Java tutorial
/* Copyright 2017 Andrew Dawson * * This file is a part of Tusky. * * This program 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. * * Tusky 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 Tusky; if not, * see <http://www.gnu.org/licenses>. */ package com.keylesspalace.tusky.util; import android.app.NotificationChannel; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Build; import android.preference.PreferenceManager; import android.provider.Settings; import android.support.annotation.Nullable; import android.support.v4.app.NotificationCompat; import android.support.v4.app.TaskStackBuilder; import android.support.v4.content.ContextCompat; import android.util.Log; import com.keylesspalace.tusky.MainActivity; import com.keylesspalace.tusky.NotificationPullJobCreator; import com.keylesspalace.tusky.R; import com.keylesspalace.tusky.entity.Notification; import com.keylesspalace.tusky.receiver.NotificationClearBroadcastReceiver; import com.keylesspalace.tusky.view.RoundedTransformation; import com.squareup.picasso.Picasso; import org.json.JSONArray; import org.json.JSONException; import java.io.IOException; import java.util.ArrayList; import java.util.List; public class NotificationManager { private static final String TAG = "NotificationManager"; /** * notification channels used on Android O+ **/ private static final String CHANNEL_MENTION = "CHANNEL_MENTION"; private static final String CHANNEL_FOLLOW = "CHANNEL_FOLLOW"; private static final String CHANNEL_BOOST = "CHANNEL_BOOST"; private static final String CHANNEL_FAVOURITE = " CHANNEL_FAVOURITE"; /** * Takes a given Mastodon notification and either creates a new Android notification or updates * the state of the existing notification to reflect the new interaction. * * @param context to access application preferences and services * @param notifyId an arbitrary number to reference this notification for any future action * @param body a new Mastodon notification */ public static void make(final Context context, final int notifyId, Notification body) { final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context); final SharedPreferences notificationPreferences = context.getSharedPreferences("Notifications", Context.MODE_PRIVATE); if (!filterNotification(preferences, body)) { return; } createNotificationChannels(context); String rawCurrentNotifications = notificationPreferences.getString("current", "[]"); JSONArray currentNotifications; try { currentNotifications = new JSONArray(rawCurrentNotifications); } catch (JSONException e) { currentNotifications = new JSONArray(); } boolean alreadyContains = false; for (int i = 0; i < currentNotifications.length(); i++) { try { if (currentNotifications.getString(i).equals(body.account.getDisplayName())) { alreadyContains = true; } } catch (JSONException e) { Log.d(TAG, Log.getStackTraceString(e)); } } if (!alreadyContains) { currentNotifications.put(body.account.getDisplayName()); } notificationPreferences.edit().putString("current", currentNotifications.toString()).apply(); Intent resultIntent = new Intent(context, MainActivity.class); resultIntent.putExtra("tab_position", 1); TaskStackBuilder stackBuilder = TaskStackBuilder.create(context); stackBuilder.addParentStack(MainActivity.class); stackBuilder.addNextIntent(resultIntent); PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT); Intent deleteIntent = new Intent(context, NotificationClearBroadcastReceiver.class); PendingIntent deletePendingIntent = PendingIntent.getBroadcast(context, 0, deleteIntent, PendingIntent.FLAG_CANCEL_CURRENT); final NotificationCompat.Builder builder = new NotificationCompat.Builder(context, getChannelId(body)) .setSmallIcon(R.drawable.ic_notify).setContentIntent(resultPendingIntent) .setDeleteIntent(deletePendingIntent).setColor(ContextCompat.getColor(context, (R.color.primary))) .setDefaults(0); // So it doesn't ring twice, notify only in Target callback setupPreferences(preferences, builder); if (currentNotifications.length() == 1) { builder.setContentTitle(titleForType(context, body)) .setContentText(truncateWithEllipses(bodyForType(body), 40)); //load the avatar synchronously Bitmap accountAvatar; try { accountAvatar = Picasso.with(context).load(body.account.avatar) .transform(new RoundedTransformation(7, 0)).get(); } catch (IOException e) { Log.d(TAG, "error loading account avatar", e); accountAvatar = BitmapFactory.decodeResource(context.getResources(), R.drawable.avatar_default); } builder.setLargeIcon(accountAvatar); } else { try { String format = context.getString(R.string.notification_title_summary); String title = String.format(format, currentNotifications.length()); String text = truncateWithEllipses(joinNames(context, currentNotifications), 40); builder.setContentTitle(title).setContentText(text); } catch (JSONException e) { Log.d(TAG, Log.getStackTraceString(e)); } } if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { builder.setVisibility(android.app.Notification.VISIBILITY_PRIVATE); builder.setCategory(android.app.Notification.CATEGORY_SOCIAL); } android.app.NotificationManager notificationManager = (android.app.NotificationManager) context .getSystemService(Context.NOTIFICATION_SERVICE); //noinspection ConstantConditions notificationManager.notify(notifyId, builder.build()); } public static void createNotificationChannels(Context context) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { android.app.NotificationManager mNotificationManager = (android.app.NotificationManager) context .getSystemService(Context.NOTIFICATION_SERVICE); String[] channelIds = new String[] { CHANNEL_MENTION, CHANNEL_FOLLOW, CHANNEL_BOOST, CHANNEL_FAVOURITE }; int[] channelNames = { R.string.notification_channel_mention_name, R.string.notification_channel_follow_name, R.string.notification_channel_boost_name, R.string.notification_channel_favourite_name }; int[] channelDescriptions = { R.string.notification_channel_mention_descriptions, R.string.notification_channel_follow_description, R.string.notification_channel_boost_description, R.string.notification_channel_favourite_description }; List<NotificationChannel> channels = new ArrayList<>(4); for (int i = 0; i < channelIds.length; i++) { String id = channelIds[i]; String name = context.getString(channelNames[i]); String description = context.getString(channelDescriptions[i]); int importance = android.app.NotificationManager.IMPORTANCE_DEFAULT; NotificationChannel channel = new NotificationChannel(id, name, importance); channel.setDescription(description); channel.enableLights(true); channel.enableVibration(true); channel.setShowBadge(true); channels.add(channel); } //noinspection ConstantConditions mNotificationManager.createNotificationChannels(channels); } } public static void clearNotifications(@Nullable Context context) { if (context != null) { SharedPreferences notificationPreferences = context.getSharedPreferences("Notifications", Context.MODE_PRIVATE); notificationPreferences.edit().putString("current", "[]").apply(); android.app.NotificationManager manager = (android.app.NotificationManager) context .getSystemService(Context.NOTIFICATION_SERVICE); //noinspection ConstantConditions manager.cancel(NotificationPullJobCreator.NOTIFY_ID); } } private static boolean filterNotification(SharedPreferences preferences, Notification notification) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { return true; //do not filter on Android O or newer, the system does it for us } switch (notification.type) { default: case MENTION: return preferences.getBoolean("notificationFilterMentions", true); case FOLLOW: return preferences.getBoolean("notificationFilterFollows", true); case REBLOG: return preferences.getBoolean("notificationFilterReblogs", true); case FAVOURITE: return preferences.getBoolean("notificationFilterFavourites", true); } } private static String getChannelId(Notification notification) { switch (notification.type) { default: case MENTION: return CHANNEL_MENTION; case FOLLOW: return CHANNEL_FOLLOW; case REBLOG: return CHANNEL_BOOST; case FAVOURITE: return CHANNEL_FAVOURITE; } } @SuppressWarnings("SameParameterValue") private static String truncateWithEllipses(String string, int limit) { if (string.length() < limit) { return string; } else { return string.substring(0, limit - 3) + "..."; } } private static void setupPreferences(SharedPreferences preferences, NotificationCompat.Builder builder) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { return; //do nothing on Android O or newer, the system uses the channel settings anyway } if (preferences.getBoolean("notificationAlertSound", true)) { builder.setSound(Settings.System.DEFAULT_NOTIFICATION_URI); } if (preferences.getBoolean("notificationAlertVibrate", false)) { builder.setVibrate(new long[] { 500, 500 }); } if (preferences.getBoolean("notificationAlertLight", false)) { builder.setLights(0xFF00FF8F, 300, 1000); } } @Nullable private static String joinNames(Context context, JSONArray array) throws JSONException { if (array.length() > 3) { return String.format(context.getString(R.string.notification_summary_large), array.get(0), array.get(1), array.get(2), array.length() - 3); } else if (array.length() == 3) { return String.format(context.getString(R.string.notification_summary_medium), array.get(0), array.get(1), array.get(2)); } else if (array.length() == 2) { return String.format(context.getString(R.string.notification_summary_small), array.get(0), array.get(1)); } return null; } @Nullable private static String titleForType(Context context, Notification notification) { switch (notification.type) { case MENTION: return String.format(context.getString(R.string.notification_mention_format), notification.account.getDisplayName()); case FOLLOW: return String.format(context.getString(R.string.notification_follow_format), notification.account.getDisplayName()); case FAVOURITE: return String.format(context.getString(R.string.notification_favourite_format), notification.account.getDisplayName()); case REBLOG: return String.format(context.getString(R.string.notification_reblog_format), notification.account.getDisplayName()); } return null; } @Nullable private static String bodyForType(Notification notification) { switch (notification.type) { case FOLLOW: return notification.account.username; case MENTION: case FAVOURITE: case REBLOG: return notification.status.content.toString(); } return null; } }