Download Functionality Added.

app/src/main/AndroidManifest.xml

@@ -9,7 +9,7 @@
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
-    <uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />
+<!--    <uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />-->
 
     <application
         android:allowBackup="true"

app/src/main/java/com/shabinder/musicForEveryone/MainActivity.kt

@@ -1,6 +1,8 @@
 package com.shabinder.musicForEveryone
 
 import android.Manifest
+import android.app.DownloadManager
+import android.content.Context
 import android.content.Intent
 import android.os.Build
 import android.os.Bundle
@@ -11,7 +13,7 @@ import androidx.databinding.DataBindingUtil
 import androidx.lifecycle.ViewModelProvider
 import com.github.kiulian.downloader.YoutubeDownloader
 import com.shabinder.musicForEveryone.databinding.MainActivityBinding
-import com.shabinder.musicForEveryone.utils.YoutubeConnector
+import com.shabinder.musicForEveryone.utils.YoutubeInterface
 import com.spotify.sdk.android.authentication.AuthenticationClient
 import com.spotify.sdk.android.authentication.AuthenticationRequest
 import com.spotify.sdk.android.authentication.AuthenticationResponse
@@ -24,6 +26,7 @@ import retrofit.RestAdapter
 class MainActivity : AppCompatActivity() {
     private lateinit var binding: MainActivityBinding
     var ytDownloader : YoutubeDownloader? = null
+    var downloadManager : DownloadManager? = null
     val REDIRECT_URI = "musicforeveryone://callback"
     val CLIENT_ID:String = "694d8bf4f6ec420fa66ea7fb4c68f89d"
 //    val musicDirectory = File(this.filesDir?.absolutePath + "/Music/")
@@ -49,8 +52,11 @@ class MainActivity : AppCompatActivity() {
         ytDownloader = YoutubeDownloader()
         sharedViewModel.ytDownloader = ytDownloader
         //Initialing Communication with Youtube
-        YoutubeConnector.youtubeConnector()
+        YoutubeInterface.youtubeConnector()
 
+        //Getting System Download Manager
+        downloadManager = getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
+        sharedViewModel.downloadManager = downloadManager
 
 
     }

app/src/main/java/com/shabinder/musicForEveryone/SharedViewModel.kt

@@ -1,5 +1,6 @@
 package com.shabinder.musicForEveryone
 
+import android.app.DownloadManager
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import com.github.kiulian.downloader.YoutubeDownloader
@@ -14,6 +15,8 @@ class SharedViewModel : ViewModel() {
     var spotify :SpotifyService? = null
     var spotifyExtra :SpotifyNewService? = null
     var ytDownloader : YoutubeDownloader? = null
+    var downloadManager : DownloadManager? = null
+
 
     fun getTrackDetails(trackLink:String): Track?{
         return spotify?.getTrack(trackLink)

app/src/main/java/com/shabinder/musicForEveryone/downloadHelper/DownloadHelper.kt

@@ -0,0 +1,88 @@
+package com.shabinder.musicForEveryone.downloadHelper
+
+import android.app.DownloadManager
+import android.app.DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED
+import android.net.Uri
+import android.os.Environment
+import android.util.Log
+import com.github.kiulian.downloader.YoutubeDownloader
+import com.github.kiulian.downloader.model.formats.Format
+import com.github.kiulian.downloader.model.quality.AudioQuality
+import com.shabinder.musicForEveryone.utils.YoutubeInterface
+import java.io.File
+
+interface DownloadHelper {
+    fun downloadTrack(ytDownloader: YoutubeDownloader?, downloadManager: DownloadManager?, searchQuery:String){
+        //@data = 1st object from YT query.
+        val data = YoutubeInterface.search(searchQuery)?.get(0)
+        if (data==null){Log.i("DownloadHelper","Youtube Request Failed!")}else{
+
+            //Fetching a Video Object.
+            val video = ytDownloader?.getVideo(data.id)
+            val details = video?.details()
+
+            val format:Format = video?.findAudioWithQuality(AudioQuality.low)?.get(0) as Format
+
+            val audioUrl = format.url()
+
+            if (audioUrl != null) {
+                downloadFile(audioUrl,downloadManager,details?.title()?:"Error")
+                Log.i("DHelper Start Download", audioUrl)
+            }else{Log.i("YT audio url is null", format.toString())}
+
+//            Library Inbuilt function to Save File (Need Scoped Storage Implementation)
+//            val file: File = video.download( format , outputDir)
+}
+    }
+
+    /**
+     * Downloading Using Android Download Manager
+     * */
+    fun downloadFile(url: String, downloadManager: DownloadManager?,title:String){
+        val audioUri = Uri.parse(url)
+        val outputDir = File.separator + "Spotify-Downloads" +File.separator + "${removeIllegalChars(title)}.mp3"
+
+        val request = DownloadManager.Request(audioUri)
+            .setAllowedNetworkTypes(
+                DownloadManager.Request.NETWORK_WIFI or
+                DownloadManager.Request.NETWORK_MOBILE
+            )
+            .setAllowedOverRoaming(false)
+            .setTitle(title)
+            .setDescription("Spotify Downloader Working Up here...")
+            .setDestinationInExternalPublicDir(Environment.DIRECTORY_MUSIC,outputDir)
+            .setNotificationVisibility(VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
+        downloadManager?.enqueue(request)
+        Log.i("DownloadManager","Download Request Sent")
+    }
+
+
+    /**
+     * Removing Illegal Chars from File Name
+     * **/
+    fun removeIllegalChars(fileName: String): String? {
+        val illegalCharArray = charArrayOf(
+            '/',
+            '\n',
+            '\r',
+            '\t',
+            '\u0000',
+            '\u000C',
+            '`',
+            '?',
+            '*',
+            '\\',
+            '<',
+            '>',
+            '|',
+            '\"',
+            '.',
+            ':'
+        )
+        var name = fileName
+        for (c in illegalCharArray) {
+            name = fileName.replace(c, '_')
+        }
+        return name
+    }
+}

app/src/main/java/com/shabinder/musicForEveryone/fragments/MainFragment.kt

@@ -1,7 +1,6 @@
 package com.shabinder.musicForEveryone.fragments
 
 import android.os.Bundle
-import android.os.Environment
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
@@ -11,23 +10,20 @@ import androidx.databinding.DataBindingUtil
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModelProvider
-import com.github.kiulian.downloader.model.formats.Format
-import com.github.kiulian.downloader.model.quality.AudioQuality
 import com.google.android.material.snackbar.Snackbar
 import com.shabinder.musicForEveryone.R
 import com.shabinder.musicForEveryone.SharedViewModel
 import com.shabinder.musicForEveryone.bindImage
 import com.shabinder.musicForEveryone.databinding.MainFragmentBinding
-import com.shabinder.musicForEveryone.utils.YoutubeConnector
+import com.shabinder.musicForEveryone.downloadHelper.DownloadHelper
 import kaaes.spotify.webapi.android.SpotifyService
-import java.io.File
 
 
-class MainFragment : Fragment() {
+class MainFragment : Fragment(),DownloadHelper {
     lateinit var binding:MainFragmentBinding
     private lateinit var sharedViewModel: SharedViewModel
     var spotify : SpotifyService? = null
-
+    var type:String = ""
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
@@ -45,9 +41,9 @@ class MainFragment : Fragment() {
             val spotifyLink = binding.spotifyLink.text.toString()
 
             val link = spotifyLink.substringAfterLast('/' , "Error").substringBefore('?')
-            val type = spotifyLink.substringBeforeLast('/' , "Error").substringAfterLast('/')
+            type = spotifyLink.substringBeforeLast('/' , "Error").substringAfterLast('/')
 
-            Log.i("Fragment",link)
+            Log.i("Fragment", "$type : $link")
 
             when(type){
                 "track" -> {
@@ -100,29 +96,9 @@ class MainFragment : Fragment() {
         }
 
         binding.btnDownload.setOnClickListener {
-           val data = YoutubeConnector.search(
-               "${binding.name.text} ${if(binding.artist.text != "TextView" ){binding.artist.text}else{""}}")
-               ?.get(0)
-            if (data==null){showToast("Youtube Request Failed!")}else{
-                val ytDownloader = sharedViewModel.ytDownloader
-                val video = ytDownloader?.getVideo(data.id)
-                val details = video?.details()
-
-                val outputDir = File(Environment.getExternalStorageDirectory().toString() + File.separator + "MyAudio")
-                val format:Format = video?.findAudioWithQuality(AudioQuality.low)?.get(0) as Format
-                val audioUrl = format.url()
-                if (audioUrl != null) {
-                    Log.i("ytDownloader", audioUrl)
-                }else{Log.i("YT audio url is null", format.toString())}
-
-                val file:File = video.download( format , outputDir)
-
-                Log.i("YT File Path=> ", file.path)
-
-                Log.i("ytDownloader", details?.title()?:"Error")
-                binding.name.text = details?.title()
+            downloadTrack(sharedViewModel.ytDownloader,sharedViewModel.downloadManager,"${binding.name.text} ${if(binding.artist.text != "TextView" ){binding.artist.text}else{""}}")
             }
-        }
+
 
         return binding.root
     }

app/src/main/java/com/shabinder/musicForEveryone/utils/YoutubeInterface.kt

@@ -7,7 +7,7 @@ import com.google.api.client.json.jackson2.JacksonFactory
 import com.google.api.services.youtube.YouTube
 import java.io.IOException
 
-object YoutubeConnector {
+object YoutubeInterface {
     private var youtube: YouTube? = null
     private var query:YouTube.Search.List? = null
     var apiKey:String = "AIzaSyDuRmMA_2mF56BjlhhNpa0SIbjMgjjFaEI"
@@ -15,8 +15,7 @@ object YoutubeConnector {
 
     fun youtubeConnector() {
         youtube =
-            YouTube.Builder(NetHttpTransport(), JacksonFactory(),
-                HttpRequestInitializer { })
+            YouTube.Builder(NetHttpTransport(), JacksonFactory(), HttpRequestInitializer { })
                 .setApplicationName("Music For Everyone").build()
         try {
             query = youtube?.search()?.list("id,snippet")

build.gradle

@@ -10,7 +10,7 @@ buildscript {
 
     }
     dependencies {
-        classpath "com.android.tools.build:gradle:4.0.0"
+        classpath "com.android.tools.build:gradle:4.0.1"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         //safe-Args
         classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$navigationVersion"