ano*_*eal 4 android alexa kotlin
我计划开发一个带有 Alexa 语音服务集成的 Android 应用程序来开发一个像 Reverb 的应用程序。以下是我尝试过的...
检查 AVS 设备 SDK，可以获得在 Android 中实现它的正确指南。
计划自己实现，下面是我所做的。
一种。集成登录框架，能够成功登录并获取令牌。
湾 创建了一个录音机，能够在本地录制和播放。
C。创建了将音频发送到https://avs-alexa-eu.amazon.com/v20160207/events 的请求
[更新]
将 shortArray 更改为 Byte 数组后，我得到了响应，但现在的问题是 MediaPlayer 无法播放响应 mp3，它在准备时出错
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
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我想通了，我正在为 OKHttp 使用 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，并且由于某些原因原因，这些值也保留在字节数组中......它曾经提供格式错误的 mp3 文件。移除拦截器后……它开始工作了……所以第 1 步就完成了……还有更多工作要做。
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