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我正在做一个项目。我需要找出每秒的下载和上传速度......到目前为止,我已经找出了传输和接收的总字节数。任何帮助都感激不尽。这是我的代码..

    mStartRX = TrafficStats.getTotalRxBytes();
    mStartTX = TrafficStats.getTotalTxBytes();

    if (mStartRX != TrafficStats.UNSUPPORTED
            && mStartTX != TrafficStats.UNSUPPORTED) {

        mIsStatSupported = true;
    } 

        long rxBytes = TrafficStats.getTotalRxBytes() - mStartRX;
        txtRX.setText(Long.toString(rxBytes) + " bytes");
        long txBytes = TrafficStats.getTotalTxBytes() - mStartTX;
        txtTX.setText(Long.toString(txBytes) + " bytes");
        int linkSpeed = mWifi.getConnectionInfo().getRssi();
        txtWifi.setText(String.valueOf(linkSpeed) + " dBm"); 
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