Trace.java revision 93a35b93dc582e38ff8ee5979754a16b4bf4da0c 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.bitmap.util;
18
19import java.lang.reflect.Method;
20
21public class Trace {
22
23    private static Method sBegin;
24    private static Method sEnd;
25
26    public static void init() {
27        if (sBegin != null && sEnd != null) {
28            return;
29        }
30        try {
31            final Class<?> cls = Class.forName("android.os.Trace");
32            sBegin = cls.getMethod("beginSection", String.class);
33            sEnd = cls.getMethod("endSection");
34        } catch (Exception e) {
35            e.printStackTrace();
36        }
37    }
38
39    public static void beginSection(String tag) {
40        if (sBegin == null) {
41            return;
42        }
43        try {
44            sBegin.invoke(null, tag);
45        } catch (Exception e) {
46            e.printStackTrace();
47        }
48    }
49
50    public static void endSection() {
51        if (sEnd == null) {
52            return;
53        }
54        try {
55            sEnd.invoke(null, (Object[]) null);
56        } catch (Exception e) {
57            e.printStackTrace();
58        }
59    }
60}
61