android 流量監控實現想法

經過2，3周的時間研究流量的監控，什麼TrafficStats提供的方法，做的時候蛋疼的要屎，2G/3G的流量獲取根本就不准確，至於什麼原因網絡上面也有說，就不講了。經過研究，通過讀取/proc/uid_stat/項目uid/下面的兩個文件，獲取流量信息。再通過自己的邏輯算法，解決了流量監控和統計的問題。可能也有不准確的地方，請多多指導   本監控軟件，實現的是監控一個月的程序使用流量   1，開啟一個服務，每5分鐘跑動一次更新流量，用於能夠准確記錄流量         每一個小時，更新一次流量，用於清除非本月的流量   2，保存流量的時候，進行判斷         a，若是數據庫中保存的   舊流量oldFlow > 文件流量newFlow，說明手機重啟過， 保存流量 = 前一次數據庫保存流量 + 文件流量         b，若是數據庫中保存的   舊流量oldFlow <= 文件流量newFlow，說明軟件消耗了新流量，保存流量=oldFlow-newFlow+前一次數據庫保存流量   3，晚上24點的處理         文件流量不為o的時候，當前一天oldFLow > newFlow，保存流量 = newFlow + 0; 此時oldFlow = newFLow                                              當前一天oldFlow <= newFlow, 保存流量 = newFlow - oldFlow +0; 此時oldFlow = newFlow；     /**  * 關鍵代碼  */ 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); // 保存的舊流量和標准流量 if (oldStandardFlow[0] == 0 && oldStandardFlow[1] == 0 && newFlow != 0) { // 晚上24點後的處理 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); // 保存的舊流量和標准流量 setFlowAfter24(oldStandardFlow, newFlow); } else { // 當天處理 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); } }