diff --git a/core/java/android/net/Network.java b/core/java/android/net/Network.java
index 58f0fc0..ddb8e94 100644
--- a/core/java/android/net/Network.java
+++ b/core/java/android/net/Network.java
@@ -16,7 +16,6 @@
 
 package android.net;
 
-import android.net.NetworkUtils;
 import android.os.Parcelable;
 import android.os.Parcel;
 import android.system.ErrnoException;
@@ -31,15 +30,14 @@
 import java.net.UnknownHostException;
 import java.net.URL;
 import java.net.URLConnection;
-import java.net.URLStreamHandler;
-import java.util.concurrent.atomic.AtomicReference;
 import javax.net.SocketFactory;
 
 import com.android.okhttp.ConnectionPool;
-import com.android.okhttp.HostResolver;
 import com.android.okhttp.HttpHandler;
 import com.android.okhttp.HttpsHandler;
 import com.android.okhttp.OkHttpClient;
+import com.android.okhttp.OkUrlFactory;
+import com.android.okhttp.internal.Internal;
 
 /**
  * Identifies a {@code Network}.  This is supplied to applications via
@@ -60,10 +58,10 @@
     // Objects used to perform per-network operations such as getSocketFactory
     // and openConnection, and a lock to protect access to them.
     private volatile NetworkBoundSocketFactory mNetworkBoundSocketFactory = null;
-    // mLock should be used to control write access to mConnectionPool and mHostResolver.
+    // mLock should be used to control write access to mConnectionPool and mNetwork.
     // maybeInitHttpClient() must be called prior to reading either variable.
     private volatile ConnectionPool mConnectionPool = null;
-    private volatile HostResolver mHostResolver = null;
+    private volatile com.android.okhttp.internal.Network mNetwork = null;
     private Object mLock = new Object();
 
     // Default connection pool values. These are evaluated at startup, just
@@ -217,10 +215,10 @@
     // out) ConnectionPools.
     private void maybeInitHttpClient() {
         synchronized (mLock) {
-            if (mHostResolver == null) {
-                mHostResolver = new HostResolver() {
+            if (mNetwork == null) {
+                mNetwork = new com.android.okhttp.internal.Network() {
                     @Override
-                    public InetAddress[] getAllByName(String host) throws UnknownHostException {
+                    public InetAddress[] resolveInetAddresses(String host) throws UnknownHostException {
                         return Network.this.getAllByName(host);
                     }
                 };
@@ -244,23 +242,26 @@
     public URLConnection openConnection(URL url) throws IOException {
         maybeInitHttpClient();
         String protocol = url.getProtocol();
-        OkHttpClient client;
-        // TODO: HttpHandler creates OkHttpClients that share the default ResponseCache.
+        OkUrlFactory okUrlFactory;
+        // TODO: HttpHandler creates OkUrlFactory instances that share the default ResponseCache.
         // Could this cause unexpected behavior?
         // TODO: Should the network's proxy be specified?
         if (protocol.equals("http")) {
-            client = HttpHandler.createHttpOkHttpClient(null /* proxy */);
+            okUrlFactory = HttpHandler.createHttpOkUrlFactory(null /* proxy */);
         } else if (protocol.equals("https")) {
-            client = HttpsHandler.createHttpsOkHttpClient(null /* proxy */);
+            okUrlFactory = HttpsHandler.createHttpsOkUrlFactory(null /* proxy */);
         } else {
-            // OkHttpClient only supports HTTP and HTTPS and returns a null URLStreamHandler if
+            // OkHttp only supports HTTP and HTTPS and returns a null URLStreamHandler if
             // passed another protocol.
             throw new MalformedURLException("Invalid URL or unrecognized protocol " + protocol);
         }
-        return client.setSocketFactory(getSocketFactory())
-                .setHostResolver(mHostResolver)
-                .setConnectionPool(mConnectionPool)
-                .open(url);
+        OkHttpClient client = okUrlFactory.client();
+        client.setSocketFactory(getSocketFactory()).setConnectionPool(mConnectionPool);
+
+        // Use internal APIs to change the Network.
+        Internal.instance.setNetwork(client, mNetwork);
+
+        return okUrlFactory.open(url);
     }
 
     /**
diff --git a/core/java/android/net/http/HttpResponseCache.java b/core/java/android/net/http/HttpResponseCache.java
index 2785a15..c6c22e7 100644
--- a/core/java/android/net/http/HttpResponseCache.java
+++ b/core/java/android/net/http/HttpResponseCache.java
@@ -16,32 +16,33 @@
 
 package android.net.http;
 
-import android.content.Context;
+import com.android.okhttp.Cache;
+import com.android.okhttp.AndroidShimResponseCache;
+import com.android.okhttp.OkCacheContainer;
+
 import java.io.Closeable;
 import java.io.File;
 import java.io.IOException;
 import java.net.CacheRequest;
 import java.net.CacheResponse;
-import java.net.HttpURLConnection;
 import java.net.ResponseCache;
 import java.net.URI;
 import java.net.URLConnection;
 import java.util.List;
 import java.util.Map;
-import javax.net.ssl.HttpsURLConnection;
-import org.apache.http.impl.client.DefaultHttpClient;
 
 /**
  * Caches HTTP and HTTPS responses to the filesystem so they may be reused,
- * saving time and bandwidth. This class supports {@link HttpURLConnection} and
- * {@link HttpsURLConnection}; there is no platform-provided cache for {@link
- * DefaultHttpClient} or {@link AndroidHttpClient}.
+ * saving time and bandwidth. This class supports {@link
+ * java.net.HttpURLConnection} and {@link javax.net.ssl.HttpsURLConnection};
+ * there is no platform-provided cache for {@link
+ * org.apache.http.impl.client.DefaultHttpClient} or {@link AndroidHttpClient}.
  *
  * <h3>Installing an HTTP response cache</h3>
  * Enable caching of all of your application's HTTP requests by installing the
  * cache at application startup. For example, this code installs a 10 MiB cache
- * in the {@link Context#getCacheDir() application-specific cache directory} of
- * the filesystem}: <pre>   {@code
+ * in the {@link android.content.Context#getCacheDir() application-specific
+ * cache directory} of the filesystem}: <pre>   {@code
  *   protected void onCreate(Bundle savedInstanceState) {
  *       ...
  *
@@ -73,10 +74,10 @@
  * contain private data.</strong> Although it often has more free space,
  * external storage is optional and&#8212;even if available&#8212;can disappear
  * during use. Retrieve the external cache directory using {@link
- * Context#getExternalCacheDir()}. If this method returns null, your application
- * should fall back to either not caching or caching on non-external storage. If
- * the external storage is removed during use, the cache hit rate will drop to
- * zero and ongoing cache reads will fail.
+ * android.content.Context#getExternalCacheDir()}. If this method returns null,
+ * your application should fall back to either not caching or caching on
+ * non-external storage. If the external storage is removed during use, the
+ * cache hit rate will drop to zero and ongoing cache reads will fail.
  *
  * <p>Flushing the cache forces its data to the filesystem. This ensures that
  * all responses written to the cache will be readable the next time the
@@ -147,11 +148,11 @@
  *       } catch (Exception httpResponseCacheNotAvailable) {
  *       }}</pre>
  */
-public final class HttpResponseCache extends ResponseCache implements Closeable {
+public final class HttpResponseCache extends ResponseCache implements Closeable, OkCacheContainer {
 
-    private final com.android.okhttp.HttpResponseCache delegate;
+    private final AndroidShimResponseCache delegate;
 
-    private HttpResponseCache(com.android.okhttp.HttpResponseCache delegate) {
+    private HttpResponseCache(AndroidShimResponseCache delegate) {
         this.delegate = delegate;
     }
 
@@ -161,17 +162,14 @@
      */
     public static HttpResponseCache getInstalled() {
         ResponseCache installed = ResponseCache.getDefault();
-        if (installed instanceof com.android.okhttp.HttpResponseCache) {
-            return new HttpResponseCache(
-                    (com.android.okhttp.HttpResponseCache) installed);
+        if (installed instanceof HttpResponseCache) {
+            return (HttpResponseCache) installed;
         }
-
         return null;
     }
 
     /**
-     * Creates a new HTTP response cache and {@link ResponseCache#setDefault
-     * sets it} as the system default cache.
+     * Creates a new HTTP response cache and sets it as the system default cache.
      *
      * @param directory the directory to hold cache data.
      * @param maxSize the maximum size of the cache in bytes.
@@ -180,26 +178,26 @@
      *     Most applications should respond to this exception by logging a
      *     warning.
      */
-    public static HttpResponseCache install(File directory, long maxSize) throws IOException {
+    public static synchronized HttpResponseCache install(File directory, long maxSize)
+            throws IOException {
         ResponseCache installed = ResponseCache.getDefault();
-        if (installed instanceof com.android.okhttp.HttpResponseCache) {
-            com.android.okhttp.HttpResponseCache installedCache =
-                    (com.android.okhttp.HttpResponseCache) installed;
+        if (installed instanceof HttpResponseCache) {
+            HttpResponseCache installedResponseCache = (HttpResponseCache) installed;
             // don't close and reopen if an equivalent cache is already installed
-            if (installedCache.getDirectory().equals(directory)
-                    && installedCache.getMaxSize() == maxSize
-                    && !installedCache.isClosed()) {
-                return new HttpResponseCache(installedCache);
+            AndroidShimResponseCache trueResponseCache = installedResponseCache.delegate;
+            if (trueResponseCache.isEquivalent(directory, maxSize)) {
+                return installedResponseCache;
             } else {
                 // The HttpResponseCache that owns this object is about to be replaced.
-                installedCache.close();
+                trueResponseCache.close();
             }
         }
 
-        com.android.okhttp.HttpResponseCache responseCache =
-                new com.android.okhttp.HttpResponseCache(directory, maxSize);
-        ResponseCache.setDefault(responseCache);
-        return new HttpResponseCache(responseCache);
+        AndroidShimResponseCache trueResponseCache =
+                AndroidShimResponseCache.create(directory, maxSize);
+        HttpResponseCache newResponseCache = new HttpResponseCache(trueResponseCache);
+        ResponseCache.setDefault(newResponseCache);
+        return newResponseCache;
     }
 
     @Override public CacheResponse get(URI uri, String requestMethod,
@@ -214,10 +212,15 @@
     /**
      * Returns the number of bytes currently being used to store the values in
      * this cache. This may be greater than the {@link #maxSize} if a background
-     * deletion is pending.
+     * deletion is pending. {@code -1} is returned if the size cannot be determined.
      */
     public long size() {
-        return delegate.getSize();
+        try {
+            return delegate.size();
+        } catch (IOException e) {
+            // This can occur if the cache failed to lazily initialize.
+            return -1;
+        }
     }
 
     /**
@@ -225,7 +228,7 @@
      * its data.
      */
     public long maxSize() {
-        return delegate.getMaxSize();
+        return delegate.maxSize();
     }
 
     /**
@@ -271,7 +274,7 @@
      * will remain on the filesystem.
      */
     @Override public void close() throws IOException {
-        if (ResponseCache.getDefault() == this.delegate) {
+        if (ResponseCache.getDefault() == this) {
             ResponseCache.setDefault(null);
         }
         delegate.close();
@@ -281,9 +284,16 @@
      * Uninstalls the cache and deletes all of its stored contents.
      */
     public void delete() throws IOException {
-        if (ResponseCache.getDefault() == this.delegate) {
+        if (ResponseCache.getDefault() == this) {
             ResponseCache.setDefault(null);
         }
         delegate.delete();
     }
+
+    /** @hide Needed for OkHttp integration. */
+    @Override
+    public Cache getCache() {
+        return delegate.getCache();
+    }
+
 }
diff --git a/core/tests/coretests/apks/install_bad_dex/Android.mk b/core/tests/coretests/apks/install_bad_dex/Android.mk
index 769a1b0..05983aa 100644
--- a/core/tests/coretests/apks/install_bad_dex/Android.mk
+++ b/core/tests/coretests/apks/install_bad_dex/Android.mk
@@ -5,6 +5,7 @@
 
 LOCAL_PACKAGE_NAME := install_bad_dex
 
-LOCAL_JAVA_RESOURCE_FILES := $(LOCAL_PATH)/classes.dex
-
 include $(FrameworkCoreTests_BUILD_PACKAGE)
+
+# Override target specific variable PRIVATE_DEX_FILE to inject bad classes.dex file.
+$(LOCAL_BUILT_MODULE): PRIVATE_DEX_FILE := $(LOCAL_PATH)/classes.dex