安卓显示实时网速

开发中经常遇到需要显示实时网速的需求，方法很多，这里贴一个我用过的方法，代码不多，拿来就能用



package com.a4kgarden.mynetspeed;

    import android.content.Context;
    import android.net.TrafficStats;
    import android.os.Handler;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.widget.TextView;

    import java.text.DecimalFormat;
    import java.util.Timer;
    import java.util.TimerTask;

    public class MainActivity extends AppCompatActivity {
        private long rxtxTotal = 0;
        private long mobileRecvSum = 0;
        private long mobileSendSum = 0;
        private long wlanRecvSum = 0;
        private long wlanSendSum = 0;
        private DecimalFormat showFloatFormat = new DecimalFormat("0.00");
        private TextView tvspeed;
        private Timer timer;
        private Handler handler = new Handler();

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            tvspeed = (TextView) findViewById(R.id.tvspeed);

            timer = new Timer();
            timer.scheduleAtFixedRate(new RefreshTask(), 0L, (long) 2000d);

        }



        public void updateViewData(Context context) {
            long tempSum = TrafficStats.getTotalRxBytes()
                    + TrafficStats.getTotalTxBytes();
            long rxtxLast = tempSum - rxtxTotal;
            double totalSpeed = rxtxLast * 1000 / 2000d;
            rxtxTotal = tempSum;
            tvspeed.setText(showSpeed(totalSpeed));
        }
        private String showSpeed(double speed) {
            String speedString;
            if (speed >= 1048576d) {
                speedString = showFloatFormat.format(speed / 1048576d) + "MB/s";
            } else {
                speedString = showFloatFormat.format(speed / 1024d) + "KB/s";
            }
            return speedString;
        }
        class RefreshTask extends TimerTask {

            @Override
            public void run() {
                // 当前有悬浮窗显示，则更新内存数据。
                rxtxTotal = TrafficStats.getTotalRxBytes()
                        + TrafficStats.getTotalTxBytes();
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        updateViewData(getApplicationContext());
                    }
                });
            }

        }
    }