1 // Copyright 2015 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 package org.chromium.base.metrics; 6 7 import org.chromium.base.ThreadUtils; 8 import org.chromium.base.annotations.JNINamespace; 9 10 /** 11 * Java API for recording UMA actions. 12 * 13 * WARNINGS: 14 * JNI calls are relatively costly - avoid using in performance-critical code. 15 * 16 * We use a script (extract_actions.py) to scan the source code and extract actions. A string 17 * literal (not a variable) must be passed to record(). 18 */ 19 @JNINamespace("base::android") 20 public class RecordUserAction { record(final String action)21 public static void record(final String action) { 22 if (ThreadUtils.runningOnUiThread()) { 23 nativeRecordUserAction(action); 24 return; 25 } 26 27 ThreadUtils.runOnUiThread(new Runnable() { 28 @Override 29 public void run() { 30 nativeRecordUserAction(action); 31 } 32 }); 33 } 34 nativeRecordUserAction(String action)35 private static native void nativeRecordUserAction(String action); 36 } 37