DownloadManager COLUMN_LOCAL_FILENAME deprecated

Question

On Android N, i am getting an exception. It is a known issue per the documentation, which asks me to use ContentResolver.openFileDescriptor()

https://developer.android.com/reference/android/app/DownloadManager.html#COLUMN_LOCAL_FILENAME

I am not sure how to use. Where is the ContentResolver object here that I can use to get the filename? I never used it. So, I will appreciate any help.

08-04 11:20:59.765 7010 7290 W System.err: java.lang.SecurityException: COLUMN_LOCAL_FILENAME is deprecated; use ContentResolver.openFileDescriptor() instead

08-04 11:20:59.765 7010 7290 W System.err: at android.app.DownloadManager$CursorTranslator.getString(DownloadManager.java:1499)

Here is my code.

    DownloadManager.Query query = new DownloadManager.Query();
    query.setFilterById(id);
    Cursor cursor = downloadManager.query(query);

    final String downloadFilePath = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_FILENAME));
    cursor.close();

I tried the downlaodManager.getFileUri, but isn't what I am looking for. Appreciate any help.

Thanks

Answer 1

I solve this issue by using DownloadManager.COLUMN_LOCAL_URI instead of DownloadManager.COLUMN_LOCAL_FILENAME

DownloadManager.COLUMN_LOCAL_URI returns file path including "file://" so you have to exclude it from your downloadFilePath by using downloadFilePath = downloadFilePath.replace("file://","");

Here is one line solution of this issue:

String downloadFilePath = (c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI))).replace("file://","");

Check below complete code of DownloadManager:

DownloadFinishedReceiver.java

public class DownloadFinishedReceiver extends BroadcastReceiver {

    @Override
        public void onReceive(final Context context, Intent intent) {
            String action = intent.getAction();
            if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action) && intent.getExtras()!=null) {
                Bundle extras = intent.getExtras();
                DownloadManager.Query q = new DownloadManager.Query();
                long downloadId = extras.getLong(DownloadManager.EXTRA_DOWNLOAD_ID);
                q.setFilterById(downloadId);
                Cursor c = ((DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE)).query(q);
                if (c.moveToFirst()) {
                    int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
                    if (status == DownloadManager.STATUS_SUCCESSFUL) {

                        String downloadFilePath = (c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI))).replace("file://","");
                        String downloadTitle = c.getString(c.getColumnIndex(DownloadManager.COLUMN_TITLE));
                        c.close();

                        Log.e("DownloadPath", downloadFilePath); // Print DownloadPath in Logcat
                        Log.e("DownloadTitle", downloadTitle); // Print DownloadTitle in Logcat
                    } else if (status == DownloadManager.STATUS_FAILED) {
                        removeTempOnFailure(context, downloadId);
                    }
                }
            }
        }

        // Remove temp/cache data
        private void removeTempOnFailure(Context con, long downloadId) {
                File cacheFileDir = new File(con.getCacheDir().getAbsolutePath());
                for (File f : cacheFileDir.listFiles()) {
                    if (f.getName().contains(String.valueOf(downloadId))) {
                        f.delete();
                        break;
                    }
                }
            }
}

Register BroadcastReceiver in AndroidMenifest.xml file:

        <receiver
            android:name="com.example.receiver.DownloadFinishedReceiver"
            android:exported="true"
            android:process=".downloadFinished">
            <intent-filter>
                <action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
            </intent-filter>
        </receiver>

Put below method in your Activity and pass appropriate arguments:

     /**
     * 
     * @param downloadUrl -> Your file download url
     * @param downloadTitle -> Your file title to display in download manager
     * @param fileName -> filename with extension like music.mp3 it will store in download folder
     * @param hide -> true to hide downloadmanager in status bar, false to display it
     * @return -> it will return downloadId
     */
    private long downloadFromUrl(String downloadUrl, String downloadTitle, String fileName, boolean hide) {
        Uri uri = Uri.parse(downloadUrl);
        DownloadManager.Request request = new DownloadManager.Request(uri);
        request.setTitle(downloadTitle);
        if (hide) {
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);
            request.setVisibleInDownloadsUi(false);
        } else
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);

        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);

        DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
        return manager != null ? manager.enqueue(request) : 0;
    }

If you are passing hide = true in above method then you have to add following permission in AndroidManifext.xml

<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION"/>

Answer 2

Use the getUriForDownloadedFile to get the downloaded Uri.

DownloadManager downloadManager = DownloadManager.class.cast(getSystemService(DOWNLOAD_SERVICE));
Uri uri = downloadManager.getUriForDownloadedFile(id);