Lecture 14. Android Application Development

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1 Lecture 14 Android Application Development Notification Instructor Muhammad Owais Cell:

2 Notifications Used to notify user for events Three general forms of Notifications Toast Dialogs Status Bar Notifications

3 Toast Notifications Transitory messages that popup on the current window Automatically fade in & out of view No user interaction or response

4 Standard Toast Notifications Context context = getapplicationcontext(); CharSequence text = Message to Display"; int duration = Toast.LENGTH_SHORT; Toast toast = Toast.makeText(context, text, duration); toast.show();

5 Custom Toast Notifications <LinearLayout xmlns:android=" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="10dp" android:background="#7777" > <ImageView android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_marginright="10dp" /> <TextView android:layout_width="wrap_content" android:layout_height="fill_parent" android:textcolor="#fff" android:text="i'm Watching You!" /> </LinearLayout>

6 Custom Toast Notifications public class NotificationToastActivity extends Activity public void oncreate(bundle savedinstancestate) { LayoutInflater inflater = getlayoutinflater(); View layout = inflater.inflate(r.layout.custom_toast, (ViewGroup)findViewById( R.id.toast_layout_root)); Toast toast = new Toast(getApplicationContext()); toast.setgravity(gravity.center_vertical, 0, 0); toast.setduration(toast.length_long); toast.setview(layout); toast.show(); }

7 Custom Toast Notifications Example

8 Status Bar Notifications

9 Notification Manager System service that manages Notifications e.g., notify & cancel

10 Adding Light Notification To use the user's default lighting notification.defaults = Notification.DEFAULT_LIGHTS; To use a different lighting notification.ledargb = 0xff00ff00; notification.ledonms = 300; notification.flags = Notification.FLAG_SHOW_LIGHTS;

11 Adding Sound and Vibration Notification To use the user's default sound notification.defaults = Notification.DEFAULT_SOUND; To use a different sound notification.sound = Uri.parse("file:///sdcard/media/audio/notifications/roo ster_2.mp3"); To use the user's default vibration pattern notification.defaults = Notification.DEFAULT_VIBRATE; To use a different vibration pattern long[] vibrate = { 0, 100, 200, 300 }; notification.vibrate = vibrate;

12 Remote View <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#7777" android:padding="3dp" > <ImageView android:layout_width="44dp" android:layout_height="44dp" android:layout_marginright="10dp" android:contentdescription="pic" /> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:textcolor="#fff" android:textsize="24sp" /> </LinearLayout>

13 Creating Notifications public class MainActivity extends Activity { // Notification ID to allow for future updates private static final int MY_NOTIFICATION_ID = 1; // Notification count private int mnotificationcount; // Notification Text Elements private final CharSequence tickertext = "This is Really, Really, Super Long Notification Message"; private final CharSequence contenttitle = "Notification"; private final CharSequence contenttext = "You've Been Notified"; // Notification Action Elements private Intent mnotificationintent; private PendingIntent mcontentintent; // Notification Sound and Vibration on Arrival private Uri sounduri = Uri.parse("android.resource:// com.samd.notificationstatusbar/" + R.raw.alarm_rooster); private long[] mvibratepattern = {0,200,200,300}; RemoteViews mcontentviews = new RemoteViews( "com.samd.notificationstatusbar", R.layout.notificationview);

14 Creating Notifications protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); mnotificationintent = new Intent(getApplicationContext(), NotificationActivity.class ); mcontentintent = PendingIntent.getActivity( getapplicationcontext(), 0, mnotificationintent, Intent.FLAG_ACTIVITY_NEW_TASK); final Button btn = (Button)findViewById(R.id.notify); btn.setonclicklistener(new OnClickListener() {

15 Creating Notifications public void onclick(view arg0) { mcontentviews.settextviewtext(r.id.text, contenttext + "(" + ++mnotificationcount + ")"); // Build the Notification Notification.Builder notificationbuilder = new Notification.Builder(getApplicationContext()).setTicker(tickerText).setSmallIcon(R.drawable.samllnotification).setAutoCancel(true).setContentIntent(mContentIntent).setSound(soundURI).setVibrate(mVibratePattern).setContent(mContentViews); // Pass the Notification to the NotificationManager NotificationManager mnotificationmanager = (NotificationManager) getsystemservice(context.notification_service); mnotificationmanager.notify(my_notification_id, notificationbuilder.build()); } });

16 Questions?

Android Notification

Android Notification Notification A notification is a message you can display to the user outside of your application's normal UI. appears as an icon in the notification area. the notification drawer shows