Develop Reference

How to load audio file in ListView?

I need to load random audio files from storage, into my ListView, on a button click. But I don't understand how can I do this. When I call intent, file manager open to pick file. My song must have title, artist name and url. But after clicking it doesn't add. This is my code. Don't scold me for a possibly dull question. I'm new at android developing.
private fun loadSong() {
val intent: Intent = Intent(Intent.ACTION_OPEN_DOCUMENT).apply {
type = "audio/*"
action = Intent.ACTION_GET_CONTENT
}
startActivityForResult(Intent.createChooser(intent, "Select Audio"), PICK_AUDIO)
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if (requestCode == PICK_AUDIO && resultCode == RESULT_OK){
if (data != null) {
audioUri = data.data
}
}
adapter = SongsAdapter(listSongs)
twoTracksListView.adapter = adapter
}

uploading image from gallery and camera to server

I need to save the image that is taken from camera or image taken from gallery in kotlin. for now I've done this part and i'm finding other examples in kotlin but i'm unable to find. In other examples, images were send in multipart which was coded in java.
These are listeners
private val cameraRequest = 1888
private val pickImage = 100
private var imageUri: Uri? = null
takePhoto.setOnClickListener {
val cameraIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
startActivityForResult(cameraIntent, cameraRequest)
}
choosePicture.setOnClickListener {
val gallery = Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI)
startActivityForResult(gallery, pickImage)
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if (requestCode == cameraRequest) {
val photo: Bitmap = data?.extras?.get("data") as Bitmap
takePhoto.setImageBitmap(photo)
}
if (resultCode == RESULT_OK && requestCode == pickImage) {
imageUri = data?.data
if (imageUri != null) {
choosePicture.setImageURI(imageUri)
}
}
}

You can use this library for making a multipart request: https://github.com/gotev/android-upload-service
Also, it will handle app behaviour for you which includes upload-retry on slow internet connection and many more.

Android camera preview Image is rotated by 180 after opening the camera via Intent

I am using intents to launch the camera app on Android. The problem is on Samsung Note 9 I am seeing that the preview images is rotated upside down. However the bitmap obtained in onActivityResult is fine.
I want to fix the preview image screen using the Intent approach.
private fun dispatchTakePictureIntent() {
Intent(MediaStore.ACTION_IMAGE_CAPTURE).also { takePictureIntent ->
takePictureIntent.resolveActivity(packageManager)?.also {
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE)
}
}
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
val imageBitmap = data?.extras?.get("data") as Bitmap
ivTest.setImageBitmap(imageBitmap)
}
}

Sorry, but you have no means of controlling the preview behavior of a third-party camera app.

Edit image in Android

I'm want to do something like whatsapp, when user capture an image or select an image from gallery, they can edit the image/ draw something on the image.
Any help will be appreciated.

There are so many libraries for that.
Just try this Whatsapp like photo editor
Checkout the sample and library
ImageEditor.Builder(this, imagePath)
.setStickerAssets("stickers")
.disable(ImageEditor.EDITOR_TEXT) //to disable something
.open()
You will get the result in onActivityResult
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
when (requestCode) {
ImageEditor.RC_IMAGE_EDITOR ->
if (resultCode == Activity.RESULT_OK && data != null) {
val imagePath: String = data.getStringExtra(ImageEditor.EXTRA_EDITED_PATH)
edited_image.setImageBitmap(BitmapFactory.decodeFile(imagePath))
}
}
}

Passing extras with Intent.createChooser

I am using following code to select picture from gallery. I want to track the int value from this intent.
val intent = Intent()
intent.type = "image/*"
intent.action = Intent.ACTION_GET_CONTENT
intent.putExtra("Position", 1)
startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_PICTURE)
But I am getting only default value[0] when trying to get the passed value from intent in onActivityResult.
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
val selectedImageURI = data?.data
val position = data?.getIntExtra("Position", 0)
}
}
}
So my doubt is, is it possible to track the values through intent chooser? If yes, how?

you have to use requestCode in this line:
startActivityForResult(Intent.createChooser(intent, "Select Picture"), requestCode)
// for example use SELECT_PICTURE_POSITION_1 as requestCode
then you get it back here:
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if (resultCode == RESULT_OK) {
when (requestCode) {// use your request code here
SELECT_PICTURE_POSITION_0 -> {
val selectedImageURI = data?.data
val position = data?.getIntExtra("Position", 0)
}
SELECT_PICTURE_POSITION_1 -> {
val selectedImageURI = data?.data
val position = data?.getIntExtra("Position", 1)
}
SELECT_PICTURE_POSITION_2 -> {
val selectedImageURI = data?.data
val position = data?.getIntExtra("Position", 2)
}
//other conditions here
}
}
}
use multiple request codes for your needs.

is it possible to track the values through intent chooser?
No. Your problem has nothing to do with the chooser. You would have the same results with startActivityForResult(intent), SELECT_PICTURE).
There is no requirement for the activity being started by startActivityForResult() to return to you any extras that you happen to have put in that Intent.