Add use of PendingIntent.getForegroundService()

In particular, we have an example of a foreground-service PendingIntent
triggered by a 15-second delayed alarm following a button click.  This
is enough time to exercise use cases like swiping the app out of recents
before the alarm fires, therefore entering the "starting a fg service
when the app is not in a fg state" flows.

Bug: 73559697
Test: this is it
Change-Id: If57908ab852c7a0bfab7bb1da8eda0a47493fc6b

3 files changed, 31 insertions, 0 deletions

diff --git a/samples/ApiDemos/res/layout/foreground_service_controller.xml b/samples/ApiDemos/res/layout/foreground_service_controller.xml
index f2a62741a..bf15fef07 100644
--- a/samples/ApiDemos/res/layout/foreground_service_controller.xml
+++ b/samples/ApiDemos/res/layout/foreground_service_controller.xml
@@ -60,6 +60,12 @@
             android:text="@string/start_service_foreground_2">
     </Button>
 
+    <Button android:id="@+id/start_foreground_2_alarm"
+            android:layout_width="wrap_content" android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/start_service_foreground_2_alarm">
+    </Button>
+
     <Button android:id="@+id/stop_2"
             android:layout_width="wrap_content" android:layout_height="wrap_content"
             android:text="@string/stop_service_2">
diff --git a/samples/ApiDemos/res/values/strings.xml b/samples/ApiDemos/res/values/strings.xml
index 59f2fe96e..4717a40cf 100644
--- a/samples/ApiDemos/res/values/strings.xml
+++ b/samples/ApiDemos/res/values/strings.xml
@@ -332,6 +332,7 @@
     <string name="start_service_background">Start Service Background</string>
     <string name="start_service_background_wakelock">Start Service Background w/Wakelock</string>
     <string name="start_service_foreground_2">Start Service Foreground 2</string>
+    <string name="start_service_foreground_2_alarm">Start Service Foreground 2 Via Alarm</string>
 
     <string name="activity_isolated_service_controller">App/Service/Isolated Service Controller</string>
     <string name="isolated_service_controller">This demonstrates the use of android:isolatedProcess
diff --git a/samples/ApiDemos/src/com/example/android/apis/app/ForegroundService.java b/samples/ApiDemos/src/com/example/android/apis/app/ForegroundService.java
index 8d34b0c9f..bc1b46f0f 100644
--- a/samples/ApiDemos/src/com/example/android/apis/app/ForegroundService.java
+++ b/samples/ApiDemos/src/com/example/android/apis/app/ForegroundService.java
@@ -17,15 +17,18 @@
 package com.example.android.apis.app;
 
 import android.app.Activity;
+import android.app.AlarmManager;
 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.os.Bundle;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.PowerManager;
+import android.os.SystemClock;
 import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -34,6 +37,9 @@ import android.widget.Button;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 
+
+
+
 // Need the following import to get access to the app resources, since this
 // class is in a sub-package.
 import com.example.android.apis.R;
@@ -168,6 +174,8 @@ public class ForegroundService extends Service {
             button.setOnClickListener(mForegroundListener2);
             button = (Button)findViewById(R.id.stop_2);
             button.setOnClickListener(mStopListener2);
+            button = (Button)findViewById(R.id.start_foreground_2_alarm);
+            button.setOnClickListener(mForegroundAlarmListener);
         }
 
         private OnClickListener mForegroundListener = new OnClickListener() {
@@ -217,6 +225,22 @@ public class ForegroundService extends Service {
             }
         };
 
+        private OnClickListener mForegroundAlarmListener = new OnClickListener() {
+            public void onClick(View v) {
+                final Context ctx = Controller.this;
+
+                final Intent intent = new Intent(ForegroundService.ACTION_FOREGROUND);
+                intent.setClass(ctx, ForegroundService2.class);
+
+                PendingIntent pi = PendingIntent.getForegroundService(ctx, 0, intent, 0);
+                AlarmManager am = (AlarmManager) ctx.getSystemService(Context.ALARM_SERVICE);
+                am.setExact(AlarmManager.ELAPSED_REALTIME,
+                        SystemClock.elapsedRealtime() + 15_000,
+                        pi);
+                Log.i("ForegroundService", "Starting service in 15 seconds");
+            }
+        };
+
         private OnClickListener mStopListener2 = new OnClickListener() {
             public void onClick(View v) {
                 stopService(new Intent(Controller.this,