Android中获取实时网速（2）

一、实现思路：
1、Android提供有获取当前总流量的方法
2、上一秒减去下一面的流量差便是网速
3、注意计算
二、计算网速的工具类：

package imcs.cb.com.viewapplication.utils; import android.content.Context;import android.net.TrafficStats;import android.os.Handler;import android.os.Message; import java.util.Timer;import java.util.TimerTask; /** * Created by Ricky on 2016/10/13. */public class NetWorkSpeedUtils {    private Context context;    private Handler mHandler;     private long lastTotalRxBytes = 0;    private long lastTimeStamp = 0;     public NetWorkSpeedUtils(Context context, Handler mHandler){        this.context = context;        this.mHandler = mHandler;    }     TimerTask task = new TimerTask() {        @Override        public void run() {            showNetSpeed();        }    };     public void startShowNetSpeed(){        lastTotalRxBytes = getTotalRxBytes();        lastTimeStamp = System.currentTimeMillis();        new Timer().schedule(task, 1000, 1000); // 1s后启动任务，每2s执行一次     }     private long getTotalRxBytes() {        return TrafficStats.getUidRxBytes(context.getApplicationInfo().uid) == TrafficStats.UNSUPPORTED ? 0 :(TrafficStats.getTotalRxBytes()/1024);//转为KB    }     private void showNetSpeed() {        long nowTotalRxBytes = getTotalRxBytes();        long nowTimeStamp = System.currentTimeMillis();        long speed = ((nowTotalRxBytes - lastTotalRxBytes) * 1000 / (nowTimeStamp - lastTimeStamp));//毫秒转换        long speed2 = ((nowTotalRxBytes - lastTotalRxBytes) * 1000 % (nowTimeStamp - lastTimeStamp));//毫秒转换         lastTimeStamp = nowTimeStamp;        lastTotalRxBytes = nowTotalRxBytes;         Message msg = mHandler.obtainMessage();        msg.what = 100;        msg.obj = String.valueOf(speed) + "." + String.valueOf(speed2) + " kb/s";        mHandler.sendMessage(msg);//更新界面    }}

　　三、使用：

private Handler mHnadler = new Handler(){        @Override        public void handleMessage(Message msg) {            switch (msg.what) {                case 100:                    tv_speed.setText("当前网速： " + msg.obj.toString());                    break;            }            super.handleMessage(msg);        }    };     @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);         tv_speed = (TextView) findViewById(R.id.tv_speed);         new NetWorkSpeedUtils(this,mHnadler).startShowNetSpeed();    }

　　参考于：https://blog.csdn.net/xueshao110/article/details/82766390

//-------------------------------------------------------

private long rxtxTotal =0;private DecimalFormat showFloatFormat =new DecimalFormat("0.00");public void updateViewData() {long tempSum = TrafficStats.getTotalRxBytes()+ TrafficStats.getTotalTxBytes();    long rxtxLast = tempSum -rxtxTotal;    double totalSpeed= rxtxLast *1000 /2000d;    rxtxTotal = tempSum;    wangsu.setText("当前网速:" + showSpeed(totalSpeed));  //设置显示当前网速}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;}作者：一曲烟雨伊人醉链接：https://www.jianshu.com/p/377ffb0f24ad来源：简书简书著作权归作者所有，任何形式的转载都请联系作者获得授权并注明出处。

　　然后开启计时器轮询访问updateViewData（）方法即可实现

参考：https://www.jianshu.com/p/377ffb0f24ad

//----------------------------------------------------------------

https://www.csdn.net/gather_27/MtTakg1sNzQ3MC1ibG9n.html

package imcs.cb.com.viewapplication.utils;
import android.content.Context;
import android.net.TrafficStats;
import android.os.Handler;
import android.os.Message;
import java.util.Timer;
import java.util.TimerTask;
/**
* Created by Ricky on 2016/10/13.
*/
public class NetWorkSpeedUtils {
private Context context;
private Handler mHandler;
private long lastTotalRxBytes = 0;
private long lastTimeStamp = 0;
public NetWorkSpeedUtils(Context context, Handler mHandler){
this.context = context;
this.mHandler = mHandler;
}
TimerTask task = new TimerTask() {
@Override
public void run() {
showNetSpeed();
}
};
public void startShowNetSpeed(){
lastTotalRxBytes = getTotalRxBytes();
lastTimeStamp = System.currentTimeMillis();
new Timer().schedule(task, 1000, 1000); // 1s后启动任务，每2s执行一次
}
private long getTotalRxBytes() {
return TrafficStats.getUidRxBytes(context.getApplicationInfo().uid) == TrafficStats.UNSUPPORTED ? 0 :(TrafficStats.getTotalRxBytes()/ 1024); //转为KB
}
private void showNetSpeed() {
long nowTotalRxBytes = getTotalRxBytes();
long nowTimeStamp = System.currentTimeMillis();
long speed = ((nowTotalRxBytes - lastTotalRxBytes) * 1000 / (nowTimeStamp - lastTimeStamp)); //毫秒转换
long speed2 = ((nowTotalRxBytes - lastTotalRxBytes) * 1000 % (nowTimeStamp - lastTimeStamp)); //毫秒转换
lastTimeStamp = nowTimeStamp;
lastTotalRxBytes = nowTotalRxBytes;
Message msg = mHandler.obtainMessage();
msg.what = 100;
msg.obj = String.valueOf(speed) + "." + String.valueOf(speed2) + " kb/s";
mHandler.sendMessage(msg); //更新界面
}
}

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