create notifications for music downloading

app/src/main/java/ru/vtosters/lite/downloaders/AudioDownloader.java

@@ -1,8 +1,13 @@
 package ru.vtosters.lite.downloaders;
 
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
 import android.os.Environment;
 import android.util.Log;
 
+import androidx.core.app.NotificationCompat;
+import androidx.core.app.NotificationManagerCompat;
+
 import com.vk.core.util.ToastUtils;
 import com.vk.dto.music.MusicTrack;
 
@@ -12,19 +17,26 @@ import java.util.Random;
 import ru.vtosters.lite.music.Callback;
 import ru.vtosters.lite.music.FFMpeg;
 import ru.vtosters.lite.music.M3UDownloader;
+import ru.vtosters.lite.utils.Globals;
 
 public class AudioDownloader {
+    private static NotificationManagerCompat notificationManager = NotificationManagerCompat.from(Globals.getContext());
+
     public static void downloadAudio(MusicTrack track) {
         if (track.D == null) {
             ToastUtils.a("Не удалось найти ссылку на аудиозапись");
             return;
         }
         var musicPath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC).getAbsolutePath();
-        var downloadPath = musicPath + File.separator + new Random().nextInt(100);
+        var tempId = new Random().nextInt(100);
+        var downloadPath = musicPath + File.separator + tempId;
+        var notification = buildDownloadNotification(track, tempId);
 
-        downloadAudioAsync(track, downloadPath, new Callback() {
+        downloadM3U8(track, downloadPath, new Callback() {
             @Override
             public void onProgress(int progress) {
+                notification.setProgress(100, progress, false);
+                notificationManager.notify(tempId, notification.build());
             }
 
             @Override
@@ -32,10 +44,15 @@ public class AudioDownloader {
                 try {
                     var fileName = track.toString();
                     var success = FFMpeg.convert(downloadPath, musicPath + File.separator + fileName + ".mp3");
-                    if (success)
-                        ToastUtils.a("Загрузка завершена");
-                    else
+                    if (success) {
+                        notification
+                                .setContentText("Загрузка завершена")
+                                .setProgress(0, 0, false)
+                                .setSmallIcon(android.R.drawable.stat_sys_download_done);
+                        notificationManager.notify(tempId, notification.build());
+                    } else {
                         onFailure();
+                    }
                 }
                 catch (UnsatisfiedLinkError e) {
                     Log.e("AudioDownloader","Опять эти нативные либы");
@@ -46,7 +63,8 @@ public class AudioDownloader {
 
             @Override
             public void onFailure() {
-                ToastUtils.a("Не удалось загрузить аудиозапись");
+                notification.setContentText("Не удалось загрузить аудиозапись").setProgress(0, 0, false);
+                notificationManager.notify(tempId, notification.build());
             }
 
             @Override
@@ -56,14 +74,27 @@ public class AudioDownloader {
         });
     }
 
-    private static void downloadAudioAsync(MusicTrack track, String path, Callback callback) {
+    private static void downloadM3U8(MusicTrack track, String path, Callback callback) {
         File outDir = new File(path);
         if (!outDir.exists())
             if (outDir.mkdir())
-                Log.i("AudioDownloader", "Directory created");
+                Log.v("AudioDownloader", "Directory created");
             else
                 Log.e("AudioDownloader", "Directory creation failed");
         Log.i("AudioDownloader", "Downloading audio to " + path);
         new M3UDownloader(track.D, outDir, callback).execute();
     }
+
+    private static NotificationCompat.Builder buildDownloadNotification(MusicTrack track, int id) {
+        var notificationBuilder = new NotificationCompat.Builder(Globals.getContext(), "music_downloads")
+                .setSmallIcon(android.R.drawable.stat_sys_download)
+                .setContentTitle("Загрузка аудиозаписи")
+                .setContentText(track.toString())
+                .setPriority(NotificationCompat.PRIORITY_LOW)
+                .setCategory(NotificationCompat.CATEGORY_PROGRESS)
+                .setAutoCancel(true);
+        notificationBuilder.setProgress(100, 0, false);
+        notificationManager.notify(id, notificationBuilder.build());
+        return notificationBuilder;
+    }
 }