我的Android成长之路（12）----监测自身APP流量

此方法主要用到系统API提供的SharedPreferences和TrafficStats。

当然也可以用数据库，但是原理是一样的。

思路是每次完成连网服务后，都调用一次saveFlow()方法，具体方法如下：

/**
     * 保存改变后的流量使用量
     */
    public void saveFlow(){
        if (sp == null){
            sp = getSharedPreferences(LoginActivity.username, Context.MODE_PRIVATE);
        }
        long oldin = sp.getLong("inFlow-old",0) ;
        long oldout = sp.getLong("outFlow-old",0) ;
        long allin = sp.getLong("inFlow",0) ;
        long allout = sp.getLong("outFlow",0) ;
        long time = sp.getLong("flow-time",0) ;
        SharedPreferences.Editor editor = sp.edit();
        if (time == 0 || !getMoth4Long(System.currentTimeMillis()).equals(getMoth4Long(time))){
            oldin = 0 ;
            oldout = 0 ;
            allin = 0 ;
            allout = 0 ;
            editor.putLong("flow-time", System.currentTimeMillis());
        }
        long in = TrafficStats.getUidRxBytes(getApplicationInfo().uid) ;
        long out = TrafficStats.getUidTxBytes(getApplicationInfo().uid) ;
        if (in >= oldin && out >= oldout){
            editor.putLong("inFlow", allin + in-oldin);
            editor.putLong("outFlow", allout + out-oldout);
        }else {
            editor.putLong("inFlow", allin + in);
            editor.putLong("outFlow", allout + out);
        }
        editor.putLong("inFlow-old", in);
        editor.putLong("outFlow-old", out);
        editor.commit();

    }

每月更新一次流量统计，所以有时间判断。

private String getMoth4Long(Long time){
        SimpleDateFormat sDateFormat = new SimpleDateFormat("MM");
        Date date = new Date(time) ;
        return sDateFormat.format(date) ;
    }

获取手机指定 UID 对应的应程序用通过所有网络方式接收的字节流量总数(包括 wifi)
TrafficStats.getUidRxBytes(getApplicationInfo().uid);
获取手机指定 UID 对应的应用程序通过所有网络方式发送的字节流量总数(包括 wifi)
TrafficStats.getUidTxBytes(getApplicationInfo().uid); 

以上得到的是所有流量（包括WiFi），但是实际上只想监听移动数据的，怎么办呢。

很简单，只需要在每次保存前判断一下当前网络状况，如果是移动数据的就添加，否则不加，得到的就是移动数据的了。

/**
     * 保存改变后的流量使用量
     */
    public synchronized void saveFlow(){
        if (sp == null){
            sp = getSharedPreferences(LoginActivity.username, Context.MODE_PRIVATE);
        }
        long oldin = sp.getLong("inFlow-old",0) ;
        long oldout = sp.getLong("outFlow-old",0) ;
        long allin = sp.getLong("inFlow",0) ;
        long allout = sp.getLong("outFlow",0) ;
        long innet = sp.getLong("inFlow-net",0) ;
        long outnet = sp.getLong("outFlow-net",0) ;
        long time = sp.getLong("flow-time",0) ;
        SharedPreferences.Editor editor = sp.edit();
        if (time == 0 || !getMoth4Long(System.currentTimeMillis()).equals(getMoth4Long(time))){ //隔月或者第一次
            oldin = 0 ;
            oldout = 0 ;
            allin = 0 ;
            allout = 0 ;
            innet = 0 ;
            outnet = 0 ;
            editor.putLong("flow-time", System.currentTimeMillis());
        }
        long in = TrafficStats.getUidRxBytes(getApplicationInfo().uid) ;
        long out = TrafficStats.getUidTxBytes(getApplicationInfo().uid) ;
        int type = getNetType() ;
        if (in >= oldin && out >= oldout){  //没关机
            editor.putLong("inFlow", allin + in-oldin);
            editor.putLong("outFlow", allout + out-oldout);
            if (type != -1 && type != 1){
                editor.putLong("inFlow-net", innet + in-oldin);
                editor.putLong("outFlow-net", outnet + out-oldout);
            }
        }else { //关过机
            editor.putLong("inFlow", allin + in);
            editor.putLong("outFlow", allout + out);
            if (type != -1 && type != 1){
                editor.putLong("inFlow-net", innet + in);
                editor.putLong("outFlow-net", outnet + out);
            }
        }
        editor.putLong("inFlow-old", in);
        editor.putLong("outFlow-old", out);
        editor.commit();

    }


//返回值 -1：没有网络  1：WIFI网络2：wap网络3：net网络
    public int getNetType() {
        int netType = -1;
        ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
        if(networkInfo==null)
        {
            return netType;
        }
        int nType = networkInfo.getType();
        if(nType==ConnectivityManager.TYPE_MOBILE)
        {
            if(networkInfo.getExtraInfo().toLowerCase().equals("cmnet"))
            {
                netType = 3;
            }
            else
            {
                netType = 2;
            }
        }
        else if(nType==ConnectivityManager.TYPE_WIFI)
        {
            netType = 1;
        }
        return netType;
    }

如果想要监控别的APP，建立一个service，每秒钟运行一次就行了。