1/*
2 * Copyright (C) 2009 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.settings.fuelgauge;
18
19import android.content.Context;
20
21import com.android.settings.R;
22
23/**
24 * Contains utility functions for formatting elapsed time and consumed bytes
25 */
26public class Utils {
27    private static final int SECONDS_PER_MINUTE = 60;
28    private static final int SECONDS_PER_HOUR = 60 * 60;
29    private static final int SECONDS_PER_DAY = 24 * 60 * 60;
30
31    /**
32     * Returns elapsed time for the given millis, in the following format:
33     * 2d 5h 40m 29s
34     * @param context the application context
35     * @param millis the elapsed time in milli seconds
36     * @return the formatted elapsed time
37     */
38    public static String formatElapsedTime(Context context, double millis) {
39        StringBuilder sb = new StringBuilder();
40        int seconds = (int) Math.floor(millis / 1000);
41
42        int days = 0, hours = 0, minutes = 0;
43        if (seconds > SECONDS_PER_DAY) {
44            days = seconds / SECONDS_PER_DAY;
45            seconds -= days * SECONDS_PER_DAY;
46        }
47        if (seconds > SECONDS_PER_HOUR) {
48            hours = seconds / SECONDS_PER_HOUR;
49            seconds -= hours * SECONDS_PER_HOUR;
50        }
51        if (seconds > SECONDS_PER_MINUTE) {
52            minutes = seconds / SECONDS_PER_MINUTE;
53            seconds -= minutes * SECONDS_PER_MINUTE;
54        }
55        if (days > 0) {
56            sb.append(context.getString(R.string.battery_history_days,
57                    days, hours, minutes, seconds));
58        } else if (hours > 0) {
59            sb.append(context.getString(R.string.battery_history_hours, hours, minutes, seconds));
60        } else if (minutes > 0) {
61            sb.append(context.getString(R.string.battery_history_minutes, minutes, seconds));
62        } else {
63            sb.append(context.getString(R.string.battery_history_seconds, seconds));
64        }
65        return sb.toString();
66    }
67
68    /**
69     * Formats data size in KB, MB, from the given bytes.
70     * @param context the application context
71     * @param bytes data size in bytes
72     * @return the formatted size such as 4.52 MB or 245 KB or 332 bytes
73     */
74    public static String formatBytes(Context context, double bytes) {
75        // TODO: I18N
76        if (bytes > 1000 * 1000) {
77            return String.format("%.2f MB", ((int) (bytes / 1000)) / 1000f);
78        } else if (bytes > 1024) {
79            return String.format("%.2f KB", ((int) (bytes / 10)) / 100f);
80        } else {
81            return String.format("%d bytes", (int) bytes);
82        }
83    }
84}
85