72 lines
2.0 KiB
Java
72 lines
2.0 KiB
Java
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.email;
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import android.os.SystemClock;
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import android.util.Log;
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/**
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* A simple class to measure elapsed time.
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*
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* <code>
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* StopWatch s = StopWatch.start();
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* // Do your stuff
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* s.split();
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* // More stuff
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* s.split();
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* // More stuff
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* s.stop();
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* </code>
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*/
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public class StopWatch {
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private final String mName;
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private final long mStart;
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private long mLastSplit;
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private StopWatch(String name) {
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mName = name;
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mStart = getCurrentTime();
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mLastSplit = mStart;
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Log.w(Email.LOG_TAG, "StopWatch(" + mName + ") start");
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}
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public static StopWatch start(String name) {
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return new StopWatch(name);
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}
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public void split(String label) {
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long now = getCurrentTime() ;
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long elapse = now - mLastSplit;
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Log.w(Email.LOG_TAG, "StopWatch(" + mName + ") split(" + label + ") " + elapse);
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mLastSplit = now;
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}
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public void stop() {
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long now = getCurrentTime();
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long elapse = now - mLastSplit;
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Log.w(Email.LOG_TAG, "StopWatch(" + mName + ") stop: "
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+ (now - mLastSplit)
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+ " (total " + (now - mStart) + ")");
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}
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private static long getCurrentTime() {
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// We might want to use other counters, such as currentThreadTimeMillis().
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// TODO add option for that?
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return SystemClock.elapsedRealtime();
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}
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}
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