Ongoing notification for GPS use.

This change improves upon the notification priority API
introduced in change I9e738cc4, allowing privileged clients
to set the priority of a notification when posting it
directly to INotificationManager. StatusBarTest is updated
to test this new feature.

The new LocationController in SystemUI uses this facility to
post a high-priority ongoing notification whenever GPS is in
use (replacing the functionality of the legacy GPS status
bar icon).

Also happens to fix http://b/3325472 (adding a log message
when notifications are dropped because of a missing icon).

Bug: 3412807

Change-Id: I523016ffa53bf979be98ddc4a2deb55a6270c68a

4 files changed, 129 insertions, 0 deletions

diff --git a/packages/SystemUI/res/values-es-rUS-xlarge/strings.xml b/packages/SystemUI/res/values-es-rUS-xlarge/strings.xml
index 00b951e..7ba493d 100644
--- a/packages/SystemUI/res/values-es-rUS-xlarge/strings.xml
+++ b/packages/SystemUI/res/values-es-rUS-xlarge/strings.xml
@@ -22,4 +22,10 @@
     <string name="status_bar_clear_all_button" msgid="4722520806446512408">"Eliminar todos"</string>
     <string name="status_bar_settings_signal_meter_disconnected" msgid="4684094636492991496">"Sin conexión a Int."</string>
     <string name="status_bar_settings_signal_meter_wifi_nossid" msgid="1456658018593445677">"WiFi conectado"</string>
+
+    <!-- manually translated -->
+    <string name="gps_notification_searching_text">Buscando señal de GPS</string>
+
+    <!-- manually translated -->
+    <string name="gps_notification_found_text">Ubicación establecida por el GPS</string>
 </resources>
diff --git a/packages/SystemUI/res/values-xlarge/strings.xml b/packages/SystemUI/res/values-xlarge/strings.xml
index f7b642d..dfd5851 100644
--- a/packages/SystemUI/res/values-xlarge/strings.xml
+++ b/packages/SystemUI/res/values-xlarge/strings.xml
@@ -38,4 +38,9 @@
     <!-- Separator for PLMN and SPN in network name. -->
     <string name="status_bar_network_name_separator" translatable="false">" – "</string>
 
+    <!-- Notification text: when GPS is getting a fix [CHAR LIMIT=50] -->
+    <string name="gps_notification_searching_text">Searching for GPS</string>
+
+    <!-- Notification text: when GPS has found a fix [CHAR LIMIT=50] -->
+    <string name="gps_notification_found_text">Location set by GPS</string>
 </resources>
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/LocationController.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/LocationController.java
new file mode 100644
index 0000000..76c05d2
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/LocationController.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * 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 com.android.systemui.statusbar.policy;
+
+import java.util.ArrayList;
+
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.location.LocationManager;
+import android.util.Slog;
+import android.view.View;
+import android.widget.ImageView;
+
+// private NM API
+import android.app.INotificationManager;
+import com.android.internal.statusbar.StatusBarNotification;
+
+import com.android.systemui.R;
+
+public class LocationController extends BroadcastReceiver {
+    private static final String TAG = "StatusBar.LocationController";
+
+    private static final int GPS_NOTIFICATION_ID = 374203-122084;
+
+    private Context mContext;
+
+    private INotificationManager mNotificationService;
+
+    public LocationController(Context context) {
+        mContext = context;
+
+        IntentFilter filter = new IntentFilter();
+        filter.addAction(LocationManager.GPS_ENABLED_CHANGE_ACTION);
+        filter.addAction(LocationManager.GPS_FIX_CHANGE_ACTION);
+        context.registerReceiver(this, filter);
+
+        NotificationManager nm = (NotificationManager)context.getSystemService(
+                Context.NOTIFICATION_SERVICE);
+        mNotificationService = nm.getService();
+    }
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        final String action = intent.getAction();
+        final boolean enabled = intent.getBooleanExtra(LocationManager.EXTRA_GPS_ENABLED, false);
+
+        boolean visible;
+        int iconId, textResId;
+
+        if (action.equals(LocationManager.GPS_FIX_CHANGE_ACTION) && enabled) {
+            // GPS is getting fixes
+            iconId = com.android.internal.R.drawable.stat_sys_gps_on;
+            textResId = R.string.gps_notification_found_text;
+            visible = true;
+        } else if (action.equals(LocationManager.GPS_ENABLED_CHANGE_ACTION) && !enabled) {
+            // GPS is off
+            visible = false;
+            iconId = textResId = 0;
+        } else {
+            // GPS is on, but not receiving fixes
+            iconId = R.drawable.stat_sys_gps_acquiring_anim;
+            textResId = R.string.gps_notification_searching_text;
+            visible = true;
+        }
+        
+        try {
+            if (visible) {
+                Notification n = new Notification.Builder(mContext)
+                    .setSmallIcon(iconId)
+                    .setContentTitle(mContext.getText(textResId))
+                    .setOngoing(true)
+                    .getNotification();
+
+                // Notification.Builder will helpfully fill these out for you no matter what you do
+                n.tickerView = null;
+                n.tickerText = null;
+
+                int[] idOut = new int[1];
+                mNotificationService.enqueueNotificationWithTagPriority(
+                        mContext.getPackageName(),
+                        null, 
+                        GPS_NOTIFICATION_ID, 
+                        StatusBarNotification.PRIORITY_SYSTEM, // !!!1!one!!!
+                        n,
+                        idOut);
+            } else {
+                mNotificationService.cancelNotification(
+                        mContext.getPackageName(),
+                        GPS_NOTIFICATION_ID);
+            }
+        } catch (android.os.RemoteException ex) {
+            // well, it was worth a shot
+        }
+    }
+}
+
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java
index 4bac07f..7a13fde 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java
@@ -65,6 +65,7 @@ import com.android.systemui.R;
 import com.android.systemui.statusbar.*;
 import com.android.systemui.statusbar.policy.BatteryController;
 import com.android.systemui.statusbar.policy.BluetoothController;
+import com.android.systemui.statusbar.policy.LocationController;
 import com.android.systemui.statusbar.policy.NetworkController;
 import com.android.systemui.recent.RecentApplicationsActivity;
 
@@ -135,6 +136,7 @@ public class TabletStatusBar extends StatusBar implements
     HeightReceiver mHeightReceiver;
     BatteryController mBatteryController;
     BluetoothController mBluetoothController;
+    LocationController mLocationController;
     NetworkController mNetworkController;
 
     View mBarContents;
@@ -359,6 +361,8 @@ public class TabletStatusBar extends StatusBar implements
         mTicker = new TabletTicker(this);
 
         // The icons
+        mLocationController = new LocationController(mContext); // will post a notification
+
         mBatteryController = new BatteryController(mContext);
         mBatteryController.addIconView((ImageView)sb.findViewById(R.id.battery));
         mBluetoothController = new BluetoothController(mContext);