| /* |
| * Copyright 2014, The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "ActivityRecognitionHardware" |
| |
| #include <jni.h> |
| #include <JNIHelp.h> |
| |
| #include <android_runtime/AndroidRuntime.h> |
| #include <android_runtime/Log.h> |
| |
| #include "activity_recognition.h" |
| |
| |
| // keep base connection data from the HAL |
| static activity_recognition_module_t* sModule = NULL; |
| static activity_recognition_device_t* sDevice = NULL; |
| |
| static jobject sCallbacksObject = NULL; |
| static jmethodID sOnActivityChanged = NULL; |
| |
| |
| static void check_and_clear_exceptions(JNIEnv* env, const char* method_name) { |
| if (!env->ExceptionCheck()) { |
| return; |
| } |
| |
| ALOGE("An exception was thrown by '%s'.", method_name); |
| LOGE_EX(env); |
| env->ExceptionClear(); |
| } |
| |
| static jint attach_thread(JNIEnv** env) { |
| JavaVM* java_vm = android::AndroidRuntime::getJavaVM(); |
| assert(java_vm != NULL); |
| |
| JavaVMAttachArgs args = { |
| JNI_VERSION_1_6, |
| "ActivityRecognition HAL callback.", |
| NULL /* group */ |
| }; |
| |
| jint result = java_vm->AttachCurrentThread(env, &args); |
| if (result != JNI_OK) { |
| ALOGE("Attach to callback thread failed: %d", result); |
| } |
| |
| return result; |
| } |
| |
| static jint detach_thread() { |
| JavaVM* java_vm = android::AndroidRuntime::getJavaVM(); |
| assert(java_vm != NULL); |
| |
| jint result = java_vm->DetachCurrentThread(); |
| if (result != JNI_OK) { |
| ALOGE("Detach of callback thread failed: %d", result); |
| } |
| |
| return result; |
| } |
| |
| |
| /** |
| * Handle activity recognition events from HAL. |
| */ |
| static void activity_callback( |
| const activity_recognition_callback_procs_t* procs, |
| const activity_event_t* events, |
| int count) { |
| if (sOnActivityChanged == NULL) { |
| ALOGE("Dropping activity_callback because onActivityChanged handler is null."); |
| return; |
| } |
| |
| if (events == NULL || count <= 0) { |
| ALOGE("Invalid activity_callback. Count: %d, Events: %p", count, events); |
| return; |
| } |
| |
| JNIEnv* env = NULL; |
| int result = attach_thread(&env); |
| if (result != JNI_OK) { |
| ALOGE("Unable to attach thread with JNI."); |
| return; |
| } |
| |
| jclass event_class = |
| env->FindClass("android/hardware/location/ActivityRecognitionHardware$Event"); |
| jmethodID event_ctor = env->GetMethodID(event_class, "<init>", "()V"); |
| jfieldID activity_field = env->GetFieldID(event_class, "activity", "I"); |
| jfieldID type_field = env->GetFieldID(event_class, "type", "I"); |
| jfieldID timestamp_field = env->GetFieldID(event_class, "timestamp", "J"); |
| |
| jobjectArray events_array = env->NewObjectArray(count, event_class, NULL); |
| for (int i = 0; i < count; ++i) { |
| const activity_event_t* event = &events[i]; |
| jobject event_object = env->NewObject(event_class, event_ctor); |
| env->SetIntField(event_object, activity_field, event->activity); |
| env->SetIntField(event_object, type_field, event->event_type); |
| env->SetLongField(event_object, timestamp_field, event->timestamp); |
| env->SetObjectArrayElement(events_array, i, event_object); |
| env->DeleteLocalRef(event_object); |
| } |
| |
| env->CallVoidMethod(sCallbacksObject, sOnActivityChanged, events_array); |
| check_and_clear_exceptions(env, __FUNCTION__); |
| |
| // TODO: ideally we'd let the HAL register the callback thread only once |
| detach_thread(); |
| } |
| |
| activity_recognition_callback_procs_t sCallbacks = { |
| activity_callback, |
| }; |
| |
| /** |
| * Initializes the ActivityRecognitionHardware class from the native side. |
| */ |
| static void class_init(JNIEnv* env, jclass clazz) { |
| // open the hardware module |
| int error = hw_get_module( |
| ACTIVITY_RECOGNITION_HARDWARE_MODULE_ID, |
| (const hw_module_t**) &sModule); |
| if (error != 0) { |
| ALOGE("Error hw_get_module: %d", error); |
| return; |
| } |
| |
| error = activity_recognition_open(&sModule->common, &sDevice); |
| if (error != 0) { |
| ALOGE("Error opening device: %d", error); |
| return; |
| } |
| |
| // get references to the Java provided methods |
| sOnActivityChanged = env->GetMethodID( |
| clazz, |
| "onActivityChanged", |
| "([Landroid/hardware/location/ActivityRecognitionHardware$Event;)V"); |
| if (sOnActivityChanged == NULL) { |
| ALOGE("Error obtaining ActivityChanged callback."); |
| return; |
| } |
| |
| // register callbacks |
| sDevice->register_activity_callback(sDevice, &sCallbacks); |
| } |
| |
| /** |
| * Initializes and connect the callbacks handlers in the HAL. |
| */ |
| static void initialize(JNIEnv* env, jobject obj) { |
| if (sCallbacksObject == NULL) { |
| sCallbacksObject = env->NewGlobalRef(obj); |
| } else { |
| ALOGD("Callbacks Object was already initialized."); |
| } |
| |
| if (sDevice != NULL) { |
| sDevice->register_activity_callback(sDevice, &sCallbacks); |
| } else { |
| ALOGD("ActivityRecognition device not found during initialization."); |
| } |
| } |
| |
| /** |
| * De-initializes the ActivityRecognitionHardware from the native side. |
| */ |
| static void release(JNIEnv* env, jobject obj) { |
| if (sDevice == NULL) { |
| return; |
| } |
| |
| int error = activity_recognition_close(sDevice); |
| if (error != 0) { |
| ALOGE("Error closing device: %d", error); |
| return; |
| } |
| } |
| |
| /** |
| * Returns true if ActivityRecognition HAL is supported, false otherwise. |
| */ |
| static jboolean is_supported(JNIEnv* env, jclass clazz) { |
| if (sModule != NULL && sDevice != NULL ) { |
| return JNI_TRUE; |
| } |
| return JNI_FALSE; |
| } |
| |
| /** |
| * Gets an array representing the supported activities. |
| */ |
| static jobjectArray get_supported_activities(JNIEnv* env, jobject obj) { |
| if (sModule == NULL) { |
| return NULL; |
| } |
| |
| char const* const* list = NULL; |
| int list_size = sModule->get_supported_activities_list(sModule, &list); |
| if (list_size <= 0 || list == NULL) { |
| return NULL; |
| } |
| |
| jclass string_class = env->FindClass("java/lang/String"); |
| if (string_class == NULL) { |
| ALOGE("Unable to find String class for supported activities."); |
| return NULL; |
| } |
| |
| jobjectArray string_array = env->NewObjectArray(list_size, string_class, NULL); |
| if (string_array == NULL) { |
| ALOGE("Unable to create string array for supported activities."); |
| return NULL; |
| } |
| |
| for (int i = 0; i < list_size; ++i) { |
| const char* string_ptr = const_cast<const char*>(list[i]); |
| jstring string = env->NewStringUTF(string_ptr); |
| env->SetObjectArrayElement(string_array, i, string); |
| } |
| |
| return string_array; |
| } |
| |
| /** |
| * Enables a given activity event to be actively monitored. |
| */ |
| static int enable_activity_event( |
| JNIEnv* env, |
| jobject obj, |
| jint activity_handle, |
| jint event_type, |
| jlong report_latency_ns) { |
| return sDevice->enable_activity_event( |
| sDevice, |
| (uint32_t) activity_handle, |
| (uint32_t) event_type, |
| report_latency_ns); |
| } |
| |
| /** |
| * Disables a given activity event from being actively monitored. |
| */ |
| static int disable_activity_event( |
| JNIEnv* env, |
| jobject obj, |
| jint activity_handle, |
| jint event_type) { |
| return sDevice->disable_activity_event( |
| sDevice, |
| (uint32_t) activity_handle, |
| (uint32_t) event_type); |
| } |
| |
| /** |
| * Request flush for al batch buffers. |
| */ |
| static int flush(JNIEnv* env, jobject obj) { |
| return sDevice->flush(sDevice); |
| } |
| |
| |
| static const JNINativeMethod sMethods[] = { |
| // {"name", "signature", (void*) functionPointer }, |
| { "nativeClassInit", "()V", (void*) class_init }, |
| { "nativeInitialize", "()V", (void*) initialize }, |
| { "nativeRelease", "()V", (void*) release }, |
| { "nativeIsSupported", "()Z", (void*) is_supported }, |
| { "nativeGetSupportedActivities", "()[Ljava/lang/String;", (void*) get_supported_activities }, |
| { "nativeEnableActivityEvent", "(IIJ)I", (void*) enable_activity_event }, |
| { "nativeDisableActivityEvent", "(II)I", (void*) disable_activity_event }, |
| { "nativeFlush", "()I", (void*) flush }, |
| }; |
| |
| /** |
| * Registration method invoked in JNI load. |
| */ |
| int register_android_hardware_location_ActivityRecognitionHardware(JNIEnv* env) { |
| return jniRegisterNativeMethods( |
| env, |
| "android/hardware/location/ActivityRecognitionHardware", |
| sMethods, |
| NELEM(sMethods)); |
| } |