upload android base code part6

android/system/chre/apps/message_world/Makefile

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+#
+# Message World Nanoapp Makefile
+#
+
+# Environment Checks ###########################################################
+
+ifeq ($(CHRE_PREFIX),)
+$(error "The CHRE_PREFIX environment variable must be set to a path to the \
+         CHRE project root. Example: export CHRE_PREFIX=$$HOME/chre")
+endif
+
+# Nanoapp Configuration ########################################################
+
+NANOAPP_NAME = message_world
+
+# Common Compiler Flags ########################################################
+
+COMMON_CFLAGS += -I.
+
+# Common Source Files ##########################################################
+
+COMMON_SRCS += message_world.cc
+
+# Makefile Includes ############################################################
+
+include $(CHRE_PREFIX)/build/nanoapp/app.mk

android/system/chre/apps/message_world/message_world.cc

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+/*
+ * Copyright (C) 2016 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.
+ */
+
+#include <chre.h>
+#include <cinttypes>
+
+#include "chre/util/nanoapp/log.h"
+
+#define LOG_TAG "[MsgWorld]"
+
+#ifdef CHRE_NANOAPP_INTERNAL
+namespace chre {
+namespace {
+#endif  // CHRE_NANOAPP_INTERNAL
+
+namespace {
+
+constexpr uint32_t kMessageType = 1234;
+uint8_t gMessageData[CHRE_MESSAGE_TO_HOST_MAX_SIZE] = {1, 2, 3, 4, 5, 6, 7, 8};
+
+void messageFreeCallback(void *message, size_t messageSize) {
+  LOGI("Got message free callback for message @"
+       " %p (match? %d) size %zu (match? %d)",
+       message, (message == gMessageData),
+       messageSize, (messageSize == sizeof(gMessageData)));
+  if (!chreSendEvent(CHRE_EVENT_FIRST_USER_VALUE, nullptr, nullptr,
+                     chreGetInstanceId())) {
+    LOGE("Failed to send event");
+  }
+}
+
+}  // anonymous namespace
+
+bool nanoappStart() {
+  LOGI("App started as instance %" PRIu32, chreGetInstanceId());
+
+  bool success = chreSendMessageToHostEndpoint(
+      gMessageData, sizeof(gMessageData), kMessageType,
+      CHRE_HOST_ENDPOINT_BROADCAST, messageFreeCallback);
+  LOGI("Sent message to host from start callback, result %d", success);
+  return true;
+}
+
+void nanoappHandleEvent(uint32_t senderInstanceId,
+                        uint16_t eventType,
+                        const void *eventData) {
+  if (eventType == CHRE_EVENT_MESSAGE_FROM_HOST) {
+    auto *msg = static_cast<const chreMessageFromHostData *>(eventData);
+    LOGI("Got message from host with type %" PRIu32 " size %" PRIu32
+         " data @ %p hostEndpoint 0x%" PRIx16,
+         msg->messageType, msg->messageSize, msg->message, msg->hostEndpoint);
+    if (senderInstanceId != CHRE_INSTANCE_ID) {
+      LOGE("Message from host came from unexpected instance ID %" PRIu32,
+           senderInstanceId);
+    }
+
+    bool success = chreSendMessageToHostEndpoint(
+      gMessageData, sizeof(gMessageData), kMessageType,
+      CHRE_HOST_ENDPOINT_BROADCAST, messageFreeCallback);
+    LOGI("Result of sending reply: %d", success);
+  }
+}
+
+void nanoappEnd() {
+  LOGI("Stopped");
+}
+
+#ifdef CHRE_NANOAPP_INTERNAL
+}  // anonymous namespace
+}  // namespace chre
+
+#include "chre/util/nanoapp/app_id.h"
+#include "chre/platform/static_nanoapp_init.h"
+
+CHRE_STATIC_NANOAPP_INIT(MessageWorld, chre::kMessageWorldAppId, 0);
+#endif  // CHRE_NANOAPP_INTERNAL

android/system/chre/apps/message_world/message_world.mk

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+#
+# Message World Makefile
+#
+
+# Common Compiler Flags ########################################################
+
+# Include paths.
+COMMON_CFLAGS += -Iapps/message_world/include
+
+# Common Source Files ##########################################################
+
+COMMON_SRCS += apps/message_world/message_world.cc