Java tutorial
/* * ConnectBot: simple, powerful, open-source SSH client for Android * Copyright 2010 Kenny Root, Jeffrey Sharkey * * 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 org.connectbot.service; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import org.connectbot.ConsoleActivity; import org.connectbot.HostListActivity; import org.connectbot.R; import org.connectbot.bean.HostBean; import org.connectbot.util.HostDatabase; import org.connectbot.util.PreferenceConstants; import android.annotation.TargetApi; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.graphics.Color; import android.support.v4.app.NotificationCompat; /** * @author Kenny Root * * Based on the concept from jasta's blog post. */ public abstract class ConnectionNotifier { private static final int ONLINE_NOTIFICATION = 1; private static final int ACTIVITY_NOTIFICATION = 2; private static final int ONLINE_DISCONNECT_NOTIFICATION = 3; public static ConnectionNotifier getInstance() { if (PreferenceConstants.PRE_ECLAIR) return PreEclair.Holder.sInstance; else return EclairAndBeyond.Holder.sInstance; } protected NotificationManager getNotificationManager(Context context) { return (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); } protected NotificationCompat.Builder newNotificationBuilder(Context context) { NotificationCompat.Builder builder = new NotificationCompat.Builder(context) .setSmallIcon(R.drawable.notification_icon).setWhen(System.currentTimeMillis()); return builder; } protected Notification newActivityNotification(Context context, HostBean host) { NotificationCompat.Builder builder = newNotificationBuilder(context); Resources res = context.getResources(); String contentText = res.getString(R.string.notification_text, host.getNickname()); Intent notificationIntent = new Intent(context, ConsoleActivity.class); notificationIntent.setAction("android.intent.action.VIEW"); notificationIntent.setData(host.getUri()); PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0); builder.setContentTitle(res.getString(R.string.app_name)).setContentText(contentText) .setContentIntent(contentIntent); builder.setAutoCancel(true); int ledOnMS = 300; int ledOffMS = 1000; builder.setDefaults(Notification.DEFAULT_LIGHTS); if (HostDatabase.COLOR_RED.equals(host.getColor())) builder.setLights(Color.RED, ledOnMS, ledOffMS); else if (HostDatabase.COLOR_GREEN.equals(host.getColor())) builder.setLights(Color.GREEN, ledOnMS, ledOffMS); else if (HostDatabase.COLOR_BLUE.equals(host.getColor())) builder.setLights(Color.BLUE, ledOnMS, ledOffMS); else builder.setLights(Color.WHITE, ledOnMS, ledOffMS); return builder.build(); } protected Notification newRunningNotification(Context context) { NotificationCompat.Builder builder = newNotificationBuilder(context); builder.setOngoing(true); builder.setWhen(0); builder.setContentIntent(PendingIntent.getActivity(context, ONLINE_NOTIFICATION, new Intent(context, ConsoleActivity.class), 0)); Resources res = context.getResources(); builder.setContentTitle(res.getString(R.string.app_name)); builder.setContentText(res.getString(R.string.app_is_running)); Intent disconnectIntent = new Intent(context, HostListActivity.class); disconnectIntent.setAction(HostListActivity.DISCONNECT_ACTION); builder.addAction(android.R.drawable.ic_menu_close_clear_cancel, res.getString(R.string.list_host_disconnect), PendingIntent.getActivity(context, ONLINE_DISCONNECT_NOTIFICATION, disconnectIntent, 0)); return builder.build(); } public void showActivityNotification(Service context, HostBean host) { getNotificationManager(context).notify(ACTIVITY_NOTIFICATION, newActivityNotification(context, host)); } public void hideActivityNotification(Service context) { getNotificationManager(context).cancel(ACTIVITY_NOTIFICATION); } public abstract void showRunningNotification(Service context); public abstract void hideRunningNotification(Service context); private static class PreEclair extends ConnectionNotifier { private static final Class<?>[] setForegroundSignature = new Class[] { boolean.class }; private Method setForeground = null; private static class Holder { private static final PreEclair sInstance = new PreEclair(); } public PreEclair() { try { setForeground = Service.class.getMethod("setForeground", setForegroundSignature); } catch (Exception e) { } } @Override public void showRunningNotification(Service context) { if (setForeground != null) { Object[] setForegroundArgs = new Object[1]; setForegroundArgs[0] = Boolean.TRUE; try { setForeground.invoke(context, setForegroundArgs); } catch (InvocationTargetException e) { } catch (IllegalAccessException e) { } getNotificationManager(context).notify(ONLINE_NOTIFICATION, newRunningNotification(context)); } } @Override public void hideRunningNotification(Service context) { if (setForeground != null) { Object[] setForegroundArgs = new Object[1]; setForegroundArgs[0] = Boolean.FALSE; try { setForeground.invoke(context, setForegroundArgs); } catch (InvocationTargetException e) { } catch (IllegalAccessException e) { } getNotificationManager(context).cancel(ONLINE_NOTIFICATION); } } } @TargetApi(5) private static class EclairAndBeyond extends ConnectionNotifier { private static class Holder { private static final EclairAndBeyond sInstance = new EclairAndBeyond(); } @Override public void showRunningNotification(Service context) { context.startForeground(ONLINE_NOTIFICATION, newRunningNotification(context)); } @Override public void hideRunningNotification(Service context) { context.stopForeground(true); } } }