From 0366d14fb8b1cfad20a016ecb0ae714a41419d33 Mon Sep 17 00:00:00 2001
From: Jim Miller <jaggies@google.com>
Date: Sun, 29 Sep 2013 14:04:40 -0700
Subject: [PATCH] Disable keyguard widgets on low memory devices

Fixes bug 10784493

Change-Id: Idc1c35faf0715814fa1a257319888945c82527c6
---
 .../android/settings/SecuritySettings.java    | 25 +++++++++++++------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/src/com/android/settings/SecuritySettings.java b/src/com/android/settings/SecuritySettings.java
index f36540356f4..e0022649484 100644
--- a/src/com/android/settings/SecuritySettings.java
+++ b/src/com/android/settings/SecuritySettings.java
@@ -20,6 +20,7 @@ package com.android.settings;
 import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
 
 import android.app.Activity;
+import android.app.ActivityManager;
 import android.app.AlertDialog;
 import android.app.admin.DevicePolicyManager;
 import android.content.Context;
@@ -244,15 +245,25 @@ public class SecuritySettings extends RestrictedSettingsFragment
         // Enable or disable keyguard widget checkbox based on DPM state
         mEnableKeyguardWidgets = (CheckBoxPreference) root.findPreference(KEY_ENABLE_WIDGETS);
         if (mEnableKeyguardWidgets != null) {
-            final boolean disabled = (0 != (mDPM.getKeyguardDisabledFeatures(null)
-                    & DevicePolicyManager.KEYGUARD_DISABLE_WIDGETS_ALL));
-            if (disabled) {
-                mEnableKeyguardWidgets.setSummary(
-                        R.string.security_enable_widgets_disabled_summary);
+            if (ActivityManager.isLowRamDeviceStatic()) {
+                // Widgets take a lot of RAM, so disable them on low-memory devices
+                PreferenceGroup securityCategory
+                        = (PreferenceGroup) root.findPreference(KEY_SECURITY_CATEGORY);
+                if (securityCategory != null) {
+                    securityCategory.removePreference(root.findPreference(KEY_ENABLE_WIDGETS));
+                    mEnableKeyguardWidgets = null;
+                }
             } else {
-                mEnableKeyguardWidgets.setSummary("");
+                final boolean disabled = (0 != (mDPM.getKeyguardDisabledFeatures(null)
+                        & DevicePolicyManager.KEYGUARD_DISABLE_WIDGETS_ALL));
+                if (disabled) {
+                    mEnableKeyguardWidgets.setSummary(
+                            R.string.security_enable_widgets_disabled_summary);
+                } else {
+                    mEnableKeyguardWidgets.setSummary("");
+                }
+                mEnableKeyguardWidgets.setEnabled(!disabled);
             }
-            mEnableKeyguardWidgets.setEnabled(!disabled);
         }
 
         // Show password