Develop Reference

How to call tokenURI() function in ERC721 using Web3j library?

I need to view NFT-image with all metadata. I decide to call tokenURI() function like it, but it's ain't working
private fun getNFTMetadata() = viewModelScope.launch(Dispatchers.IO){
//tokenURI -- by token ID
val web3j: Web3j = createWeb3j() ?: return#launch
var ids = listOf<Uint256>(Uint256.DEFAULT)
val function: org.web3j.abi.datatypes.Function = org.web3j.abi.datatypes.Function(
"tokenURI",
ids,
listOf()
)
val encodedFunction = FunctionEncoder.encode(function)
val response: EthCall = web3j.ethCall(
Transaction.createEthCallTransaction(WALLET_ADDRESS, CONTRACT_ADDRESS, encodedFunction),
LATEST
).sendAsync().get()
if (response.value != null){
state.value = response.value
} else {
state.value = "NAN"
}
}
private fun createWeb3j(): Web3j? {
val webSocketService = WebSocketService(WEB_SOCKET_URL, true)
try {
webSocketService.connect()
} catch (e: ConnectException) {
e.printStackTrace()
}
return Web3j.build(webSocketService)
}
I really don't know how to call that function rightly. Help me please!)

I found my mistake. I had change received parameters.
private fun getNFTMetadata() = viewModelScope.launch(Dispatchers.IO){
//tokenURI -- by token ID
val web3j: Web3j = createWeb3j() ?: return#launch
val big: Uint256 = Uint256(1)
val function: org.web3j.abi.datatypes.Function = org.web3j.abi.datatypes.Function(
"tokenURI",
listOf(big),
listOf(object : TypeReference<Utf8String>() {})
)
val encodedFunction = FunctionEncoder.encode(function)
val response: EthCall = web3j.ethCall(
Transaction.createEthCallTransaction(WALLET_ADDRESS, CONTRACT_ADDRESS, encodedFunction),
LATEST
).sendAsync().get()
if (response.value != null){
state.value = response.value
} else {
state.value = "NAN"
}
}

Uploading multiple files with Retrofit 2 to Spring Webflux backend

I get the following error when I try to upload multiple files with retrofit 2:
org.springframework.core.codec.DecodingException: Could not find first boundary
When I upload multiple files with postman on the same API endpoint, it works perfectly.
Server controller endpoint:
#PostMapping("{loveSpotId}/photos")
suspend fun uploadToSpot(
#PathVariable loveSpotId: Long,
#RequestPart("photos") filePartFlux: Flux<FilePart>
) {
loveSpotPhotoService.uploadToSpot(loveSpotId, filePartFlux.asFlow())
}
Retrofit API definition:
interface LoveSpotPhotoApi {
#Multipart
#POST("/lovespots/{loveSpotId}/photos")
fun uploadToLoveSpot(
#Path("loveSpotId") loveSpotId: Long,
#Part photos: List<MultipartBody.Part>
): Call<ResponseBody>
// ...
}
Reading photos on Android device:
if (activityResult.resultCode == Activity.RESULT_OK) {
val itemCount: Int = activityResult.data?.clipData?.itemCount ?: 0
val files = ArrayList<File>()
for (i in 0 until itemCount) {
val clipData = activityResult.data!!.clipData!!
val uri = clipData.getItemAt(i).uri
files.add(File(uri.path!!))
}
loveSpotPhotoService.uploadToLoveSpot(loveSpotId, files, this#LoveSpotDetailsActivity)
}
Client code using Retrofit:
suspend fun uploadToLoveSpot(loveSpotId: Long, photos: List<File>, activity: Activity) {
val loadingBarShower = LoadingBarShower(activity).show()
withContext(Dispatchers.IO) {
val parts: List<MultipartBody.Part> = photos.map { prepareFilePart(it) }
val call = loveSpotPhotoApi.uploadToLoveSpot(loveSpotId, parts)
try {
val response = call.execute()
loadingBarShower.onResponse()
if (response.isSuccessful) {
toaster.showToast(R.string.photo_uploaded_succesfully)
} else {
toaster.showResponseError(response)
}
} catch (e: Exception) {
loadingBarShower.onResponse()
toaster.showToast(R.string.photo_upload_failed)
}
}
}
private fun prepareFilePart(file: File): MultipartBody.Part {
// create RequestBody instance from file
val requestFile = RequestBody.create(
MediaType.get("image/*"),
file
)
// MultipartBody.Part is used to send also the actual file name
return MultipartBody.Part.createFormData("photos", file.name, requestFile)
}
Example headers logged on server when I upload with postman and it works:
[Authorization:"Bearer ...", User-Agent:"PostmanRuntime/7.30.0", Accept:"/", Postman-Token:"7ad875eb-2fe5-40ea-99f0-3ad34c3fa875", Host:"localhost:8090", Accept-Encoding:"gzip, deflate, br", Connection:"keep-alive", Content-Type:"multipart/form-data; boundary=--------------------------877409032202838734061440", content-length:"1555045"]
Example headers logged on server when I upload with retrofit client and it fails:
[Authorization:"Bearer ...", Content-Type:"multipart/form-data; boundary=c6177139-6b31-4d91-b66d-54772a51d963", Host:"192.168.0.143:8090", Connection:"Keep-Alive", Accept-Encoding:"gzip", User-Agent:"okhttp/3.14.9", content-length:"528"]

The problem was that I was not reading photos from the Android device properly. Here is my code that fixed that:
launcher =
registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { activityResult ->
handlePhotoPickerResult(activityResult)
}
fun startPickerIntent(launcher: ActivityResultLauncher<Intent>) {
val intent = Intent()
intent.type = "image/*"
intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true)
intent.action = Intent.ACTION_PICK
launcher.launch(intent)
}
private fun handlePhotoPickerResult(activityResult: ActivityResult) {
MainScope().launch {
if (activityResult.resultCode == RESULT_OK) {
val files = PhotoUploadUtils.readResultToFiles(activityResult, contentResolver)
Log.i(this#LoveSpotDetailsActivity::class.simpleName, "Starting upload")
val result: Boolean = if (photoUploadReviewId != null) {
loveSpotPhotoService.uploadToReview(
loveSpotId,
photoUploadReviewId!!,
files,
this#LoveSpotDetailsActivity
)
} else {
loveSpotPhotoService.uploadToLoveSpot(
loveSpotId,
files,
this#LoveSpotDetailsActivity
)
}
photosLoaded = !result
photosRefreshed = !result
photoUploadReviewId = null
if (result) {
Log.i(
this#LoveSpotDetailsActivity::class.simpleName,
"Upload finished, starting refreshing views."
)
startPhotoRefreshSequence()
}
} else {
toaster.showToast(R.string.failed_to_access_photos)
}
}
}
fun readResultToFiles(
activityResult: ActivityResult,
contentResolver: ContentResolver
): List<File> {
val itemCount: Int = activityResult.data?.clipData?.itemCount ?: 0
val files = ArrayList<File>()
for (i in 0 until itemCount) {
val clipData = activityResult.data!!.clipData!!
val uri = clipData.getItemAt(i).uri
Log.i("uri", "$uri")
addToFilesFromUri(uri, files, contentResolver)
}
return files
}
private fun addToFilesFromUri(
uri: Uri,
files: ArrayList<File>,
contentResolver: ContentResolver
) {
val projection = arrayOf(MediaStore.MediaColumns.DATA)
contentResolver.query(uri, projection, null, null, null)
?.use { cursor ->
if (cursor.moveToFirst()) {
val columnIndex = cursor.getColumnIndex(MediaStore.MediaColumns.DATA)
Log.i("columnIndex", "$columnIndex")
val filePath = cursor.getString(columnIndex)
Log.i("filePath", " $filePath")
if (filePath != null) {
val file = File(filePath)
Log.i("file", "$file")
files.add(file)
}
}
}
}
Rest of the code was fine.

How to use okhttp to create a stream of data and write into device in android

What I am doing: I am using a connection to download file from server and write into a storage
What is happening: Code is working
What I am trying to do: How to achieve the same using okhttp
try {
val url = URL(DICTIONARY_FILE_URL)
val conection = url.openConnection()
conection.connect()
// getting file length
// input stream to read file - with 8k buffer
val input = BufferedInputStream(url.openStream(), 8192)
// Output stream to write file
val directoryPathName = Environment.getExternalStorageDirectory().absolutePath.plus("/CNX/dictionary/")
val dictionaryFileName = "DictionaryEN.quickdic"
var f = File(directoryPathName)
if(!f.isDirectory) {
f.mkdirs()
}
val output = FileOutputStream(directoryPathName.plus(dictionaryFileName))
val data = ByteArray(1024)
var count: Int? = 0
while ({ count = input.read(data);count }() != -1) {
output.write(data, 0, count!!)
}
// flushing output
output.flush()
// closing streams
output.close()
input.close()
isJobSuccess = true
//sharedPreferences[IS_DICTIONARY_DOWNLOADED] = true
} catch (e: Exception) {
Log.e("Exception",e.message)
isJobSuccess = false
//sharedPreferences[IS_DICTIONARY_DOWNLOADED] = false
}

Sample for Downloading a file with OkHttp asynchronously
fun downloadFileAsync(downloadUrl: String) {
val client = OkHttpClient();
val request = Request.Builder().url(downloadUrl).build();
client.newCall(request).enqueue(object : Callback {
override fun onFailure(call: Call, e: IOException) {
Log.e("fail", e.printStackTrace().toString())
}
override fun onResponse(call: Call, response: Response) {
if (!response.isSuccessful) {
Log.e("fail", "Download error")
}else{
// Output stream to write file
val directoryPathName = Environment.getExternalStorageDirectory().absolutePath.plus("/CNX/dictionary/")
val dictionaryFileName = "DictionaryEN.quickdic"
val f = File(directoryPathName)
if(!f.isDirectory) {
f.mkdirs()
}
val output = FileOutputStream(directoryPathName.plus(dictionaryFileName))
response.body?.let {
output.write(it.bytes())
}
// flushing output
output.flush()
// closing streams
output.close()
}
}
})
}
Sample for Downloading a file with OkHttp synchronously
fun downloadFileSync(downloadUrl: String) {
val client = OkHttpClient();
val request = Request.Builder().url(downloadUrl).build();
val response = client.newCall (request).execute();
if (!response.isSuccessful) {
Log.e("fail", "Failed to download file: " + response)
}else {
val directoryPathName = Environment.getExternalStorageDirectory().absolutePath.plus("/CNX/dictionary/")
val dictionaryFileName = "DictionaryEN.quickdic"
val f = File(directoryPathName)
if (!f.isDirectory) {
f.mkdirs()
}
val output = FileOutputStream(directoryPathName.plus(dictionaryFileName))
response.body?.let {
output.write(it.bytes())
}
// flushing output
output.flush()
// closing streams
output.close()
}
}
build.gradle
implementation("com.squareup.okhttp3:okhttp:4.5.0")

Handle no internet connection error of retrofit 2.6 with kotlin coroutines

I'm using retrofit 2.6 with kotlin coroutines to make API call without block the UI thread, I got it work but the app crashes when I switch off the internet connection. The logcat error is: E/AndroidRuntime: FATAL EXCEPTION: DefaultDispatcher-worker-1
Here is my code:
private fun handleIntent(slug: String) {
val service = UtilityMethods.migrationTimeService()
UtilityMethods.showView(loading_view)
UtilityMethods.hideView(network_error_msg)
CoroutineScope(Dispatchers.IO).launch {
val res = service.getPostBySlug(slug)
try {
withContext(Dispatchers.Main) {
//Do something with response e.g show to the UI.
val post = res.body()!!.first()
UtilityMethods.hideView(loading_view)
val title = post.title?.rendered
val content = post.content?.rendered
val imageUrl = post.jetPackFeaturedMediaUrl
title_txtView.text = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
Html.fromHtml(title, Html.FROM_HTML_MODE_COMPACT).toString()
else
Html.fromHtml(title).toString()
content_txtView.loadData(content.toString(), "text/html", "UTF-8")
Picasso.get().load(imageUrl).fit().centerCrop().into(thumbnail_imgview)
}
} catch (e: HttpException) {
UtilityMethods.showView(network_error_msg)
} catch (e: Throwable) {
Toast.makeText(this#PostContentActivity, "Ooops: Something else went wrong", Toast.LENGTH_LONG)
}
}
}

I've got the code working, the new code is:
private fun handleIntent(slug: String) = GlobalScope.launch(Dispatchers.Main) {
val service = UtilityMethods.migrationTimeService()
UtilityMethods.showView(loading_view)
UtilityMethods.hideView(network_error_msg)
try {
val res = withContext(Dispatchers.IO) {
service.getPostBySlug(slug)
}
//Do something with response e.g show to the UI.
val post = res.body()!!.first()
UtilityMethods.hideView(loading_view)
val title = post.title?.rendered
val content = post.content?.rendered
val imageUrl = post.jetPackFeaturedMediaUrl
title_txtView.text = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
Html.fromHtml(title, Html.FROM_HTML_MODE_COMPACT).toString()
else
Html.fromHtml(title).toString()
content_txtView.loadData(content.toString(), "text/html", "UTF-8")
Picasso.get().load(imageUrl).fit().centerCrop().into(thumbnail_imgview)
}
catch (e: HttpException) {
Toast.makeText(this#PostContentActivity, "Exception ${e.message}", Toast.LENGTH_LONG).show()
}catch (e: IOException) {
UtilityMethods.hideView(loading_view)
UtilityMethods.showView(network_error_msg)
} catch (e: Throwable) {
Toast.makeText(this#PostContentActivity, "Ooops: Something else went wrong ${e.message}", Toast.LENGTH_LONG).show()
}
}

So while looking into stacktrace I found that ConnectException is thrown when network is unavailable
And that's how I do it in kotlin and it works for me,
suspend fun<T: Any> safeAPICall(call: suspend () -> Response<T>) : T{
val response = try {
call.invoke()
}
catch (e:java.lang.Exception){
e.printStackTrace()
val message = if( e is ConnectException) "Connection Error" else "Something went wrong. Please try again."
throw IOException(ResponseError(message, 500).convertToJsonString())
}
// When connection is OK
if(response.isSuccessful){
return response.body()!!
}else{
val error = response.errorBody()?.string()
error?.let{
val message = JSONObject(it).optString("message", "Something went wrong")
val responseError = ResponseError(message, response.code())
throw IOException(responseError.convertToJsonString())
}
throw IOException(ResponseError("Something went wrong. Please try again.", 500).convertToJsonString())
}
}
The data class that I use
data class ResponseError(val message:String, val errorCode:Int)
Usage:
try {
val response = safeAPICall {APIClient.planner.viewSites(view.context.authToken)}
}
catch (e:Exception){
view.snack(e.message?.toModel<ResponseError>()?.message?: unspecified_error)
}
Bonus:
inline fun <reified T> JSONObject.toModel(): T? = this.run {
try {
Gson().fromJson<T>(this.toString(), T::class.java)
}
catch (e:java.lang.Exception){ e.printStackTrace(); null }
}
inline fun <reified T> String.toModel(): T? = this.run {
try {
JSONObject(this).toModel<T>()
}
catch (e:java.lang.Exception){ null }
}

Instead of this:
CoroutineScope(Dispatchers.IO).launch {
val res = service.getPostBySlug(slug)
try {
withContext(Dispatchers.Main) {
Try this one:
CoroutineScope(Dispatchers.Main).launch {
val res = service.getPostBySlug(slug)
withContext(Dispatchers.IO) {
try {
wrap your 'try and catch' block code within Dispatchers.IO instead of wraping your Dispatchers.IO with in yout try block

How to Integrate Alexa Voice Service to Custom Android App

I am planning to develop an Android App with Alexa Voice Service integration to develop an app like Reverb. Below is what I have tried...
Checked AVS Device SDK, could get a proper guide to implement it in Android.
Checked https://github.com/willblaschko/AlexaAndroid , wasnt able to get it work.
Planned to implement myself, below is what I have done.
a. Integrated Login framework, was able to successfully login and get the token.
b. Created a sound recorder, was able to record and playback locally.
c. Created request to sent audio to https://avs-alexa-eu.amazon.com/v20160207/events
[UPDATED]
After changing the shortArray to Byte array I am getting the response but now the problem is that MediaPlayer is unable to play the response mp3, it gives error at prepare
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
}
}
}
RESPONSE FROM ALEXA
--------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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I figured it out, I was using a LoggingInterceptor for OKHttp and it use to convert the bytes to string and log it and due to some reason, it is unable to recognize some characters and it gives some junk values for those characters and due to some reason, those values persisted back in the byte array also... which used to give malformed mp3 file. After removing the interceptor...it started working... so step 1 is done...more to go.