diff --git a/libmetricslogger/Android.bp b/libmetricslogger/Android.bp
new file mode 100644
index 0000000..ca8af57
--- /dev/null
+++ b/libmetricslogger/Android.bp
@@ -0,0 +1,64 @@
+// Copyright 2017 The Android Open Source Project
+
+metricslogger_lib_src_files = [
+    "metrics_logger.cpp",
+]
+
+cc_defaults {
+    name: "metricslogger_defaults",
+
+    clang: true,
+    host_supported: true,
+
+    export_include_dirs: ["include"],
+    local_include_dirs: ["include"],
+    shared_libs: ["liblog"],
+    whole_static_libs: ["libgtest_prod"],
+
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+
+        // 524291 corresponds to sysui_histogram, from
+        // frameworks/base/core/java/com/android/internal/logging/EventLogTags.logtags
+        "-DHISTOGRAM_LOG_TAG=524291",
+    ],
+}
+
+// metricslogger shared library
+// -----------------------------------------------------------------------------
+cc_library_shared {
+    name: "libmetricslogger",
+    srcs: metricslogger_lib_src_files,
+    defaults: ["metricslogger_defaults"],
+}
+
+// metricslogger shared library, debug
+// -----------------------------------------------------------------------------
+cc_library_shared {
+    name: "libmetricslogger_debug",
+    srcs: metricslogger_lib_src_files,
+    defaults: ["metricslogger_defaults"],
+
+    target: {
+        host: {
+            cflags: ["-UNDEBUG"],
+        },
+    },
+}
+
+// Native tests
+// -----------------------------------------------------------------------------
+cc_test {
+    name: "metricslogger_tests",
+    defaults: ["metricslogger_defaults"],
+    shared_libs: [
+        "libbase",
+        "libmetricslogger_debug",
+    ],
+    srcs: [
+        "metrics_logger_test.cpp",
+        "testrunner.cpp",
+    ],
+}
diff --git a/libmetricslogger/include/metricslogger/metrics_logger.h b/libmetricslogger/include/metricslogger/metrics_logger.h
new file mode 100644
index 0000000..d30e56c
--- /dev/null
+++ b/libmetricslogger/include/metricslogger/metrics_logger.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2017 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 <cstdint>
+#include <string>
+
+namespace android {
+namespace metricslogger {
+
+// Logs a Tron histogram metric named |event| containing |data| to the Tron log
+// buffer.
+void LogHistogram(const std::string& event, int32_t data);
+
+}  // namespace metricslogger
+}  // namespace android
diff --git a/libmetricslogger/metrics_logger.cpp b/libmetricslogger/metrics_logger.cpp
new file mode 100644
index 0000000..f8e0174
--- /dev/null
+++ b/libmetricslogger/metrics_logger.cpp
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2017 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 "metricslogger/metrics_logger.h"
+
+#include <cstdlib>
+
+#include <log/log_event_list.h>
+
+namespace android {
+namespace metricslogger {
+
+void LogHistogram(const std::string& event, int32_t data) {
+  android_log_event_list log(HISTOGRAM_LOG_TAG);
+  log << event << data << LOG_ID_EVENTS;
+}
+
+}  // namespace metricslogger
+}  // namespace android
diff --git a/libmetricslogger/metrics_logger_test.cpp b/libmetricslogger/metrics_logger_test.cpp
new file mode 100644
index 0000000..d77199c
--- /dev/null
+++ b/libmetricslogger/metrics_logger_test.cpp
@@ -0,0 +1,31 @@
+/*
+ * 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 "metricslogger/metrics_logger.h"
+
+#include <gtest/gtest.h>
+
+TEST(MetricsLoggerTest, AddSingleBootEvent) {
+  android::metricslogger::LogHistogram("test_event", 42);
+  /*pid_t pid = getpid();
+  struct logger_list *logger_list = android_logger_list_open(
+      LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 0, pid);
+
+  logger_list = NULL;
+  log_msg log_msg;
+  android_logger_list_read(logger_list, &log_msg);
+  std::cout << log_msg.len() << std::endl;*/
+}
diff --git a/libmetricslogger/testrunner.cpp b/libmetricslogger/testrunner.cpp
new file mode 100644
index 0000000..edbf4d5
--- /dev/null
+++ b/libmetricslogger/testrunner.cpp
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2017 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 <android-base/logging.h>
+#include <gtest/gtest.h>
+
+int main(int argc, char** argv) {
+  ::testing::InitGoogleTest(&argc, argv);
+  android::base::InitLogging(argv, android::base::StderrLogger);
+  return RUN_ALL_TESTS();
+}