Audio 未在Blackberry中播放音频文件

我正试着播放一个录制的波形文件。播放时，在以下语句中引发异常：

Player player = Manager.createPlayer(is, "audio/mpeg");

我播放wave文件的全部代码如下：

if (types[cnt].equals("audio/x-wav")) {
    Class clazz = Class.forName("RecordAudio");
    InputStream is =  
        clazz.getResourceAsStream("file:///SDCard/BlackBerry/original.wav");
    //create an instance of the player from the InputStream
    Player player = Manager.createPlayer(is, "audio/mpeg");
    player.realize();
    player.prefetch();
    //start the player
    player.start();
} 

---

有什么问题吗？

我认为是因为MIME类型错误。试试这个：

String fileName = "file:///SDCard/BlackBerry/original.wav";
String mimeType = "audio/x-wav";
String types[] = javax.microedition.media.Manager
        .getSupportedContentTypes(null);
for (int cnt = types.length - 1; cnt >= 0; --cnt) {
    if (types[cnt].equals(mimeType)) {
        InputStream is = null;
        FileConnection fconn = null;
        try {
            fconn = (FileConnection) Connector.open(
            fileName, Connector.READ);
        } catch (IOException e) {
            System.out.println("Error reading file");
        }
        try {
            is = fconn.openInputStream();
        } catch (IOException e) {
            System.out.println("Error opening stream");
        }
        Player player = null;
        try {
            player =                    
            javax.microedition.media.Manager.createPlayer(
            is, mimeType);
        } catch (IOException e) {
            System.out.println("Error creating player");
        } catch (MediaException e) {
            System.out.println("Error media type");
        }
        try {
            player.realize();
        } catch (MediaException e) {
            System.out.println("Player cannot be released");
        }
        try {
            player.prefetch();
        } catch (MediaException e) {
            System.out.println("Player cannot be prefetched");
        }
        // start the player
        try {
            player.start();
        } catch (MediaException e) {
            System.out.println("Player cannot be started");
        }
    }
}

---

还可以在控制台中查看引发了何种异常。

函数getResourceAsStream用于从JAR/COD文件而不是文件系统中提取资源。另外，这比你做的要简单。只需将文件名和路径传递给createPlayer，如下所示：

try {
    String filename = "file:///SDCard/BlackBerry/original.wav";
    Player player = javax.microedition.media.Manager.Manager.createPlayer( filename );
} catch (IOException e) {
    System.out.println("Error creating player");
} catch (MediaException e) {
    System.out.println("Error media type");
}

---

如果你能在问题中提供更多的信息（rim操作系统版本，bb型号），并格式化你的代码，这将是很有帮助的。谢谢你好，Coldice，很抱歉代码格式错误。我正在使用BB Pearl 8100设备和o.s.version 4.5.0.81感谢Marc对代码进行格式化…执行已在以下位置停止：InputStream is=clazz.getResourceAsStream（“file:///SDCard/BlackBerry/original.wav");在调试器控制台上，显示FRIDG:找不到文件：/SDCard/BlackBerry/original.wav。但该文件存在于指定位置。我还尝试播放其他文件，但没有播放任何文件…请帮助。根据Fostah回答更新。别忘了模拟SD卡；）嗨，我试过上面的代码，没有抛出异常…但是媒体播放器没有被激活。调试器控制台打印的东西是：MN:GetPlayableS0（0）=1 MN:getLength0（0）=0 MN:GetPlayableS0（0）=1 MN:isSeekable0（0）=1 AR:add source 10 AR:setAudioMode 32 MN:play0（0）是音频，没有检查活动暂停MN:play0（0）=0 MN:MEDIA_STOPPED received MN:handle=0 staticsHandle=7fffffff AUDIOMANAGER:IOException MN:unload0（0）=2 pauseHandle=7fffffff AR:remove source 10 AR:setAudioMode 32