Question

我计划开发一个与Alexa语音服务集成的Android应用程序来开发像Reverb这样的应用程序。以下是我的尝试......

经过检查的AVS设备SDK，可以获得在Android中实施它的正确指南。
已检查https://github.com/willblaschko/AlexaAndroid，无法使其正常工作。
计划实施自己，下面就是我所做的。

一个。集成登录框架，能够成功登录并获取令牌。

湾创建了录音机，能够在本地录制和播放。

℃。创建了将音频发送到https://avs-alexa-eu.amazon.com/v20160207/events

[增订]

将shortArray更改为Byte数组后我得到了响应，但现在问题是MediaPlayer无法播放响应mp3，在准备时出错

package com.example.anoopmohanan.alexaandroid

import android.content.Context
import android.media.*
import android.media.AudioFormat.ENCODING_PCM_16BIT
import android.media.AudioFormat.CHANNEL_CONFIGURATION_MONO
import android.os.Environment
import android.os.Environment.getExternalStorageDirectory
import java.io.*
import com.example.anoopmohanan.alexaandroid.ResponseParser.getBoundary
import okhttp3.*
import org.jetbrains.anko.doAsync
import org.json.JSONObject
import java.nio.file.Files.exists
import okhttp3.OkHttpClient
import java.net.HttpURLConnection
import android.os.Looper
import android.os.PowerManager
import android.util.Log
import okio.BufferedSink
import okhttp3.RequestBody
import org.apache.commons.io.FileUtils
import org.jetbrains.anko.Android
import org.jetbrains.anko.runOnUiThread
import org.jetbrains.anko.toast
import java.util.*
import okhttp3.ResponseBody
import okio.Buffer
import com.example.anoopmohanan.alexaandroid.SoundRecorder.LoggingInterceptor
import android.media.MediaDataSource






class SoundRecorder(context: Context) {

    private var appcontext: Context? = null
    private var recording = false
    val MEDIA_JSON = MediaType.parse("application/json; charset=utf-8")
    val MEDIA_TYPE_AUDIO = MediaType.parse("application/octet-stream")
    var accessToken = ""
    private var mediaPlayer: MediaPlayer? = null
    private var streamToSend:ByteArray? = null
    private val client = OkHttpClient.Builder()
            .addInterceptor(LoggingInterceptor())
            .build()

    init {
        this.appcontext = context

    }
    fun startRecording(accessToken: String){
        this.accessToken = accessToken
        doAsync {
            startRecord()
        }

    }

    fun stopRecording(){

        doAsync {
            stopRecord()
        }

    }

    fun playRecording(){

        doAsync {
            playRecord()
        }

    }
    private fun stopRecord(){

        recording = false
        //val file = File(Environment.getExternalStorageDirectory(), "test.pcm")
        //sendAuio(file)
    }

    fun playRecord() {

        val file = File(Environment.getExternalStorageDirectory(), "speech2.mp3")

            val mplayer = MediaPlayer()
            mplayer.setDataSource(file.path)
            mplayer.prepare()
            mplayer.start()
//        val file = File(Environment.getExternalStorageDirectory(), "test.pcm")
//
//        val shortSizeInBytes = java.lang.Short.SIZE / java.lang.Byte.SIZE
//
//        val bufferSizeInBytes = (file.length() / shortSizeInBytes).toInt()
//        val audioData = ByteArray(bufferSizeInBytes)
//
//        try {
//            val inputStream = FileInputStream(file)
//            val bufferedInputStream = BufferedInputStream(inputStream)
//            val dataInputStream = DataInputStream(bufferedInputStream)
//
//            var i = 0
//            while (dataInputStream.available() > 0) {
//                audioData[i] = dataInputStream.readByte()
//                i++
//            }
//
//            dataInputStream.close()
//
//            val audioTrack = AudioTrack.Builder()
//                    .setAudioAttributes(AudioAttributes.Builder()
//                            .setUsage(AudioAttributes.USAGE_MEDIA)
//                            .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
//                            .build())
//                    .setAudioFormat(AudioFormat.Builder()
//                            .setEncoding(AudioFormat.ENCODING_PCM_16BIT)
//                            .setSampleRate(16000)
//                            .setChannelMask(AudioFormat.CHANNEL_OUT_MONO).build())
//                    .setBufferSizeInBytes(bufferSizeInBytes)
//                    .setTransferMode(AudioTrack.MODE_STREAM)
//                    .build()
//
//            audioTrack.play()
//            audioTrack.write(audioData, 0, bufferSizeInBytes)
//
//
//        } catch (e: FileNotFoundException) {
//            e.printStackTrace()
//        } catch (e: IOException) {
//            e.printStackTrace()
//        }

    }



    private fun startRecord() {

        val file = File(Environment.getExternalStorageDirectory(), "test.pcm")

        try {
            file.createNewFile()

            val outputStream = FileOutputStream(file)
            val bufferedOutputStream = BufferedOutputStream(outputStream)
            val dataOutputStream = DataOutputStream(bufferedOutputStream)

            val minBufferSize = AudioRecord.getMinBufferSize(16000,
                    AudioFormat.CHANNEL_IN_MONO,
                    AudioFormat.ENCODING_PCM_16BIT)


            val audioData = ByteArray(minBufferSize)

            val audioRecord = AudioRecord(MediaRecorder.AudioSource.MIC,
                    16000,
                    AudioFormat.CHANNEL_IN_MONO,
                    AudioFormat.ENCODING_PCM_16BIT,
                    800)
            if (audioRecord.recordingState != AudioRecord.RECORDSTATE_STOPPED){

                this.appcontext?.runOnUiThread {
                    toast("No recording source available")
                }

                return
            }
            recording = true
            audioRecord.startRecording()
            if (audioRecord.recordingState != AudioRecord.RECORDSTATE_RECORDING){

                this.appcontext?.runOnUiThread {
                    toast("Someone is still recording")
                }
                recording = false
                audioRecord.stop()
                audioRecord.release()
                return
            }

            this.appcontext?.runOnUiThread {
                toast("Recording started hurray")
            }
            while (recording) {
                audioRecord.read(audioData, 0, minBufferSize)
                dataOutputStream.write(audioData,0,minBufferSize)
//                for (i in 0 until numberOfShort) {
//                    dataOutputStream.writeShort(audioData[i].toInt())
//                }
            }

            audioRecord.stop()
            audioRecord.release()
            dataOutputStream.close()
            sendAuio(file)

        } catch (e: IOException) {

            e.printStackTrace()
        }

    }

    fun sendAuio(audio: File){

        streamToSend = audio.readBytes()
        val requestBody = MultipartBody.Builder()
                .setType(MultipartBody.FORM)
                .addFormDataPart("metadata","metadata",RequestBody.create(MEDIA_JSON, generateSpeechMetadata()))
                .addFormDataPart("audio", "test.pcm",
                        RequestBody.create(MEDIA_TYPE_AUDIO, streamToSend))
                .build()

        val request = Request.Builder()
                .url("https://avs-alexa-eu.amazon.com/v20160207/events")
                .addHeader("Authorization","Bearer $accessToken")
                .post(requestBody)
                .build()
        print (request.body().toString())
        client.newCall(request).execute().use({ response ->
            if (!response.isSuccessful()) throw IOException("Unexpected code $response")

            val items = if (response.code() == HttpURLConnection.HTTP_NO_CONTENT)
                AvsResponse()
            else
                ResponseParser.parseResponse(response.body()!!.byteStream(), getBoundary(response))
            if (items.size > 0){

                handle(items)
            }
            System.out.println("[TRACE]"+response.body()!!.string())
        })
    }

    @Throws(IOException::class)
    fun toByteArray(`in`: InputStream): ByteArray {
        val out = ByteArrayOutputStream()
        var read = 0
        val buffer = ByteArray(1024)
        while (read != -1) {
            read = `in`.read(buffer)
            if (read != -1)
                out.write(buffer, 0, read)
        }
        out.close()
        return out.toByteArray()
    }
    private fun generateSpeechMetadata(): String {
        val messageId = UUID.randomUUID().toString();
        val dialogId = UUID.randomUUID().toString();

        return  "{\"event\": {\"header\": {\"namespace\": \"SpeechRecognizer\",\"name\": \"Recognize\",\"messageId\": \"$messageId\",\"dialogRequestId\": \"$dialogId\"},\"payload\": {\"profile\": \"CLOSE_TALK\", \"format\": \"AUDIO_L16_RATE_16000_CHANNELS_1\"}},\"context\": [{\"header\": {\"namespace\": \"AudioPlayer\",\"name\": \"PlaybackState\"},\"payload\": {\"token\": \"\",\"offsetInMilliseconds\": 0,\"playerActivity\": \"FINISHED\"}}, {\"header\": {\"namespace\": \"SpeechSynthesizer\",\"name\": \"SpeechState\"},\"payload\": {\"token\": \"\",\"offsetInMilliseconds\": 0,\"playerActivity\": \"FINISHED\"}}, { \"header\" : { \"namespace\" : \"Alerts\", \"name\" : \"AlertsState\" }, \"payload\" : { \"allAlerts\" : [ ], \"activeAlerts\" : [ ] } }, {\"header\": {\"namespace\": \"Speaker\",\"name\": \"VolumeState\"},\"payload\": {\"volume\": 25,\"muted\": false}}]}"
//        return "{\n" +
//                "\"messageHeader\": {\n" +
//                "\"deviceContext\": [\n" +
//                "{\n" +
//                "\"name\": \"playbackState\",\n" +
//                "\"namespace\": \"AudioPlayer\",\n" +
//                "\"payload\": {\n" +
//                "\"streamId\": \"\",\n" +
//                "\"offsetInMilliseconds\": \"\",\n" +
//                "\"playerActivity\": \"IDLE\"\n" +
//                "}\n" +
//                "}\n" +
//                "]\n" +
//                "},\n" +
//                "\"messageBody\": {\n" +
//                "\"profile\": \"doppler-scone\",\n" +
//                "\"locale\": \"en-us\",\n" +
//                "\"format\": \"audio/L16; rate=16000; channels=1\"\n" +
//                "}\n" +
//                "}"
    }


    private val audioRequestBody = object : RequestBody() {
        override fun contentType(): MediaType? {
            return MediaType.parse("application/octet-stream")
        }

        @Throws(IOException::class)
        override fun writeTo(sink: BufferedSink?) {
            //while our recorder is not null and it is still recording, keep writing to POST data
            sink!!.write(streamToSend)
        }
    }

    inner class LoggingInterceptor : Interceptor {
        @Throws(IOException::class)
        override fun intercept(chain: Interceptor.Chain): Response {
            val request = chain.request()

            val t1 = System.nanoTime()
            Log.d("OkHttp", String.format("--> Sending request %s on %s%n%s", request.url(), chain.connection(), request.headers()))

            val requestBuffer = Buffer()
            request.body()?.writeTo(requestBuffer)
            Log.d("OkHttp", requestBuffer.readUtf8())

            val response = chain.proceed(request)

            val t2 = System.nanoTime()
            Log.d("OkHttp", String.format("<-- Received response for %s in %.1fms%n%s", response.request().url(), (t2 - t1) / 1e6, response.headers()))

            val contentType = response.body()?.contentType()
            val content = response.body()?.string()
            Log.d("OkHttp", content)

            val wrappedBody = ResponseBody.create(contentType, content)
            return response.newBuilder().body(wrappedBody).build()
        }
    }


    private fun getMediaPlayer(): MediaPlayer? {
        if (mediaPlayer == null) {
            mediaPlayer = MediaPlayer()
        }
        return mediaPlayer
    }

    fun handle(items:AvsResponse){

        for (item in items){
            handle(item)
        }
    }
    fun handle(item: AvsItem){


        if (item is AvsSpeakItem){

        }else{
            return
        }
        //cast our item for easy access
        //write out our raw audio data to a file
        val path = File(Environment.getExternalStorageDirectory(), "speech.mp3")

        //path.deleteOnExit()
        //val path = File(appcontext!!.getCacheDir(), System.currentTimeMillis().toString() + ".mp3")
        //var fos: FileOutputStream? = null
        try {
//            fos = FileOutputStream(path)
//            fos!!.write(item.audio)
//            fos.close()

            path.createNewFile()
            path.writeBytes(item.audio)
//            var ds = ByteArrayMediaDataSource(item.audio)
//            val fis = FileInputStream(path)
//            //play our newly-written file
//            val mplayer = MediaPlayer()
//            mplayer.setDataSource(path.path)
//            mplayer.prepare()
//            mplayer.start()
//            getMediaPlayer()?.setDataSource(fis.fd)
//            getMediaPlayer()?.prepare()
//            getMediaPlayer()?.start()
        } catch (e: IOException) {
            e.printStackTrace()

        } catch (e: IllegalStateException) {
            e.printStackTrace()
        }

    }


    inner class ByteArrayMediaDataSource(private val data: ByteArray?) : MediaDataSource() {

        init {
            assert(data != null)
        }

        @Throws(IOException::class)
        override fun readAt(position: Long, buffer: ByteArray, offset: Int, size: Int): Int {
            System.arraycopy(data, position.toInt(), buffer, offset, size)
            return size
        }

        @Throws(IOException::class)
        override fun getSize(): Long {
            return data?.size?.toLong()!!
        }

        @Throws(IOException::class)
        override fun close() {
            // Nothing to do here
        }
    }
}

来自ALEXA的回应

--------abcde123
Content-Type: application/json; charset=UTF-8

{"directive":{"header":{"namespace":"SpeechSynthesizer","name":"Speak","messageId":"d58c83fe-377f-4d1d-851b-a68cf5686280","dialogRequestId":"d83b8496-e6a5-4fc5-b07b-32f70acd1f15"},"payload":{"url":"cid:2aed5305-081d-4624-b2ba-ef51eba6aa32_1353236331","format":"AUDIO_MPEG","token":"amzn1.as-ct.v1.Domain:Application:Knowledge#ACRI#2aed5305-081d-4624-b2ba-ef51eba6aa32"}}}
--------abcde123
Content-ID: <2aed5305-081d-4624-b2ba-ef51eba6aa32_1353236331>
Content-Type: application/octet-stream

ID3#TSSELavf57.71.100dUC\[QwwD뻝q    \[D*An. .`>X>>@|L?&|>4=A?w'<<Ɨd"_h{[M̢8j8ǙbA

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Answer 1

我想通了，我正在使用一个用于OKHttp的LoggingInterceptor，它用于将字节转换为字符串并记录它，由于某种原因，它无法识别某些字符并且它为这些字符提供了一些垃圾值由于某种原因，这些值仍然存在于字节数组中......也就是用来提供格式错误的mp3文件。在移除拦截器之后......它开始工作......所以第1步已经完成......还有更多工作要做。

如何将Alexa语音服务集成到自定义Android应用程序

1 个答案: