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네트워크 스캐너를 구현하고 있습니다. ip 주소를 ping합니다. ping가 반환되면 Node 클래스를 사용하여 Node를 만듭니다. 그러나 doinbackground()에서 publishupdate 메서드를 사용하려고하면 오류가 발생합니다. 또한 onprogressupdate() 메서드는 수퍼 클래스를 재정의하지 않는다고 말합니다. 구현에있어 문제점이 있습니다. 나는 설명서를 읽고 있지만 그것을 이해할 수는 없다. 어떤 도움을 주셔서 감사합니다. 감사합니다Asynctask 클래스의 publishupdate 메소드를 수정하는 방법
package com.example.android.droidscanner;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;
/**
* Created by jlvaz on 3/1/2017.
*/
public class IpScanActivity extends AppCompatActivity {
String ip;
String mac;
ArrayList<Node> hostList;
ListView networkScan;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.scan_list);
hostList = new ArrayList<>();
//inflating adapter
networkScan = (ListView) findViewById(R.id.scan_list);
NodeAdapter networkAdapter = new NodeAdapter(this, R.layout.list_item, hostList);
networkScan.setAdapter(networkAdapter);
//scanning network
TaskScanNetwork scanNetwork = new TaskScanNetwork();
scanNetwork.execute();
}
/*
* AscynTask to scan the network
* you should try different timeout for your network/devices
* it will try to detect localhost ip addres and subnet. then
* it will use subnet to scan network
*
*/
private class TaskScanNetwork extends AsyncTask<Void, String, Void> {
String localIp;
String mac;
String subnet;
static final int lower = 1;
static final int upper = 254;
static final int timeout = 1000;
@Override
protected void onPreExecute() {
WifiManager wifiMan = (WifiManager) getSystemService(WIFI_SERVICE);
WifiInfo wifiInfo = wifiMan.getConnectionInfo();
int ipAddress = wifiInfo.getIpAddress();
localIp = String.format("%d.%d.%d.%d", (ipAddress & 0xff),(ipAddress >> 8 & 0xff),(ipAddress >> 16 & 0xff),(ipAddress >> 24 & 0xff));
subnet = ip.substring(0, ip.lastIndexOf("."));
hostList.clear();
//textResult.setText("Scanning Network...");
}
@Override
protected Void doInBackground(Void... params) {
for (int i = lower; i <= upper; i++) {
String host = subnet + "." + i;
Log.v("Host: ", host);
try {
InetAddress inetAddress = InetAddress.getByName(host);
if (inetAddress.isReachable(timeout)) {
Node newNode = new Node(host);
publishProgress(newNode);
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onProgressUpdate(Node... values) {
hostList.add(values[0]);
networkScan.deferNotifyDataSetChanged();
}
@Override
protected void onPostExecute(Void aVoid) {
//result.setText("Live Hosts: ");
}
}
}
노드 클래스
package com.example.android.droidscanner;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
/**
* Created by george on 2/14/17.
*/
public class Node {
String ip;
String mac;
String CanonicalHostName;
String HostName;
String remark;
boolean isReachable;
Node(String ip){
this.ip = ip;
//this.mac = mac;
this.isReachable = true;
}
public String getIp() {
return ip;
}
public String getHostName() {
return HostName;
}
public String getMac() {
return mac;
}
public String getRemark() {
return remark;
}
public boolean isReachable() {
return isReachable;
}
@Override
public String toString() {
return "IP: " + ip + "\n" +
"MAC: " + mac + "\n" +
"CanonicalHostName:\t" + CanonicalHostName + "\n" +
"HostName:\t" + HostName + "\n" +
"isReachable: " + isReachable +
"\n" + remark;
}
private void queryHost(){
try {
InetAddress inetAddress = InetAddress.getByName(ip);
CanonicalHostName = inetAddress.getCanonicalHostName();
HostName = inetAddress.getHostName();
} catch (UnknownHostException e) {
e.printStackTrace();
remark = e.getMessage();
} catch (IOException e) {
e.printStackTrace();
remark = e.getMessage();
}
}
}
오류로 NodeAdapter 클래스
public class NodeAdapter extends ArrayAdapter<Node>{
public NodeAdapter(Context context, int num, ArrayList<Node> allHost) {
super(context, 0, allHost);
}
@NonNull
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// Get the data item for this position
Node host = getItem(position);
// Check if an existing view is being reused, otherwise inflate the view
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.list_item, parent, false);
}
// Lookup view for data population
TextView nodeIpTxtView = (TextView) convertView.findViewById(R.id.node_ip);
TextView nodeMacTxtView = (TextView) convertView.findViewById(R.id.node_mac);
// Populate the data into the template view using the data object
nodeIpTxtView.setText(host.getIp());
nodeMacTxtView.setText(host.getMac());
// Return the completed view to render on screen
return convertView;
}
}
감사 – miatech
순이익은 ... 버디 – brindy