UsageStatsUtil

package com.android.demo.lileidemo.utils;

import android.app.usage.UsageEvents;
import android.app.usage.UsageStats;
import android.app.usage.UsageStatsManager;
import android.content.Context;

import com.android.demo.lileidemo.constant.AppConstants;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

/**
 * date: 03/25/2020.
 * author: lilei.
 */
public class UsageStatsUtil {
    private static final String TAG = AppConstants.APP_TAG + "UsageStatsUtil ";
    private static volatile UsageStatsUtil mInstance;
    private static final boolean DEBUG = false;
    private static List<UsageStats> mListUsageStats;
    private static UsageStats mUsageStats;

    /**
     * getUsageStatsList.
     *
     * @param context   context.
     * @param beginTime beginTime.
     * @param endTime   endTime.
     * @return Get UsageStats list.
     */
    public static synchronized List<UsageStats> getUsageStatsList(Context context, long beginTime,
                                                                  long endTime) {
        UsageStatsManager usageStatsManager = (UsageStatsManager) context.getSystemService(
            Context.USAGE_STATS_SERVICE);
        List<UsageStats> listUsageStats = usageStatsManager.queryUsageStats(
            UsageStatsManager.INTERVAL_BEST, beginTime, endTime);
        if (null == mListUsageStats) {
            mListUsageStats = new ArrayList<UsageStats>();
        }
        mListUsageStats.clear();

        for (int i = 0; i < listUsageStats.size(); i++) {
            mUsageStats = listUsageStats.get(i);
            String packageName = mUsageStats.getPackageName();
            long totalTimeInForeground = mUsageStats.getTotalTimeInForeground();
            long getLastTimeUsed = mUsageStats.getLastTimeUsed();
            long getFirstTimeStamp = mUsageStats.getFirstTimeStamp();
            int lastEvent = getLastEvent(mUsageStats);
            int launchCount = getLaunchCount(mUsageStats);
            int recentLaunchCount = getRecentPackageLaunchCount(packageName);
            if (DEBUG) {
                LogUtil.d(TAG + "* getUsageStatsList i:" + i + " packageName:" + packageName
                    + " launchCount:" + launchCount + " recentLaunchCount:" + recentLaunchCount
                    + " totalTimeInForeground:" + totalTimeInForeground
                    + " lastEvent:" + lastEvent
                    + " getFirstTimeStamp:" + getFirstTimeStamp
                    + " getLastTimeUsed:" + getLastTimeUsed + " beginTime:" + beginTime);
            }
            if ((totalTimeInForeground > 0 || UsageEvents.Event.MOVE_TO_FOREGROUND == lastEvent)
                && !inOpenAppStatsIgnorePackages(packageName)
                && (getLastTimeUsed > beginTime || getFirstTimeStamp > beginTime)
                && (launchCount == 0 || launchCount > recentLaunchCount)) {
                LogUtil.d(TAG + "* getUsageStatsList add "
                    + " packageName:" + packageName + " lastEvent:" + lastEvent
                    + " launchCount:" + launchCount + " recentLaunchCount:" + recentLaunchCount
                    + " totalTimeInForeground:" + totalTimeInForeground);
                mListUsageStats.add(mUsageStats);
            }
            setRecentPackageLaunchCount(packageName, launchCount);
        }
        if (DEBUG) {
            LogUtil.d(TAG + "getUsageStatsList mListUsageStats.size():"
                + (null == mListUsageStats ? null : mListUsageStats.size()));
        }
        return mListUsageStats;
    }

    private static int getRecentPackageLaunchCount(String packageName) {
        int launchCount =0;//todo
        return launchCount;
    }

    private static void setRecentPackageLaunchCount(String packageName, int launchCount) {
        if (DEBUG) {
            LogUtil.d(TAG + "setRecentPackageLaunchCount packageName:" + packageName
                + " launchCount:" + launchCount);
        }
        //todo
    }

    /**
     * get LaunchCount by reflect.
     * hint: this function can only used before android 8.1.
     * android 8.1 can not use reflect any more.
     *
     * @param usageStats usageStats.
     * @return
     */
    public static int getLaunchCount(UsageStats usageStats) {
        int launchCount = 0;
        try {
            Class c = usageStats.getClass();
            Field field = c.getDeclaredField("mLaunchCount");
            field.setAccessible(true);
            launchCount = field.getInt(usageStats);
        } catch (Exception e) {
            LogUtil.d(TAG + "getLaunchCount() error:" + e.toString());
            e.printStackTrace();
        }
        return launchCount;
    }

    /**
     * get LastEvent by reflect.
     * hint: this function can only used before android 8.1.
     * android 8.1 can not use reflect any more.
     *
     * @param usageStats usageStats.
     * @return
     */
    private static int getLastEvent(UsageStats usageStats) {
        int lastEvent = 0;
        try {
            Class c = usageStats.getClass();
            Field field = c.getDeclaredField("mLastEvent");
            field.setAccessible(true);
            lastEvent = field.getInt(usageStats);
        } catch (Exception e) {
            LogUtil.d(TAG + "getLastEvent() error:" + e.toString());
            e.printStackTrace();
        }
        return lastEvent;
    }

    /**
     * To check package whether in OpenAppStatsIgnorePackages.
     *
     * @param packageName packageName.
     * @return boolean.
     */
    public static boolean inOpenAppStatsIgnorePackages(String packageName) {
        int length = AppConstants.OPEN_APP_STATS_IGNORE_PACKAGES.length;
        for (int i = 0; i < length; i++) {
            if (AppConstants.OPEN_APP_STATS_IGNORE_PACKAGES[i].equals(packageName)) {
                return true;
            }
        }
        return false;
    }

    /**
     * Check whether packageName in UsageStats List.
     *
     * @param packageName    Package name.
     * @param listUsageStats List of UsageStats.
     * @return boolean.
     */
    public static boolean checkInUsageStatsList(String packageName,
                                                List<UsageStats> listUsageStats) {
        for (int i = 0; i < listUsageStats.size(); i++) {
            UsageStats usageStats = listUsageStats.get(i);
            if (packageName.equals(usageStats.getPackageName())) {
                return true;
            }
        }
        return false;
    }

}