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;
    }