android 流量监控实现想法

经过2，3周的时间研究流量的监控，什么TrafficStats提供的方法，做的时候蛋疼的要屎，2G/3G的流量获取根本就不准确，至于什么原因网络上面也有说，就不讲了。经过研究，通过读取/proc/uid_stat/项目uid/下面的两个文件，获取流量信息。再通过自己的逻辑算法，解决了流量监控和统计的问题。可能也有不准确的地方，请多多指导

本监控软件，实现的是监控一个月的程序使用流量

1，开启一个服务，每5分钟跑动一次更新流量，用于能够准确记录流量 每一个小时，更新一次流量，用于清除非本月的流量

2，保存流量的时候，进行判断 a，若是数据库中保存的 旧流量oldFlow > 文件流量newFlow，说明手机重启过， 保存流量 = 前一次数据库保存流量 + 文件流量
b，若是数据库中保存的 旧流量oldFlow <= 文件流量newFlow，说明软件消耗了新流量，保存流量=oldFlow-newFlow+前一次数据库保存流量

3，晚上24点的处理 文件流量不为o的时候，当前一天oldFLow > newFlow，保存流量 = newFlow + 0; 此时oldFlow = newFLow
当前一天oldFlow <= newFlow, 保存流量 = newFlow - oldFlow +0; 此时oldFlow = newFlow；


/** * 关键代码 */FlowInfo uidInfo;
public List<FlowInfo> getGPRSData() {
List<FlowInfo> uidList = new ArrayList<FlowInfo>();PackageManager pm = context.getPackageManager();List<PackageInfo> packinfos = pm.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES| PackageManager.GET_PERMISSIONS);
long newFlow = 0;long[] oldStandardFlow = null;
String date = TimeUtil.getInstance().getStringDate();
for (PackageInfo info : packinfos) {uidInfo = new FlowInfo();String[] premissions = info.requestedPermissions;if (premissions != null && premissions.length > 0) {for (String premission : premissions) {if ("android.permission.INTERNET".equals(premission)) {int uid = info.applicationInfo.uid;uidInfo.setUid(uid);newFlow = Long.valueOf(getSndFlowByUid(uid))+ Long.valueOf(getRcvFlowByUid(uid));tableHelp = TableHelp.getInstance(context,"FlowMonitors.db", 1);sqlite = tableHelp.getSqliteDatabase();oldStandardFlow = tableHelp.getOldStandardFlow(sqlite,uid, date); // 保存的旧流量和标准流量if (oldStandardFlow[0] == 0 && oldStandardFlow[1] == 0&& newFlow != 0) { // 晚上24点后的处理int d = Integer.valueOf(TimeUtil.getInstance().getStringDate1());String d2;if (d < 10) {d2 = TimeUtil.getInstance().getYearAndMonth()+ "-0" + (d - 1);} else {d2 = TimeUtil.getInstance().getYearAndMonth()+ "-" + (d - 1);}sqlite = tableHelp.getSqliteDatabase();oldStandardFlow = tableHelp.getOldStandardFlow(sqlite, uid, d2); // 保存的旧流量和标准流量setFlowAfter24(oldStandardFlow, newFlow);} else { // 当天处理setFlowToday(oldStandardFlow, newFlow);}uidInfo.setDate(date);uidList.add(uidInfo);}}}}return uidList;}
public void setFlowToday(long[] oldStandardFlow, long newFlow) {if (oldStandardFlow[0] > newFlow) {uidInfo.setOldFlow(newFlow);newFlow = oldStandardFlow[1] + newFlow;uidInfo.setFlow(newFlow);} else { uidInfo.setOldFlow(newFlow);newFlow = newFlow - oldStandardFlow[0] + oldStandardFlow[1];uidInfo.setFlow(newFlow);}}public void setFlowAfter24(long[] oldStandardFlow, long newFlow) {if (oldStandardFlow[0] > newFlow) { uidInfo.setOldFlow(newFlow);newFlow = 0 + newFlow;uidInfo.setFlow(newFlow);} else {uidInfo.setOldFlow(newFlow);newFlow = newFlow - oldStandardFlow[0] + 0;uidInfo.setFlow(newFlow);}}