Add while-idle alarm support to apidemos

Test: Manual test
Bug: 72124522
Change-Id: I9d0c0ed4b6a045e4f8f566c4e9844290e850e2fc

samples/ApiDemos/res/layout/alarm_controller.xml

@@ -33,6 +33,12 @@
         <requestFocus />
     </Button>
 
+    <Button android:id="@+id/one_shot_while_idle"
+        android:layout_width="wrap_content" android:layout_height="wrap_content"
+        android:text="@string/one_shot_while_idle_alarm">
+        <requestFocus />
+    </Button>
+
     <Button android:id="@+id/start_repeating"
         android:layout_width="wrap_content" android:layout_height="wrap_content" 
         android:text="@string/start_repeating_alarm" />

samples/ApiDemos/res/values/strings.xml

@@ -348,6 +348,7 @@
     <string name="alarm_controller">This demonstrates how to schedule and handle
         one-shot and repeating alarms.</string>
     <string name="one_shot_alarm">One Shot Alarm</string>
+    <string name="one_shot_while_idle_alarm">One Shot While-Idle Alarm</string>
     <string name="start_repeating_alarm">Start Repeating Alarm</string>
     <string name="stop_repeating_alarm">Stop Repeating Alarm</string>
     <string name="one_shot_scheduled">One-shot alarm will go off in 30 seconds based on

samples/ApiDemos/src/com/example/android/apis/app/AlarmController.java

@@ -63,6 +63,8 @@ App/Service/Alarm Controller
 </table>
 
  */
+// Start with:
+// adb shell am start com.example.android.apis/.app.AlarmController
 public class AlarmController extends Activity {
     Toast mToast;
 
@@ -75,6 +77,8 @@ public class AlarmController extends Activity {
         // Watch for button clicks.
         Button button = (Button)findViewById(R.id.one_shot);
         button.setOnClickListener(mOneShotListener);
+        button = (Button)findViewById(R.id.one_shot_while_idle);
+        button.setOnClickListener(mOneShotListener);
         button = (Button)findViewById(R.id.start_repeating);
         button.setOnClickListener(mStartRepeatingListener);
         button = (Button)findViewById(R.id.stop_repeating);
@@ -99,7 +103,16 @@ public class AlarmController extends Activity {
 
             // Schedule the alarm!
             AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
+
+            switch (v.getId()) {
+                case R.id.one_shot:
                     am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);
+                    break;
+                default:
+                    am.setExactAndAllowWhileIdle(
+                            AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);
+                    break;
+            }
 
             // Tell the user about what we did.
             if (mToast != null) {