Android example source code file (DemoDataSet.java)

This example Android source code file (DemoDataSet.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

adding, android, assetmanager, content, contentresolver, contentvalues, demodataset, failed, file, filenotfoundexception, inputstream, intent, io, log_tag, outputstream, provider, string, uri, util, utilities

The DemoDataSet.java Android example source code

/*
 * Copyright (C) 2007 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.server;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.res.AssetManager;
import android.net.Uri;
import android.os.Environment;
import android.provider.Contacts;
import android.provider.Settings;
import android.provider.MediaStore.Images;
import android.util.Config;
import android.util.Slog;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.OutputStream;

public class DemoDataSet
{
    private final static String LOG_TAG = "DemoDataSet";

    private ContentResolver mContentResolver;

    public final void add(Context context)
    {
        mContentResolver = context.getContentResolver();

        // Remove all the old data
        mContentResolver.delete(Contacts.People.CONTENT_URI, null, null);

        // Add the new data
        addDefaultData();
        
        // Add images from /android/images
        addDefaultImages();
    }

    private final void addDefaultImages()
    {
        File rootDirectory = Environment.getRootDirectory();
        String [] files
            = new File(rootDirectory, "images").list();
        int count = files.length;

        if (count == 0) {
            Slog.i(LOG_TAG, "addDefaultImages: no images found!");
            return;
        }

        for (int i = 0; i < count; i++)
        {
            String name = files[i];
            String path = rootDirectory + "/" + name;
            
            try {
                Images.Media.insertImage(mContentResolver, path, name, null);
            } catch (FileNotFoundException e) {
                Slog.e(LOG_TAG, "Failed to import image " + path, e);
            }
        }
    }
    
    private final void addDefaultData()
    {
        Slog.i(LOG_TAG, "Adding default data...");

//       addImage("Violet", "images/violet.png");
//       addImage("Corky", "images/corky.png");

        // PENDING: should this be done here?!?!
        Intent intent = new Intent(
                Intent.ACTION_CALL, Uri.fromParts("voicemail", "", null));
        addShortcut("1", intent);
    }

    private final Uri addImage(String name, Uri file)
    {
        ContentValues imagev = new ContentValues();
        imagev.put("name", name);

        Uri url = null;

        AssetManager ass = AssetManager.getSystem();
        InputStream in = null;
        OutputStream out = null;
        
        try
        {
            in = ass.open(file.toString());

            url = mContentResolver.insert(Images.Media.INTERNAL_CONTENT_URI, imagev);
            out = mContentResolver.openOutputStream(url);

            final int size = 8 * 1024;
            byte[] buf = new byte[size];

            int count = 0;
            do
            {
                count = in.read(buf, 0, size);
                if (count > 0) {
                    out.write(buf, 0, count);
                }
            } while (count > 0);
        }
        catch (Exception e)
        {
            Slog.e(LOG_TAG, "Failed to insert image '" + file + "'", e);
            url = null;
        }

        return url;
    }

    private final Uri addShortcut(String shortcut, Intent intent)
    {
        if (Config.LOGV) Slog.v(LOG_TAG, "addShortcut: shortcut=" + shortcut + ", intent=" + intent);
        return Settings.Bookmarks.add(mContentResolver, intent, null, null,
                                      shortcut != null ? shortcut.charAt(0) : 0, 0);
    }
}