From 45a2c163c3870242ed60b5e025d505c967c2b0cb Mon Sep 17 00:00:00 2001
From: Tao Bao <tbao@google.com>
Date: Mon, 15 Feb 2016 20:03:22 -0800
Subject: [PATCH] Add a Developer option of "Disable automatic update".

For devices using A/B update or update-on-boot feature, we need a
Developer option to prevent the system updates from being installed
automatically.

We store the "disabled" status internally to turn on the automatic
update by default. But we show the opposite "enabled" status on screen
based on UX comments.

Bug: 27193001
Change-Id: I36a08a2a08fd1ba0f8f3c4b3ae5a08dc50829cd2
---
 res/values/strings.xml                        |  3 +++
 res/xml/development_prefs.xml                 |  4 +++
 .../android/settings/DevelopmentSettings.java | 26 +++++++++++++++++++
 3 files changed, 33 insertions(+)

diff --git a/res/values/strings.xml b/res/values/strings.xml
index 0e7ca629610..b777bb2e6af 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -7001,6 +7001,9 @@
     <!-- Toast message letting the user know the color temperature setting is not immediate -->
     <string name="color_temperature_toast">To apply color change, turn off screen</string>
 
+    <!-- Name of the setting to disable the automatic update -->
+    <string name="ota_disable_automatic_update">Automatic system updates</string>
+
     <!-- Label for category for data usage [CHAR LIMIT=30] -->
     <string name="usage">Usage</string>
 
diff --git a/res/xml/development_prefs.xml b/res/xml/development_prefs.xml
index 3b3dafeba10..3556843a8d9 100644
--- a/res/xml/development_prefs.xml
+++ b/res/xml/development_prefs.xml
@@ -89,6 +89,10 @@
         android:title="@string/color_temperature"
         android:summary="@string/color_temperature_desc" />
 
+    <SwitchPreference
+        android:key="ota_disable_automatic_update"
+        android:title="@string/ota_disable_automatic_update" />
+
     <PreferenceCategory android:key="debug_debugging_category"
             android:title="@string/debug_debugging_category">
 
diff --git a/src/com/android/settings/DevelopmentSettings.java b/src/com/android/settings/DevelopmentSettings.java
index af38ad09671..f5801adc1d6 100644
--- a/src/com/android/settings/DevelopmentSettings.java
+++ b/src/com/android/settings/DevelopmentSettings.java
@@ -205,6 +205,8 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
     private static final String KEY_NIGHT_MODE = "night_mode";
     private static final String KEY_CONVERT_FBE = "convert_to_file_encryption";
 
+    private static final String OTA_DISABLE_AUTOMATIC_UPDATE_KEY = "ota_disable_automatic_update";
+
     private static final int RESULT_DEBUG_APP = 1000;
     private static final int RESULT_MOCK_LOCATION_APP = 1001;
 
@@ -252,6 +254,7 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
     private SwitchPreference mLegacyDhcpClient;
     private SwitchPreference mMobileDataAlwaysOn;
     private SwitchPreference mBluetoothDisableAbsVolume;
+    private SwitchPreference mOtaDisableAutomaticUpdate;
 
     private SwitchPreference mWifiAllowScansWithTraffic;
     private SwitchPreference mStrictMode;
@@ -465,6 +468,8 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
             removePreference(KEY_CONVERT_FBE);
         }
 
+        mOtaDisableAutomaticUpdate = findAndInitSwitchPref(OTA_DISABLE_AUTOMATIC_UPDATE_KEY);
+
         mNightModePreference = (DropDownPreference) findPreference(KEY_NIGHT_MODE);
         final UiModeManager uiManager = (UiModeManager) getSystemService(
                 Context.UI_MODE_SERVICE);
@@ -698,6 +703,7 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
         updateAppProcessLimitOptions();
         updateShowAllANRsOptions();
         updateVerifyAppsOverUsbOptions();
+        updateOtaDisableAutomaticUpdateOptions();
         updateBugreportOptions();
         updateForceRtlOptions();
         updateLogdSizeValues();
@@ -949,6 +955,24 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
                 mVerifyAppsOverUsb.isChecked() ? 1 : 0);
     }
 
+    private void updateOtaDisableAutomaticUpdateOptions() {
+        // We use the "disabled status" in code, but show the opposite text
+        // "Automatic system updates" on screen. So a value 0 indicates the
+        // automatic update is enabled.
+        updateSwitchPreference(mOtaDisableAutomaticUpdate, Settings.Global.getInt(
+                getActivity().getContentResolver(),
+                Settings.Global.OTA_DISABLE_AUTOMATIC_UPDATE, 0) != 1);
+    }
+
+    private void writeOtaDisableAutomaticUpdateOptions() {
+        // We use the "disabled status" in code, but show the opposite text
+        // "Automatic system updates" on screen. So a value 0 indicates the
+        // automatic update is enabled.
+        Settings.Global.putInt(getActivity().getContentResolver(),
+                Settings.Global.OTA_DISABLE_AUTOMATIC_UPDATE,
+                mOtaDisableAutomaticUpdate.isChecked() ? 0 : 1);
+    }
+
     private boolean enableVerifierSetting() {
         final ContentResolver cr = getActivity().getContentResolver();
         if (Settings.Global.getInt(cr, Settings.Global.ADB_ENABLED, 0) == 0) {
@@ -1850,6 +1874,8 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
             writeDebuggerOptions();
         } else if (preference == mVerifyAppsOverUsb) {
             writeVerifyAppsOverUsbOptions();
+        } else if (preference == mOtaDisableAutomaticUpdate) {
+            writeOtaDisableAutomaticUpdateOptions();
         } else if (preference == mStrictMode) {
             writeStrictModeVisualOptions();
         } else if (preference == mPointerLocation) {