueue<QUrl> downloadQueue;    QNetworkReply *currentDownload;    QString currentDownloadSaveFileName;    QFile output;    QTime downloadTime;    int downloadedCount;    int totalCount;};#endif

DownloadManager.cpp文件

#include "downloadmanager.h"#include <QFileInfo>#include <QtNetwork/QNetworkRequest>#include <QtNetwork/QNetworkReply>#include <QString>#include <QStringList>#include <QTimer>#include <QDir>#include <stdio.h>#include <QEventLoop>#include <QDebug>DownloadManager::DownloadManager(QObject *parent)    : QObject(parent), downloadedCount(0), totalCount(0){}void DownloadManager::append(const QStringList &urlList){    foreach (QString url, urlList)        append(QUrl::fromEncoded(url.toLocal8Bit()));    if (downloadQueue.isEmpty())        QTimer::singleShot(0, this, SIGNAL(finished()));}void DownloadManager::append(const QUrl &url){    if (downloadQueue.isEmpty())        QTimer::singleShot(0, this, SLOT(startNextDownload()));    downloadQueue.enqueue(url);    ++totalCount;}QString DownloadManager::saveFileName(const QUrl &url){    QString modDir = "data";//data is for BlackBerry 10 app, 使用相对目录    QDir downloadDir(modDir);    QString path = url.path();    QString basename = modDir + "/" + QFileInfo(path).fileName();    //如果下载url没有文件名，或者文件名后缀，则取名download    if (basename.isEmpty())        basename = "download";    if (QFile::exists(basename)) {        // already exists, don't overwrite        int i = 0;        basename += '.';        while (QFile::exists(basename + QString::number(i)))            ++i;        basename += QString::number(i);    }    return basename;}void DownloadManager::startNextDownload(){    if (downloadQueue.isEmpty()) {        printf("%d/%d files downloaded successfully\n", downloadedCount, totalCount);        emit finished();        return;    }    QUrl url = downloadQueue.dequeue();    QString filename = saveFileName(url);    qWarning("Downloading to: %s", filename.toLocal8Bit().data());    output.setFileName(filename);    if (!output.open(QIODevice::WriteOnly)) {        fprintf(stderr, "Problem opening save file '%s' for download '%s': %s\n",                qPrintable(filename), url.toEncoded().constData(),                qPrintable(output.errorString()));        startNextDownload();        return;                 // skip this download    }    QNetworkRequest request(url);    currentDownload = manager.get(request);    connect(currentDownload, SIGNAL(downloadProgress(qint64,qint64)),            SLOT(downloadProgress(qint64,qint64)));    connect(currentDownload, SIGNAL(finished()),            SLOT(downloadFinished()));    connect(currentDownload, SIGNAL(readyRead()),            SLOT(downloadReadyRead()));    // prepare the output    printf("Downloading %s...\n", url.toEncoded().constData());    downloadTime.start();}void DownloadManager::SingleDownload(QUrl url) {    QString filename = saveFileName(url) + ".mp3";    qWarning("Downloading to: %s", filename.toLocal8Bit().data());    qWarning("Downloading From: %s", url.path().toLocal8Bit().data());    output.setFileName(filename);    if (!output.open(QIODevice::WriteOnly)) {        fprintf(stderr, "Problem opening save file '%s' for download '%s': %s\n",                qPrintable(filename), url.toEncoded().constData(),                qPrintable(output.errorString()));        //startNextDownload();        return;                 // skip this download    }    qWarning("Beginning Download");    QNetworkRequest request;    request.setUrl(url);    currentDownload = manager.get(request);    connect(currentDownload, SIGNAL(downloadProgress(qint64,qint64)),SLOT(downloadProgress(qint64,qint64)));    connect(currentDownload, SIGNAL(finished()),SLOT(downloadFinished()));    connect(currentDownload, SIGNAL(readyRead()),            SLOT(downloadReadyRead()));    //currentDownload->startTimer(1000);    //currentDownload->open(QIODevice::ReadOnly);    //currentDownload->request();    downloadTime.start();}void DownloadManager::downloadProgress(qint64 bytesReceived, qint64 bytesTotal){    //progressBar.setStatus(bytesReceived, bytesTotal);    // calculate the download speed    double speed = bytesReceived * 1000.0 / downloadTime.elapsed();    QString unit;    if (speed < 1024) {        unit = "bytes/sec";    } else if (speed < 1024*1024) {        speed /= 1024;        unit = "kB/s";    } else {        speed /= 1024*1024;        unit = "MB/s";    }    QString spd = QString::number(speed);    progress(bytesReceived, bytesTotal, "Downloading at: " + spd + unit);    spd = "Downloading at: " + spd + unit;    qDebug() << "Downloading at: " << spd  + " " + unit;    qDebug() << bytesReceived << " bytes received";    qDebug() <<  bytesTotal + " bytes Total.";    //progressBar.setMessage(QString::fromLatin1("%1 %2")                           //.arg(speed, 3, 'f', 1).arg(unit));    //progressBar.update();}void DownloadManager::downloadFinished(){    //progressBar.clear();    output.close();    if (currentDownload->error()) {        // download failed        fprintf(stderr, "Failed: %s\n", qPrintable(currentDownload->errorString()));    } else {        printf("Succeeded.\n");        ++downloadedCount;    }    qDebug() << "output file name " << output.fileName();    currentDownloadSaveFileName = output.fileName();    qWarning("downloadFinished");    finished();    currentDownload->deleteLater();    startNextDownload();}void DownloadManager::downloadReadyRead(){qWarning("downloadReadyRead");    output.write(currentDownload->readAll());}

参考：

google text-to-speech API及参考资料
http://hi.baidu.com/sjbh_blog/item/10844d3be0676ac5382ffa5e

downloadmanager应该是Nokia官方的例子代码，可以google一下 qt downloadmanager.h