Skip to main content

How to upload a file using Fast Networking Library in Kotlin Android

How to upload a file using Fast Networking Library in Kotlin Android.

Here's a step-by-step tutorial on how to upload a file using the Fast Networking Library in Kotlin for Android.

Step 1: Add the Fast Networking Library dependency​

Add the following dependency to your app-level build.gradle file:

implementation 'com.amitshekhar.android:android-networking:1.0.2'

Step 2: Request permissions for file upload​

To upload a file, you need to request the necessary permissions from the user. Add the following code to your activity or fragment to request the required permissions:

val permission = Manifest.permission.READ_EXTERNAL_STORAGE
val requestCode = 123

if (ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this, arrayOf(permission), requestCode)
}

Step 3: Create a file chooser intent​

To allow the user to select a file to upload, you need to create a file chooser intent. Add the following code to your activity or fragment:

val intent = Intent(Intent.ACTION_GET_CONTENT)
intent.type = "*/*"
intent.addCategory(Intent.CATEGORY_OPENABLE)
startActivityForResult(intent, requestCode)

Step 4: Handle the file chooser result​

Override the onActivityResult method in your activity or fragment to handle the file chooser result. Add the following code:

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)
    
    if (requestCode == requestCode && resultCode == RESULT_OK) {
        val uri = data?.data
        val file = File(uri.path)
        
        // Call the uploadFile function with the file parameter
        uploadFile(file)
    }
}

Step 5: Upload the file using Fast Networking Library​

Create a new function called uploadFile to handle the file upload using the Fast Networking Library. Add the following code:

import com.androidnetworking.AndroidNetworking
import com.androidnetworking.common.Priority
import com.androidnetworking.interfaces.UploadProgressListener

fun uploadFile(file: File) {
    val url = "http://example.com/upload" // Replace with your upload URL
    
    AndroidNetworking.upload(url)
        .addMultipartFile("file", file)
        .setPriority(Priority.HIGH)
        .build()
        .setUploadProgressListener(object : UploadProgressListener {
            override fun onProgress(bytesUploaded: Long, totalBytes: Long) {
                // Handle upload progress here if needed
            }
        })
        .getAsJSONObject(object : JSONObjectRequestListener {
            override fun onResponse(response: JSONObject?) {
                // Handle successful upload response here
            }
            
            override fun onError(anError: ANError?) {
                // Handle upload error here
            }
        })
}

Step 6: Handle permissions and error cases​

Override the onRequestPermissionsResult method in your activity or fragment to handle the permissions result. Add the following code:

override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults)
    
    if (requestCode == requestCode) {
        if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            // Permission granted, proceed with file upload
        } else {
            // Permission denied, handle accordingly
        }
    }
}

That's it! You have now successfully implemented file upload using the Fast Networking Library in Kotlin for Android. Remember to replace the upload URL in the uploadFile function with your own server URL.