diff --git a/core/java/android/app/ActivityThread.java b/core/java/android/app/ActivityThread.java
index 222ad69c61e29..d9f9d61886d79 100644
--- a/core/java/android/app/ActivityThread.java
+++ b/core/java/android/app/ActivityThread.java
@@ -69,6 +69,7 @@ import android.os.SystemProperties;
 import android.os.Trace;
 import android.os.UserHandle;
 import android.util.AndroidRuntimeException;
+import android.util.ArrayMap;
 import android.util.DisplayMetrics;
 import android.util.EventLog;
 import android.util.Log;
@@ -103,8 +104,6 @@ import java.lang.ref.WeakReference;
 import java.net.InetAddress;
 import java.security.Security;
 import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -164,15 +163,15 @@ public final class ActivityThread {
     final ApplicationThread mAppThread = new ApplicationThread();
     final Looper mLooper = Looper.myLooper();
     final H mH = new H();
-    final HashMap<IBinder, ActivityClientRecord> mActivities
-            = new HashMap<IBinder, ActivityClientRecord>();
+    final ArrayMap<IBinder, ActivityClientRecord> mActivities
+            = new ArrayMap<IBinder, ActivityClientRecord>();
     // List of new activities (via ActivityRecord.nextIdle) that should
     // be reported when next we idle.
     ActivityClientRecord mNewActivities = null;
     // Number of activities that are currently visible on-screen.
     int mNumVisibleActivities = 0;
-    final HashMap<IBinder, Service> mServices
-            = new HashMap<IBinder, Service>();
+    final ArrayMap<IBinder, Service> mServices
+            = new ArrayMap<IBinder, Service>();
     AppBindData mBoundApplication;
     Profiler mProfiler;
     int mCurDefaultDisplayDpi;
@@ -183,7 +182,7 @@ public final class ActivityThread {
     final ArrayList<Application> mAllApplications
             = new ArrayList<Application>();
     // set of instantiated backup agents, keyed by package name
-    final HashMap<String, BackupAgent> mBackupAgents = new HashMap<String, BackupAgent>();
+    final ArrayMap<String, BackupAgent> mBackupAgents = new ArrayMap<String, BackupAgent>();
     /** Reference to singleton {@link ActivityThread} */
     private static ActivityThread sCurrentActivityThread;
     Instrumentation mInstrumentation;
@@ -203,10 +202,10 @@ public final class ActivityThread {
     // which means this lock gets held while the activity and window managers
     // holds their own lock.  Thus you MUST NEVER call back into the activity manager
     // or window manager or anything that depends on them while holding this lock.
-    final HashMap<String, WeakReference<LoadedApk>> mPackages
-            = new HashMap<String, WeakReference<LoadedApk>>();
-    final HashMap<String, WeakReference<LoadedApk>> mResourcePackages
-            = new HashMap<String, WeakReference<LoadedApk>>();
+    final ArrayMap<String, WeakReference<LoadedApk>> mPackages
+            = new ArrayMap<String, WeakReference<LoadedApk>>();
+    final ArrayMap<String, WeakReference<LoadedApk>> mResourcePackages
+            = new ArrayMap<String, WeakReference<LoadedApk>>();
     final ArrayList<ActivityClientRecord> mRelaunchingActivities
             = new ArrayList<ActivityClientRecord>();
     Configuration mPendingConfiguration = null;
@@ -238,17 +237,17 @@ public final class ActivityThread {
     }
 
     // The lock of mProviderMap protects the following variables.
-    final HashMap<ProviderKey, ProviderClientRecord> mProviderMap
-        = new HashMap<ProviderKey, ProviderClientRecord>();
-    final HashMap<IBinder, ProviderRefCount> mProviderRefCountMap
-        = new HashMap<IBinder, ProviderRefCount>();
-    final HashMap<IBinder, ProviderClientRecord> mLocalProviders
-        = new HashMap<IBinder, ProviderClientRecord>();
-    final HashMap<ComponentName, ProviderClientRecord> mLocalProvidersByName
-            = new HashMap<ComponentName, ProviderClientRecord>();
+    final ArrayMap<ProviderKey, ProviderClientRecord> mProviderMap
+        = new ArrayMap<ProviderKey, ProviderClientRecord>();
+    final ArrayMap<IBinder, ProviderRefCount> mProviderRefCountMap
+        = new ArrayMap<IBinder, ProviderRefCount>();
+    final ArrayMap<IBinder, ProviderClientRecord> mLocalProviders
+        = new ArrayMap<IBinder, ProviderClientRecord>();
+    final ArrayMap<ComponentName, ProviderClientRecord> mLocalProvidersByName
+            = new ArrayMap<ComponentName, ProviderClientRecord>();
 
-    final HashMap<Activity, ArrayList<OnActivityPausedListener>> mOnPauseListeners
-        = new HashMap<Activity, ArrayList<OnActivityPausedListener>>();
+    final ArrayMap<Activity, ArrayList<OnActivityPausedListener>> mOnPauseListeners
+        = new ArrayMap<Activity, ArrayList<OnActivityPausedListener>>();
 
     final GcIdler mGcIdler = new GcIdler();
     boolean mGcIdlerScheduled = false;
@@ -3702,47 +3701,45 @@ public final class ActivityThread {
                 = new ArrayList<ComponentCallbacks2>();
 
         synchronized (mResourcesManager) {
-            final int N = mAllApplications.size();
-            for (int i=0; i<N; i++) {
+            final int NAPP = mAllApplications.size();
+            for (int i=0; i<NAPP; i++) {
                 callbacks.add(mAllApplications.get(i));
             }
-            if (mActivities.size() > 0) {
-                for (ActivityClientRecord ar : mActivities.values()) {
-                    Activity a = ar.activity;
-                    if (a != null) {
-                        Configuration thisConfig = applyConfigCompatMainThread(
-                                mCurDefaultDisplayDpi, newConfig,
-                                ar.packageInfo.getCompatibilityInfo());
-                        if (!ar.activity.mFinished && (allActivities || !ar.paused)) {
-                            // If the activity is currently resumed, its configuration
-                            // needs to change right now.
-                            callbacks.add(a);
-                        } else if (thisConfig != null) {
-                            // Otherwise, we will tell it about the change
-                            // the next time it is resumed or shown.  Note that
-                            // the activity manager may, before then, decide the
-                            // activity needs to be destroyed to handle its new
-                            // configuration.
-                            if (DEBUG_CONFIGURATION) {
-                                Slog.v(TAG, "Setting activity "
-                                        + ar.activityInfo.name + " newConfig=" + thisConfig);
-                            }
-                            ar.newConfig = thisConfig;
+            final int NACT = mActivities.size();
+            for (int i=0; i<NACT; i++) {
+                ActivityClientRecord ar = mActivities.valueAt(i);
+                Activity a = ar.activity;
+                if (a != null) {
+                    Configuration thisConfig = applyConfigCompatMainThread(
+                            mCurDefaultDisplayDpi, newConfig,
+                            ar.packageInfo.getCompatibilityInfo());
+                    if (!ar.activity.mFinished && (allActivities || !ar.paused)) {
+                        // If the activity is currently resumed, its configuration
+                        // needs to change right now.
+                        callbacks.add(a);
+                    } else if (thisConfig != null) {
+                        // Otherwise, we will tell it about the change
+                        // the next time it is resumed or shown.  Note that
+                        // the activity manager may, before then, decide the
+                        // activity needs to be destroyed to handle its new
+                        // configuration.
+                        if (DEBUG_CONFIGURATION) {
+                            Slog.v(TAG, "Setting activity "
+                                    + ar.activityInfo.name + " newConfig=" + thisConfig);
                         }
+                        ar.newConfig = thisConfig;
                     }
                 }
             }
-            if (mServices.size() > 0) {
-                for (Service service : mServices.values()) {
-                    callbacks.add(service);
-                }
+            final int NSVC = mServices.size();
+            for (int i=0; i<NSVC; i++) {
+                callbacks.add(mServices.valueAt(i));
             }
         }
         synchronized (mProviderMap) {
-            if (mLocalProviders.size() > 0) {
-                for (ProviderClientRecord providerClientRecord : mLocalProviders.values()) {
-                    callbacks.add(providerClientRecord.mLocalProvider);
-                }
+            final int NPRV = mLocalProviders.size();
+            for (int i=0; i<NPRV; i++) {
+                callbacks.add(mLocalProviders.valueAt(i).mLocalProvider);
             }
         }
 
@@ -4575,12 +4572,11 @@ public final class ActivityThread {
                 mProviderRefCountMap.remove(jBinder);
             }
 
-            Iterator<ProviderClientRecord> iter = mProviderMap.values().iterator();
-            while (iter.hasNext()) {
-                ProviderClientRecord pr = iter.next();
+            for (int i=mProviderMap.size()-1; i>=0; i--) {
+                ProviderClientRecord pr = mProviderMap.valueAt(i);
                 IBinder myBinder = pr.mProvider.asBinder();
                 if (myBinder == jBinder) {
-                    iter.remove();
+                    mProviderMap.removeAt(i);
                 }
             }
         }
diff --git a/core/java/android/app/ApplicationLoaders.java b/core/java/android/app/ApplicationLoaders.java
index a26b88cd4af06..413c3699db088 100644
--- a/core/java/android/app/ApplicationLoaders.java
+++ b/core/java/android/app/ApplicationLoaders.java
@@ -17,11 +17,9 @@
 package android.app;
 
 import android.os.Trace;
+import android.util.ArrayMap;
 import dalvik.system.PathClassLoader;
 
-import java.util.HashMap;
-import java.util.Map;
-
 class ApplicationLoaders
 {
     public static ApplicationLoaders getDefault()
@@ -71,7 +69,7 @@ class ApplicationLoaders
         }
     }
 
-    private final Map<String, ClassLoader> mLoaders = new HashMap<String, ClassLoader>();
+    private final ArrayMap<String, ClassLoader> mLoaders = new ArrayMap<String, ClassLoader>();
 
     private static final ApplicationLoaders gApplicationLoaders
         = new ApplicationLoaders();
diff --git a/core/java/android/app/ApplicationPackageManager.java b/core/java/android/app/ApplicationPackageManager.java
index 432e9b1257689..ab2739d411ac0 100644
--- a/core/java/android/app/ApplicationPackageManager.java
+++ b/core/java/android/app/ApplicationPackageManager.java
@@ -51,6 +51,7 @@ import android.net.Uri;
 import android.os.Process;
 import android.os.RemoteException;
 import android.os.UserHandle;
+import android.util.ArrayMap;
 import android.util.Log;
 import android.view.Display;
 
@@ -859,26 +860,20 @@ final class ApplicationPackageManager extends PackageManager {
             boolean needCleanup = false;
             for (String ssp : pkgList) {
                 synchronized (sSync) {
-                    if (sIconCache.size() > 0) {
-                        Iterator<ResourceName> it = sIconCache.keySet().iterator();
-                        while (it.hasNext()) {
-                            ResourceName nm = it.next();
-                            if (nm.packageName.equals(ssp)) {
-                                //Log.i(TAG, "Removing cached drawable for " + nm);
-                                it.remove();
-                                needCleanup = true;
-                            }
+                    for (int i=sIconCache.size()-1; i>=0; i--) {
+                        ResourceName nm = sIconCache.keyAt(i);
+                        if (nm.packageName.equals(ssp)) {
+                            //Log.i(TAG, "Removing cached drawable for " + nm);
+                            sIconCache.removeAt(i);
+                            needCleanup = true;
                         }
                     }
-                    if (sStringCache.size() > 0) {
-                        Iterator<ResourceName> it = sStringCache.keySet().iterator();
-                        while (it.hasNext()) {
-                            ResourceName nm = it.next();
-                            if (nm.packageName.equals(ssp)) {
-                                //Log.i(TAG, "Removing cached string for " + nm);
-                                it.remove();
-                                needCleanup = true;
-                            }
+                    for (int i=sStringCache.size()-1; i>=0; i--) {
+                        ResourceName nm = sStringCache.keyAt(i);
+                        if (nm.packageName.equals(ssp)) {
+                            //Log.i(TAG, "Removing cached string for " + nm);
+                            sStringCache.removeAt(i);
+                            needCleanup = true;
                         }
                     }
                 }
@@ -1335,8 +1330,8 @@ final class ApplicationPackageManager extends PackageManager {
     private final IPackageManager mPM;
 
     private static final Object sSync = new Object();
-    private static HashMap<ResourceName, WeakReference<Drawable.ConstantState>> sIconCache
-            = new HashMap<ResourceName, WeakReference<Drawable.ConstantState>>();
-    private static HashMap<ResourceName, WeakReference<CharSequence>> sStringCache
-            = new HashMap<ResourceName, WeakReference<CharSequence>>();
+    private static ArrayMap<ResourceName, WeakReference<Drawable.ConstantState>> sIconCache
+            = new ArrayMap<ResourceName, WeakReference<Drawable.ConstantState>>();
+    private static ArrayMap<ResourceName, WeakReference<CharSequence>> sStringCache
+            = new ArrayMap<ResourceName, WeakReference<CharSequence>>();
 }
diff --git a/core/java/android/app/LoadedApk.java b/core/java/android/app/LoadedApk.java
index 05d3a47ee98be..4239a5d8d0b76 100644
--- a/core/java/android/app/LoadedApk.java
+++ b/core/java/android/app/LoadedApk.java
@@ -16,6 +16,7 @@
 
 package android.app;
 
+import android.util.ArrayMap;
 import com.android.internal.util.ArrayUtils;
 
 import android.content.BroadcastReceiver;
@@ -49,8 +50,6 @@ import java.io.InputStream;
 import java.lang.ref.WeakReference;
 import java.net.URL;
 import java.util.Enumeration;
-import java.util.HashMap;
-import java.util.Iterator;
 
 final class IntentReceiverLeaked extends AndroidRuntimeException {
     public IntentReceiverLeaked(String msg) {
@@ -89,14 +88,14 @@ public final class LoadedApk {
     private ClassLoader mClassLoader;
     private Application mApplication;
 
-    private final HashMap<Context, HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>> mReceivers
-        = new HashMap<Context, HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>>();
-    private final HashMap<Context, HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>> mUnregisteredReceivers
-    = new HashMap<Context, HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>>();
-    private final HashMap<Context, HashMap<ServiceConnection, LoadedApk.ServiceDispatcher>> mServices
-        = new HashMap<Context, HashMap<ServiceConnection, LoadedApk.ServiceDispatcher>>();
-    private final HashMap<Context, HashMap<ServiceConnection, LoadedApk.ServiceDispatcher>> mUnboundServices
-        = new HashMap<Context, HashMap<ServiceConnection, LoadedApk.ServiceDispatcher>>();
+    private final ArrayMap<Context, ArrayMap<BroadcastReceiver, ReceiverDispatcher>> mReceivers
+        = new ArrayMap<Context, ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>>();
+    private final ArrayMap<Context, ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>> mUnregisteredReceivers
+        = new ArrayMap<Context, ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>>();
+    private final ArrayMap<Context, ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher>> mServices
+        = new ArrayMap<Context, ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher>>();
+    private final ArrayMap<Context, ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher>> mUnboundServices
+        = new ArrayMap<Context, ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher>>();
 
     int mClientCount = 0;
 
@@ -540,12 +539,11 @@ public final class LoadedApk {
     public void removeContextRegistrations(Context context,
             String who, String what) {
         final boolean reportRegistrationLeaks = StrictMode.vmRegistrationLeaksEnabled();
-        HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> rmap =
-            mReceivers.remove(context);
+        ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> rmap =
+                mReceivers.remove(context);
         if (rmap != null) {
-            Iterator<LoadedApk.ReceiverDispatcher> it = rmap.values().iterator();
-            while (it.hasNext()) {
-                LoadedApk.ReceiverDispatcher rd = it.next();
+            for (int i=0; i<rmap.size(); i++) {
+                LoadedApk.ReceiverDispatcher rd = rmap.valueAt(i);
                 IntentReceiverLeaked leak = new IntentReceiverLeaked(
                         what + " " + who + " has leaked IntentReceiver "
                         + rd.getIntentReceiver() + " that was " +
@@ -566,12 +564,11 @@ public final class LoadedApk {
         }
         mUnregisteredReceivers.remove(context);
         //Slog.i(TAG, "Receiver registrations: " + mReceivers);
-        HashMap<ServiceConnection, LoadedApk.ServiceDispatcher> smap =
+        ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher> smap =
             mServices.remove(context);
         if (smap != null) {
-            Iterator<LoadedApk.ServiceDispatcher> it = smap.values().iterator();
-            while (it.hasNext()) {
-                LoadedApk.ServiceDispatcher sd = it.next();
+            for (int i=0; i<smap.size(); i++) {
+                LoadedApk.ServiceDispatcher sd = smap.valueAt(i);
                 ServiceConnectionLeaked leak = new ServiceConnectionLeaked(
                         what + " " + who + " has leaked ServiceConnection "
                         + sd.getServiceConnection() + " that was originally bound here");
@@ -598,7 +595,7 @@ public final class LoadedApk {
             Instrumentation instrumentation, boolean registered) {
         synchronized (mReceivers) {
             LoadedApk.ReceiverDispatcher rd = null;
-            HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> map = null;
+            ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> map = null;
             if (registered) {
                 map = mReceivers.get(context);
                 if (map != null) {
@@ -610,7 +607,7 @@ public final class LoadedApk {
                         instrumentation, registered);
                 if (registered) {
                     if (map == null) {
-                        map = new HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>();
+                        map = new ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>();
                         mReceivers.put(context, map);
                     }
                     map.put(r, rd);
@@ -626,7 +623,7 @@ public final class LoadedApk {
     public IIntentReceiver forgetReceiverDispatcher(Context context,
             BroadcastReceiver r) {
         synchronized (mReceivers) {
-            HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> map = mReceivers.get(context);
+            ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> map = mReceivers.get(context);
             LoadedApk.ReceiverDispatcher rd = null;
             if (map != null) {
                 rd = map.get(r);
@@ -636,10 +633,10 @@ public final class LoadedApk {
                         mReceivers.remove(context);
                     }
                     if (r.getDebugUnregister()) {
-                        HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> holder
+                        ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> holder
                                 = mUnregisteredReceivers.get(context);
                         if (holder == null) {
-                            holder = new HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>();
+                            holder = new ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>();
                             mUnregisteredReceivers.put(context, holder);
                         }
                         RuntimeException ex = new IllegalArgumentException(
@@ -652,7 +649,7 @@ public final class LoadedApk {
                     return rd.getIIntentReceiver();
                 }
             }
-            HashMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> holder
+            ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> holder
                     = mUnregisteredReceivers.get(context);
             if (holder != null) {
                 rd = holder.get(r);
@@ -868,14 +865,14 @@ public final class LoadedApk {
             Context context, Handler handler, int flags) {
         synchronized (mServices) {
             LoadedApk.ServiceDispatcher sd = null;
-            HashMap<ServiceConnection, LoadedApk.ServiceDispatcher> map = mServices.get(context);
+            ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher> map = mServices.get(context);
             if (map != null) {
                 sd = map.get(c);
             }
             if (sd == null) {
                 sd = new ServiceDispatcher(c, context, handler, flags);
                 if (map == null) {
-                    map = new HashMap<ServiceConnection, LoadedApk.ServiceDispatcher>();
+                    map = new ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher>();
                     mServices.put(context, map);
                 }
                 map.put(c, sd);
@@ -889,7 +886,7 @@ public final class LoadedApk {
     public final IServiceConnection forgetServiceDispatcher(Context context,
             ServiceConnection c) {
         synchronized (mServices) {
-            HashMap<ServiceConnection, LoadedApk.ServiceDispatcher> map
+            ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher> map
                     = mServices.get(context);
             LoadedApk.ServiceDispatcher sd = null;
             if (map != null) {
@@ -901,10 +898,10 @@ public final class LoadedApk {
                         mServices.remove(context);
                     }
                     if ((sd.getFlags()&Context.BIND_DEBUG_UNBIND) != 0) {
-                        HashMap<ServiceConnection, LoadedApk.ServiceDispatcher> holder
+                        ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher> holder
                                 = mUnboundServices.get(context);
                         if (holder == null) {
-                            holder = new HashMap<ServiceConnection, LoadedApk.ServiceDispatcher>();
+                            holder = new ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher>();
                             mUnboundServices.put(context, holder);
                         }
                         RuntimeException ex = new IllegalArgumentException(
@@ -916,7 +913,7 @@ public final class LoadedApk {
                     return sd.getIServiceConnection();
                 }
             }
-            HashMap<ServiceConnection, LoadedApk.ServiceDispatcher> holder
+            ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher> holder
                     = mUnboundServices.get(context);
             if (holder != null) {
                 sd = holder.get(c);
@@ -969,8 +966,8 @@ public final class LoadedApk {
             }
         }
 
-        private final HashMap<ComponentName, ServiceDispatcher.ConnectionInfo> mActiveConnections
-            = new HashMap<ComponentName, ServiceDispatcher.ConnectionInfo>();
+        private final ArrayMap<ComponentName, ServiceDispatcher.ConnectionInfo> mActiveConnections
+            = new ArrayMap<ComponentName, ServiceDispatcher.ConnectionInfo>();
 
         ServiceDispatcher(ServiceConnection conn,
                 Context context, Handler activityThread, int flags) {
@@ -1000,9 +997,8 @@ public final class LoadedApk {
 
         void doForget() {
             synchronized(this) {
-                Iterator<ServiceDispatcher.ConnectionInfo> it = mActiveConnections.values().iterator();
-                while (it.hasNext()) {
-                    ServiceDispatcher.ConnectionInfo ci = it.next();
+                for (int i=0; i<mActiveConnections.size(); i++) {
+                    ServiceDispatcher.ConnectionInfo ci = mActiveConnections.valueAt(i);
                     ci.binder.unlinkToDeath(ci.deathMonitor, 0);
                 }
                 mActiveConnections.clear();
diff --git a/core/java/android/app/ResourcesManager.java b/core/java/android/app/ResourcesManager.java
index e9693dd8a9c39..f55dba4279990 100644
--- a/core/java/android/app/ResourcesManager.java
+++ b/core/java/android/app/ResourcesManager.java
@@ -18,7 +18,6 @@ package android.app;
 
 import static android.app.ActivityThread.DEBUG_CONFIGURATION;
 
-import android.app.ApplicationPackageManager;
 import android.content.pm.ActivityInfo;
 import android.content.res.AssetManager;
 import android.content.res.CompatibilityInfo;
@@ -34,10 +33,7 @@ import android.view.Display;
 import android.view.DisplayAdjustments;
 
 import java.lang.ref.WeakReference;
-import java.util.HashMap;
-import java.util.Iterator;
 import java.util.Locale;
-import java.util.Map;
 
 /** @hide */
 public class ResourcesManager {
@@ -46,8 +42,8 @@ public class ResourcesManager {
     static final boolean DEBUG_STATS = true;
 
     private static ResourcesManager sResourcesManager;
-    final HashMap<ResourcesKey, WeakReference<Resources> > mActiveResources
-            = new HashMap<ResourcesKey, WeakReference<Resources> >();
+    final ArrayMap<ResourcesKey, WeakReference<Resources> > mActiveResources
+            = new ArrayMap<ResourcesKey, WeakReference<Resources> >();
 
     final ArrayMap<DisplayAdjustments, DisplayMetrics> mDefaultDisplayMetrics
             = new ArrayMap<DisplayAdjustments, DisplayMetrics>();
@@ -257,19 +253,16 @@ public class ResourcesManager {
 
         Configuration tmpConfig = null;
 
-        Iterator<Map.Entry<ResourcesKey, WeakReference<Resources>>> it =
-                mActiveResources.entrySet().iterator();
-        while (it.hasNext()) {
-            Map.Entry<ResourcesKey, WeakReference<Resources>> entry = it.next();
-            Resources r = entry.getValue().get();
+        for (int i=mActiveResources.size()-1; i>=0; i--) {
+            ResourcesKey key = mActiveResources.keyAt(i);
+            Resources r = mActiveResources.valueAt(i).get();
             if (r != null) {
                 if (DEBUG_CONFIGURATION) Slog.v(TAG, "Changing resources "
                         + r + " config to: " + config);
-                int displayId = entry.getKey().mDisplayId;
+                int displayId = key.mDisplayId;
                 boolean isDefaultDisplay = (displayId == Display.DEFAULT_DISPLAY);
                 DisplayMetrics dm = defaultDisplayMetrics;
-                ResourcesKey resourcesKey = entry.getKey();
-                final boolean hasOverrideConfiguration = resourcesKey.hasOverrideConfiguration();
+                final boolean hasOverrideConfiguration = key.hasOverrideConfiguration();
                 if (!isDefaultDisplay || hasOverrideConfiguration) {
                     if (tmpConfig == null) {
                         tmpConfig = new Configuration();
@@ -280,7 +273,7 @@ public class ResourcesManager {
                         applyNonDefaultDisplayMetricsToConfigurationLocked(dm, tmpConfig);
                     }
                     if (hasOverrideConfiguration) {
-                        tmpConfig.updateFrom(resourcesKey.mOverrideConfiguration);
+                        tmpConfig.updateFrom(key.mOverrideConfiguration);
                     }
                     r.updateConfiguration(tmpConfig, dm, compat);
                 } else {
@@ -290,7 +283,7 @@ public class ResourcesManager {
                 //        + " " + r + ": " + r.getConfiguration());
             } else {
                 //Slog.i(TAG, "Removing old resources " + v.getKey());
-                it.remove();
+                mActiveResources.removeAt(i);
             }
         }
 
diff --git a/core/java/android/content/Intent.java b/core/java/android/content/Intent.java
index 62c8d58c9dcb1..a954f59720d6f 100644
--- a/core/java/android/content/Intent.java
+++ b/core/java/android/content/Intent.java
@@ -16,6 +16,7 @@
 
 package android.content;
 
+import android.util.ArraySet;
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 
@@ -42,7 +43,6 @@ import java.io.IOException;
 import java.io.Serializable;
 import java.net.URISyntaxException;
 import java.util.ArrayList;
-import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Locale;
 import java.util.Set;
@@ -3609,7 +3609,7 @@ public class Intent implements Parcelable, Cloneable {
     private String mPackage;
     private ComponentName mComponent;
     private int mFlags;
-    private HashSet<String> mCategories;
+    private ArraySet<String> mCategories;
     private Bundle mExtras;
     private Rect mSourceBounds;
     private Intent mSelector;
@@ -3634,7 +3634,7 @@ public class Intent implements Parcelable, Cloneable {
         this.mComponent = o.mComponent;
         this.mFlags = o.mFlags;
         if (o.mCategories != null) {
-            this.mCategories = new HashSet<String>(o.mCategories);
+            this.mCategories = new ArraySet<String>(o.mCategories);
         }
         if (o.mExtras != null) {
             this.mExtras = new Bundle(o.mExtras);
@@ -3662,7 +3662,7 @@ public class Intent implements Parcelable, Cloneable {
         this.mPackage = o.mPackage;
         this.mComponent = o.mComponent;
         if (o.mCategories != null) {
-            this.mCategories = new HashSet<String>(o.mCategories);
+            this.mCategories = new ArraySet<String>(o.mCategories);
         }
     }
 
@@ -5226,7 +5226,7 @@ public class Intent implements Parcelable, Cloneable {
      */
     public Intent addCategory(String category) {
         if (mCategories == null) {
-            mCategories = new HashSet<String>();
+            mCategories = new ArraySet<String>();
         }
         mCategories.add(category.intern());
         return this;
@@ -6370,7 +6370,7 @@ public class Intent implements Parcelable, Cloneable {
         if (other.mCategories != null
                 && (mCategories == null || (flags&FILL_IN_CATEGORIES) != 0)) {
             if (other.mCategories != null) {
-                mCategories = new HashSet<String>(other.mCategories);
+                mCategories = new ArraySet<String>(other.mCategories);
             }
             changes |= FILL_IN_CATEGORIES;
         }
@@ -6641,12 +6641,9 @@ public class Intent implements Parcelable, Cloneable {
             }
             first = false;
             b.append("cat=[");
-            Iterator<String> i = mCategories.iterator();
-            boolean didone = false;
-            while (i.hasNext()) {
-                if (didone) b.append(",");
-                didone = true;
-                b.append(i.next());
+            for (int i=0; i<mCategories.size(); i++) {
+                if (i > 0) b.append(',');
+                b.append(mCategories.valueAt(i));
             }
             b.append("]");
         }
@@ -6804,8 +6801,8 @@ public class Intent implements Parcelable, Cloneable {
             uri.append("action=").append(Uri.encode(mAction)).append(';');
         }
         if (mCategories != null) {
-            for (String category : mCategories) {
-                uri.append("category=").append(Uri.encode(category)).append(';');
+            for (int i=0; i<mCategories.size(); i++) {
+                uri.append("category=").append(Uri.encode(mCategories.valueAt(i))).append(';');
             }
         }
         if (mType != null) {
@@ -6873,9 +6870,10 @@ public class Intent implements Parcelable, Cloneable {
         }
 
         if (mCategories != null) {
-            out.writeInt(mCategories.size());
-            for (String category : mCategories) {
-                out.writeString(category);
+            final int N = mCategories.size();
+            out.writeInt(N);
+            for (int i=0; i<N; i++) {
+                out.writeString(mCategories.valueAt(i));
             }
         } else {
             out.writeInt(0);
@@ -6927,7 +6925,7 @@ public class Intent implements Parcelable, Cloneable {
 
         int N = in.readInt();
         if (N > 0) {
-            mCategories = new HashSet<String>();
+            mCategories = new ArraySet<String>();
             int i;
             for (i=0; i<N; i++) {
                 mCategories.add(in.readString().intern());