bitmap from image link
To retrieve a bitmap from an image link using Kotlin, you can follow these steps:
Create a function to download the image from the provided link. You can use the
URL
class to create a URL object with the image link, and then use theopenStream()
method to get the input stream of the image. Next, create aBufferedInputStream
object to read the input stream, and aByteArrayOutputStream
object to write the image data.Read the image data from the input stream using a buffer. You can create a byte array with a fixed size, and then use a while loop to read the data from the input stream into the buffer. Inside the loop, write the buffer data to the
ByteArrayOutputStream
object.Convert the byte array to a
Bitmap
object. Once you have the byte array with the image data, you can use theBitmapFactory
class to decode the byte array and create aBitmap
object. Use thedecodeByteArray()
method, passing in the byte array, the starting offset, and the length of the data.
Here's an example implementation in Kotlin:
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import java.io.BufferedInputStream
import java.io.ByteArrayOutputStream
import java.net.URL
fun fetchBitmapFromImageLink(imageLink: String): Bitmap {
val url = URL(imageLink)
val connection = url.openConnection()
connection.doInput = true
connection.connect()
val inputStream = connection.getInputStream()
val bufferedInputStream = BufferedInputStream(inputStream)
val outputStream = ByteArrayOutputStream()
val buffer = ByteArray(1024)
var bytesRead: Int
while (bufferedInputStream.read(buffer).also { bytesRead = it } != -1) {
outputStream.write(buffer, 0, bytesRead)
}
val bitmapData = outputStream.toByteArray()
return BitmapFactory.decodeByteArray(bitmapData, 0, bitmapData.size)
}
This function retrieves a bitmap from the provided image link by downloading the image, converting it to a byte array, and then decoding the byte array to create a Bitmap
object.