Android 如何获得正确的互联网速度（实时）？

我正在创建一个实时的互联网速度表应用程序，它每秒提供互联网的当前速度。 例如

我使用这个代码，但它给了我不正确的输出。那么我们怎样才能得到正确的速度呢

import android.net.TrafficStats;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;
import android.os.SystemClock;


public class TrafficSpeedMeasurer {

    private final SamplingHandler mHandler;
    private final TrafficType mTrafficType;
    private ITrafficSpeedListener mTrafficSpeedListener;
    private long mLastTimeReading;
    private long mPreviousUpStream = -1;
    private long mPreviousDownStream = -1;

    public TrafficSpeedMeasurer(TrafficType trafficType) {
        mTrafficType = trafficType;
        HandlerThread thread = new HandlerThread("ParseThread");
        thread.start();
        mHandler = new SamplingHandler(thread.getLooper());
    }

    public void registerListener(ITrafficSpeedListener iTrafficSpeedListener) {
        mTrafficSpeedListener = iTrafficSpeedListener;
    }

    public void removeListener() {
        mTrafficSpeedListener = null;
    }

    public void startMeasuring() {
        mHandler.startSamplingThread();
        mLastTimeReading = SystemClock.elapsedRealtime();
    }

    public void stopMeasuring() {
        mHandler.stopSamplingThread();
        finalReadTrafficStats();
    }

    private void readTrafficStats() {
        long newBytesUpStream = (mTrafficType == TrafficType.MOBILE ? TrafficStats.getMobileTxBytes() : TrafficStats.getTotalTxBytes()) * 1024;
        long newBytesDownStream = (mTrafficType == TrafficType.MOBILE ? TrafficStats.getMobileRxBytes() : TrafficStats.getTotalRxBytes()) * 1024;

        long byteDiffUpStream = newBytesUpStream - mPreviousUpStream;
        long byteDiffDownStream = newBytesDownStream - mPreviousDownStream;

        synchronized (this) {
            long currentTime = SystemClock.elapsedRealtime();
            double bandwidthUpStream = 0;
            double bandwidthDownStream = 0;

            if (mPreviousUpStream >= 0) {
                bandwidthUpStream = (byteDiffUpStream) * 1.0 / (currentTime - mLastTimeReading);
            }
            if (mPreviousDownStream >= 0) {
                bandwidthDownStream = (byteDiffDownStream) * 1.0 / (currentTime - mLastTimeReading);
            }
            if (mTrafficSpeedListener != null) {
                mTrafficSpeedListener.onTrafficSpeedMeasured(bandwidthUpStream, bandwidthDownStream);
            }

            mLastTimeReading = currentTime;
        }

        mPreviousDownStream = newBytesDownStream;
        mPreviousUpStream = newBytesUpStream;
    }

    private void finalReadTrafficStats() {
        readTrafficStats();
        mPreviousUpStream = -1;
        mPreviousDownStream = -1;
    }

    public enum TrafficType {
        MOBILE,
        ALL
    }

    private class SamplingHandler extends Handler {

        private static final long SAMPLE_TIME = 1000;
        private static final int MSG_START = 1;

        private SamplingHandler(Looper looper) {
            super(looper);
        }

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case MSG_START:
                    readTrafficStats();
                    sendEmptyMessageDelayed(MSG_START, SAMPLE_TIME);
                    break;
                default:
                    throw new IllegalArgumentException("Unknown what=" + msg.what);
            }
        }

        void startSamplingThread() {
            sendEmptyMessage(SamplingHandler.MSG_START);
        }

        void stopSamplingThread() {
            removeMessages(SamplingHandler.MSG_START);
        }

    }

}

我希望每秒钟都能获得正确的互联网速度

在清单文件中，我包含了

“访问网络状态”

权限