Question

我正在尝试创建一个简单的应用程序来记录音频。我正在使用标准的MediaRecorder来实现这一目标。这是我到目前为止的内容：

我已使用此方法成功启动mediaRecorder

public void startRecording(String filePath) throws IOException {

String state = android.os.Environment.getExternalStorageState();
if (!state.equals(android.os.Environment.MEDIA_MOUNTED)) {
    throw new IOException("SD Card is not mounted.  It is " + state + ".");
}

// make sure the directory we plan to store the recording in exists
File directory = new File(filePath).getParentFile();
if (!directory.exists() && !directory.mkdirs()) {
    throw new IOException("Path to file could not be created.");
}

recorder.setAudioSource(MediaRecorder.AudioSource.MIC );

recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(filePath);

recorder.setOnErrorListener(errorListener);
recorder.setOnInfoListener(infoListener);

try {
    recorder.prepare();

} catch (Exception e) {
    Timber.e("Error while prepareing media recorder " + e.getMessage());
}

try {

    recorder.start();
    SharedPrefs.setIsRecording(true);
    Timber.d("Started to record " + SharedPrefs.isRecording());

} catch (Exception e) {
    Timber.e("Error while starting the media recorder " + e.getMessage());
} }

这很好，我可以在本地看到该文件是在指定文件夹中创建的。

现在这是我用来停止录制的内容：

public void stopRecording() {

if (recorder == null) {
        Timber.e("recorder is null");
    }

if (SharedPrefs.isRecording()) {

    try {
        recorder.stop();

    } catch (Exception r) {
        Timber.e("Error while attempting to stop " + r.getMessage());
    }

    try {
        recorder.release();

    } catch (Exception e) {
        Timber.e("Error while attempting to release " + e.getMessage());
    }

    Timber.e("We stopped recording");
    SharedPrefs.setIsRecording(false);

} else {
    Timber.e("Attempting to stop recording while not recording ");
} }

现在，当调用stopRecording（）时，这是我得到的错误消息：

 E/MediaRecorder: stop called in an invalid state:1

AudioRecorder：尝试停止为空时出错

注意：当我在本地转到文件所在的文件夹并刷新它时，我看到文件的大小正在增加。

谢谢！

媒体记录器停止在无效状态

0 个答案: