Java tutorial
/* This file is part of Subsonic. Subsonic is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Subsonic is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Subsonic. If not, see <http://www.gnu.org/licenses/>. Copyright 2009 (C) Sindre Mehus */ package github.daneren2005.dsub.util; import android.annotation.TargetApi; import android.app.Activity; import android.app.AlertDialog; import android.app.Notification; import android.app.PendingIntent; import android.content.ComponentName; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.media.AudioManager; import android.media.AudioManager.OnAudioFocusChangeListener; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.wifi.WifiManager; import android.os.Build; import android.os.Environment; import android.os.Handler; import android.support.v4.app.NotificationCompat; import android.text.SpannableString; import android.text.method.LinkMovementMethod; import android.text.util.Linkify; import android.util.Log; import android.view.Gravity; import android.view.ViewGroup; import android.view.KeyEvent; import android.widget.LinearLayout; import android.widget.RemoteViews; import android.widget.TextView; import android.widget.Toast; import github.daneren2005.dsub.R; import github.daneren2005.dsub.activity.MainActivity; import github.daneren2005.dsub.domain.MusicDirectory; import github.daneren2005.dsub.domain.PlayerState; import github.daneren2005.dsub.domain.RepeatMode; import github.daneren2005.dsub.domain.Version; import github.daneren2005.dsub.provider.DSubWidgetProvider; import github.daneren2005.dsub.receiver.MediaButtonIntentReceiver; import github.daneren2005.dsub.service.DownloadService; import github.daneren2005.dsub.service.DownloadServiceImpl; import org.apache.http.HttpEntity; import java.io.ByteArrayOutputStream; import java.io.Closeable; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.lang.reflect.Constructor; import java.lang.reflect.Method; import java.security.MessageDigest; import java.text.DecimalFormat; import java.text.NumberFormat; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; /** * @author Sindre Mehus * @version $Id$ */ public final class Util { private static final String TAG = Util.class.getSimpleName(); private static final DecimalFormat GIGA_BYTE_FORMAT = new DecimalFormat("0.00 GB"); private static final DecimalFormat MEGA_BYTE_FORMAT = new DecimalFormat("0.00 MB"); private static final DecimalFormat KILO_BYTE_FORMAT = new DecimalFormat("0 KB"); private static DecimalFormat GIGA_BYTE_LOCALIZED_FORMAT = null; private static DecimalFormat MEGA_BYTE_LOCALIZED_FORMAT = null; private static DecimalFormat KILO_BYTE_LOCALIZED_FORMAT = null; private static DecimalFormat BYTE_LOCALIZED_FORMAT = null; public static final String EVENT_META_CHANGED = "github.daneren2005.dsub.EVENT_META_CHANGED"; public static final String EVENT_PLAYSTATE_CHANGED = "github.daneren2005.dsub.EVENT_PLAYSTATE_CHANGED"; public static final String AVRCP_PLAYSTATE_CHANGED = "com.android.music.playstatechanged"; public static final String AVRCP_METADATA_CHANGED = "com.android.music.metachanged"; private static boolean hasFocus = false; private static boolean pauseFocus = false; private static boolean lowerFocus = false; private static final Map<Integer, Version> SERVER_REST_VERSIONS = new ConcurrentHashMap<Integer, Version>(); // Used by hexEncode() private static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; private final static Pair<Integer, Integer> NOTIFICATION_TEXT_COLORS = new Pair<Integer, Integer>(); private static Toast toast; private Util() { } public static boolean isOffline(Context context) { SharedPreferences prefs = getPreferences(context); return prefs.getBoolean(Constants.PREFERENCES_KEY_OFFLINE, false); } public static void setOffline(Context context, boolean offline) { SharedPreferences prefs = getPreferences(context); SharedPreferences.Editor editor = prefs.edit(); editor.putBoolean(Constants.PREFERENCES_KEY_OFFLINE, offline); editor.commit(); } public static boolean isScreenLitOnDownload(Context context) { SharedPreferences prefs = getPreferences(context); return prefs.getBoolean(Constants.PREFERENCES_KEY_SCREEN_LIT_ON_DOWNLOAD, false); } public static RepeatMode getRepeatMode(Context context) { SharedPreferences prefs = getPreferences(context); return RepeatMode.valueOf(prefs.getString(Constants.PREFERENCES_KEY_REPEAT_MODE, RepeatMode.OFF.name())); } public static void setRepeatMode(Context context, RepeatMode repeatMode) { SharedPreferences prefs = getPreferences(context); SharedPreferences.Editor editor = prefs.edit(); editor.putString(Constants.PREFERENCES_KEY_REPEAT_MODE, repeatMode.name()); editor.commit(); } public static boolean isScrobblingEnabled(Context context) { SharedPreferences prefs = getPreferences(context); return prefs.getBoolean(Constants.PREFERENCES_KEY_SCROBBLE, false); } public static void setActiveServer(Context context, int instance) { SharedPreferences prefs = getPreferences(context); SharedPreferences.Editor editor = prefs.edit(); editor.putInt(Constants.PREFERENCES_KEY_SERVER_INSTANCE, instance); editor.putString(Constants.PREFERENCES_KEY_MUSIC_FOLDER_ID + instance, null); editor.commit(); } public static int getActiveServer(Context context) { SharedPreferences prefs = getPreferences(context); return prefs.getInt(Constants.PREFERENCES_KEY_SERVER_INSTANCE, 1); } public static boolean checkServerVersion(Context context, String requiredVersion) { Version version = Util.getServerRestVersion(context); Version required = new Version(requiredVersion); if (version != null && version.compareTo(required) >= 0) { return true; } else { return false; } } public static int getServerCount(Context context) { SharedPreferences prefs = getPreferences(context); return prefs.getInt(Constants.PREFERENCES_KEY_SERVER_COUNT, 1); } public static void removeInstanceName(Context context, int instance, int activeInstance) { SharedPreferences prefs = getPreferences(context); SharedPreferences.Editor editor = prefs.edit(); int newInstance = instance + 1; String server = prefs.getString(Constants.PREFERENCES_KEY_SERVER_KEY + newInstance, null); String serverName = prefs.getString(Constants.PREFERENCES_KEY_SERVER_NAME + newInstance, null); String serverUrl = prefs.getString(Constants.PREFERENCES_KEY_SERVER_URL + newInstance, null); String userName = prefs.getString(Constants.PREFERENCES_KEY_USERNAME + newInstance, null); String password = prefs.getString(Constants.PREFERENCES_KEY_PASSWORD + newInstance, null); editor.putString(Constants.PREFERENCES_KEY_SERVER_KEY + instance, server); editor.putString(Constants.PREFERENCES_KEY_SERVER_NAME + instance, serverName); editor.putString(Constants.PREFERENCES_KEY_SERVER_URL + instance, serverUrl); editor.putString(Constants.PREFERENCES_KEY_USERNAME + instance, userName); editor.putString(Constants.PREFERENCES_KEY_PASSWORD + instance, password); editor.putString(Constants.PREFERENCES_KEY_SERVER_KEY + newInstance, null); editor.putString(Constants.PREFERENCES_KEY_SERVER_NAME + newInstance, null); editor.putString(Constants.PREFERENCES_KEY_SERVER_URL + newInstance, null); editor.putString(Constants.PREFERENCES_KEY_USERNAME + newInstance, null); editor.putString(Constants.PREFERENCES_KEY_PASSWORD + newInstance, null); editor.commit(); if (instance == activeInstance) { if (instance != 1) { Util.setActiveServer(context, 1); } else { Util.setOffline(context, true); } } else if (newInstance == activeInstance) { Util.setActiveServer(context, instance); } } public static String getServerName(Context context) { SharedPreferences prefs = getPreferences(context); int instance = prefs.getInt(Constants.PREFERENCES_KEY_SERVER_INSTANCE, 1); return prefs.getString(Constants.PREFERENCES_KEY_SERVER_NAME + instance, null); } public static String getServerName(Context context, int instance) { SharedPreferences prefs = getPreferences(context); return prefs.getString(Constants.PREFERENCES_KEY_SERVER_NAME + instance, null); } public static String getUserName(Context context, int instance) { if (instance == 0) { return context.getResources().getString(R.string.main_offline); } SharedPreferences prefs = getPreferences(context); return prefs.getString(Constants.PREFERENCES_KEY_USERNAME + instance, null); } public static void setServerRestVersion(Context context, Version version) { int instance = getActiveServer(context); Version current = SERVER_REST_VERSIONS.get(instance); if (current != version) { SERVER_REST_VERSIONS.put(instance, version); SharedPreferences.Editor editor = getPreferences(context).edit(); editor.putString(Constants.PREFERENCES_KEY_SERVER_VERSION + instance, version.getVersion()); editor.commit(); } } public static Version getServerRestVersion(Context context) { int instance = getActiveServer(context); Version version = SERVER_REST_VERSIONS.get(instance); if (version == null) { SharedPreferences prefs = getPreferences(context); String versionString = prefs.getString(Constants.PREFERENCES_KEY_SERVER_VERSION + instance, null); if (versionString != null) { version = new Version(versionString); SERVER_REST_VERSIONS.put(instance, version); } } return version; } public static void setSelectedMusicFolderId(Context context, String musicFolderId) { int instance = getActiveServer(context); SharedPreferences prefs = getPreferences(context); SharedPreferences.Editor editor = prefs.edit(); editor.putString(Constants.PREFERENCES_KEY_MUSIC_FOLDER_ID + instance, musicFolderId); editor.commit(); } public static String getSelectedMusicFolderId(Context context) { SharedPreferences prefs = getPreferences(context); int instance = getActiveServer(context); return prefs.getString(Constants.PREFERENCES_KEY_MUSIC_FOLDER_ID + instance, null); } public static String getTheme(Context context) { SharedPreferences prefs = getPreferences(context); return prefs.getString(Constants.PREFERENCES_KEY_THEME, null); } public static boolean getDisplayTrack(Context context) { SharedPreferences prefs = getPreferences(context); return prefs.getBoolean(Constants.PREFERENCES_KEY_DISPLAY_TRACK, false); } public static int getMaxBitrate(Context context) { ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo = manager.getActiveNetworkInfo(); if (networkInfo == null) { return 0; } boolean wifi = networkInfo.getType() == ConnectivityManager.TYPE_WIFI; SharedPreferences prefs = getPreferences(context); return Integer.parseInt(prefs.getString( wifi ? Constants.PREFERENCES_KEY_MAX_BITRATE_WIFI : Constants.PREFERENCES_KEY_MAX_BITRATE_MOBILE, "0")); } public static int getMaxVideoBitrate(Context context) { ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo = manager.getActiveNetworkInfo(); if (networkInfo == null) { return 0; } boolean wifi = networkInfo.getType() == ConnectivityManager.TYPE_WIFI; SharedPreferences prefs = getPreferences(context); return Integer.parseInt(prefs.getString(wifi ? Constants.PREFERENCES_KEY_MAX_VIDEO_BITRATE_WIFI : Constants.PREFERENCES_KEY_MAX_VIDEO_BITRATE_MOBILE, "0")); } public static int getPreloadCount(Context context) { ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo = manager.getActiveNetworkInfo(); if (networkInfo == null) { return 3; } SharedPreferences prefs = getPreferences(context); boolean wifi = networkInfo.getType() == ConnectivityManager.TYPE_WIFI; int preloadCount = Integer.parseInt(prefs.getString(wifi ? Constants.PREFERENCES_KEY_PRELOAD_COUNT_WIFI : Constants.PREFERENCES_KEY_PRELOAD_COUNT_MOBILE, "-1")); return preloadCount == -1 ? Integer.MAX_VALUE : preloadCount; } public static int getCacheSizeMB(Context context) { SharedPreferences prefs = getPreferences(context); int cacheSize = Integer.parseInt(prefs.getString(Constants.PREFERENCES_KEY_CACHE_SIZE, "-1")); return cacheSize == -1 ? Integer.MAX_VALUE : cacheSize; } public static String getRestUrl(Context context, String method) { StringBuilder builder = new StringBuilder(); SharedPreferences prefs = getPreferences(context); int instance = prefs.getInt(Constants.PREFERENCES_KEY_SERVER_INSTANCE, 1); String serverUrl = prefs.getString(Constants.PREFERENCES_KEY_SERVER_URL + instance, null); String username = prefs.getString(Constants.PREFERENCES_KEY_USERNAME + instance, null); String password = prefs.getString(Constants.PREFERENCES_KEY_PASSWORD + instance, null); // Slightly obfuscate password password = "enc:" + Util.utf8HexEncode(password); builder.append(serverUrl); if (builder.charAt(builder.length() - 1) != '/') { builder.append("/"); } builder.append("rest/").append(method).append(".view"); builder.append("?u=").append(username); builder.append("&p=").append(password); builder.append("&v=").append(Constants.REST_PROTOCOL_VERSION); builder.append("&c=").append(Constants.REST_CLIENT_ID); return builder.toString(); } public static String getVideoPlayerType(Context context) { SharedPreferences prefs = getPreferences(context); return prefs.getString(Constants.PREFERENCES_KEY_VIDEO_PLAYER, "raw"); } public static SharedPreferences getPreferences(Context context) { return context.getSharedPreferences(Constants.PREFERENCES_FILE_NAME, 0); } public static SharedPreferences getOfflineSync(Context context) { return context.getSharedPreferences(Constants.OFFLINE_SYNC_NAME, 0); } public static String getSyncDefault(Context context) { SharedPreferences prefs = Util.getOfflineSync(context); return prefs.getString(Constants.OFFLINE_SYNC_DEFAULT, null); } public static void setSyncDefault(Context context, String defaultValue) { SharedPreferences.Editor editor = Util.getOfflineSync(context).edit(); editor.putString(Constants.OFFLINE_SYNC_DEFAULT, defaultValue); editor.commit(); } public static int offlineScrobblesCount(Context context) { SharedPreferences offline = getOfflineSync(context); return offline.getInt(Constants.OFFLINE_SCROBBLE_COUNT, 0); } public static int offlineStarsCount(Context context) { SharedPreferences offline = getOfflineSync(context); return offline.getInt(Constants.OFFLINE_STAR_COUNT, 0); } public static String parseOfflineIDSearch(Context context, String id, String cacheLocation) { String name = id.replace(cacheLocation, ""); if (name.startsWith("/")) { name = name.substring(1); } name = name.replace(".complete", "").replace(".partial", ""); int index = name.lastIndexOf("."); name = index == -1 ? name : name.substring(0, index); String[] details = name.split("/"); String title = details[details.length - 1]; if (index == -1) { if (details.length > 1) { String artist = "artist:\"" + details[details.length - 2] + "\""; String simpleArtist = "artist:\"" + title + "\""; title = "album:\"" + title + "\""; if (details[details.length - 1].equals(details[details.length - 2])) { name = title; } else { name = "(" + artist + " AND " + title + ")" + " OR " + simpleArtist; } } else { name = "artist:\"" + title + "\" OR album:\"" + title + "\""; } } else { String artist; if (details.length > 2) { artist = "artist:\"" + details[details.length - 3] + "\""; } else { artist = "(artist:\"" + details[0] + "\" OR album:\"" + details[0] + "\")"; } title = "title:\"" + title.substring(title.indexOf('-') + 1) + "\""; name = artist + " AND " + title; } return name; } public static String getContentType(HttpEntity entity) { if (entity == null || entity.getContentType() == null) { return null; } return entity.getContentType().getValue(); } public static int getRemainingTrialDays(Context context) { SharedPreferences prefs = getPreferences(context); long installTime = prefs.getLong(Constants.PREFERENCES_KEY_INSTALL_TIME, 0L); if (installTime == 0L) { installTime = System.currentTimeMillis(); SharedPreferences.Editor editor = prefs.edit(); editor.putLong(Constants.PREFERENCES_KEY_INSTALL_TIME, installTime); editor.commit(); } long now = System.currentTimeMillis(); long millisPerDay = 24L * 60L * 60L * 1000L; int daysSinceInstall = (int) ((now - installTime) / millisPerDay); return Math.max(0, Constants.FREE_TRIAL_DAYS - daysSinceInstall); } /** * Get the contents of an <code>InputStream</code> as a <code>byte[]</code>. * <p/> * This method buffers the input internally, so there is no need to use a * <code>BufferedInputStream</code>. * * @param input the <code>InputStream</code> to read from * @return the requested byte array * @throws NullPointerException if the input is null * @throws IOException if an I/O error occurs */ public static byte[] toByteArray(InputStream input) throws IOException { ByteArrayOutputStream output = new ByteArrayOutputStream(); copy(input, output); return output.toByteArray(); } public static long copy(InputStream input, OutputStream output) throws IOException { byte[] buffer = new byte[1024 * 4]; long count = 0; int n; while (-1 != (n = input.read(buffer))) { output.write(buffer, 0, n); count += n; } return count; } public static void atomicCopy(File from, File to) throws IOException { FileInputStream in = null; FileOutputStream out = null; File tmp = null; try { tmp = new File(to.getPath() + ".tmp"); in = new FileInputStream(from); out = new FileOutputStream(tmp); in.getChannel().transferTo(0, from.length(), out.getChannel()); out.close(); if (!tmp.renameTo(to)) { throw new IOException("Failed to rename " + tmp + " to " + to); } Log.i(TAG, "Copied " + from + " to " + to); } catch (IOException x) { close(out); delete(to); throw x; } finally { close(in); close(out); delete(tmp); } } public static void renameFile(File from, File to) throws IOException { if (from.renameTo(to)) { Log.i(TAG, "Renamed " + from + " to " + to); } else { atomicCopy(from, to); } } public static void close(Closeable closeable) { try { if (closeable != null) { closeable.close(); } } catch (Throwable x) { // Ignored } } public static boolean delete(File file) { if (file != null && file.exists()) { if (!file.delete()) { Log.w(TAG, "Failed to delete file " + file); return false; } Log.i(TAG, "Deleted file " + file); } return true; } public static boolean recursiveDelete(File dir) { if (dir != null && dir.exists()) { for (File file : dir.listFiles()) { if (file.isDirectory()) { if (!recursiveDelete(file)) { return false; } } else if (file.exists()) { if (!file.delete()) { return false; } } } return dir.delete(); } return false; } public static void toast(Context context, int messageId) { toast(context, messageId, true); } public static void toast(Context context, int messageId, boolean shortDuration) { toast(context, context.getString(messageId), shortDuration); } public static void toast(Context context, String message) { toast(context, message, true); } public static void toast(Context context, String message, boolean shortDuration) { if (toast == null) { toast = Toast.makeText(context, message, shortDuration ? Toast.LENGTH_SHORT : Toast.LENGTH_LONG); toast.setGravity(Gravity.CENTER, 0, 0); } else { toast.setText(message); toast.setDuration(shortDuration ? Toast.LENGTH_SHORT : Toast.LENGTH_LONG); } toast.show(); } public static void confirmDialog(Context context, int action, String subject, DialogInterface.OnClickListener onClick) { Util.confirmDialog(context, context.getResources().getString(action).toLowerCase(), subject, onClick); } public static void confirmDialog(Context context, String action, String subject, DialogInterface.OnClickListener onClick) { new AlertDialog.Builder(context).setIcon(android.R.drawable.ic_dialog_alert) .setTitle(R.string.common_confirm) .setMessage(context.getResources().getString(R.string.common_confirm_message, action, subject)) .setPositiveButton(R.string.common_ok, onClick).setNegativeButton(R.string.common_cancel, null) .show(); } /** * Converts a byte-count to a formatted string suitable for display to the user. * For instance: * <ul> * <li><code>format(918)</code> returns <em>"918 B"</em>.</li> * <li><code>format(98765)</code> returns <em>"96 KB"</em>.</li> * <li><code>format(1238476)</code> returns <em>"1.2 MB"</em>.</li> * </ul> * This method assumes that 1 KB is 1024 bytes. * To get a localized string, please use formatLocalizedBytes instead. * * @param byteCount The number of bytes. * @return The formatted string. */ public static synchronized String formatBytes(long byteCount) { // More than 1 GB? if (byteCount >= 1024 * 1024 * 1024) { NumberFormat gigaByteFormat = GIGA_BYTE_FORMAT; return gigaByteFormat.format((double) byteCount / (1024 * 1024 * 1024)); } // More than 1 MB? if (byteCount >= 1024 * 1024) { NumberFormat megaByteFormat = MEGA_BYTE_FORMAT; return megaByteFormat.format((double) byteCount / (1024 * 1024)); } // More than 1 KB? if (byteCount >= 1024) { NumberFormat kiloByteFormat = KILO_BYTE_FORMAT; return kiloByteFormat.format((double) byteCount / 1024); } return byteCount + " B"; } /** * Converts a byte-count to a formatted string suitable for display to the user. * For instance: * <ul> * <li><code>format(918)</code> returns <em>"918 B"</em>.</li> * <li><code>format(98765)</code> returns <em>"96 KB"</em>.</li> * <li><code>format(1238476)</code> returns <em>"1.2 MB"</em>.</li> * </ul> * This method assumes that 1 KB is 1024 bytes. * This version of the method returns a localized string. * * @param byteCount The number of bytes. * @return The formatted string. */ public static synchronized String formatLocalizedBytes(long byteCount, Context context) { // More than 1 GB? if (byteCount >= 1024 * 1024 * 1024) { if (GIGA_BYTE_LOCALIZED_FORMAT == null) { GIGA_BYTE_LOCALIZED_FORMAT = new DecimalFormat( context.getResources().getString(R.string.util_bytes_format_gigabyte)); } return GIGA_BYTE_LOCALIZED_FORMAT.format((double) byteCount / (1024 * 1024 * 1024)); } // More than 1 MB? if (byteCount >= 1024 * 1024) { if (MEGA_BYTE_LOCALIZED_FORMAT == null) { MEGA_BYTE_LOCALIZED_FORMAT = new DecimalFormat( context.getResources().getString(R.string.util_bytes_format_megabyte)); } return MEGA_BYTE_LOCALIZED_FORMAT.format((double) byteCount / (1024 * 1024)); } // More than 1 KB? if (byteCount >= 1024) { if (KILO_BYTE_LOCALIZED_FORMAT == null) { KILO_BYTE_LOCALIZED_FORMAT = new DecimalFormat( context.getResources().getString(R.string.util_bytes_format_kilobyte)); } return KILO_BYTE_LOCALIZED_FORMAT.format((double) byteCount / 1024); } if (BYTE_LOCALIZED_FORMAT == null) { BYTE_LOCALIZED_FORMAT = new DecimalFormat( context.getResources().getString(R.string.util_bytes_format_byte)); } return BYTE_LOCALIZED_FORMAT.format((double) byteCount); } public static String formatDuration(Integer seconds) { if (seconds == null) { return null; } int hours = seconds / 3600; int minutes = (seconds / 60) % 60; int secs = seconds % 60; StringBuilder builder = new StringBuilder(7); if (hours > 0) { builder.append(hours).append(":"); if (minutes < 10) { builder.append("0"); } } builder.append(minutes).append(":"); if (secs < 10) { builder.append("0"); } builder.append(secs); return builder.toString(); } public static boolean equals(Object object1, Object object2) { if (object1 == object2) { return true; } if (object1 == null || object2 == null) { return false; } return object1.equals(object2); } /** * Encodes the given string by using the hexadecimal representation of its UTF-8 bytes. * * @param s The string to encode. * @return The encoded string. */ public static String utf8HexEncode(String s) { if (s == null) { return null; } byte[] utf8; try { utf8 = s.getBytes(Constants.UTF_8); } catch (UnsupportedEncodingException x) { throw new RuntimeException(x); } return hexEncode(utf8); } /** * Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order. * The returned array will be double the length of the passed array, as it takes two characters to represent any * given byte. * * @param data Bytes to convert to hexadecimal characters. * @return A string containing hexadecimal characters. */ public static String hexEncode(byte[] data) { int length = data.length; char[] out = new char[length << 1]; // two characters form the hex value. for (int i = 0, j = 0; i < length; i++) { out[j++] = HEX_DIGITS[(0xF0 & data[i]) >>> 4]; out[j++] = HEX_DIGITS[0x0F & data[i]]; } return new String(out); } /** * Calculates the MD5 digest and returns the value as a 32 character hex string. * * @param s Data to digest. * @return MD5 digest as a hex string. */ public static String md5Hex(String s) { if (s == null) { return null; } try { MessageDigest md5 = MessageDigest.getInstance("MD5"); return hexEncode(md5.digest(s.getBytes(Constants.UTF_8))); } catch (Exception x) { throw new RuntimeException(x.getMessage(), x); } } public static boolean isNullOrWhiteSpace(String string) { return string == null || string.isEmpty() || string.trim().isEmpty(); } public static boolean isNetworkConnected(Context context) { ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo = manager.getActiveNetworkInfo(); boolean connected = networkInfo != null && networkInfo.isConnected(); boolean wifiConnected = connected && networkInfo.getType() == ConnectivityManager.TYPE_WIFI; boolean wifiRequired = isWifiRequiredForDownload(context); return connected && (!wifiRequired || wifiConnected); } public static boolean isExternalStoragePresent() { return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()); } private static boolean isWifiRequiredForDownload(Context context) { SharedPreferences prefs = getPreferences(context); return prefs.getBoolean(Constants.PREFERENCES_KEY_WIFI_REQUIRED_FOR_DOWNLOAD, false); } public static void info(Context context, int titleId, int messageId) { showDialog(context, android.R.drawable.ic_dialog_info, titleId, messageId); } public static void info(Context context, int titleId, String message) { showDialog(context, android.R.drawable.ic_dialog_info, titleId, message); } public static void info(Context context, String title, String message) { showDialog(context, android.R.drawable.ic_dialog_info, title, message); } private static void showDialog(Context context, int icon, int titleId, int messageId) { showDialog(context, icon, context.getResources().getString(titleId), context.getResources().getString(messageId)); } private static void showDialog(Context context, int icon, int titleId, String message) { showDialog(context, icon, context.getResources().getString(titleId), message); } private static void showDialog(Context context, int icon, String title, String message) { SpannableString ss = new SpannableString(message); Linkify.addLinks(ss, Linkify.ALL); AlertDialog dialog = new AlertDialog.Builder(context).setIcon(icon).setTitle(title).setMessage(ss) .setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int i) { dialog.dismiss(); } }).show(); ((TextView) dialog.findViewById(android.R.id.message)).setMovementMethod(LinkMovementMethod.getInstance()); } public static void showPlayingNotification(final Context context, final DownloadServiceImpl downloadService, Handler handler, MusicDirectory.Entry song) { // Set the icon, scrolling text and timestamp final Notification notification = new Notification(R.drawable.stat_notify_playing, song.getTitle(), System.currentTimeMillis()); notification.flags |= Notification.FLAG_NO_CLEAR | Notification.FLAG_ONGOING_EVENT; boolean playing = downloadService.getPlayerState() == PlayerState.STARTED; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { RemoteViews expandedContentView = new RemoteViews(context.getPackageName(), R.layout.notification_expanded); setupViews(expandedContentView, context, song, playing); notification.bigContentView = expandedContentView; } RemoteViews smallContentView = new RemoteViews(context.getPackageName(), R.layout.notification); setupViews(smallContentView, context, song, playing); notification.contentView = smallContentView; Intent notificationIntent = new Intent(context, MainActivity.class); notificationIntent.putExtra(Constants.INTENT_EXTRA_NAME_DOWNLOAD, true); notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP); notification.contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0); handler.post(new Runnable() { @Override public void run() { downloadService.startForeground(Constants.NOTIFICATION_ID_PLAYING, notification); } }); // Update widget DSubWidgetProvider.notifyInstances(context, downloadService, true); } private static void setupViews(RemoteViews rv, Context context, MusicDirectory.Entry song, boolean playing) { // Use the same text for the ticker and the expanded notification String title = song.getTitle(); String arist = song.getArtist(); String album = song.getAlbum(); // Set the album art. try { int size = context.getResources().getDrawable(R.drawable.unknown_album).getIntrinsicHeight(); Bitmap bitmap = FileUtil.getAlbumArtBitmap(context, song, size); if (bitmap == null) { // set default album art rv.setImageViewResource(R.id.notification_image, R.drawable.unknown_album); } else { rv.setImageViewBitmap(R.id.notification_image, bitmap); } } catch (Exception x) { Log.w(TAG, "Failed to get notification cover art", x); rv.setImageViewResource(R.id.notification_image, R.drawable.unknown_album); } // set the text for the notifications rv.setTextViewText(R.id.notification_title, title); rv.setTextViewText(R.id.notification_artist, arist); rv.setTextViewText(R.id.notification_album, album); Pair<Integer, Integer> colors = getNotificationTextColors(context); if (colors.getFirst() != null) { rv.setTextColor(R.id.notification_title, colors.getFirst()); } if (colors.getSecond() != null) { rv.setTextColor(R.id.notification_artist, colors.getSecond()); } if (!playing) { rv.setImageViewResource(R.id.control_pause, R.drawable.notification_play); rv.setImageViewResource(R.id.control_previous, R.drawable.notification_stop); } // Create actions for media buttons PendingIntent pendingIntent; if (playing) { Intent prevIntent = new Intent("KEYCODE_MEDIA_PREVIOUS"); prevIntent.setComponent(new ComponentName(context, DownloadServiceImpl.class)); prevIntent.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PREVIOUS)); pendingIntent = PendingIntent.getService(context, 0, prevIntent, 0); rv.setOnClickPendingIntent(R.id.control_previous, pendingIntent); } else { Intent prevIntent = new Intent("KEYCODE_MEDIA_STOP"); prevIntent.setComponent(new ComponentName(context, DownloadServiceImpl.class)); prevIntent.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_STOP)); pendingIntent = PendingIntent.getService(context, 0, prevIntent, 0); rv.setOnClickPendingIntent(R.id.control_previous, pendingIntent); } Intent pauseIntent = new Intent("KEYCODE_MEDIA_PLAY_PAUSE"); pauseIntent.setComponent(new ComponentName(context, DownloadServiceImpl.class)); pauseIntent.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE)); pendingIntent = PendingIntent.getService(context, 0, pauseIntent, 0); rv.setOnClickPendingIntent(R.id.control_pause, pendingIntent); Intent nextIntent = new Intent("KEYCODE_MEDIA_NEXT"); nextIntent.setComponent(new ComponentName(context, DownloadServiceImpl.class)); nextIntent.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_NEXT)); pendingIntent = PendingIntent.getService(context, 0, nextIntent, 0); rv.setOnClickPendingIntent(R.id.control_next, pendingIntent); } public static void hidePlayingNotification(final Context context, final DownloadServiceImpl downloadService, Handler handler) { // Remove notification and remove the service from the foreground handler.post(new Runnable() { @Override public void run() { downloadService.stopForeground(true); } }); // Update widget DSubWidgetProvider.notifyInstances(context, downloadService, false); } public static void sleepQuietly(long millis) { try { Thread.sleep(millis); } catch (InterruptedException x) { Log.w(TAG, "Interrupted from sleep.", x); } } public static void startActivityWithoutTransition(Activity currentActivity, Class<? extends Activity> newActivitiy) { startActivityWithoutTransition(currentActivity, new Intent(currentActivity, newActivitiy)); } public static void startActivityWithoutTransition(Activity currentActivity, Intent intent) { currentActivity.startActivity(intent); disablePendingTransition(currentActivity); } public static void disablePendingTransition(Activity activity) { // Activity.overridePendingTransition() was introduced in Android 2.0. Use reflection to maintain // compatibility with 1.5. try { Method method = Activity.class.getMethod("overridePendingTransition", int.class, int.class); method.invoke(activity, 0, 0); } catch (Throwable x) { // Ignored } } public static Drawable createDrawableFromBitmap(Context context, Bitmap bitmap) { // BitmapDrawable(Resources, Bitmap) was introduced in Android 1.6. Use reflection to maintain // compatibility with 1.5. try { Constructor<BitmapDrawable> constructor = BitmapDrawable.class.getConstructor(Resources.class, Bitmap.class); return constructor.newInstance(context.getResources(), bitmap); } catch (Throwable x) { return new BitmapDrawable(bitmap); } } public static void registerMediaButtonEventReceiver(Context context) { // Only do it if enabled in the settings. SharedPreferences prefs = getPreferences(context); boolean enabled = prefs.getBoolean(Constants.PREFERENCES_KEY_MEDIA_BUTTONS, true); if (enabled) { // AudioManager.registerMediaButtonEventReceiver() was introduced in Android 2.2. // Use reflection to maintain compatibility with 1.5. try { AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); ComponentName componentName = new ComponentName(context.getPackageName(), MediaButtonIntentReceiver.class.getName()); Method method = AudioManager.class.getMethod("registerMediaButtonEventReceiver", ComponentName.class); method.invoke(audioManager, componentName); } catch (Throwable x) { // Ignored. } } } public static void unregisterMediaButtonEventReceiver(Context context) { // AudioManager.unregisterMediaButtonEventReceiver() was introduced in Android 2.2. // Use reflection to maintain compatibility with 1.5. try { AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); ComponentName componentName = new ComponentName(context.getPackageName(), MediaButtonIntentReceiver.class.getName()); Method method = AudioManager.class.getMethod("unregisterMediaButtonEventReceiver", ComponentName.class); method.invoke(audioManager, componentName); } catch (Throwable x) { // Ignored. } } @TargetApi(8) public static void requestAudioFocus(final Context context) { if (Build.VERSION.SDK_INT >= 8 && !hasFocus) { final AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); hasFocus = true; audioManager.requestAudioFocus(new OnAudioFocusChangeListener() { public void onAudioFocusChange(int focusChange) { DownloadServiceImpl downloadService = (DownloadServiceImpl) context; if ((focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT || focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK) && !downloadService.isJukeboxEnabled()) { if (downloadService.getPlayerState() == PlayerState.STARTED) { SharedPreferences prefs = getPreferences(context); int lossPref = Integer .parseInt(prefs.getString(Constants.PREFERENCES_KEY_TEMP_LOSS, "1")); if (lossPref == 2 || (lossPref == 1 && focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK)) { lowerFocus = true; downloadService.setVolume(0.1f); } else if (lossPref == 0 || (lossPref == 1 && focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT)) { pauseFocus = true; downloadService.pause(); } } } else if (focusChange == AudioManager.AUDIOFOCUS_GAIN) { if (pauseFocus) { pauseFocus = false; downloadService.start(); } else if (lowerFocus) { lowerFocus = false; downloadService.setVolume(1.0f); } } else if (focusChange == AudioManager.AUDIOFOCUS_LOSS && !downloadService.isJukeboxEnabled()) { hasFocus = false; downloadService.pause(); audioManager.abandonAudioFocus(this); } } }, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN); } } /** * <p>Broadcasts the given song info as the new song being played.</p> */ public static void broadcastNewTrackInfo(Context context, MusicDirectory.Entry song) { DownloadService downloadService = (DownloadServiceImpl) context; Intent intent = new Intent(EVENT_META_CHANGED); Intent avrcpIntent = new Intent(AVRCP_METADATA_CHANGED); if (song != null) { intent.putExtra("title", song.getTitle()); intent.putExtra("artist", song.getArtist()); intent.putExtra("album", song.getAlbum()); File albumArtFile = FileUtil.getAlbumArtFile(context, song); intent.putExtra("coverart", albumArtFile.getAbsolutePath()); avrcpIntent.putExtra("playing", true); avrcpIntent.putExtra("track", song.getTitle()); avrcpIntent.putExtra("artist", song.getArtist()); avrcpIntent.putExtra("album", song.getAlbum()); avrcpIntent.putExtra("ListSize", (long) downloadService.getSongs().size()); avrcpIntent.putExtra("id", (long) downloadService.getCurrentPlayingIndex() + 1); avrcpIntent.putExtra("duration", (long) downloadService.getPlayerDuration()); avrcpIntent.putExtra("position", (long) downloadService.getPlayerPosition()); avrcpIntent.putExtra("coverart", albumArtFile.getAbsolutePath()); } else { intent.putExtra("title", ""); intent.putExtra("artist", ""); intent.putExtra("album", ""); intent.putExtra("coverart", ""); avrcpIntent.putExtra("playing", false); avrcpIntent.putExtra("track", ""); avrcpIntent.putExtra("artist", ""); avrcpIntent.putExtra("album", ""); avrcpIntent.putExtra("ListSize", (long) 0); avrcpIntent.putExtra("id", (long) 0); avrcpIntent.putExtra("duration", (long) 0); avrcpIntent.putExtra("position", (long) 0); avrcpIntent.putExtra("coverart", ""); } context.sendBroadcast(intent); context.sendBroadcast(avrcpIntent); } /** * <p>Broadcasts the given player state as the one being set.</p> */ public static void broadcastPlaybackStatusChange(Context context, PlayerState state) { Intent intent = new Intent(EVENT_PLAYSTATE_CHANGED); Intent avrcpIntent = new Intent(AVRCP_PLAYSTATE_CHANGED); switch (state) { case STARTED: intent.putExtra("state", "play"); avrcpIntent.putExtra("playing", true); break; case STOPPED: intent.putExtra("state", "stop"); avrcpIntent.putExtra("playing", false); break; case PAUSED: intent.putExtra("state", "pause"); avrcpIntent.putExtra("playing", false); break; case COMPLETED: intent.putExtra("state", "complete"); avrcpIntent.putExtra("playing", false); break; default: return; // No need to broadcast. } context.sendBroadcast(intent); context.sendBroadcast(avrcpIntent); } /** * Resolves the default text color for notifications. * * Based on http://stackoverflow.com/questions/4867338/custom-notification-layouts-and-text-colors/7320604#7320604 */ private static Pair<Integer, Integer> getNotificationTextColors(Context context) { if (NOTIFICATION_TEXT_COLORS.getFirst() == null && NOTIFICATION_TEXT_COLORS.getSecond() == null) { try { Notification notification = new Notification(); String title = "title"; String content = "content"; notification.setLatestEventInfo(context, title, content, null); LinearLayout group = new LinearLayout(context); ViewGroup event = (ViewGroup) notification.contentView.apply(context, group); findNotificationTextColors(event, title, content); group.removeAllViews(); } catch (Exception x) { Log.w(TAG, "Failed to resolve notification text colors.", x); } } return NOTIFICATION_TEXT_COLORS; } private static void findNotificationTextColors(ViewGroup group, String title, String content) { for (int i = 0; i < group.getChildCount(); i++) { if (group.getChildAt(i) instanceof TextView) { TextView textView = (TextView) group.getChildAt(i); String text = textView.getText().toString(); if (title.equals(text)) { NOTIFICATION_TEXT_COLORS.setFirst(textView.getTextColors().getDefaultColor()); } else if (content.equals(text)) { NOTIFICATION_TEXT_COLORS.setSecond(textView.getTextColors().getDefaultColor()); } } else if (group.getChildAt(i) instanceof ViewGroup) findNotificationTextColors((ViewGroup) group.getChildAt(i), title, content); } } public static WifiManager.WifiLock createWifiLock(Context context, String tag) { WifiManager wm = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); int lockType = WifiManager.WIFI_MODE_FULL; if (Build.VERSION.SDK_INT >= 12) { lockType = 3; } return wm.createWifiLock(lockType, tag); } }