| /* |
| * Copyright (C) 2014 Google Inc. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.wearable.jumpingjack; |
| |
| import android.content.Context; |
| import android.content.SharedPreferences; |
| import android.os.Vibrator; |
| import android.preference.PreferenceManager; |
| |
| /** |
| * A utility class for some helper methods. |
| */ |
| public class Utils { |
| |
| private static final int DEFAULT_VIBRATION_DURATION_MS = 200; // in millis |
| private static final String PREF_KEY_COUNTER = "counter"; |
| |
| /** |
| * Causes device to vibrate for the given duration (in millis). If duration is set to 0, then it |
| * will use the <code>DEFAULT_VIBRATION_DURATION_MS</code>. |
| */ |
| public final static void vibrate(Context context, int duration) { |
| if (duration == 0) { |
| duration = DEFAULT_VIBRATION_DURATION_MS; |
| } |
| Vibrator v = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE); |
| v.vibrate(duration); |
| } |
| |
| /** |
| * Saves the counter value in the preference storage. If <code>value</code> |
| * is negative, then the value will be removed from the preferences. |
| */ |
| public static void saveCounterToPreference(Context context, int value) { |
| SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(context); |
| if (value < 0) { |
| // we want to remove |
| pref.edit().remove(PREF_KEY_COUNTER).apply(); |
| } else { |
| pref.edit().putInt(PREF_KEY_COUNTER, value).apply(); |
| } |
| } |
| |
| /** |
| * Retrieves the value of counter from preference manager. If no value exists, it will return |
| * <code>0</code>. |
| */ |
| public static int getCounterFromPreference(Context context) { |
| SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(context); |
| return pref.getInt(PREF_KEY_COUNTER, 0); |
| } |
| |
| } |