Develop Reference

How to make a check for entering the correct city when entering

I have a way where when I enter the name of the city, I substitute the name of the city in the api, and everything works fine, but if I enter a non-real city, then nonsense is put in the api accordingly and the application crashes. I would like to make it so that if the city does not exist, that is, I output an error, then Toast "enter the correct name of the city" appears. Thank you in advance
Код:
const val USE_DEVICE_LOCATION = "USE_DEVICE_LOCATION"
const val CUSTOM_LOCATION = "CUSTOM_LOCATION"
class LocationProviderImpl(
private val fusedLocationProviderClient: FusedLocationProviderClient,
context: Context) : PreferenceProvider(context), LocationProvider {
private val appContext = context.applicationContext
override suspend fun hasLocationChanged(lastWeatherLocation: WeatherLocation): Boolean {
val deviceLocationChanged = try {
hasDeviceLocationChanged(lastWeatherLocation)
} catch (e: LocationPermissionNotGrantedException) {
false
}
return deviceLocationChanged || hasCustomLocationChanged(lastWeatherLocation)
}
override suspend fun getPreferredLocationString(): String {
if(isUsingDeviceLocation()) {
try {
val deviceLocation = getLastDeviceLocation()
?: return "${getCustomLocationName()}"
return "${deviceLocation.latitude},${deviceLocation.longitude}"
} catch (e: LocationPermissionNotGrantedException) {
return "${getCustomLocationName()}"
}
}
else {
return "${getCustomLocationName()}"
}
}
private suspend fun hasDeviceLocationChanged(lastWeatherLocation: WeatherLocation): Boolean {
if (!isUsingDeviceLocation())
return false
val deviceLocation = getLastDeviceLocation()
?: return false
// Comparing doubles cannot be done with "=="
val comparisonThreshold = 0.03
return Math.abs(deviceLocation.latitude - lastWeatherLocation.lat) > comparisonThreshold &&
Math.abs(deviceLocation.longitude - lastWeatherLocation.lon) > comparisonThreshold
}
private fun hasCustomLocationChanged(lastWeatherLocation: WeatherLocation): Boolean {
if (!isUsingDeviceLocation()) {
val customLocationName = getCustomLocationName()
return customLocationName != lastWeatherLocation.name
}
return false
}
private fun getCustomLocationName(): String? {
try {
return preferences.getString(CUSTOM_LOCATION, null)
}
catch (e: Exception) {
isUsingDeviceLocation()
}
throw LocationPermissionNotGrantedException()
}
private fun isUsingDeviceLocation(): Boolean {
return preferences.getBoolean(USE_DEVICE_LOCATION, true)
}
#SuppressLint("MissingPermission")
private suspend fun getLastDeviceLocation(): Location? {
return (if (hasLocationPermission())
fusedLocationProviderClient.lastLocation.asDeferred()
else {
throw LocationPermissionNotGrantedException()
}).await()
}
private fun hasLocationPermission(): Boolean {
return ContextCompat.checkSelfPermission(appContext,
android.Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED
}
}
CurrentWeatherFragment
class CurrentWeatherFragment : ScopedFragment(), KodeinAware, SharedPreferences.OnSharedPreferenceChangeListener {
override val kodein by closestKodein()
private val viewModelFactory: CurrentWeatherViewModelFactory by instance()
private lateinit var viewModel: CurrentWeatherViewModel
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
return inflater.inflate(R.layout.current_weather_fragment, container, false)
}
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
loadBannerAd()
viewModel = ViewModelProvider(this, viewModelFactory)
.get(CurrentWeatherViewModel::class.java)
bindUI()
applyDarkModeSetting()
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
}
private fun loadBannerAd() {
MobileAds.initialize(context) {}
mAdViewCurrent = adView
val adRequest = AdRequest.Builder().build()
mAdViewCurrent.loadAd(adRequest)
mAdViewCurrent.adListener = object: AdListener() {
override fun onAdLoaded() {
}
override fun onAdFailedToLoad(adError : LoadAdError) {
// Code to be executed when an ad request fails.
}
override fun onAdOpened() {
// Code to be executed when an ad opens an overlay that
// covers the screen.
}
override fun onAdClicked() {
// Code to be executed when the user clicks on an ad.
}
override fun onAdClosed() {
}
}
}
override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
if (key == "GENDER") {
val prefs = sharedPreferences?.getString(key, "1")
when(prefs?.toInt()) {
1->{
bindUI()
}
2->{
bindUIWomen()
}
}
}
applyDarkModeSetting()
}
override fun onDestroy() {
super.onDestroy()
context?.let {
PreferenceManager.getDefaultSharedPreferences(it)
.registerOnSharedPreferenceChangeListener(this)
}
}
private fun applyDarkModeSetting() {
val sharedPreferences = context?.let { PreferenceManager.getDefaultSharedPreferences(it) }
val settingValue = sharedPreferences?.getString("GENDER", null)?.toIntOrNull() ?: 1
val mode = when (settingValue) {
1 -> {bindUI()}
2 -> {bindUIWomen()}
else -> Toast.makeText(context, "Nothing", Toast.LENGTH_LONG).show()
}
}
private fun bindUI() = launch(Dispatchers.Main) {
val currentWeather = viewModel.weather.await()
val weatherLocation = viewModel.weatherLocation.await()
val CurrentWeatherEntries = viewModel.weather.await()
CurrentWeatherEntries.observe(viewLifecycleOwner, Observer { weatherAll ->
if (weatherAll == null){
return#Observer
}
recyclerViewClothes.apply {
layoutManager = LinearLayoutManager(activity)
adapter = ClothesAdapter(weatherAll)
}
})
weatherLocation.observe(viewLifecycleOwner, Observer { location ->
if (location == null) return#Observer
updateLocation(location.name)
updateCityName(location.name)
})
currentWeather.observe(viewLifecycleOwner, Observer {
if(it == null) return#Observer
group_loading.visibility = View.GONE
weatherAll.visibility = View.VISIBLE
updateDateToday()
//updateIsDay(it.isDay)
updateHumidity(it.humidity)
updateTemperature(it.temperature, it.feelsLikeTemperature)
updateCondition(it.conditionText)
updatePressure(it.pressure)
updateWind(it.windSpeed)
updateCloudy(it.cloud)
GlideApp.with(this#CurrentWeatherFragment)
.load("https:${it.conditionIconUrl}")
.into(imageView_condition_icon)
})
refreshApp()
}
private fun List<UnitSpecificCurrentWeatherEntry>.toCurrentWeatherItems() : List<ClothesAdapter> {
return this.map {
ClothesAdapter(it) //ClothesAdapter
}
}
// private fun List<UnitSpecificCurrentWeatherEntry>.toCurrentWeatherItems() : List<ClothesAdapterWomen> {
// return this.map {
// ClothesAdapterWomen(it) //ClothesAdapter
// }
// }
private fun chooseLocalizationUnitAbbreviation(metric: String, imperial: String): String {
return if(viewModel.isMetricUnit) metric else imperial
}
private fun updateLocation(location: String) {
(activity as? AppCompatActivity)?.supportActionBar?.subtitle = getString(R.string.todayTitle)
}
private fun updateDateToday() {
(activity as? AppCompatActivity)?.supportActionBar?.subtitle = getString(R.string.todayTitle)
}
private fun updateCityName(cityName: String) {
textView_cityName.text = cityName
}
}

Android - WorkManager - Result.success() called too many times

I'm stuck on a problem with my app.
I'm trying to upload some photos to a cloud and then, I'll show to the user a list of url to copy, in order to use them in a second time.
I'm using RxWorker for this.
When I enqueue my workers list, everything seems fine (one OneTimeWorkRequestBuilder for each image), but then, when I retrieve the result, seems that my observe is triggered too many times.
In order to make this step suspendable, I've two lists (image and worker ones).
When a work is finished (both failure or success) I cancel both image and worker from their own list.
Here's my code. Thanks to everyone!
My Fragment:
class ImagesUploadFragment : Fragment() {
companion object {
private const val TAG = "ImagesUploadFragment"
private const val PHOTOS_LIST = "PHOTOS_LIST"
private const val WORK_NAME = "PHOTO_UPLOAD"
fun newInstance(optionalData: String?): ImagesUploadFragment {
val imagesUploadFragment = ImagesUploadFragment()
val bundle = Bundle()
bundle.putString(PHOTOS_LIST, optionalData)
imagesUploadFragment.arguments = bundle
return imagesUploadFragment
}
}
private lateinit var imagesUploadBinding: FragmentImagesUploadBinding
private var stepListener: StepListener? = null
private val mDownloadUrlsList = mutableListOf<String>()
private val mWorkManger: WorkManager by lazy { WorkManager.getInstance(requireContext()) }
private val mWorkRequestList = mutableListOf<OneTimeWorkRequest>()
private var isUploadPaused = false
private val mImagesList = mutableListOf<String>()
private val gson: Gson by inject()
override fun onAttach(context: Context) {
super.onAttach(context)
stepListener = context as? StepListener
}
private val imagesUploadViewModel: ImagesUploadViewModel by viewModel()
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
imagesUploadBinding = FragmentImagesUploadBinding.inflate(inflater, container, false)
return imagesUploadBinding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val imagesList = arguments?.getString(PHOTOS_LIST)
imagesList?.let {
startImagesUpload(it)
}
imagesUploadBinding.successfullyUpdated.text = String.format(getString(R.string.succeeded_updates), 0)
imagesUploadBinding.workActionIv.setImageDrawable(ContextCompat.getDrawable(requireContext(), R.drawable.ic_pause))
imagesUploadBinding.buttonContinue.setOnClickListener {
stepListener?.onStepChange(4, gson.toJson(mDownloadUrlsList))
}
mWorkManger.cancelAllWorkByTag(TAG)
mWorkManger.cancelAllWork()
mWorkManger.pruneWork()
imagesUploadBinding.workActionIv.setOnClickListener {
if (!isUploadPaused) {
isUploadPaused = true
pauseUpload()
imagesUploadBinding.workActionIv.setImageDrawable(ContextCompat.getDrawable(requireContext(), R.drawable.ic_play))
} else {
isUploadPaused = false
resumeUpload()
imagesUploadBinding.workActionIv.setImageDrawable(ContextCompat.getDrawable(requireContext(), R.drawable.ic_pause))
}
}
setupWorkManagerObserve()
with(imagesUploadViewModel) {
observe(imagesListResource,
success = { imagesList ->
imagesUploadBinding.uploadProgress.max = imagesList.first.size
mImagesList.addAll(imagesList.first.map { it.jsonValue })
setupWorkerList()
},
failure = {
Timber.e(it)
}
)
observe(uploadedFileResource,
success = {
if(it.isNotEmpty()) mDownloadUrlsList.add(it)
imagesUploadBinding.buttonContinue.isVisible = mImagesList.size == 0
imagesUploadBinding.workActionIv.isVisible = mImagesList.size > 0
imagesUploadBinding.horizontalSpace.isVisible = mImagesList.size > 0
},
failure = {
Timber.e(it)
}
)
}
}
private fun pauseUpload() {
mWorkManger.cancelAllWork()
}
private fun resumeUpload() {
setupWorkerList()
}
private fun startImagesUpload(imagesListJson: String) {
imagesUploadViewModel.getImagesFromUri(imagesListJson)
}
private fun setupWorkManagerObserve() {
mWorkManger
.getWorkInfosByTagLiveData(TAG)
.observe(viewLifecycleOwner) {
var successNumber = 0
var failureNumber = 0
it.forEach { work ->
when {
work.state == WorkInfo.State.SUCCEEDED && work.state.isFinished -> {
successNumber++
val image = work.outputData.getString(PHOTO)
val uploadedFileJson = work.outputData.getString(UPLOAD_RESPONSE)
mWorkRequestList.removeAll { it.id == work.id }
mImagesList.removeAll { it == image }
uploadedFileJson?.let {
imagesUploadViewModel.getDownloadUrlFromResponse(it)
}
imagesUploadBinding.uploadProgress.progress = successNumber + failureNumber
imagesUploadBinding.successfullyUpdated.text =
String.format(getString(R.string.succeeded_updates), successNumber)
}
work.state == WorkInfo.State.RUNNING -> {
}
work.state == WorkInfo.State.FAILED -> {
failureNumber++
val image = work.outputData.getString(PHOTO)
mWorkRequestList.removeAll { it.id == work.id }
mImagesList.removeAll { it == image }
imagesUploadBinding.uploadProgress.progress = successNumber + failureNumber
imagesUploadBinding.failuredUpdated.text =
String.format(getString(R.string.failed_updates), failureNumber)
imagesUploadViewModel.addFailure()
}
else -> {
}
}
}
}
}
private fun setupWorkerList() {
for (i in 0 until mImagesList.size) {
val work = OneTimeWorkRequestBuilder<ImagesUploadWorkManager>()
.addTag(TAG)
.setInputData(Data.Builder().putString(PHOTO, mImagesList[i])
.build())
.build()
mWorkRequestList.add(work)
}
mWorkManger.enqueue(mWorkRequestList)
}
}
My worker:
class ImagesUploadWorkManager(val context: Context, parameters: WorkerParameters) : RxWorker(context, parameters) {
companion object {
const val PHOTO = "PHOTO"
const val UPLOAD_RESPONSE = "UPLOAD_RESPONSE"
}
private val uploadFilesUseCase: UploadFilesUseCase by inject(UploadFilesUseCase::class.java)
private val gson: Gson by inject(Gson::class.java)
override fun createWork(): Single<Result> {
val imageStringUri = inputData.getString(PHOTO)
val imageUri = Uri.parse(imageStringUri)
return Single.fromObservable(
uploadFilesUseCase.buildObservable(UploadFilesUseCase.Params(imageUri))
.doOnError {
Timber.e(it)
}
.map {
Result.success(workDataOf(UPLOAD_RESPONSE to gson.toJson(it), PHOTO to imageStringUri))
}
.onErrorReturn {
Timber.e(it)
Result.failure(workDataOf(PHOTO to imageStringUri))
}
)
}
}
My UseCase:
class UploadFilesUseCase(
private val context: Context,
private val getServerUseCase: GetServerUseCase,
) : UseCase<UploadFilesUseCase.Params, GoFileDataEntity>() {
private val goFileApi: GoFileApi by inject(GoFileApi::class.java)
override fun buildObservable(param: Params): Observable<GoFileDataEntity> {
return Observable.just(param.imageUri)
.flatMap {
val file = createTempFile(it) ?: throw Exception()
Observable.just(file)
}.flatMap { imageFile ->
getServerUseCase.buildObservable(GetServerUseCase.Params())
.flatMap { server ->
goFileApi.uploadFile(
String.format(BuildConfig.api_gofile_upload, server.server),
MultipartBody.Part.createFormData("file", imageFile.name, createUploadRequestBody(imageFile, "image/jpeg"))
).toObservable()
}.map { it.goFileDataDTO.toEntity() }
}
}
private fun createUploadRequestBody(file: File, mimeType: String) =
file.asRequestBody(mimeType.toMediaType())
private fun createTempFile(uri: Uri): File? {
val tempFile = File.createTempFile(System.currentTimeMillis().toString().take(4), ".jpg", context.externalCacheDir)
val inputStream = context.contentResolver.openInputStream(uri) ?: return null
FileOutputStream(tempFile, false).use { outputStream ->
var read: Int
val bytes = ByteArray(DEFAULT_BUFFER_SIZE)
while (inputStream.read(bytes).also { read = it } != -1) {
outputStream.write(bytes, 0, read)
}
outputStream.close()
}
inputStream.close()
return tempFile
}
data class Params(val imageUri: Uri)
}

I had a similar problem, and it looks like the queue was full from previous Workmanager enqueuings.
I did following during application start and now it works fine:
WorkManager.getInstance(mContext).cancelAllWork();

Exo player fast scroll playing video sound mixed

I am using exoplayer for playing videos .And for this we are used Fragment instance with pagerstateadapter and viewpager2.
But when scroll fast previous played video sound listen in background as well as in screen video means mix the sound in same video player.
Please help me how to solve this.
1.State adapter
class StoriesPagerAdapter(
fragment: Fragment,
val onClick1: VideoItemAdapter.OnItemClicked?,
val onlikeClick: VideoItemAdapter.OnLikeCLicked?,
val onFollowClick: VideoItemAdapter.OnFollowCLicked?,
val ontrendingClick: VideoItemAdapter.OnTrendCLicked?,
val oniconCLick: VideoItemAdapter.OnIconClick?) : FragmentStateAdapter(fragment) {
val dataList:MutableList<Gettrendingvideos.Data.Postlist>=mutableListOf()
override fun getItemCount(): Int {
return dataList.size
}
fun addAll(movies: MutableList<Gettrendingvideos.Data.Postlist>) {
for (movie in movies) {
add(movie)
}
}
fun add(moive: Gettrendingvideos.Data.Postlist) {
dataList.add(moive)
notifyItemInserted(dataList.size - 1)
}
override fun createFragment(position: Int): Fragment {
return StoryViewFragment.newInstance(
onClick1,
onlikeClick,
onFollowClick,
ontrendingClick,
oniconCLick,
dataList[position]
)
}}
2 Fragment
class StoryViewFragment : Fragment(), CommentFragment.onCommentCountIncrease {
private var storyUrl: String? = null
private var storiesDataModel: Gettrendingvideos.Data.Postlist? = null
lateinit var mView: View
private var simplePlayer: SimpleExoPlayer? = null
private var cacheDataSourceFactory: CacheDataSourceFactory? = null
private val simpleCache = MainApplication.simpleCache
private var toPlayVideoPosition: Int = -1
lateinit var viewModel: MainViewModel
lateinit var preferences: SecurePreferences
private var bool: Boolean? = false
var onItemClick: VideoItemAdapter.OnItemClicked? = null
var onlikeCLicked: VideoItemAdapter.OnLikeCLicked? = null
var onFollowCLicked: VideoItemAdapter.OnFollowCLicked? = null
var onTrendCLicked: VideoItemAdapter.OnTrendCLicked? = null
var onIconClick: VideoItemAdapter.OnIconClick? = null
lateinit var huserId: String
lateinit var token: String
companion object {
fun newInstance(
itemClicked: VideoItemAdapter.OnItemClicked?,
likeCLicked: VideoItemAdapter.OnLikeCLicked?,
onFollowCLicked: VideoItemAdapter.OnFollowCLicked?,
onTrendCLicked: VideoItemAdapter.OnTrendCLicked?,
onIconClick: VideoItemAdapter.OnIconClick?,
storiesDataModel: Gettrendingvideos.Data.Postlist
) = StoryViewFragment()
.apply {
arguments = Bundle().apply {
putParcelable(Constants.KEY_STORY_DATA, storiesDataModel)
}
this.onItemClick = itemClicked
this.onlikeCLicked = likeCLicked
this.onFollowCLicked = onFollowCLicked
this.onTrendCLicked = onTrendCLicked
this.onIconClick = onIconClick
}
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View {
// Inflate the layout for this fragment
mView = inflater.inflate(
R.layout.layout_main,
container,
false
)
return mView
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
viewModel = ViewModelProviders.of(this, ViewModelFactory(RetrofitBuilder.apiService))
.get(MainViewModel::class.java)
preferences =
SecurePreferences(
requireActivity(),
AppConstants.preferenceName,
AppConstants.USER_DETAILS,
true
)
storiesDataModel = arguments?.getParcelable(Constants.KEY_STORY_DATA)
setData()
}
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
if (!preferences.getString(AppConstants.USER_ID).equals(null)) {
huserId = preferences.getString(AppConstants.USER_ID)!!
Log.d("TAG", "onActivityCreated: $huserId")
}
}
#SuppressLint("SetTextI18n")
private fun setData() {
Log.d("TAG", "setData: $storiesDataModel")
mView.textview2.text = storiesDataModel?.user_name
mView.like_count.text = storiesDataModel?.total_likes.toString()
comment_count.text = storiesDataModel?.total_comments.toString()
mView.textview.text = storiesDataModel?.type
Glide.with(this).load(storiesDataModel?.user_profile_pic).placeholder(R.drawable.profile).into(mView.image)
if (storiesDataModel?.is_like == 0) {
mView.imageView4.setImageResource(R.drawable.ic_like)
} else {
mView.imageView4.setImageResource(R.drawable.ic_like_red)
}
if (storiesDataModel?.is_following!! == 0) {
mView.textview3.text = "Follow"
} else {
mView.textview3.text = "Following"
}
if (storiesDataModel?.user_id.toString()==preferences.getString(AppConstants.USER_ID)) {
mView.textview3.visibility = View.GONE
}
image.setOnClickListener {
if (preferences.getString(AppConstants.token).equals(null)) {
MainActivity().show(childFragmentManager, "")
} else {
preferences.put(
AppConstants.OtherProfile_UserId,
storiesDataModel?.user_id.toString()
)
}
}
val simplePlayer = getPlayer()
player_view_story.player = simplePlayer player_view_story.setResizeMode(AspectRatioFrameLayout.RESIZE_MODE_FILL)
simplePlayer?.setVideoScalingMode(C.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING)
storyUrl = storiesDataModel?.video_url
prepareMedia(storiesDataModel)
}
override fun onPause() {
pauseVideo()
super.onPause()
}
override fun onResume() {
restartVideo()
super.onResume()
}
override fun onDestroy() {
releasePlayer()
super.onDestroy()
}
private fun pausePlayer() {
simplePlayer?.setPlayWhenReady(false)
simplePlayer?.getPlaybackState()
}
private fun startPlayer() {
simplePlayer?.setPlayWhenReady(true)
simplePlayer?.getPlaybackState()
}
private val playerCallback: Player.EventListener? = object : Player.EventListener {
override fun onPlayerStateChanged(playWhenReady: Boolean, playbackState: Int) {
}
override fun onPlayerError(error: com.google.android.exoplayer2.ExoPlaybackException?) {
super.onPlayerError(error)
}
}
private fun prepareVideoPlayer() {
simplePlayer = ExoPlayerFactory.newSimpleInstance(context)
cacheDataSourceFactory = CacheDataSourceFactory(
simpleCache,
DefaultHttpDataSourceFactory(
Util.getUserAgent(
context,
"exo"
)
)
)
}
private fun getPlayer(): SimpleExoPlayer? {
if (simplePlayer == null) {
prepareVideoPlayer()
}
return simplePlayer
}
private fun prepareMedia(datamodel: Gettrendingvideos.Data.Postlist?{
val uri = Uri.parse(datamodel?.video_url)
simplePlayer.repeatMode = Player.REPEAT_MODE_ONE
simplePlayer.playWhenReady = true
if (storiesDataModel!!.type == "following") {
following_page.typeface = Typeface.DEFAULT_BOLD
trending_page.setTypeface(null, Typeface.NORMAL)
} else {
following_page.setTypeface(null, Typeface.BOLD)
}
if (storiesDataModel.type == "treading") {
trending_page.typeface = Typeface.DEFAULT_BOLD
following_page.setTypeface(null, Typeface.NORMAL)
} else {
trending_page.setTypeface(null, Typeface.BOLD)
}
if (simplePlayer.playWhenReady == true) {
}
simplePlayer.addListener(playerCallback)
toPlayVideoPosition = -1
}
private fun setArtwork(drawable: Drawable, playerView: PlayerView) {
playerView.useArtwork = true
playerView.defaultArtwork = drawable
}
private fun playVideo() {
simplePlayer.playWhenReady = true
}
private fun restartVideo() {
if (simplePlayer == null) {
prepareMedia(storiesDataModel)
} else {
simplePlayer.seekToDefaultPosition()
simplePlayer.playWhenReady = true
}
}
private fun pauseVideo() {
simplePlayer.playWhenReady = false
}
private fun releasePlayer() {
simplePlayer.stop(true)
simplePlayer.release()
}}

override fun setMenuVisibility(menuVisible: Boolean) {
if (!menuVisible){
simplePlayer?.playWhenReady = false
simplePlayer?.pause()
}
super.setMenuVisibility(menuVisible)
}
JUST ADD THIS IN YOUR StoryViewFragment.

Blank screen with RecyclerView No adapter attached

I'm tying to parse JSON in recyclerview. App compiles fine but it's outputting empty/blank screen
BlogAdapter.kt
class BlogAdapter(private val blogList: List<Blog>) : RecyclerView.Adapter<BlogAdapter.ViewHolder>() {
override fun getItemCount()= blogList.size
private var mContext: Context? = null
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
this.mContext=parent.context;
return ViewHolder(
LayoutInflater.from(parent.context).inflate(
R.layout.character_item,
parent,
false
)
)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
val mBlog = this.blogList[position]
if (mBlog.img != null) {
Glide.with(mContext!!)
.load(mBlog.img)
.into(holder.ivThumbnail)
}
if (mBlog.name != null) {
holder.tvTitle.text = mBlog.name
println("Log: Kabe "+mBlog.name)
}
}
class ViewHolder(itemView:View):RecyclerView.ViewHolder(itemView){
val ivThumbnail:ImageView = itemView.findViewById(R.id.ivThumbnail);
val tvTitle:TextView = itemView.findViewById(R.id.tvTitle);
}
}
MainActivity.kt
class MainActivity : AppCompatActivity() {
var mainViewModel: MainViewModel? = null
var mBlogAdapter: BlogAdapter? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
mainViewModel = ViewModelProvider(this).get(MainViewModel::class.java)
getPopularBlog()
swipe_refresh.setOnRefreshListener { getPopularBlog() }
}
private fun getPopularBlog() {
swipe_refresh.isRefreshing = false
mainViewModel!!.allBlog.observe(this, Observer { charactersList ->
prepareRecyclerView(charactersList)
})
}
private fun prepareRecyclerView(blogList: List<Blog>) {
mBlogAdapter = BlogAdapter(blogList)
if (this.resources.configuration.orientation == Configuration.ORIENTATION_PORTRAIT) {
blogRecyclerView.layoutManager = LinearLayoutManager(this)
} else {
blogRecyclerView.layoutManager = GridLayoutManager(this, 4)
}
blogRecyclerView.itemAnimator = DefaultItemAnimator()
blogRecyclerView.adapter = mBlogAdapter
}
}
My Json file looks like this:
[
{
"id": 1,
"name": "potter",
"img": "https://images.example.com/potter.jpg"
},
{ …}
]
I've created it based on this tutorial: https://itnext.io/kotlin-wrapping-your-head-around-livedata-mutablelivedata-coroutine-networking-and-viewmodel-b552c3a74eec
Any suggestions please
EDIT:
class BlogRepository() {
private var character = mutableListOf<ABCCharacters>()
private var mutableLiveData = MutableLiveData<List<ABCCharacters>>()
val completableJob = Job()
private val coroutineScope = CoroutineScope(Dispatchers.IO + completableJob)
private val thisApiCorService by lazy {
RestApiService.createCorService()
}
fun getMutableLiveData():MutableLiveData<List<ABCCharacters>> {
coroutineScope.launch {
val request = thisApiCorService.getPopularBlog()
withContext(Dispatchers.Main) {
try {
val response = request.await()
val mBlogWrapper = response;
if (/*mBlogWrapper != null &&*/ mBlogWrapper.isNotEmpty()) {
character = mBlogWrapper as MutableList<ABCCharacters>
mutableLiveData.value = character
}
} catch (e: HttpException) {
// Log exception //
} catch (e: Throwable) {
// Log error //)
}
}
}
return mutableLiveData;
}
}

You forget to call notifyDataSetChanged, when you setup your RecyclerView widget. Below the full method call, to make it works.
private fun prepareRecyclerView(blogList: List<Blog>) {
mBlogAdapter = BlogAdapter(blogList)
if (this.resources.configuration.orientation == Configuration.ORIENTATION_PORTRAIT) {
blogRecyclerView.layoutManager = LinearLayoutManager(this)
} else {
blogRecyclerView.layoutManager = GridLayoutManager(this, 4)
}
blogRecyclerView.itemAnimator = DefaultItemAnimator()
blogRecyclerView.adapter = mBlogAdapter
mBlogAdapter.notifyDataSetChanged()
}

Try using below implementation:
class MainActivity : AppCompatActivity() {
lateinit var mainViewModel: MainViewModel
var mBlogAdapter: BlogAdapter? = null
var blogList: List<Blog> = arrayListOf()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
mainViewModel = ViewModelProvider(this).get(MainViewModel::class.java)
// init your RV here
prepareRecyclerView()
getPopularBlog()
swipe_refresh.setOnRefreshListener { mainViewModel.getAllBlog() }
}
private fun getPopularBlog() {
swipe_refresh.isRefreshing = false
mainViewModel.getAllBlog().observe(this, Observer { charactersList ->
blogList = charactersList
mBlogAdapter?.notifyDataSetChanged()
})
}
private fun prepareRecyclerView() {
mBlogAdapter = BlogAdapter(blogList)
if (this.resources.configuration.orientation == Configuration.ORIENTATION_PORTRAIT) {
blogRecyclerView.layoutManager = LinearLayoutManager(this)
} else {
blogRecyclerView.layoutManager = GridLayoutManager(this, 4)
}
blogRecyclerView.itemAnimator = DefaultItemAnimator()
blogRecyclerView.adapter = mBlogAdapter
}
}
Modify your view model like below:
class MainViewModel() : ViewModel() {
val characterRepository= BlogRepository()
fun getAllBlog(): MutableLiveData<List<ABCCharacters>> {
return characterRepository.getMutableLiveData()
}
override fun onCleared() {
super.onCleared()
characterRepository.completableJob.cancel()
}
}

ViewPager with FragmentStatePagerAdapter scrolls before closing

I have a ViewPager with a FragmentStatePagerAdapter to let users scroll through videos using a VideoView. It works fine, but when you press the back button, the viewpager scrolls to the left and briefly shows the previous ViewView before closing the viewpager activity.
I understand the FragmentStatePagerAdapter will cache the fragments/views for better memory management, but it seems odd to show the precious view before closing. Is this normal, or is there any way to make sure a view is completely hidden when it's not the current pager in focus?
Here's the code for my Adapter. Basically I return one of two fragments that creates a view with that photo or video in it.
inner class MyAdapter(fm: FragmentManager) : FragmentStatePagerAdapter(fm) {
override fun getCount(): Int = photoInfo.size
override fun getItemPosition(`object`: Any?): Int = super.getItemPosition(`object`)
override fun getItem(position: Int): Fragment {
when (photoInfo[position].type) {
PHOTO -> {
return PhotoFragment.newInstance(photoInfo[position])
}
VIDEO-> {
return VideoFragment.newInstance(photoInfo[position])
}
else -> {
return PhotoFragment.newInstance(photoInfo[position])
}
}
}
}
And the videofragment:
class VideoFragment : Fragment(), AnkoLogger {
internal var photo: String? = null
internal var totalSize: Int? = null
internal var thumbnail: String? = null
var player: SimpleExoPlayer? = null
var simpleExoPlayerView: SimpleExoPlayerView? = null
var error = false
var shouldLoop = true
var autoPlay = true
var proxy: HttpProxyCacheServer? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
photo = arguments.getString("photo")
thumbnail = arguments.getString("thumbnail")
totalSize = arguments.getInt("size")
shouldLoop = defaultSharedPreferences.getBoolean("loop_webm_preference", true)
autoPlay = defaultSharedPreferences.getBoolean("autplay_webm_preference", true)
proxy = getProxy(activity)
}
override fun onDestroyView() {
player?.release()
super.onDestroyView()
}
override fun onPause() {
super.onPause()
}
fun checkAndSetVolume() {
val isMuted = defaultSharedPreferences.getBoolean("mute_video", false)
when (isMuted) {
true -> {
simpleExoPlayerView?.findViewById<ImageButton>(R.id.exo_mute)?.imageResource = R.drawable.volume_on
player?.volume = 0f
}
false -> {
simpleExoPlayerView?.findViewById<ImageButton>(R.id.exo_mute)?.imageResource = R.drawable.volume_off
player?.volume = 1f
}
}
}
override fun getUserVisibleHint(): Boolean {
return super.getUserVisibleHint()
}
override fun setUserVisibleHint(isVisibleToUser: Boolean) {
super.setUserVisibleHint(isVisibleToUser)
if (!isVisibleToUser) {
player?.playWhenReady = false
player?.playbackState
player?.seekTo(0)
} else if (isVisible && isVisibleToUser && (proxy?.isCached(photo) == true) && !error) {
checkAndStartAutoplay()
}
}
fun checkAndStartAutoplay() {
checkAndSetVolume()
player?.playWhenReady = autoPlay
player?.playbackState
}
override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?,
savedInstanceState: Bundle?): View? {
simpleExoPlayerView = SimpleExoPlayerView(context)
val mainHandler = Handler()
val bandwidthMeter = DefaultBandwidthMeter()
val videoTrackSelectionFactory = AdaptiveTrackSelection.Factory(bandwidthMeter)
val trackSelector = DefaultTrackSelector(videoTrackSelectionFactory)
player = ExoPlayerFactory.newSimpleInstance(context, trackSelector)
val fl = FrameLayout(context)
simpleExoPlayerView?.player = player
simpleExoPlayerView?.setShutterBackgroundColor(Color.TRANSPARENT)
player?.repeatMode = if (shouldLoop) 1 else 0
player?.addListener(object : Player.DefaultEventListener() {
override fun onPlayerError(error: ExoPlaybackException?) {
val tv = TextView(context)
tv.text = getString(android.R.string.VideoView_error_text_unknown)
tv.textColor = Color.WHITE
tv.textAlignment = TextView.TEXT_ALIGNMENT_CENTER
fl.addView(tv, FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, Gravity.CENTER))
this#VideoFragment.error = true
}
override fun onLoadingChanged(isLoading: Boolean) {
super.onLoadingChanged(isLoading)
if (!isLoading) {
if (this#VideoFragment.isVisible && this#VideoFragment.userVisibleHint) {
checkAndStartAutoplay()
}
}
}
})
val proxyUrl = proxy?.getProxyUrl(photo)
val dataSourceFactory = DefaultDataSourceFactory(context, Util.getUserAgent(context, "Omnichan"), bandwidthMeter)
val videoSource = ExtractorMediaSource.Factory(dataSourceFactory).createMediaSource(Uri.parse(proxyUrl))
player?.prepare(videoSource)
fl.addView(simpleExoPlayerView, FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT, Gravity.CENTER))
simpleExoPlayerView?.findViewById<ImageButton>(R.id.exo_mute)?.setOnClickListener {
val isMuted = defaultSharedPreferences.getBoolean("mute_video", false)
defaultSharedPreferences.edit().putBoolean("mute_video", !isMuted).apply()
checkAndSetVolume()
}
return fl
}
companion object {
internal fun newInstance(photoInfo: PhotoInfo): VideoFragment {
val f = VideoFragment()
val args = Bundle()
args.putString("photo", photoInfo.photoUrl)
args.putString("thumbnail", photoInfo.thumbnailUrl)
f.arguments = args
return f
}
private var sharedProxy: HttpProxyCacheServer? = null
private fun newProxy(context: Context): HttpProxyCacheServer {
return HttpProxyCacheServer.Builder(context)
.maxCacheSize((1024 * 1024 * 256).toLong()) // 256 Mb for cache
.build()
}
fun getProxy(context: Context): HttpProxyCacheServer {
return sharedProxy ?: newProxy(context)
}
}
}