Android
As you can see that i am using Volley request but here i want to pass auth token through sharedPreferences but i dont know where to pass here i am sharing some text onclick of share button but that data changed after auth pass but i am unable to pass it
private fun getHomeCatgoryData(productListUrl: String?) {
val sharedPreference = this.getSharedPreferences("DEALSNCOUPONS", Context.MODE_PRIVATE)
Log.d("sharedtoken",sharedPreference.getString("token","").toString())
mRequestQueue = Volley.newRequestQueue(this,)
val req = JsonObjectRequest(
Request.Method.GET, productListUrl, null,
Response.Listener
{ response ->
try {
mHomeCatgoryData = gson.fromJson(response.toString(), HomeCatgoryData::class.java)
println(mHomeCatgoryData!!.homePrimaryList!!.size)
"Bearer ${sharedPreference?.getString("token", "")}"
catgoryItemAdapter = mHomeCatgoryData!!.homePrimaryList?.let {
HomeCatgoryItemAdapter(this ,
it
)
}
view_all_rc.adapter = catgoryItemAdapter
catgoryItemAdapter?.setOnItemClickListener(object : HomeCatgoryItemAdapter.OnItemClickListener {
override fun onItemClick(product: HomePrimaryList) {
//Toast.makeText(context , "gKDS" , Toast.LENGTH_SHORT).show()
startActivity(Intent(applicationContext , ProductDescriptionScreen::class.java).putExtra("product_details" , product))
}
})
catgoryItemAdapter?.setOnShareClickListener(object : HomeCatgoryItemAdapter.OnShareClickListener{
override fun onShareClick(shareText: String) {
// TODO("Not yet implemented")
// Toast.makeText(context , "gKDS" , Toast.LENGTH_SHORT).show()
share(shareText , this#ViewAllScreen)
}
})
} catch (e: JSONException) {
e.printStackTrace()
}
}
) { error -> VolleyLog.e("Error: ", error.message) }
mRequestQueue!!.add(req)
}``
Related
I have a retrofit API call but am having trouble getting the data out of it:
This is in a class file that's not a viewModel or Fragment. It's called from the apps main activity view model. I need to be able to get the data from the API and wait for some processing to be done on it before returning the value back the view model. Newer to kotlin and struggling with all the watchers and async functions. The result of this an empty string is the app crashes, because it's trying to access data before it has a value.
From class getData which is not a fragment
private lateinit var data: Data
fun sync(refresh: Boolean = false): List<String> {
var info = emptyList<String>
try {
getData(::processData, ::onFailure)
info = data.info
} catch(e: Throwable){
throw Exception("failed to get data")
}
}
}
return info
}
fun getData(
onSuccess: KFunction1<ApiResponse>?, Unit>,
onFailed: KFunction1<Throwable, Unit>
) {
val client = ApiClient().create(Service.RequestData)
val request = client.getData()
request.enqueue(object : Callback<ApiResponse> {
override fun onResponse(
call: Call<ApiResponse>,
response: Response<ApiResponse>
) {
onSuccess(response.body())
}
override fun onFailure(call: Call<RegistryResponse<GlobalLanguagePack>>, t: Throwable) {
onFailed(Exception("failed to get data"))
}
})
}
private fun processData(body: ApiResponse?) {
requireNotNull(body)
data = body.data
}
```
From appViewModel.kt:
```
fun setUpStuff(context: Context, resources: AppResources) = viewModelScope.launch {
val stuff = try {
getData.sync()
} catch (e: Exception) {
return#launch
}
if (stuff.isEmpty()) return#launch
}
```
I wrote an App, in Kotlin with Android Studio that write some strings to a file.
All work, I can write and read inside the App, but I can't see the file looking in Documents folder.
How can I use the folder Documents as a storage space?
Thank you
These are the function I use:
fun saveTextFile(view: View, nomeFile: String, testo: String, contesto: Context){
var fileStream: FileOutputStream
try {
fileStream = contesto.openFileOutput(nomeFile, MODE_APPEND) // OK esegue append
fileStream.write(testo.toByteArray())
fileStream.close()
}catch (e: Exception){
e.printStackTrace()
}
}
fun readTextFile(view: View, nomeFile: String, contesto: Context): String{
var fileInputStream: FileInputStream? = null
fileInputStream = contesto.openFileInput(nomeFile)
var inputStreamReader: InputStreamReader = InputStreamReader(fileInputStream)
val bufferedReader: BufferedReader = BufferedReader(inputStreamReader)
val stringBuilder: StringBuilder = StringBuilder()
var text: String? = null
while ({ text = bufferedReader.readLine(); text }() != null) {
stringBuilder.append(text)
}
inputStreamReader.close();
return(stringBuilder.toString())
}
Thank you, Livio
For writing in Documents folder of your device , you just need to make use of MediaStore for the same. You can take input for this function anything that you want like String , bitmap , PdfDocument and other's too .
For Your UseCase you can do the following ,
Global Variable :
private var imageUri: Uri? = null
override suspend fun saveDocument(context : Context, text : String) {
withContext(Dispatchers.IO) {
try {
val collection =
MediaStore.Files.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
val dirDest = File(
Environment.DIRECTORY_DOCUMENTS,
context.getString(R.string.app_name)
)
val date = System.currentTimeMillis()
val fileName = "$date.txt"
val contentValues = ContentValues().apply {
put(MediaStore.MediaColumns.DISPLAY_NAME, fileName)
put(MediaStore.MediaColumns.RELATIVE_PATH,
"$dirDest${File.separator}")
put(MediaStore.Files.FileColumns.IS_PENDING, 1)
}
}
val imageUri = context.contentResolver.insert(collection, contentValues)
withContext(Dispatchers.IO) {
imageUri?.let { uri ->
context.contentResolver.openOutputStream(uri, "w").use { out -> out?.write(text.toByteArray())
}
contentValues.clear()
contentValues.put(MediaStore.Files.FileColumns.IS_PENDING, 0)
context.contentResolver.update(uri, contentValues, null, null)
}
}
} catch (e: FileNotFoundException) {
null
}
}
}
For Updating the already existing file , do the following . After creating file for the first time I have saved the imageUri in a global variable (If you want to store it permanently / or for a while you can use Jetpack Datastore / Shared Preference to save the same ):
suspend fun updateData(context: Context,text : String){
withContext(Dispatchers.IO) {
try {
val collection =
MediaStore.Files.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
val dirDest = File(
Environment.DIRECTORY_DOCUMENTS,
context.getString(R.string.app_name)
)
val fileName = "test.txt"
val contentValues = ContentValues().apply {
put(MediaStore.MediaColumns.DISPLAY_NAME, fileName)
put(
MediaStore.MediaColumns.RELATIVE_PATH,
"$dirDest${File.separator}"
)
put(MediaStore.Files.FileColumns.IS_PENDING, 1)
}
withContext(Dispatchers.IO) {
imageUri?.let { uri ->
context.contentResolver.openOutputStream(uri, "wa").use { out ->
out?.write(text.toByteArray())
}
contentValues.clear()
contentValues.put(MediaStore.Files.FileColumns.IS_PENDING, 0)
context.contentResolver.update(uri, contentValues, null, null)
}
}
} catch (e: FileNotFoundException) {
null
}
}
}
For Reading the File , Do the following :
suspend fun read(context: Context, source: Uri): String = withContext(Dispatchers.IO) {
val resolver: ContentResolver = context.contentResolver
resolver.openInputStream(source)?.use { stream -> stream.readText() }
?: throw IllegalStateException("could not open $source")
}
private fun InputStream.readText(charset: Charset = Charsets.UTF_8): String =
readBytes().toString(charset)
This is how the final code looks like :
class MainActivity : AppCompatActivity() {
private lateinit var btn: Button
private var imageUri: Uri? = null
private lateinit var btn2: Button
private lateinit var btn3 : Button
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
btn = findViewById(R.id.btnAdd)
btn2 = findViewById(R.id.getText)
btn3 = findViewById(R.id.updateText)
btn.setOnClickListener {
lifecycleScope.launch {
saveDocument(applicationContext, "Original ")
}
}
btn3.setOnClickListener {
lifecycleScope.launch {
updateData(applicationContext,"Appended")
}
}
btn2.setOnClickListener {
lifecycleScope.launch {
imageUri?.let { it1 ->
val data = read(applicationContext, it1)
Toast.makeText(applicationContext, "The data is $data ", Toast.LENGTH_LONG)
.show()
}
}
}
}
suspend fun saveDocument(context: Context, text: String) {
withContext(Dispatchers.IO) {
try {
val collection =
MediaStore.Files.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
val dirDest = File(
Environment.DIRECTORY_DOCUMENTS,
context.getString(R.string.app_name)
)
val date = System.currentTimeMillis()
val fileName = "test.txt"
val contentValues = ContentValues().apply {
put(MediaStore.MediaColumns.DISPLAY_NAME, fileName)
put(
MediaStore.MediaColumns.RELATIVE_PATH,
"$dirDest${File.separator}"
)
put(MediaStore.Files.FileColumns.IS_PENDING, 1)
}
imageUri = context.contentResolver.insert(collection, contentValues)
withContext(Dispatchers.IO) {
imageUri?.let { uri ->
context.contentResolver.openOutputStream(uri, "w").use { out ->
out?.write(text.toByteArray())
}
contentValues.clear()
contentValues.put(MediaStore.Files.FileColumns.IS_PENDING, 0)
context.contentResolver.update(uri, contentValues, null, null)
}
}
} catch (e: FileNotFoundException) {
null
}
}
}
suspend fun updateData(context: Context, text: String) {
withContext(Dispatchers.IO) {
try {
val collection =
MediaStore.Files.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
val dirDest = File(
Environment.DIRECTORY_DOCUMENTS,
context.getString(R.string.app_name)
)
val fileName = "test.txt"
val contentValues = ContentValues().apply {
put(MediaStore.MediaColumns.DISPLAY_NAME, fileName)
put(
MediaStore.MediaColumns.RELATIVE_PATH,
"$dirDest${File.separator}"
)
put(MediaStore.Files.FileColumns.IS_PENDING, 1)
}
withContext(Dispatchers.IO) {
imageUri?.let { uri ->
context.contentResolver.openOutputStream(uri, "wa").use { out ->
out?.write(text.toByteArray())
}
contentValues.clear()
contentValues.put(MediaStore.Files.FileColumns.IS_PENDING, 0)
context.contentResolver.update(uri, contentValues, null, null)
}
}
} catch (e: FileNotFoundException) {
null
}
}
}
suspend fun read(context: Context, source: Uri): String = withContext(Dispatchers.IO) {
val resolver: ContentResolver = context.contentResolver
resolver.openInputStream(source)?.use { stream -> stream.readText() }
?: throw IllegalStateException("could not open $source")
}
private fun InputStream.readText(charset: Charset = Charsets.UTF_8): String =
readBytes().toString(charset)
I have three buttons . With the first I create a file , then the uri gets stored in the global variable . Then onClick of second button I add to the already existing file and then read the file using the third button using the same imageUri stored in the global variable
This is the demo for the same . Check when the buttons are being pressed and the output in the form of Toast at the bottom .
Does anyone have an idea how to convert these codes to ktor 2.0.
https://gist.github.com/togisoft/d1113a83eeb1d6b52031f77fe780ce48
If someone needs to see a complete sample of Aleksei's answer, I created a sample repository.
I did make some slight tweaks to the other answer as the implementation error was missing the correct messaging from the original gist.
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.auth.FirebaseToken
import io.ktor.http.auth.*
import io.ktor.server.application.*
import io.ktor.server.auth.*
import io.ktor.server.request.*
import io.ktor.server.response.*
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.withContext
class FirebaseAuthProvider(config: FirebaseConfig): AuthenticationProvider(config) {
val authHeader: (ApplicationCall) -> HttpAuthHeader? = config.authHeader
private val authFunction = config.firebaseAuthenticationFunction
override suspend fun onAuthenticate(context: AuthenticationContext) {
val token = authHeader(context.call)
if (token == null) {
context.challenge(FirebaseJWTAuthKey, AuthenticationFailedCause.InvalidCredentials) { challengeFunc, call ->
challengeFunc.complete()
call.respond(UnauthorizedResponse(HttpAuthHeader.bearerAuthChallenge(realm = FIREBASE_AUTH)))
}
return
}
try {
val principal = verifyFirebaseIdToken(context.call, token, authFunction)
if (principal != null) {
context.principal(principal)
}
} catch (cause: Throwable) {
val message = cause.message ?: cause.javaClass.simpleName
context.error(FirebaseJWTAuthKey, AuthenticationFailedCause.Error(message))
}
}
}
class FirebaseConfig(name: String?) : AuthenticationProvider.Config(name) {
internal var authHeader: (ApplicationCall) -> HttpAuthHeader? =
{ call -> call.request.parseAuthorizationHeaderOrNull() }
var firebaseAuthenticationFunction: AuthenticationFunction<FirebaseToken> = {
throw NotImplementedError(FirebaseImplementationError)
}
fun validate(validate: suspend ApplicationCall.(FirebaseToken) -> User?) {
firebaseAuthenticationFunction = validate
}
}
public fun AuthenticationConfig.firebase(name: String? = FIREBASE_AUTH, configure: FirebaseConfig.() -> Unit) {
val provider = FirebaseAuthProvider(FirebaseConfig(name).apply(configure))
register(provider)
}
suspend fun verifyFirebaseIdToken(
call: ApplicationCall,
authHeader: HttpAuthHeader,
tokenData: suspend ApplicationCall.(FirebaseToken) -> Principal?
): Principal? {
val token: FirebaseToken = try {
if (authHeader.authScheme == "Bearer" && authHeader is HttpAuthHeader.Single) {
withContext(Dispatchers.IO) {
FirebaseAuth.getInstance().verifyIdToken(authHeader.blob)
}
} else {
null
}
} catch (ex: Exception) {
ex.printStackTrace()
return null
} ?: return null
return tokenData(call, token)
}
private fun HttpAuthHeader.Companion.bearerAuthChallenge(realm: String): HttpAuthHeader {
return HttpAuthHeader.Parameterized("Bearer", mapOf(HttpAuthHeader.Parameters.Realm to realm))
}
private fun ApplicationRequest.parseAuthorizationHeaderOrNull() = try {
parseAuthorizationHeader()
} catch (ex: IllegalArgumentException) {
println("failed to parse token")
null
}
const val FIREBASE_AUTH = "FIREBASE_AUTH"
private const val FirebaseJWTAuthKey: String = "FirebaseAuth"
private const val FirebaseImplementationError =
"Firebase auth validate function is not specified, use firebase { validate { ... } }to fix"
Then to actually use in your project created an extension function on Application. Be sure that the Firebase Admin SDK has been initialized with credentials before installing the Firebase authentication plugin on Ktor.
fun Application.configureFirebaseAuth() {
FirebaseAdmin.init()
install(Authentication) {
firebase {
validate {
// TODO look up user profile to fill in any additional information on top of firebase user profile
User(it.uid, it.name)
}
}
}
}
Finally wrap a route with the authentication function:
authenticate(FIREBASE_AUTH) {
get("/authenticated") {
val user: User = call.principal() ?: return#get call.respond(HttpStatusCode.Unauthorized)
call.respond("User is authenticated: $user")
}
}
The converted to Ktor 2.0.* code is the following:
import io.ktor.http.auth.*
import io.ktor.serialization.*
import io.ktor.server.application.*
import io.ktor.server.auth.*
import io.ktor.server.request.*
import io.ktor.server.response.*
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.withContext
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.auth.FirebaseToken
class FirebaseAuthProvider(config: FirebaseConfig): AuthenticationProvider(config) {
val authHeader: (ApplicationCall) -> HttpAuthHeader? = config.authHeader
private val authFunction = config.firebaseAuthenticationFunction
override suspend fun onAuthenticate(context: AuthenticationContext) {
val token = authHeader(context.call)
if (token == null) {
context.challenge(FirebaseJWTAuthKey, AuthenticationFailedCause.InvalidCredentials) { challengeFunc, call ->
challengeFunc.complete()
call.respond(UnauthorizedResponse(HttpAuthHeader.bearerAuthChallenge(realm = "firebaseAuth")))
}
return
}
try {
val principal = verifyFirebaseIdToken(context.call, token, authFunction)
if (principal != null) {
context.principal(principal)
}
} catch (cause: Throwable) {
val message = cause.message ?: cause.javaClass.simpleName
context.error(FirebaseJWTAuthKey, AuthenticationFailedCause.Error(message))
}
}
}
class FirebaseConfig(name: String?) : AuthenticationProvider.Config(name) {
internal var authHeader: (ApplicationCall) -> HttpAuthHeader? =
{ call -> call.request.parseAuthorizationHeaderOrNull() }
var firebaseAuthenticationFunction: AuthenticationFunction<FirebaseToken> = {
throw NotImplementedError(FirebaseImplementationError)
}
fun validate(validate: suspend ApplicationCall.(FirebaseToken) -> User?) {
firebaseAuthenticationFunction = validate
}
}
public fun AuthenticationConfig.firebase(name: String? = "firebaseAuth", configure: FirebaseConfig.() -> Unit) {
val provider = FirebaseAuthProvider(FirebaseConfig(name).apply(configure))
register(provider)
}
suspend fun verifyFirebaseIdToken(
call: ApplicationCall,
authHeader: HttpAuthHeader,
tokenData: suspend ApplicationCall.(FirebaseToken) -> Principal?
): Principal? {
val token: FirebaseToken = try {
if (authHeader.authScheme == "Bearer" && authHeader is HttpAuthHeader.Single) {
withContext(Dispatchers.IO) {
FirebaseAuth.getInstance().verifyIdToken(authHeader.blob)
}
} else {
null
}
} catch (ex: Exception) {
ex.printStackTrace()
return null
} ?: return null
return tokenData(call, token)
}
private fun HttpAuthHeader.Companion.bearerAuthChallenge(realm: String): HttpAuthHeader {
return HttpAuthHeader.Parameterized("Bearer", mapOf(HttpAuthHeader.Parameters.Realm to realm))
}
private fun ApplicationRequest.parseAuthorizationHeaderOrNull() = try {
parseAuthorizationHeader()
} catch (ex: IllegalArgumentException) {
println("failed to parse token")
null
}
private const val FirebaseJWTAuthKey: String = "FirebaseAuth"
private const val FirebaseImplementationError =
"Firebase auth validate function is not specified, use firebase { { ... } }to fix"
I have the following problem that I am already working on for over 20 hours: I want to use an Event Channel to get a data stream from the Spotify SDK. On the native side, I can automatically display the status of a current song by subscribing to my PlayerState. My goal is to be able to access this data stream with my Flutter app. On the native side I can output the data flow without problems. But I also want to be able to access this data in my Flutter App. The problem is that I do not get the data from Kotlin to Dart. I can not execute the command mEventSink?.success(position) because the mEventSink is zero.
It would be really great if someone could help me with this problem.
//...
class Spotifysdk04Plugin(private var registrar: Registrar): MethodCallHandler, EventChannel.StreamHandler {
//...
private var mEventSink: EventChannel.EventSink? = null
companion object {
#JvmStatic
fun registerWith(registrar: Registrar) {
val channel = MethodChannel(registrar.messenger(), "spotifysdk")
channel.setMethodCallHandler(Spotifysdk04Plugin(registrar))
val eventChannel = EventChannel(registrar.messenger(), "timerStream")
eventChannel.setStreamHandler(Spotifysdk04Plugin(registrar))
}
}
override fun onMethodCall(call: MethodCall, result: Result) {
if (call.method == "loginAppRemote") {
//...
} else if(call.method == "initEventStream") {
try {
spotifyAppRemote!!.playerApi.subscribeToPlayerState()
.setEventCallback { playerState: PlayerState? ->
Log.d("test", "test24")
var position = playerState!!.playbackPosition.toDouble()
Log.d("playbackPosition1", position.toString())
if(mEventSink != null) {
Log.d("test", "test25")
mEventSink?.success(position)
} else {
Log.d("test", "mEventSink == null")
}
}
} catch (err:Throwable) {
Log.v("initEventStreamError",err.message.toString())
result.success(false)
}
} else {
result.notImplemented()
}
}
override fun onCancel(arguments: Any?) {
mEventSink = null
}
override fun onListen(arguments: Any?, eventSink: EventChannel.EventSink) {
mEventSink = eventSink
}
}
I found a solution:
override fun onListen(p0: Any?, p1: EventChannel.EventSink?) {
mEventSink = p1
Log.d("test", "test1")
if(spotifyAppRemote == null) {
Log.d("test", "test2")
}
val connectionParams = ConnectionParams.Builder(clientId)
.setRedirectUri(redirectUri)
.showAuthView(true)
.build()
SpotifyAppRemote.connect(registrar.context(), connectionParams, object : Connector.ConnectionListener {
override fun onConnected(appRemote: SpotifyAppRemote) {
spotifyAppRemote = appRemote
if(spotifyAppRemote != null) {
Log.d("test", "test3")
spotifyAppRemote!!.playerApi.subscribeToPlayerState()
.setEventCallback { playerState: PlayerState? ->
Log.d("test", "test24")
var position = playerState!!.playbackPosition.toDouble()
Log.d("playbackPosition1", position.toString())
if(mEventSink != null) {
Log.d("test", "test25")
mEventSink?.success(position)
} else {
Log.d("test", "mEventSink == null")
}
}
}
Log.d("Spotify App Remote Login", "Connected!")
}
override fun onFailure(throwable: Throwable) {
Log.e("Spotify App Remote Login", "Error!", throwable)
}
})
}
I am trying to work out what's wrong with this code ? I'm new to this. I'm having a response error,
val stringRequest = object : StringRequest(Request.Method.POST, EndPoints.URL_ADD_ARTIST,
Response.Listener<String> { response ->
try {
val obj = JSONObject(response)
Toast.makeText(applicationContext, obj.getString("message"), Toast.LENGTH_LONG).show()
} catch (e: JSONException) {
e.printStackTrace()
}
},
object : Response.ErrorListener {
override fun onErrorResponse(volleyError: VolleyError) {
Toast.makeText(applicationContext, volleyError.message, Toast.LENGTH_LONG).show()
}
}) {
#Throws(AuthFailureError::class)
override fun getParams(): Map<String, String> {
val params = HashMap<String, String>()
params.put("user", user)
params.put("password", password)
params.put("email", email)
return params
}
}
VolleySingleton.instance?.addToRequestQueue(stringRequest)
}
These lines are causing the error.
val stringRequest = object : StringRequest(Request.Method.POST, EndPoints.URL_ADD_ARTIST,
Response.Listener<String> { response ->
val obj = JSONObject(response)