Add support for user-selectable dark/light theme

Updates Settings to use the DayNight theme (real name TBD) and fixes
several colors that were pinned to non-theme values. Adds a setting for
switching theme between light/dark/auto.

Bug: 19368658
Bug: 19369392
Change-Id: I7cd23b7ad38bdb25a01b92e67ff1ee1cdd8a3958

1 files changed, 20 insertions, 0 deletions

diff --git a/src/com/android/settings/DisplaySettings.java b/src/com/android/settings/DisplaySettings.java
index ddd6728..337ec23 100644
--- a/src/com/android/settings/DisplaySettings.java
+++ b/src/com/android/settings/DisplaySettings.java
@@ -32,6 +32,7 @@ import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
 import android.app.Activity;
 import android.app.ActivityManagerNative;
 import android.app.Dialog;
+import android.app.UiModeManager;
 import android.app.admin.DevicePolicyManager;
 import android.content.ContentResolver;
 import android.content.Context;
@@ -70,6 +71,7 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
     private static final String KEY_DOZE = "doze";
     private static final String KEY_AUTO_BRIGHTNESS = "auto_brightness";
     private static final String KEY_AUTO_ROTATE = "auto_rotate";
+    private static final String KEY_NIGHT_MODE = "night_mode";
 
     private static final int DLG_GLOBAL_CHANGE_WARNING = 1;
 
@@ -78,6 +80,7 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
     private final Configuration mCurConfig = new Configuration();
 
     private ListPreference mScreenTimeoutPreference;
+    private ListPreference mNightModePreference;
     private Preference mScreenSaverPreference;
     private SwitchPreference mLiftToWakePreference;
     private SwitchPreference mDozePreference;
@@ -165,6 +168,13 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
         } else {
             removePreference(KEY_AUTO_ROTATE);
         }
+
+        mNightModePreference = (ListPreference) findPreference(KEY_NIGHT_MODE);
+        final UiModeManager uiManager = (UiModeManager) getSystemService(
+                Context.UI_MODE_SERVICE);
+        final int currentNightMode = uiManager.getNightMode();
+        mNightModePreference.setValue(String.valueOf(currentNightMode));
+        mNightModePreference.setOnPreferenceChangeListener(this);
     }
 
     private static boolean allowAllRotations(Context context) {
@@ -381,6 +391,16 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
             boolean value = (Boolean) objValue;
             Settings.Secure.putInt(getContentResolver(), DOZE_ENABLED, value ? 1 : 0);
         }
+        if (preference == mNightModePreference) {
+            try {
+                final int value = Integer.parseInt((String) objValue);
+                final UiModeManager uiManager = (UiModeManager) getSystemService(
+                        Context.UI_MODE_SERVICE);
+                uiManager.setNightMode(value);
+            } catch (NumberFormatException e) {
+                Log.e(TAG, "could not persist night mode setting", e);
+            }
+        }
         return true;
     }