Kotlin code to get real path / sd card path from intent data while browsing file.

RealPathUtil.kt

import android.annotation.SuppressLint
import android.content.ContentUris
import android.content.Context
import android.content.CursorLoader
import android.database.Cursor
import android.net.Uri
import android.os.Build
import android.os.Environment
import android.provider.DocumentsContract
import android.provider.MediaStore
import android.text.TextUtils

object RealPathUtil {

    fun getRealPath(context: Context, fileUri: Uri): String? {
        // SDK >= 11 && SDK < 19
        return if (Build.VERSION.SDK_INT < 19) {
            getRealPathFromURIAPI11to18(context, fileUri)
        } else {
            getRealPathFromURIAPI19(context, fileUri)
        }// SDK > 19 (Android 4.4) and up
    }

    @SuppressLint("NewApi")
    fun getRealPathFromURIAPI11to18(context: Context, contentUri: Uri): String? {
        val proj = arrayOf(MediaStore.Images.Media.DATA)
        var result: String? = null

        val cursorLoader = CursorLoader(context, contentUri, proj, null, null, null)
        val cursor = cursorLoader.loadInBackground()

        if (cursor != null) {
            val columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA)
            cursor.moveToFirst()
            result = cursor.getString(columnIndex)
            cursor.close()
        }
        return result
    }

    /**
     * Get a file path from a Uri. This will get the the path for Storage Access
     * Framework Documents, as well as the _data field for the MediaStore and
     * other file-based ContentProviders.
     *
     * @param context The context.
     * @param uri     The Uri to query.
     * @author Niks
     */
    @SuppressLint("NewApi")
    fun getRealPathFromURIAPI19(context: Context, uri: Uri): String? {

        val isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT

        // DocumentProvider
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                val docId = DocumentsContract.getDocumentId(uri)
                val split = docId.split(":".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()
                val type = split[0]

                if ("primary".equals(type, ignoreCase = true)) {
                    return Environment.getExternalStorageDirectory().toString() + "/" + split[1]
                }
            } else if (isDownloadsDocument(uri)) {
                var cursor: Cursor? = null
                try {
                    cursor = context.contentResolver.query(uri, arrayOf(MediaStore.MediaColumns.DISPLAY_NAME), null, null, null)
                    cursor!!.moveToNext()
                    val fileName = cursor.getString(0)
                    val path = Environment.getExternalStorageDirectory().toString() + "/Download/" + fileName
                    if (!TextUtils.isEmpty(path)) {
                        return path
                    }
                } finally {
                    cursor?.close()
                }
                val id = DocumentsContract.getDocumentId(uri)
                if (id.startsWith("raw:")) {
                    return id.replaceFirst("raw:".toRegex(), "")
                }
                val contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads"), java.lang.Long.valueOf(id))

                return getDataColumn(context, contentUri, null, null)
            } else if (isMediaDocument(uri)) {
                val docId = DocumentsContract.getDocumentId(uri)
                val split = docId.split(":".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()
                val type = split[0]

                var contentUri: Uri? = null
                when (type) {
                    "image" -> contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI
                    "video" -> contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI
                    "audio" -> contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
                }

                val selection = "_id=?"
                val selectionArgs = arrayOf(split[1])

                return getDataColumn(context, contentUri, selection, selectionArgs)
            }// MediaProvider
            // DownloadsProvider
        } else if ("content".equals(uri.scheme!!, ignoreCase = true)) {

            // Return the remote address
            return if (isGooglePhotosUri(uri)) uri.lastPathSegment else getDataColumn(context, uri, null, null)
        } else if ("file".equals(uri.scheme!!, ignoreCase = true)) {
            return uri.path
        }// File
        // MediaStore (and general)

        return null
    }

    /**
     * Get the value of the data column for this Uri. This is useful for
     * MediaStore Uris, and other file-based ContentProviders.
     *
     * @param context       The context.
     * @param uri           The Uri to query.
     * @param selection     (Optional) Filter used in the query.
     * @param selectionArgs (Optional) Selection arguments used in the query.
     * @return The value of the _data column, which is typically a file path.
     * @author Niks
     */
    private fun getDataColumn(context: Context, uri: Uri?, selection: String?,
        selectionArgs: Array<String>?): String? {

        var cursor: Cursor? = null
        val column = "_data"
        val projection = arrayOf(column)

        try {
            cursor = context.contentResolver.query(uri!!, projection, selection, selectionArgs, null)
            if (cursor != null && cursor.moveToFirst()) {
                val index = cursor.getColumnIndexOrThrow(column)
                return cursor.getString(index)
            }
        } finally {
            cursor?.close()
        }
        return null
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is ExternalStorageProvider.
     */
    private fun isExternalStorageDocument(uri: Uri): Boolean {
        return "com.android.externalstorage.documents" == uri.authority
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     */
    private fun isDownloadsDocument(uri: Uri): Boolean {
        return "com.android.providers.downloads.documents" == uri.authority
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     */
    private fun isMediaDocument(uri: Uri): Boolean {
        return "com.android.providers.media.documents" == uri.authority
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is Google Photos.
     */
    private fun isGooglePhotosUri(uri: Uri): Boolean {
        return "com.google.android.apps.photos.content" == uri.authority
    }
}

RealPathUtilExts.kt

// Extension on intent

fun Intent?.getFilePath(context: Context): String {
    return this?.data?.let { data -> RealPathUtil.getRealPath(context, data) ?: "" } ?: ""
}

fun Uri?.getFilePath(context: Context): String {
    return this?.let { uri -> RealPathUtil.getRealPath(context, uri) ?: "" } ?: ""
}

fun ClipData.Item?.getFilePath(context: Context): String {
    return this?.uri?.getFilePath(context) ?: ""
}

// Usage
val selectedPath = intent.getFilePath(context)

This is not working if we are selecting a file from the download folder and if that file is downloaded from google drive. I am getting the path from the below code if the file does not exist.

cursor = context.contentResolver.query(uri, arrayOf(MediaStore.MediaColumns.DISPLAY_NAME), null, null, null)
                    cursor!!.moveToNext()
                    val fileName = cursor.getString(0)
                    val path = Environment.getExternalStorageDirectory().toString() + "/Download/" + fileName
                    if (!TextUtils.isEmpty(path)) {
                        return path
                    }

I created a library to facilitate the handling of Intent (Uri) received. It can be found here.

thanks for the code,
if i want to retrieve an audio file and use it on a media player how can i pass the audio to mediaPlayer.create?
Below is the code i have where i create and initiate the player

`
private fun controlSound(id: Uri){

    fab_play.setOnClickListener{
        if (mp == null){
            mp = MediaPlayer.create(this, id)
            Log.d("MediaPlayer", "ID: ${mp!!.audioSessionId}")
            initialiseSeekBar()
        }
        mp?.start()
        Log.d("MediaPlayer", "Duration: ${mp!!.duration/1000} seconds")
    }`