Ensure files get mediascanned after the download is completed.

Update file size in MediaStore to 0 before triggering mediascan
which should force MediaScanner to scan this file.

Also, add a clean-up job to trigger mediscan on already existing
downloads which should have been mediascanned but haven't and got
stuck in this state.

Bug: 138419471
Test: manual
Test: atest DownloadProviderTests
Test: atest cts/tests/app/src/android/app/cts/DownloadManagerTest.java
Test: atest DownloadManagerLegacy
Test: atest DownloadManagerApi28
Change-Id: I813086ceba6c70ca42309fcce5f9db209eac1575
(cherry picked from commit c2b0739b08e423e3c9fcde42b095cd72315ecf1f)

1 files changed, 24 insertions, 0 deletions

diff --git a/src/com/android/providers/downloads/Helpers.java b/src/com/android/providers/downloads/Helpers.java
index 565aa52e..f75b627f 100644
--- a/src/com/android/providers/downloads/Helpers.java
+++ b/src/com/android/providers/downloads/Helpers.java
@@ -34,18 +34,22 @@ import android.app.job.JobInfo;
 import android.app.job.JobScheduler;
 import android.content.ComponentName;
 import android.content.Context;
+import android.content.Intent;
 import android.database.Cursor;
 import android.net.Uri;
+import android.os.Bundle;
 import android.os.Environment;
 import android.os.FileUtils;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Process;
+import android.os.RemoteException;
 import android.os.SystemClock;
 import android.os.UserHandle;
 import android.os.storage.StorageManager;
 import android.os.storage.StorageVolume;
 import android.provider.Downloads;
+import android.provider.MediaStore;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.LongSparseArray;
@@ -489,6 +493,26 @@ public class Helpers {
         throw new IOException("Failed to generate an available filename");
     }
 
+    public static Uri convertToMediaStoreDownloadsUri(Uri mediaStoreUri) {
+        final String volumeName = MediaStore.getVolumeName(mediaStoreUri);
+        final long id = android.content.ContentUris.parseId(mediaStoreUri);
+        return MediaStore.Downloads.getContentUri(volumeName, id);
+    }
+
+    // TODO: Move it to MediaStore.
+    public static Uri triggerMediaScan(android.content.ContentProviderClient mediaProviderClient,
+            File file) {
+        try {
+            final Bundle in = new Bundle();
+            in.putParcelable(Intent.EXTRA_STREAM, Uri.fromFile(file));
+            final Bundle out = mediaProviderClient.call(MediaStore.SCAN_FILE_CALL, null, in);
+            return out.getParcelable(Intent.EXTRA_STREAM);
+        } catch (RemoteException e) {
+            // Should not happen
+        }
+        return null;
+    }
+
     public static boolean isFileInExternalAndroidDirs(String filePath) {
         return PATTERN_ANDROID_DIRS.matcher(filePath).matches();
     }