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diff --git a/src/com/android/providers/downloads/MediaScanTriggerJob.java b/src/com/android/providers/downloads/MediaScanTriggerJob.java
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+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.providers.downloads;
+
+import static android.provider.BaseColumns._ID;
+import static android.provider.Downloads.Impl.ALL_DOWNLOADS_CONTENT_URI;
+import static android.provider.Downloads.Impl.COLUMN_DESTINATION;
+import static android.provider.Downloads.Impl.COLUMN_IS_VISIBLE_IN_DOWNLOADS_UI;
+import static android.provider.Downloads.Impl.COLUMN_MEDIASTORE_URI;
+import static android.provider.Downloads.Impl.COLUMN_MEDIA_SCANNED;
+import static android.provider.Downloads.Impl.DESTINATION_EXTERNAL;
+import static android.provider.Downloads.Impl.DESTINATION_FILE_URI;
+import static android.provider.Downloads.Impl.DESTINATION_NON_DOWNLOADMANAGER_DOWNLOAD;
+import static android.provider.Downloads.Impl.MEDIA_SCANNED;
+import static android.provider.Downloads.Impl._DATA;
+
+import static com.android.providers.downloads.Constants.MEDIA_SCAN_TRIGGER_JOB_ID;
+
+import android.app.job.JobInfo;
+import android.app.job.JobParameters;
+import android.app.job.JobScheduler;
+import android.app.job.JobService;
+import android.content.ComponentName;
+import android.content.ContentProviderClient;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.RemoteException;
+import android.provider.Downloads;
+import android.provider.MediaStore;
+
+import java.io.File;
+
+/**
+ * Clean-up job to force mediascan on downloads which should have been but didn't get mediascanned.
+ */
+public class MediaScanTriggerJob extends JobService {
+ private volatile boolean mJobStopped;
+
+ @Override
+ public boolean onStartJob(JobParameters parameters) {
+ Helpers.getAsyncHandler().post(() -> {
+ final String selection = _DATA + " IS NOT NULL"
+ + " AND (" + COLUMN_IS_VISIBLE_IN_DOWNLOADS_UI + "=1"
+ + " OR " + COLUMN_MEDIA_SCANNED + "=" + MEDIA_SCANNED + ")"
+ + " AND (" + COLUMN_DESTINATION + "=" + DESTINATION_EXTERNAL
+ + " OR " + COLUMN_DESTINATION + "=" + DESTINATION_FILE_URI
+ + " OR " + COLUMN_DESTINATION + "=" + DESTINATION_NON_DOWNLOADMANAGER_DOWNLOAD
+ + ")";
+ try (ContentProviderClient downloadProviderClient
+ = getContentResolver().acquireContentProviderClient(Downloads.Impl.AUTHORITY);
+ ContentProviderClient mediaProviderClient
+ = getContentResolver().acquireContentProviderClient(MediaStore.AUTHORITY)) {
+ try (Cursor cursor = downloadProviderClient.query(ALL_DOWNLOADS_CONTENT_URI,
+ new String[] {_ID, _DATA, COLUMN_MEDIASTORE_URI},
+ selection, null, null)) {
+ while (cursor.moveToNext()) {
+ if (mJobStopped) {
+ return;
+ }
+ // This indicates that this entry has been handled already (perhaps when
+ // this job ran earlier and got preempted), so skip.
+ if (cursor.getString(2) != null) {
+ continue;
+ }
+ final long id = cursor.getLong(0);
+ final String filePath = cursor.getString(1);
+ final ContentValues mediaValues = new ContentValues();
+ mediaValues.put(MediaStore.Files.FileColumns.SIZE, 0);
+ mediaProviderClient.update(MediaStore.Files.getContentUriForPath(filePath),
+ mediaValues,
+ MediaStore.Files.FileColumns.DATA + "=?",
+ new String[] { filePath });
+
+ final Uri mediaStoreUri = Helpers.triggerMediaScan(mediaProviderClient,
+ new File(filePath));
+ if (mediaStoreUri != null) {
+ final ContentValues downloadValues = new ContentValues();
+ downloadValues.put(COLUMN_MEDIASTORE_URI, mediaStoreUri.toString());
+ downloadProviderClient.update(ALL_DOWNLOADS_CONTENT_URI,
+ downloadValues, _ID + "=" + id, null);
+ }
+ }
+ } catch (RemoteException e) {
+ // Should not happen
+ }
+ }
+ jobFinished(parameters, false);
+ });
+ return true;
+ }
+
+ @Override
+ public boolean onStopJob(JobParameters parameters) {
+ mJobStopped = true;
+ return true;
+ }
+
+ public static void schedule(Context context) {
+ final JobScheduler scheduler = context.getSystemService(JobScheduler.class);
+ final JobInfo job = new JobInfo.Builder(MEDIA_SCAN_TRIGGER_JOB_ID,
+ new ComponentName(context, MediaScanTriggerJob.class))
+ .setRequiresCharging(true)
+ .setRequiresDeviceIdle(true)
+ .build();
+ scheduler.schedule(job);
+ }
+}