Added cancel action to notifications.

app/src/main/java/org/fdroid/fdroid/net/DownloaderService.java

@@ -168,6 +168,8 @@ public class DownloaderService extends Service {
                 .setAutoCancel(true)
                 .setContentIntent(createAppDetailsIntent(this, 0, packageName))
                 .setContentTitle(getNotificationTitle(packageName))
+                .addAction(R.drawable.ic_cancel_black_24dp, getString(R.string.cancel),
+                        createCancelDownloadIntent(this, 0, urlString))
                 .setSmallIcon(android.R.drawable.stat_sys_download)
                 .setContentText(urlString)
                 .setProgress(100, 0, true);
@@ -211,6 +213,17 @@ public class DownloaderService extends Service {
         return stackBuilder.getPendingIntent(requestCode, PendingIntent.FLAG_UPDATE_CURRENT);
     }
 
+    public static PendingIntent createCancelDownloadIntent(@NonNull Context context, int
+            requestCode, @NonNull String urlString) {
+        Intent cancelIntent = new Intent(context.getApplicationContext(), DownloaderService.class)
+                .setData(Uri.parse(urlString))
+                .setAction(ACTION_CANCEL);
+        return PendingIntent.getService(context.getApplicationContext(),
+                requestCode,
+                cancelIntent,
+                PendingIntent.FLAG_CANCEL_CURRENT);
+    }
+
     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
         onStart(intent, startId);
@@ -361,6 +374,7 @@ public class DownloaderService extends Service {
      * Check if a URL is waiting in the queue for downloading or if actively being downloaded.
      * This is useful for checking whether to re-register {@link android.content.BroadcastReceiver}s
      * in {@link android.app.Activity#onResume()}.
+     *
      * @see DownloaderService#isQueued(String)
      * @see DownloaderService#isActive(String)
      */

app/src/main/res/drawable/ic_cancel_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M12,2C6.47,2 2,6.47 2,12s4.47,10 10,10 10,-4.47 10,-10S17.53,2 12,2zM17,15.59L15.59,17 12,13.41 8.41,17 7,15.59 10.59,12 7,8.41 8.41,7 12,10.59 15.59,7 17,8.41 13.41,12 17,15.59z"/>
+</vector>