/*
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* Copyright (C) 2015 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.camera.app;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.preference.PreferenceManager;
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import com.android.camera.stats.profiler.Profile;
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import com.android.camera.stats.profiler.Profiler;
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import com.android.camera.stats.profiler.Profilers;
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public class FirstRunDetector {
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private static final long UNKNOWN = -1;
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// Default SharedPreferences key for when the application was first used.
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private static final String CLIENT_FIRST_USE_TIME = "client_first_use_time_millis";
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private static class Singleton {
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private static final FirstRunDetector INSTANCE = new FirstRunDetector(
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Profilers.instance().guard());
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}
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public static FirstRunDetector instance() {
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return Singleton.INSTANCE;
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}
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private final Profile mProfile;
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private long mTimeOfFirstRun;
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/** Flag set to true if and only if first run of application is detected. */
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private boolean mIsFirstRun = false;
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private FirstRunDetector(Profiler profiler) {
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mProfile = profiler.create("FirstRunDetector getTimeOfFirstRun");
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}
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/**
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* Return true if this is the first time the app was opened.
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*/
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public boolean isFirstRun() {
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return mIsFirstRun;
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}
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/**
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* Return true if this is the first time the app was opened.
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*/
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public long getTimeOfFirstRun() {
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return mTimeOfFirstRun;
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}
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/**
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* Clear the first run flag.
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*/
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public void clear() {
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mIsFirstRun = false;
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}
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/**
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* Returns time the app was first used, or UNKNOWN if the
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* client is too old. This could be moved a separate utility class.
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*
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* @param context Application context.
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*/
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public void initializeTimeOfFirstRun(Context context) {
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mProfile.start();
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SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
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mProfile.mark("PreferenceManager.getDefaultSharedPreferences");
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// Read time of first installation.
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long timeOfFirstUseMillis = preferences.getLong(CLIENT_FIRST_USE_TIME, 0);
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mProfile.mark("preferences.getLong");
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// Write installation time if not set.
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if (timeOfFirstUseMillis == 0) {
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SharedPreferences cameraPrefs = context.getSharedPreferences(
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context.getPackageName() + "_preferences_camera", Context.MODE_PRIVATE);
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mProfile.mark("getSharedPreferences");
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// If we can find previous Shared Preferences, this is not a new install.
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boolean isUpgrade = cameraPrefs.getAll().size() > 0 || preferences.getAll().size() > 0;
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// Preference CLIENT_FIRST_USE_TIME is set to UNKNOWN for preference
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// upgrades and the actual first use time for new installs. We call
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// System.currentTimeMillis() to match the log timebase.
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timeOfFirstUseMillis = isUpgrade ? UNKNOWN : System.currentTimeMillis();
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preferences.edit().putLong(CLIENT_FIRST_USE_TIME, timeOfFirstUseMillis).apply();
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mProfile.mark("preferences.edit()");
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if (!isUpgrade) {
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mIsFirstRun = true;
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}
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}
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mTimeOfFirstRun = timeOfFirstUseMillis;
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mProfile.stop();
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}
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}
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