diff --git a/libmetricslogger/Android.bp b/libmetricslogger/Android.bp
index 26a041a..15d1ff2 100644
--- a/libmetricslogger/Android.bp
+++ b/libmetricslogger/Android.bp
@@ -20,10 +20,13 @@
         "-Wextra",
         "-Werror",
 
-        // 524291 corresponds to sysui_histogram, from
-        // frameworks/base/core/java/com/android/internal/logging/EventLogTags.logtags
-        "-DHISTOGRAM_LOG_TAG=524292",
+        // The following defines map logtag IDs as represented by:
+        //   frameworks/base/core/java/com/android/internal/logging/EventLogTags.logtags
+        //
+        // E.g., 524290 corresponds to sysui_count.
         "-DCOUNT_LOG_TAG=524290",
+        "-DHISTOGRAM_LOG_TAG=524292",
+        "-DMULTI_ACTION_LOG_TAG=524292",
     ],
 }
 
diff --git a/libmetricslogger/include/metricslogger/metrics_logger.h b/libmetricslogger/include/metricslogger/metrics_logger.h
index 36e124d..fcabcc9 100644
--- a/libmetricslogger/include/metricslogger/metrics_logger.h
+++ b/libmetricslogger/include/metricslogger/metrics_logger.h
@@ -28,14 +28,26 @@
 // log buffer.
 void LogCounter(const std::string& name, int32_t val);
 
+// Logs a Tron multi_action with category|category| containing the string
+// |value| in the field |field|.
+void LogMultiAction(int32_t category, int32_t field, const std::string& value);
+
 // TODO: replace these with the metric_logger.proto definitions
 enum {
     LOGBUILDER_CATEGORY = 757,
+    LOGBUILDER_TYPE = 758,
     LOGBUILDER_NAME = 799,
     LOGBUILDER_BUCKET = 801,
     LOGBUILDER_VALUE = 802,
     LOGBUILDER_COUNTER = 803,
     LOGBUILDER_HISTOGRAM = 804,
+
+    ACTION_BOOT = 1092,
+    FIELD_PLATFORM_REASON = 1093,
+};
+
+enum {
+    TYPE_ACTION = 4,
 };
 
 }  // namespace metricslogger
diff --git a/libmetricslogger/metrics_logger.cpp b/libmetricslogger/metrics_logger.cpp
index 6f65e10..a0dcf09 100644
--- a/libmetricslogger/metrics_logger.cpp
+++ b/libmetricslogger/metrics_logger.cpp
@@ -37,5 +37,12 @@
         << val << LOG_ID_EVENTS;
 }
 
+// Mirror com.android.internal.logging.MetricsLogger#action().
+void LogMultiAction(int32_t category, int32_t field, const std::string& value) {
+    android_log_event_list log(MULTI_ACTION_LOG_TAG);
+    log << LOGBUILDER_CATEGORY << category << LOGBUILDER_TYPE << TYPE_ACTION
+        << field << value << LOG_ID_EVENTS;
+}
+
 }  // namespace metricslogger
 }  // namespace android