android 利用TrafficStats类获取本应用的流量

public void getData() {        // PackageManager 包管理类        PackageManager packageManager = BrownserActivity.this.getPackageManager();        int PackageUid = 0;        BigDecimal numRx = new BigDecimal("0");        BigDecimal numTx = new BigDecimal("0");        /**         * 循环抓紧所有应用的包名 和当前应用的包名进行匹配操作 把获取到的UID保存到一个临时变量         */        /*for (ApplicationInfo info : packageManager.getInstalledApplications(0)) {            int uid = info.uid;            String packageName = info.packageName;            if (packageName.indexOf("iAssistant") > -1) {                PackageUid = uid;                break;            }        }*/        // 获取当前应用的uid        PackageUid = android.os.Process.myUid();        // TrafficStats类根据应用的UID获取到流量的相关数据        long rx = TrafficStats.getUidRxBytes(PackageUid);// 总接收量        long tx = TrafficStats.getUidTxBytes(PackageUid);// 总发送量        float justLoad = 0f;        Log.i("scott", "本应用本次开机总接收量：" + rx);        Log.i("scott", "本应用本次开机总发送量：" + tx);        if (rx > 0) {            numRx = byteToM(rx);            justLoad = numRx.floatValue() - initData;            initData = numRx.floatValue();        }        if (tx > 0) {            numTx = byteToM(tx);        }        // Toast.makeText(BrownserActivity.this, "总接收量:"+numRx.floatValue()+"M",        // Toast.LENGTH_SHORT).show();        Toast.makeText(BrownserActivity.this, "本次接收量:" + justLoad + "M", Toast.LENGTH_SHORT).show();        Log.i("scott", "转换为(M为单位)后的总接收量：" + numRx.floatValue());        Log.i("scott", "转换为(M为单位)后的总发送量：" + numTx.floatValue());    }    /**     * 字节转换为M     */    private BigDecimal byteToM(long value) {        BigDecimal result = new BigDecimal(Long.toString(value));        result = result.divide(new BigDecimal("1024.0")).divide(new BigDecimal("1024.0"));        return result;    }
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