diff --git a/core/java/android/hardware/Camera.java b/core/java/android/hardware/Camera.java
index feb47aa..111062d 100644
--- a/core/java/android/hardware/Camera.java
+++ b/core/java/android/hardware/Camera.java
@@ -151,7 +151,7 @@
     private static final int CAMERA_MSG_PREVIEW_METADATA = 0x400;
     private static final int CAMERA_MSG_FOCUS_MOVE       = 0x800;
 
-    private int mNativeContext; // accessed by native methods
+    private long mNativeContext; // accessed by native methods
     private EventHandler mEventHandler;
     private ShutterCallback mShutterCallback;
     private PictureCallback mRawImageCallback;
diff --git a/core/java/android/hardware/SystemSensorManager.java b/core/java/android/hardware/SystemSensorManager.java
index 50fdb41..8684a04 100644
--- a/core/java/android/hardware/SystemSensorManager.java
+++ b/core/java/android/hardware/SystemSensorManager.java
@@ -222,14 +222,14 @@
      * the queues and the listeners.
      */
     private static abstract class BaseEventQueue {
-        private native int nativeInitBaseEventQueue(BaseEventQueue eventQ, MessageQueue msgQ,
+        private native long nativeInitBaseEventQueue(BaseEventQueue eventQ, MessageQueue msgQ,
                 float[] scratch);
-        private static native int nativeEnableSensor(int eventQ, int handle, int rateUs,
+        private static native int nativeEnableSensor(long eventQ, int handle, int rateUs,
                 int maxBatchReportLatencyUs, int reservedFlags);
-        private static native int nativeDisableSensor(int eventQ, int handle);
-        private static native void nativeDestroySensorEventQueue(int eventQ);
-        private static native int nativeFlushSensor(int eventQ);
-        private int nSensorEventQueue;
+        private static native int nativeDisableSensor(long eventQ, int handle);
+        private static native void nativeDestroySensorEventQueue(long eventQ);
+        private static native int nativeFlushSensor(long eventQ);
+        private long nSensorEventQueue;
         private final SparseBooleanArray mActiveSensors = new SparseBooleanArray();
         protected final SparseIntArray mSensorAccuracies = new SparseIntArray();
         protected final SparseBooleanArray mFirstEvent = new SparseBooleanArray();
diff --git a/core/java/android/hardware/usb/UsbDeviceConnection.java b/core/java/android/hardware/usb/UsbDeviceConnection.java
index b2034b2..389475f 100644
--- a/core/java/android/hardware/usb/UsbDeviceConnection.java
+++ b/core/java/android/hardware/usb/UsbDeviceConnection.java
@@ -32,7 +32,7 @@
     private final UsbDevice mDevice;
 
     // used by the JNI code
-    private int mNativeContext;
+    private long mNativeContext;
 
     /**
      * UsbDevice should only be instantiated by UsbService implementation
diff --git a/core/java/android/hardware/usb/UsbRequest.java b/core/java/android/hardware/usb/UsbRequest.java
index 3646715..ce66084 100644
--- a/core/java/android/hardware/usb/UsbRequest.java
+++ b/core/java/android/hardware/usb/UsbRequest.java
@@ -37,7 +37,7 @@
     private static final String TAG = "UsbRequest";
 
     // used by the JNI code
-    private int mNativeContext;
+    private long mNativeContext;
 
     private UsbEndpoint mEndpoint;
 
diff --git a/core/jni/android_hardware_Camera.cpp b/core/jni/android_hardware_Camera.cpp
index 09d8d0f..58b61ba 100644
--- a/core/jni/android_hardware_Camera.cpp
+++ b/core/jni/android_hardware_Camera.cpp
@@ -113,7 +113,7 @@
 {
     sp<Camera> camera;
     Mutex::Autolock _l(sLock);
-    JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetIntField(thiz, fields.context));
+    JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
     if (context != NULL) {
         camera = context->getCamera();
     }
@@ -500,7 +500,7 @@
     camera->setListener(context);
 
     // save context in opaque field
-    env->SetIntField(thiz, fields.context, (int)context.get());
+    env->SetLongField(thiz, fields.context, (jlong)context.get());
 }
 
 // disconnect from camera service
@@ -515,10 +515,10 @@
     sp<Camera> camera;
     {
         Mutex::Autolock _l(sLock);
-        context = reinterpret_cast<JNICameraContext*>(env->GetIntField(thiz, fields.context));
+        context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
 
         // Make sure we do not attempt to callback on a deleted Java object.
-        env->SetIntField(thiz, fields.context, 0);
+        env->SetLongField(thiz, fields.context, 0);
     }
 
     // clean up if release has not been called before
@@ -627,13 +627,13 @@
     c->stopPreview();
 }
 
-static bool android_hardware_Camera_previewEnabled(JNIEnv *env, jobject thiz)
+static jboolean android_hardware_Camera_previewEnabled(JNIEnv *env, jobject thiz)
 {
     ALOGV("previewEnabled");
     sp<Camera> c = get_native_camera(env, thiz, NULL);
-    if (c == 0) return false;
+    if (c == 0) return JNI_FALSE;
 
-    return c->previewEnabled();
+    return c->previewEnabled() ? JNI_TRUE : JNI_FALSE;
 }
 
 static void android_hardware_Camera_setHasPreviewCallback(JNIEnv *env, jobject thiz, jboolean installed, jboolean manualBuffer)
@@ -651,10 +651,10 @@
     context->setCallbackMode(env, installed, manualBuffer);
 }
 
-static void android_hardware_Camera_addCallbackBuffer(JNIEnv *env, jobject thiz, jbyteArray bytes, int msgType) {
+static void android_hardware_Camera_addCallbackBuffer(JNIEnv *env, jobject thiz, jbyteArray bytes, jint msgType) {
     ALOGV("addCallbackBuffer: 0x%x", msgType);
 
-    JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetIntField(thiz, fields.context));
+    JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
 
     if (context != NULL) {
         context->addCallbackBuffer(env, bytes, msgType);
@@ -685,7 +685,7 @@
     }
 }
 
-static void android_hardware_Camera_takePicture(JNIEnv *env, jobject thiz, int msgType)
+static void android_hardware_Camera_takePicture(JNIEnv *env, jobject thiz, jint msgType)
 {
     ALOGV("takePicture");
     JNICameraContext* context;
@@ -999,7 +999,7 @@
 int register_android_hardware_Camera(JNIEnv *env)
 {
     field fields_to_find[] = {
-        { "android/hardware/Camera", "mNativeContext",   "I", &fields.context },
+        { "android/hardware/Camera", "mNativeContext",   "J", &fields.context },
         { "android/hardware/Camera$CameraInfo", "facing",   "I", &fields.facing },
         { "android/hardware/Camera$CameraInfo", "orientation",   "I", &fields.orientation },
         { "android/hardware/Camera$CameraInfo", "canDisableShutterSound",   "Z",
diff --git a/core/jni/android_hardware_SensorManager.cpp b/core/jni/android_hardware_SensorManager.cpp
index 793d1bf..24e0b0a 100644
--- a/core/jni/android_hardware_SensorManager.cpp
+++ b/core/jni/android_hardware_SensorManager.cpp
@@ -187,7 +187,7 @@
     }
 };
 
-static jint nativeInitSensorEventQueue(JNIEnv *env, jclass clazz, jobject eventQ, jobject msgQ, jfloatArray scratch) {
+static jlong nativeInitSensorEventQueue(JNIEnv *env, jclass clazz, jobject eventQ, jobject msgQ, jfloatArray scratch) {
     SensorManager& mgr(SensorManager::getInstance());
     sp<SensorEventQueue> queue(mgr.createEventQueue());
 
@@ -199,28 +199,28 @@
 
     sp<Receiver> receiver = new Receiver(queue, messageQueue, eventQ, scratch);
     receiver->incStrong((void*)nativeInitSensorEventQueue);
-    return jint(receiver.get());
+    return jlong(receiver.get());
 }
 
-static jint nativeEnableSensor(JNIEnv *env, jclass clazz, jint eventQ, jint handle, jint rate_us,
+static jint nativeEnableSensor(JNIEnv *env, jclass clazz, jlong eventQ, jint handle, jint rate_us,
                                jint maxBatchReportLatency, jint reservedFlags) {
     sp<Receiver> receiver(reinterpret_cast<Receiver *>(eventQ));
     return receiver->getSensorEventQueue()->enableSensor(handle, rate_us, maxBatchReportLatency,
                                                          reservedFlags);
 }
 
-static jint nativeDisableSensor(JNIEnv *env, jclass clazz, jint eventQ, jint handle) {
+static jint nativeDisableSensor(JNIEnv *env, jclass clazz, jlong eventQ, jint handle) {
     sp<Receiver> receiver(reinterpret_cast<Receiver *>(eventQ));
     return receiver->getSensorEventQueue()->disableSensor(handle);
 }
 
-static void nativeDestroySensorEventQueue(JNIEnv *env, jclass clazz, jint eventQ, jint handle) {
+static void nativeDestroySensorEventQueue(JNIEnv *env, jclass clazz, jlong eventQ, jint handle) {
     sp<Receiver> receiver(reinterpret_cast<Receiver *>(eventQ));
     receiver->destroy();
     receiver->decStrong((void*)nativeInitSensorEventQueue);
 }
 
-static jint nativeFlushSensor(JNIEnv *env, jclass clazz, jint eventQ) {
+static jint nativeFlushSensor(JNIEnv *env, jclass clazz, jlong eventQ) {
     sp<Receiver> receiver(reinterpret_cast<Receiver *>(eventQ));
     return receiver->getSensorEventQueue()->flush();
 }
@@ -239,23 +239,23 @@
 
 static JNINativeMethod gBaseEventQueueMethods[] = {
     {"nativeInitBaseEventQueue",
-            "(Landroid/hardware/SystemSensorManager$BaseEventQueue;Landroid/os/MessageQueue;[F)I",
+            "(Landroid/hardware/SystemSensorManager$BaseEventQueue;Landroid/os/MessageQueue;[F)J",
             (void*)nativeInitSensorEventQueue },
 
     {"nativeEnableSensor",
-            "(IIIII)I",
+            "(JIIII)I",
             (void*)nativeEnableSensor },
 
     {"nativeDisableSensor",
-            "(II)I",
+            "(JI)I",
             (void*)nativeDisableSensor },
 
     {"nativeDestroySensorEventQueue",
-            "(I)V",
+            "(J)V",
             (void*)nativeDestroySensorEventQueue },
 
     {"nativeFlushSensor",
-            "(I)I",
+            "(J)I",
             (void*)nativeFlushSensor },
 };
 
diff --git a/core/jni/android_hardware_UsbDeviceConnection.cpp b/core/jni/android_hardware_UsbDeviceConnection.cpp
index cea5bbf..c10b963f 100644
--- a/core/jni/android_hardware_UsbDeviceConnection.cpp
+++ b/core/jni/android_hardware_UsbDeviceConnection.cpp
@@ -35,7 +35,7 @@
 
 struct usb_device* get_device_from_object(JNIEnv* env, jobject connection)
 {
-    return (struct usb_device*)env->GetIntField(connection, field_context);
+    return (struct usb_device*)env->GetLongField(connection, field_context);
 }
 
 static jboolean
@@ -46,19 +46,19 @@
     // duplicate the file descriptor, since ParcelFileDescriptor will eventually close its copy
     fd = dup(fd);
     if (fd < 0)
-        return false;
+        return JNI_FALSE;
 
     const char *deviceNameStr = env->GetStringUTFChars(deviceName, NULL);
     struct usb_device* device = usb_device_new(deviceNameStr, fd);
     if (device) {
-        env->SetIntField(thiz, field_context, (int)device);
+        env->SetLongField(thiz, field_context, (jlong)device);
     } else {
         ALOGE("usb_device_open failed for %s", deviceNameStr);
         close(fd);
     }
 
     env->ReleaseStringUTFChars(deviceName, deviceNameStr);
-    return (device != NULL);
+    return (device != NULL) ? JNI_TRUE : JNI_FALSE;
 }
 
 static void
@@ -68,7 +68,7 @@
     struct usb_device* device = get_device_from_object(env, thiz);
     if (device) {
         usb_device_close(device);
-        env->SetIntField(thiz, field_context, 0);
+        env->SetLongField(thiz, field_context, 0);
     }
 }
 
@@ -106,12 +106,12 @@
 
 static jboolean
 android_hardware_UsbDeviceConnection_claim_interface(JNIEnv *env, jobject thiz,
-        int interfaceID, jboolean force)
+        jint interfaceID, jboolean force)
 {
     struct usb_device* device = get_device_from_object(env, thiz);
     if (!device) {
         ALOGE("device is closed in native_claim_interface");
-        return -1;
+        return JNI_FALSE;
     }
 
     int ret = usb_device_claim_interface(device, interfaceID);
@@ -120,11 +120,11 @@
         usb_device_connect_kernel_driver(device, interfaceID, false);
         ret = usb_device_claim_interface(device, interfaceID);
     }
-    return ret == 0;
+    return (ret == 0) ? JNI_TRUE : JNI_FALSE;
 }
 
 static jint
-android_hardware_UsbDeviceConnection_release_interface(JNIEnv *env, jobject thiz, int interfaceID)
+android_hardware_UsbDeviceConnection_release_interface(JNIEnv *env, jobject thiz, jint interfaceID)
 {
     struct usb_device* device = get_device_from_object(env, thiz);
     if (!device) {
@@ -246,7 +246,7 @@
         ALOGE("Can't find android/hardware/usb/UsbDeviceConnection");
         return -1;
     }
-    field_context = env->GetFieldID(clazz, "mNativeContext", "I");
+    field_context = env->GetFieldID(clazz, "mNativeContext", "J");
     if (field_context == NULL) {
         ALOGE("Can't find UsbDeviceConnection.mNativeContext");
         return -1;
diff --git a/core/jni/android_hardware_UsbRequest.cpp b/core/jni/android_hardware_UsbRequest.cpp
index 32d5135..01eaec4 100644
--- a/core/jni/android_hardware_UsbRequest.cpp
+++ b/core/jni/android_hardware_UsbRequest.cpp
@@ -32,7 +32,7 @@
 
 struct usb_request* get_request_from_object(JNIEnv* env, jobject java_request)
 {
-    return (struct usb_request*)env->GetIntField(java_request, field_context);
+    return (struct usb_request*)env->GetLongField(java_request, field_context);
 }
 
 // in android_hardware_UsbDeviceConnection.cpp
@@ -61,7 +61,7 @@
 
     struct usb_request* request = usb_request_new(device, &desc);
     if (request)
-        env->SetIntField(thiz, field_context, (int)request);
+        env->SetLongField(thiz, field_context, (jlong)request);
     return (request != NULL);
 }
 
@@ -72,7 +72,7 @@
     struct usb_request* request = get_request_from_object(env, thiz);
     if (request) {
         usb_request_free(request);
-        env->SetIntField(thiz, field_context, 0);
+        env->SetLongField(thiz, field_context, 0);
     }
 }
 
@@ -114,14 +114,14 @@
     }
 }
 
-static int
+static jint
 android_hardware_UsbRequest_dequeue_array(JNIEnv *env, jobject thiz,
         jbyteArray buffer, jint length, jboolean out)
 {
     struct usb_request* request = get_request_from_object(env, thiz);
     if (!request) {
         ALOGE("request is closed in native_dequeue");
-        return -1;
+        return (jint) -1;
     }
 
     if (buffer && length && request->buffer && !out) {
@@ -130,7 +130,7 @@
     }
     free(request->buffer);
     env->DeleteGlobalRef((jobject)request->client_data);
-    return request->actual_length;
+    return (jint) request->actual_length;
 }
 
 static jboolean
@@ -164,17 +164,17 @@
     }
 }
 
-static int
+static jint
 android_hardware_UsbRequest_dequeue_direct(JNIEnv *env, jobject thiz)
 {
     struct usb_request* request = get_request_from_object(env, thiz);
     if (!request) {
         ALOGE("request is closed in native_dequeue");
-        return -1;
+        return (jint) -1;
     }
     // all we need to do is delete our global ref
     env->DeleteGlobalRef((jobject)request->client_data);
-    return request->actual_length;
+    return (jint) request->actual_length;
 }
 
 static jboolean
@@ -207,7 +207,7 @@
         ALOGE("Can't find android/hardware/usb/UsbRequest");
         return -1;
     }
-    field_context = env->GetFieldID(clazz, "mNativeContext", "I");
+    field_context = env->GetFieldID(clazz, "mNativeContext", "J");
     if (field_context == NULL) {
         ALOGE("Can't find UsbRequest.mNativeContext");
         return -1;