add a setting for the heads up: app part

Bug: 13208692
Depends-On: I6847f7a5f275aee2f608de0237dab0e45c39b33f
Change-Id: Ia410a473492aa7637449ba5a5dc068f98618ad03

res/values/strings.xml

@@ -1753,6 +1753,10 @@
     <string name="notification_sound_title">Default notification sound</string>
     <!-- Sound settings screen, notification light repeat pulsing title -->
     <string name="notification_pulse_title">Pulse notification light</string>
+    <!-- Display settings screen, notification popups are enabled [CHAR LIMIT=30] -->
+    <string name="heads_up_enabled_title">Heads Up Notifications</string>
+    <!-- Display settings screen, notification popups are explained [CHAR LIMIT=45]-->
+    <string name="heads_up_enabled_summary">Important notifications will pop up</string>
     <!-- Sound settings screen, the title of the volume bar to adjust the incoming call volume -->
     <string name="incoming_call_volume_title">Ringtone</string>
     <!-- Sound settings screen, the title of the volume bar to adjust the notification volume -->

res/xml/display_settings.xml

@@ -53,6 +53,12 @@
             android:title="@string/notification_pulse_title"
             android:persistent="false" />
 
+        <CheckBoxPreference
+            android:key="heads_up"
+            android:title="@string/heads_up_enabled_title"
+            android:summary="@string/heads_up_enabled_summary"
+            android:persistent="false" />
+
         <PreferenceScreen
                 android:key="wifi_display"
                 android:title="@string/wifi_display_settings_title"

src/com/android/settings/DisplaySettings.java

@@ -25,7 +25,9 @@ import android.content.ContentResolver;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
+import android.database.ContentObserver;
 import android.os.Bundle;
+import android.os.Handler;
 import android.os.RemoteException;
 import android.preference.CheckBoxPreference;
 import android.preference.ListPreference;
@@ -51,6 +53,7 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
     private static final String KEY_SCREEN_TIMEOUT = "screen_timeout";
     private static final String KEY_FONT_SIZE = "font_size";
     private static final String KEY_NOTIFICATION_PULSE = "notification_pulse";
+    private static final String KEY_HEADS_UP = "heads_up";
     private static final String KEY_SCREEN_SAVER = "screensaver";
 
     private static final int DLG_GLOBAL_CHANGE_WARNING = 1;
@@ -59,14 +62,16 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
     private CheckBoxPreference mNotificationPulse;
 
     private final Configuration mCurConfig = new Configuration();
+    private final Handler mHandler = new Handler();
 
     private ListPreference mScreenTimeoutPreference;
     private Preference mScreenSaverPreference;
+    private CheckBoxPreference mHeadsUp;
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        ContentResolver resolver = getActivity().getContentResolver();
+        final ContentResolver resolver = getActivity().getContentResolver();
 
         addPreferencesFromResource(R.xml.display_settings);
 
@@ -102,6 +107,19 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
                 Log.e(TAG, Settings.System.NOTIFICATION_LIGHT_PULSE + " not found");
             }
         }
+        mHeadsUp = (CheckBoxPreference) findPreference(KEY_HEADS_UP);
+        if (mHeadsUp != null) {
+            updateHeadsUpMode(resolver);
+            mHeadsUp.setOnPreferenceChangeListener(this);
+            resolver.registerContentObserver(
+                    Settings.Global.getUriFor(Settings.Global.HEADS_UP),
+                    false, new ContentObserver(mHandler) {
+                @Override
+                public void onChange(boolean selfChange) {
+                    updateHeadsUpMode(resolver);
+                }
+            });
+        }
     }
 
     private void updateTimeoutPreferenceDescription(long currentTimeout) {
@@ -235,6 +253,16 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
         }
     }
 
+    private void updateHeadsUpMode(ContentResolver resolver) {
+        mHeadsUp.setChecked(Settings.Global.HEADS_UP_ON == Settings.Global.getInt(resolver,
+                Settings.Global.HEADS_UP, Settings.Global.HEADS_UP_OFF));
+    }
+
+    private void setHeadsUpMode(ContentResolver resolver, boolean value) {
+        Settings.Global.putInt(resolver, Settings.Global.HEADS_UP,
+                value ? Settings.Global.HEADS_UP_ON : Settings.Global.HEADS_UP_OFF);
+    }
+
     public void writeFontSizePreference(Object objValue) {
         try {
             mCurConfig.fontScale = Float.parseFloat(objValue.toString());
@@ -252,6 +280,12 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
                     value ? 1 : 0);
             return true;
         }
+        if (preference == mHeadsUp) {
+            final boolean value = mHeadsUp.isChecked();
+            Log.d(TAG, "onPreferenceTreeClick mHeadsUp: " + value);
+            setHeadsUpMode(getContentResolver(), value);
+            return true;
+        }
         return super.onPreferenceTreeClick(preferenceScreen, preference);
     }