关于android:Android获取前台应用信息

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    /**
     * 获取前台利用信息
     *
     * @return 前台利用信息（蕴含前台利用包名和前台利用类名）*/
    public ForegroundInfo getForegroundInfo() {if (!isStatAccessPermissionSet()) {
            // 疏导用户关上权限
            Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
            sContext.startActivity(intent);
            return null;
        }
        long time = System.currentTimeMillis();
        long duration = 600 * 1000;
        UsageStatsManager usageStatsManager = (UsageStatsManager) sContext.getSystemService(Context.USAGE_STATS_SERVICE);
        UsageEvents usageEvents = usageStatsManager.queryEvents(time - duration, time);
        UsageEvents.Event event = new UsageEvents.Event();
        String foregroundPackageName = "";
        String foregroundClassName = "";
        while (usageEvents.hasNextEvent()) {usageEvents.getNextEvent(event);
            if (event.getEventType() == UsageEvents.Event.ACTIVITY_RESUMED) {if (TextUtils.equals(sContext.getPackageName(), event.getPackageName())) {continue;}
                foregroundPackageName = event.getPackageName();
                foregroundClassName = event.getClassName();}
        }
        if (foregroundPackageName.isEmpty() || foregroundClassName.isEmpty()) {return null;}
        return new ForegroundInfo(foregroundPackageName, foregroundClassName);
    }

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