Java tutorial
/* * Copyright (C) 2014 Saravan Pantham * * 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.aniruddhc.acemusic.player.AsyncTasks; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.ArrayList; import org.apache.commons.io.FileUtils; import org.apache.commons.lang3.StringUtils; import org.jaudiotagger.audio.AudioFile; import org.jaudiotagger.audio.AudioFileIO; import org.jaudiotagger.audio.exceptions.CannotReadException; import org.jaudiotagger.audio.exceptions.CannotWriteException; import org.jaudiotagger.audio.exceptions.InvalidAudioFrameException; import org.jaudiotagger.audio.exceptions.ReadOnlyFileException; import org.jaudiotagger.tag.FieldDataInvalidException; import org.jaudiotagger.tag.Tag; import org.jaudiotagger.tag.TagException; import org.jaudiotagger.tag.images.Artwork; import org.jaudiotagger.tag.images.ArtworkFactory; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.graphics.Bitmap; import android.os.AsyncTask; import android.os.Environment; import android.view.View; import android.widget.Toast; import com.aniruddhc.acemusic.player.R; import com.aniruddhc.acemusic.player.DBHelpers.DBAccessHelper; import com.aniruddhc.acemusic.player.Utils.Common; public class AsyncGetAlbumArtTask extends AsyncTask<String, Void, Integer> { private Context mContext; private Common mApp; private String artist = ""; private String album = ""; private String urlArtist = ""; private String urlAlbum = ""; private String artworkURL; private File file; private Bitmap artworkBitmap; private Boolean URL_RETRIEVED = false; public static ArrayList<String> dataURIsList = new ArrayList<String>(); public AsyncGetAlbumArtTask(Context context, View viewItem, int imageID) { mContext = context; mApp = (Common) mContext.getApplicationContext(); } @Override protected void onPreExecute() { Toast.makeText(mContext, R.string.getting_album_art_toast, Toast.LENGTH_SHORT).show(); } @Override protected Integer doInBackground(String... params) { /************************************************************************************************ * RETRIEVE THE HTTP SEARCH RESPONSE FROM ITUNES SERVERS. ************************************************************************************************/ //First, we'll make a HTTP request to iTunes' servers with the album and artist name. if (params.length == 2) { artist = params[0]; album = params[1]; //Create duplicate strings that will be filtered out for the URL. urlArtist = artist; urlAlbum = album; //Remove any unacceptable characters. if (urlArtist.contains("#")) { urlArtist = urlArtist.replace("#", ""); } if (urlArtist.contains("$")) { urlArtist = urlArtist.replace("$", ""); } if (urlArtist.contains("@")) { urlArtist = urlArtist.replace("@", ""); } if (urlAlbum.contains("#")) { urlAlbum = urlAlbum.replace("#", ""); } if (urlAlbum.contains("$")) { urlAlbum = urlAlbum.replace("$", ""); } if (urlAlbum.contains("@")) { urlAlbum = urlAlbum.replace("@", ""); } //Replace any spaces in the artist and album fields with "%20". if (urlArtist.contains(" ")) { urlArtist = urlArtist.replace(" ", "%20"); } if (urlAlbum.contains(" ")) { urlAlbum = urlAlbum.replace(" ", "%20"); } } //Construct the url for the HTTP request. URL uri = null; try { uri = new URL("http://itunes.apple.com/search?term=" + urlArtist + "+" + urlAlbum + "&entity=album"); } catch (MalformedURLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); return 1; } try { //Create a new HTTP connection. HttpURLConnection urlConnection = (HttpURLConnection) uri.openConnection(); urlConnection.connect(); //Set the destination directory for the xml file. File SDCardRoot = Environment.getExternalStorageDirectory(); file = new File(SDCardRoot, "albumArt.xml"); //Create the OuputStream that will be used to store the downloaded data into the file. FileOutputStream fileOutput = new FileOutputStream(file); //Create the InputStream that will read the data from the HTTP connection. InputStream inputStream = urlConnection.getInputStream(); //Total size of target file. int totalSize = urlConnection.getContentLength(); //Temp variable that stores the number of downloaded bytes. int downloadedSize = 0; //Create a buffer to store the downloaded bytes. byte[] buffer = new byte[1024]; int bufferLength = 0; //Now read through the buffer and write the contents to the file. while ((bufferLength = inputStream.read(buffer)) > 0) { fileOutput.write(buffer, 0, bufferLength); downloadedSize += bufferLength; } //Close the File Output Stream. fileOutput.close(); } catch (MalformedURLException e) { //TODO Auto-generated method stub e.printStackTrace(); return 1; } catch (IOException e) { // TODO Auto-generated method stub e.printStackTrace(); return 1; } //Create a File object that points to the downloaded file. File phpSource = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/albumArt.xml"); String phpAsString = null; try { phpAsString = FileUtils.readFileToString(phpSource); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return 1; } //Extract the albumArt parameter from the PHP response. artworkURL = StringUtils.substringBetween(phpAsString, "\"artworkUrl100\":\"", "\","); if (artworkURL == null) { //Check and see if a lower resolution image available. artworkURL = StringUtils.substringBetween(phpAsString, "\"artworkUrl60\":\"", "\","); if (artworkURL == null) { URL_RETRIEVED = false; return 1; } else { //Replace "100x100" with "600x600" to retrieve larger album art images. artworkURL = artworkURL.replace("100x100", "600x600"); URL_RETRIEVED = true; } } else { //Replace "100x100" with "600x600" to retrieve larger album art images. artworkURL = artworkURL.replace("100x100", "600x600"); URL_RETRIEVED = true; } //Loop through the songs table and retrieve the data paths of all the songs (used to embed the artwork). //Replace any rogue apostrophes. if (album.contains("'")) { album = album.replace("'", "''"); } if (artist.contains("'")) { artist = artist.replace("'", "''"); } String selection = DBAccessHelper.SONG_ALBUM + "=" + "'" + album + "'" + " AND " + DBAccessHelper.SONG_ARTIST + "=" + "'" + artist + "'"; String[] projection = { DBAccessHelper._ID, DBAccessHelper.SONG_FILE_PATH }; Cursor cursor = mApp.getDBAccessHelper().getWritableDatabase().query(DBAccessHelper.MUSIC_LIBRARY_TABLE, projection, selection, null, null, null, null); if (cursor.getCount() != 0) { cursor.moveToFirst(); dataURIsList.add(cursor.getString(1)); while (cursor.moveToNext()) { dataURIsList.add(cursor.getString(1)); } } cursor.close(); if (URL_RETRIEVED == true) { artworkBitmap = mApp.getImageLoader().loadImageSync(artworkURL); File artworkFile = new File(Environment.getExternalStorageDirectory() + "/artwork.jpg"); //Display the album art on the grid/listview so that the user knows that the download is complete. publishProgress(); //Save the artwork. try { FileOutputStream out = new FileOutputStream(artworkFile); artworkBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out); out.flush(); out.close(); } catch (Exception e) { e.printStackTrace(); return 1; } finally { for (int i = 0; i < dataURIsList.size(); i++) { if (dataURIsList.get(i) != null) { File audioFile = new File(dataURIsList.get(i)); AudioFile f = null; try { f = AudioFileIO.read(audioFile); } catch (CannotReadException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (TagException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (ReadOnlyFileException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvalidAudioFrameException e) { // TODO Auto-generated catch block e.printStackTrace(); } Tag tag = null; try { if (f != null) { tag = f.getTag(); } else { continue; } } catch (Exception e) { e.printStackTrace(); continue; } Artwork artwork = null; try { artwork = ArtworkFactory.createArtworkFromFile(artworkFile); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); setArtworkAsFile(artworkFile, dataURIsList.get(i)); continue; } catch (Error e) { e.printStackTrace(); setArtworkAsFile(artworkFile, dataURIsList.get(i)); continue; } if (artwork != null) { try { tag.setField(artwork); } catch (FieldDataInvalidException e) { // TODO Auto-generated catch block e.printStackTrace(); setArtworkAsFile(artworkFile, dataURIsList.get(i)); continue; } catch (Exception e) { e.printStackTrace(); setArtworkAsFile(artworkFile, dataURIsList.get(i)); continue; } catch (Error e) { e.printStackTrace(); setArtworkAsFile(artworkFile, dataURIsList.get(i)); continue; } } try { f.commit(); } catch (CannotWriteException e) { // TODO Auto-generated catch block e.printStackTrace(); setArtworkAsFile(artworkFile, dataURIsList.get(i)); continue; } catch (Error e) { e.printStackTrace(); setArtworkAsFile(artworkFile, dataURIsList.get(i)); continue; } //Update the album art tag in Jams' database. ContentValues values = new ContentValues(); String filePath = dataURIsList.get(i); filePath = filePath.replace("'", "''"); String where = DBAccessHelper.SONG_FILE_PATH + "=" + "'" + filePath + "'"; values.put(DBAccessHelper.SONG_ALBUM_ART_PATH, "byte://" + dataURIsList.get(i)); mApp.getDBAccessHelper().getWritableDatabase().update(DBAccessHelper.MUSIC_LIBRARY_TABLE, values, where, null); } else { continue; } } //Refresh the memory/disk cache for the ImageLoader instance. try { mApp.getImageLoader().clearMemoryCache(); mApp.getImageLoader().clearDiscCache(); } catch (Exception e) { e.printStackTrace(); } //Delete the temporary files once the artwork has been embedded. artworkFile.delete(); file.delete(); } } return 0; } //Saves the artwork as a JPEG file in the song's parent folder. public void setArtworkAsFile(File artworkFile, String songFilePath) { File songFile = new File(songFilePath); String songTitle = songFile.getName(); int lastDotSlash = songTitle.lastIndexOf("."); String albumArtFileName = songTitle.substring(0, lastDotSlash); if (songFile.exists()) { int lastSlashIndex = songFilePath.lastIndexOf("/"); String folderPath = songFilePath.substring(0, lastSlashIndex); File destFile = new File(folderPath + "/" + albumArtFileName + ".jpg"); try { FileUtils.copyFile(artworkFile, destFile); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return; } //Update the album art tag in Jams' database. ContentValues values = new ContentValues(); songFilePath = songFilePath.replace("'", "''"); String where = DBAccessHelper.SONG_FILE_PATH + "=" + "'" + songFilePath + "'"; values.put(DBAccessHelper.SONG_ALBUM_ART_PATH, folderPath + "/" + albumArtFileName + ".jpg"); mApp.getDBAccessHelper().getWritableDatabase().update(DBAccessHelper.MUSIC_LIBRARY_TABLE, values, where, null); } } @Override protected void onProgressUpdate(Void... v) { if (URL_RETRIEVED == false) { Toast.makeText(mContext, R.string.album_art_not_found, Toast.LENGTH_SHORT).show(); } else { Toast.makeText(mContext, R.string.album_art_downloaded, Toast.LENGTH_SHORT).show(); } } @Override protected void onPostExecute(Integer result) { dataURIsList.clear(); if (result == 0) { //Update the UI. mApp.broadcastUpdateUICommand(new String[] {}, new String[] {}); Toast.makeText(mContext, R.string.album_art_downloaded, Toast.LENGTH_SHORT).show(); } else { Toast.makeText(mContext, R.string.unable_to_get_album_art, Toast.LENGTH_SHORT).show(); } } }