Add ability to rename a downloaded file.

package android.app;

import android.annotation.Nullable;

import android.annotation.SdkConstant;

import android.annotation.SdkConstant.SdkConstantType;

import android.content.ContentResolver;

import android.content.ContentUris;

import android.content.ContentValues;

import android.content.Context;

import android.content.Intent;

import android.database.Cursor;

import android.database.CursorWrapper;

import android.net.ConnectivityManager;

import android.net.Uri;

import android.os.Build;

import android.os.Environment;

import android.os.FileUtils;

import android.os.ParcelFileDescriptor;

import android.provider.Downloads;

import android.provider.Settings;

import android.provider.MediaStore.Images;

import android.provider.Settings.SettingNotFoundException;

import android.text.TextUtils;

import android.util.Pair;

        }

    }

    /**

     * Rename the given download if the download has completed

     *

     * @param context the {@link Context} to use in case need to update MediaProvider

     * @param id the downloaded id

     * @param displayName the new name to rename to

     * @return true if rename was successful, false otherwise

     * @hide

     */

    public boolean rename(Context context, long id, String displayName) {

        if (!FileUtils.isValidFatFilename(displayName)) {

            throw new SecurityException(displayName + " is not a valid filename");

        }

        Query query = new Query().setFilterById(id);

        Cursor cursor = null;

        String oldDisplayName = null;

        String mimeType = null;

        try {

            cursor = query(query);

            if (cursor == null) {

                return false;

            }

            if (cursor.moveToFirst()) {

                int status = cursor.getInt(cursor.getColumnIndexOrThrow(COLUMN_STATUS));

                if (DownloadManager.STATUS_SUCCESSFUL != status) {

                    return false;

                }

                oldDisplayName = cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_TITLE));

                mimeType = cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_MEDIA_TYPE));

            }

        } finally {

            if (cursor != null) {

                cursor.close();

            }

        }

        if (oldDisplayName == null || mimeType == null) {

            throw new IllegalStateException(

                    "Document with id " + id + " does not exist");

        }

        final File parent = Environment.getExternalStoragePublicDirectory(

                Environment.DIRECTORY_DOWNLOADS);

        final File before = new File(parent, oldDisplayName);

        final File after = new File(parent, displayName);

        if (after.exists()) {

            throw new IllegalStateException("Already exists " + after);

        }

        if (!before.renameTo(after)) {

            throw new IllegalStateException("Failed to rename to " + after);

        }

        // Update MediaProvider if necessary

        if (mimeType.startsWith("image/")) {

            context.getContentResolver().delete(Images.Media.EXTERNAL_CONTENT_URI,

                    Images.Media.DATA + "=?",

                    new String[] {

                            before.getAbsolutePath()

                    });

            Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);

            intent.setData(Uri.fromFile(after));

            context.sendBroadcast(intent);

        }

        ContentValues values = new ContentValues();

        values.put(Downloads.Impl.COLUMN_TITLE, displayName);

        values.put(Downloads.Impl._DATA, after.toString());

        values.putNull(Downloads.Impl.COLUMN_MEDIAPROVIDER_URI);

        long[] ids = {id};

        return (mResolver.update(mBaseUri, values, getWhereClauseForIds(ids),

                getWhereArgsForIds(ids)) == 1);

    }

    /**

     * Returns recommended maximum size, in bytes, of downloads that may go over a mobile

     * connection; or null if there's no recommended limit.  The user will have the option to bypass