Android 应用程序在开始使用 Watson STT java-sdk 录制语音时崩溃

Question

我之前让这段代码在我的设备上运行良好，但现在它根本无法运行。设备是三星 SM-G900P(Android 6.0.2，API23)。

我必须自己构建语音转文本库、核心库和文本转语音库，因为我的应用程序的其他部分需要更新版本的 OkHttp 库。我是从 PR #557 构建的。

这是我在通过 Android Studio 运行时遇到的错误。

E/AudioRecord: AudioFlinger could not create record track, status: -1
E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1.
E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.

E/AndroidRuntime: FATAL EXCEPTION: Thread-5952
              java.lang.IllegalStateException: startRecording() called on an uninitialized AudioRecord.
                  at android.media.AudioRecord.startRecording(AudioRecord.java:943)
                  at com.ibm.watson.developer_cloud.android.library.audio.MicrophoneCaptureThread.run(MicrophoneCaptureThread.java:63)

一些代码...

private void startListening() {

    if (listening != true) {
        capture = new MicrophoneInputStream(true);
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    speechService.recognizeUsingWebSocket(capture, getRecognizeOptions(), new MicrophoneRecognizeDelegate());
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();
        listening = true;
    } else {
        try {
            capture.close();
            listening = false;
            //recordInstance.release();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

private class MicrophoneRecognizeDelegate implements RecognizeCallback {

    @Override
    public void onTranscription(SpeechResults speechResults) {
        System.out.println(speechResults);
        String text = speechResults.getResults().get(0).getAlternatives().get(0).getTranscript();
        showMicText(text);
        if (speechResults.getResults().get(0).isFinal()) {
            try {
                capture.close();
                listening = false;
                send(speechResults.getResults().get(0).getAlternatives().get(0).getTranscript());
            } catch (Exception e) {
                System.out.println("error when closing capture");
                e.printStackTrace();
            }
        }

    }

    @Override public void onConnected() {
        System.out.println("mic connected");
    }

    @Override public void onError(Exception e) {
        e.printStackTrace();
    }

    @Override public void onDisconnected() {
        System.out.println("mic disconnected");
    }
}

谢谢

Answer 1

在我看来，您没有适当的权限来录制音频；通常这就是 AudioFlinger 无法创建记录轨道，状态:-1 指示的内容。从 API 23 开始，您需要在应用程序运行时请求某些权限；录音属于该集合。查看https://developer.android.com/training/permissions/requesting.html