src/com/android/browser/OpenDownloadReceiver.java

/*
 * Copyright (C) 2010 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.browser;

import android.app.DownloadManager;
import android.content.ActivityNotFoundException;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.widget.Toast;

import java.io.File;

/**
 * This {@link BroadcastReceiver} handles clicks to notifications that
 * downloads from the browser are in progress/complete.  Clicking on an
 * in-progress or failed download will open the download manager.  Clicking on
 * a complete, successful download will open the file.
 */
public class OpenDownloadReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (!DownloadManager.ACTION_NOTIFICATION_CLICKED.equals(action)) {
            openDownloadsPage(context);
            return;
        }
        long ids[] = intent.getLongArrayExtra(
                DownloadManager.EXTRA_NOTIFICATION_CLICK_DOWNLOAD_IDS);
        if (ids == null || ids.length == 0) {
            openDownloadsPage(context);
            return;
        }
        long id = ids[0];
        DownloadManager.Query query = new DownloadManager.Query();
        query.setFilterById(id);
        DownloadManager manager = (DownloadManager) context.getSystemService(
                Context.DOWNLOAD_SERVICE);
        Cursor cursor = null;
        try {
            cursor = manager.query(query);
            if (cursor != null && cursor.moveToFirst()) {
                int status = cursor.getInt(cursor.getColumnIndexOrThrow(
                        DownloadManager.COLUMN_STATUS));
                if (DownloadManager.STATUS_SUCCESSFUL == status) {
                    Intent launchIntent = new Intent(Intent.ACTION_VIEW);
                    int uriCol = cursor.getColumnIndexOrThrow(
                            DownloadManager.COLUMN_LOCAL_FILENAME);
                    String filename = cursor.getString(uriCol);
                    Uri path = Uri.parse(filename);
                     // If there is no scheme, then it must be a file        
                    if (path.getScheme() == null) {     
                        path = Uri.fromFile(new File(filename));        
                    }
                    int typeCol = cursor.getColumnIndexOrThrow(
                            DownloadManager.COLUMN_MEDIA_TYPE);
                    String mimetype = cursor.getString(typeCol);
                    launchIntent.setDataAndType(path, mimetype);
                    launchIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    context.startActivity(launchIntent);
                } else {
                    // Open the downloads page
                    openDownloadsPage(context);
                }
            }
        } catch (ActivityNotFoundException ex) {        
            Toast.makeText(context, R.string.download_no_application_title,
                    Toast.LENGTH_LONG).show();
        } finally {
            if (cursor != null) cursor.close();
        }
    }

    /**
     * Open the Activity which shows a list of all downloads.
     * @param context
     */
    private void openDownloadsPage(Context context) {
        Intent pageView = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
        pageView.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(pageView);
    }
}