1 <?xml version="1.0" encoding="utf-8"?>
  2 <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     xmlns:app="http://schemas.android.com/apk/res-auto"
  4     xmlns:tools="http://schemas.android.com/tools"
  5     android:layout_width="match_parent"
  6     android:layout_height="match_parent"
  7     tools:context=".PortScan">
  8 
  9     <TextView
 10         android:id="@+id/textView3"
 11         android:layout_width="75dp"
 12         android:layout_height="26dp"
 13         android:layout_marginBottom="8dp"
 14         android:layout_marginEnd="8dp"
 15         android:layout_marginStart="8dp"
 16         android:layout_marginTop="8dp"
 17         android:text="PortMin"
 18         android:textColor="#FF00FF"
 19         android:textSize="18sp"
 20         app:layout_constraintBottom_toBottomOf="parent"
 21         app:layout_constraintEnd_toEndOf="parent"
 22         app:layout_constraintHorizontal_bias="0.0"
 23         app:layout_constraintStart_toStartOf="parent"
 24         app:layout_constraintTop_toTopOf="parent"
 25         app:layout_constraintVertical_bias="0.25" />
 26 
 27     <TextView
 28         android:id="@+id/textView4"
 29         android:layout_width="75dp"
 30         android:layout_height="26dp"
 31         android:layout_marginBottom="8dp"
 32         android:layout_marginEnd="8dp"
 33         android:layout_marginStart="8dp"
 34         android:layout_marginTop="8dp"
 35         android:text="PortMax"
 36         android:textColor="#FF00FF"
 37         android:textSize="18sp"
 38         app:layout_constraintBottom_toBottomOf="parent"
 39         app:layout_constraintEnd_toEndOf="parent"
 40         app:layout_constraintHorizontal_bias="0.65"
 41         app:layout_constraintStart_toStartOf="parent"
 42         app:layout_constraintTop_toTopOf="parent"
 43         app:layout_constraintVertical_bias="0.25" />
 44 
 45     <TextView
 46         android:id="@+id/textView"
 47         android:layout_width="137dp"
 48         android:layout_height="42dp"
 49         android:layout_marginBottom="8dp"
 50         android:layout_marginEnd="8dp"
 51         android:layout_marginStart="8dp"
 52         android:layout_marginTop="8dp"
 53         android:text="PortScan"
 54         android:textColor="#FF00FF"
 55         android:textSize="30sp"
 56         app:layout_constraintBottom_toBottomOf="parent"
 57         app:layout_constraintEnd_toEndOf="parent"
 58         app:layout_constraintHorizontal_bias="0.05"
 59         app:layout_constraintStart_toStartOf="parent"
 60         app:layout_constraintTop_toTopOf="parent"
 61         app:layout_constraintVertical_bias="0.00999999" />
 62 
 63     <TextView
 64         android:id="@+id/textView2"
 65         android:layout_width="75dp"
 66         android:layout_height="26dp"
 67         android:layout_marginBottom="8dp"
 68         android:layout_marginEnd="8dp"
 69         android:layout_marginStart="8dp"
 70         android:layout_marginTop="8dp"
 71         android:text="IP"
 72         android:textColor="#FF00FF"
 73         android:textSize="18sp"
 74         app:layout_constraintBottom_toBottomOf="parent"
 75         app:layout_constraintEnd_toEndOf="parent"
 76         app:layout_constraintHorizontal_bias="0.0"
 77         app:layout_constraintStart_toStartOf="parent"
 78         app:layout_constraintTop_toTopOf="parent"
 79         app:layout_constraintVertical_bias="0.13999999" />
 80 
 81     <EditText
 82         android:id="@+id/ipedit"
 83         android:layout_width="267dp"
 84         android:layout_height="42dp"
 85         android:layout_marginBottom="8dp"
 86         android:layout_marginEnd="8dp"
 87         android:layout_marginStart="8dp"
 88         android:layout_marginTop="8dp"
 89         android:ems="10"
 90         android:inputType="textPersonName"
 91         android:text="127.0.0.1"
 92         android:textSize="18sp"
 93         app:layout_constraintBottom_toBottomOf="parent"
 94         app:layout_constraintEnd_toEndOf="parent"
 95         app:layout_constraintHorizontal_bias="1.0"
 96         app:layout_constraintStart_toStartOf="parent"
 97         app:layout_constraintTop_toTopOf="parent"
 98         app:layout_constraintVertical_bias="0.13" />
 99 
100     <EditText
101         android:id="@+id/portmin"
102         android:layout_width="80dp"
103         android:layout_height="42dp"
104         android:layout_marginBottom="8dp"
105         android:layout_marginEnd="8dp"
106         android:layout_marginStart="8dp"
107         android:layout_marginTop="8dp"
108         android:ems="10"
109         android:inputType="textPersonName"
110         android:text="1"
111         app:layout_constraintBottom_toBottomOf="parent"
112         app:layout_constraintEnd_toEndOf="parent"
113         app:layout_constraintHorizontal_bias="0.35"
114         app:layout_constraintStart_toStartOf="parent"
115         app:layout_constraintTop_toTopOf="parent"
116         app:layout_constraintVertical_bias="0.239" />
117 
118     <EditText
119         android:id="@+id/portmax"
120         android:layout_width="80dp"
121         android:layout_height="42dp"
122         android:layout_marginBottom="8dp"
123         android:layout_marginEnd="8dp"
124         android:layout_marginStart="8dp"
125         android:layout_marginTop="8dp"
126         android:ems="10"
127         android:inputType="textPersonName"
128         android:text="65535"
129         app:layout_constraintBottom_toBottomOf="parent"
130         app:layout_constraintEnd_toEndOf="parent"
131         app:layout_constraintHorizontal_bias="1.0"
132         app:layout_constraintStart_toStartOf="parent"
133         app:layout_constraintTop_toTopOf="parent"
134         app:layout_constraintVertical_bias="0.239" />
135 
136     <Button
137         android:id="@+id/button"
138         android:layout_width="369dp"
139         android:layout_height="42dp"
140         android:layout_marginBottom="8dp"
141         android:layout_marginEnd="8dp"
142         android:layout_marginStart="8dp"
143         android:layout_marginTop="180dp"
144         android:onClick="play"
145         android:text="play"
146         android:textColor="#FF00FF"
147         app:layout_constraintBottom_toBottomOf="parent"
148         app:layout_constraintEnd_toEndOf="parent"
149         app:layout_constraintStart_toStartOf="parent"
150         app:layout_constraintTop_toTopOf="parent"
151         app:layout_constraintVertical_bias="0.005" />
152 
153     <TextView
154         android:id="@+id/tv"
155         android:layout_width="368dp"
156         android:layout_height="23dp"
157         android:layout_marginBottom="16dp"
158         android:layout_marginEnd="8dp"
159         android:layout_marginStart="8dp"
160         android:layout_marginTop="8dp"
161         android:text="ing..."
162         android:textColor="#FF00FF"
163         android:textSize="14sp"
164         app:layout_constraintBottom_toBottomOf="parent"
165         app:layout_constraintEnd_toEndOf="parent"
166         app:layout_constraintStart_toStartOf="parent"
167         app:layout_constraintTop_toBottomOf="@+id/button"
168         app:layout_constraintVertical_bias="1.0" />
169 
170     <ListView
171         android:id="@+id/listview"
172         android:layout_width="378dp"
173         android:layout_height="287dp"
174         android:layout_marginBottom="8dp"
175         android:layout_marginEnd="8dp"
176         android:layout_marginStart="16dp"
177         android:layout_marginTop="8dp"
178         app:layout_constraintBottom_toTopOf="@+id/tv"
179         app:layout_constraintEnd_toEndOf="parent"
180         app:layout_constraintStart_toStartOf="parent"
181         app:layout_constraintTop_toBottomOf="@+id/button"
182         app:layout_constraintVertical_bias="1.0" />
183 
184 </android.support.constraint.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.shawna.portscan">
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".PortScan">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

  1 package com.shawna.portscan;
  2 
  3 import android.os.Handler;
  4 import android.os.Message;
  5 import android.support.v7.app.AlertDialog;
  6 import android.support.v7.app.AppCompatActivity;
  7 import android.os.Bundle;
  8 import android.view.View;
  9 import android.widget.ArrayAdapter;
 10 import android.widget.EditText;
 11 import android.widget.ListView;
 12 import android.widget.TextView;
 13 
 14 import java.net.InetSocketAddress;
 15 import java.net.Socket;
 16 import java.net.SocketAddress;
 17 import java.util.concurrent.ExecutorService;
 18 import java.util.concurrent.Executors;
 19 
 20 public class PortScan extends AppCompatActivity {
 21 
 22     int portmin = 1;//最小ip取值
 23     int portmax = 65535;//最大ip取值
 24     String ip;//ip地址
 25     String[] ports = new String[0];//成功连接的端口保存数组
 26     String portstext;//成功连接的端口文本
 27 
 28     @Override
 29     protected void onCreate(Bundle savedInstanceState) {
 30         super.onCreate(savedInstanceState);
 31         setContentView(R.layout.activity_port_scan);
 32 
 33         //状态条显示初始化信息
 34         thistext("处理器核心数 " + thisGetCPUnum() + " 核，将使用 " + thisGetCPUnum()*2 + " 线程执行...");
 35     }
 36 
 37     public void play(View view){
 38         //获取各个编辑框组件的内容
 39         EditText ipEdit = (EditText) findViewById(R.id.ipedit);
 40         EditText piedit = (EditText) findViewById(R.id.portmin);
 41         EditText paedit = (EditText) findViewById(R.id.portmax);
 42         ip = ipEdit.getText().toString();
 43         portmin = Integer.parseInt(piedit.getText().toString());
 44         portmax = Integer.parseInt(paedit.getText().toString());
 45 
 46         //判断输入的内容是否合法
 47         if (iftext() == false){
 48             AlertDialog.Builder message = new AlertDialog.Builder(this);
 49             message.setMessage("有数据漏填，请检查！");
 50             AlertDialog m1 = message.create();
 51             m1.show();
 52             return;
 53         }
 54 
 55         //启动线程执行任务
 56         thisiflink thisiflink = new thisiflink();
 57         thisiflink.start();
 58     }
 59 
 60     //获取线程传出的消息更新UI
 61     private Handler.Callback mCallback = new Handler.Callback() {
 62         @Override
 63         public boolean handleMessage(Message msg) {
 64             if (msg.what == 1) {
 65                 if (msg.obj == "更新UI列表"){
 66                     if (portstext == null || portstext.length() == 0) {
 67                         return false;
 68                     } else {
 69                         //以#为分隔符分割文本
 70                         ports = portstext.split("\\#");
 71                         //调用函数更新UI状态条
 72                         thislist(ports);
 73                     }
 74                 }
 75             }else if (msg.what == 1011){
 76                 if (msg.obj == null || msg.obj.toString().length() == 0){
 77                     return false;
 78                 }else {
 79                     //调用函数更新UI状态条
 80                     thistext(msg.obj.toString());
 81                 }
 82             }
 83 
 84             return false;
 85         }
 86     };
 87 
 88     //创建一个Handler用于线程通讯
 89     Handler mHandler = new Handler(mCallback);
 90 
 91     //获取CPU核心数
 92     public int thisGetCPUnum(){
 93         return(Runtime.getRuntime().availableProcessors());
 94     }
 95 
 96     //列表框刷新数据
 97     public void thislist(String[] text){
 98         ListView mListView;
 99         mListView = (ListView) findViewById(R.id.listview);
100         ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,text);
101         mListView.setAdapter(adapter);
102     }
103 
104     //增加数据到数组
105     public static String[] thisArrayAdd(String[] text,String data){
106         //调用自定义函数增加数组成员
107         text = thisLengthArray(text);
108         //对新增加的数组成员赋值
109         text[text.length] = data;
110         //输出这个新数组
111         return text;
112     }
113 
114     //状态条显示文本
115     public void thistext(String text){
116         TextView textView = (TextView) findViewById(R.id.tv);
117         textView.setText(text);
118     }
119 
120     //数组增加成员数
121     public static String[] thisLengthArray(String[] text){
122         String[] newArray = new String[text.length+1];
123         System.arraycopy(text,0,newArray,0,text.length);
124         return newArray;
125     }
126 
127     class thisiflink extends Thread{
128         //新建一个固定线程的线程池，线程数量为CPU核心数量的2倍
129         ExecutorService pool = Executors.newFixedThreadPool(thisGetCPUnum()*2);
130         @Override
131         public void run(){
132             //取任务开始时的时间
133             final long start = System.currentTimeMillis();
134             //防止数据重复执行前清空已保存的数据
135             portstext = null;
136             //循环执行，一个端口占用一个线程
137             for(int i = portmin ; i <= portmax ; i++) {
138                 final int port = i;
139                 Runnable runnable = new Runnable() {
140                     @Override
141                     public void run() {
142                         boolean x = true;
143                         try {
144                             //port被5整除，则刷新UI状态条，显示当前扫描的端口
145                             if (port%5 == 0){
146                                 Message msg1 = Message.obtain();
147                                 msg1.what = 1011;
148                                 msg1.arg1 = 1;
149                                 msg1.obj = "正在扫描 " + port + " 端口，请稍候...";
150                                 mHandler.sendMessage(msg1);
151                             }
152 
153                             //socket尝试与指定IP的端口进行连接，超时300毫秒
154                             Socket mSocket;
155                             mSocket = new Socket();
156                             SocketAddress socketAddress = new InetSocketAddress(ip, port);
157                             mSocket.connect(socketAddress, 300);
158                             mSocket.close();
159 
160                             //如果成功连接则输出连接成功
161                             System.out.println("端口 " + port + " 连接成功！");
162 
163                             //防止下面代码有异常抛出将x赋值为false
164                             x = false;
165 
166                             //将数据保存到porttext中
167                             if (portstext == null || portstext.length() == 0){
168                                 portstext = "端口 " + port + " 连接成功！";
169                             }else {
170                                 portstext = portstext + "#端口 " + port + " 连接成功！";
171                             }
172 
173                             //通知刷新UI列表
174                             Message msg = Message.obtain();
175                             msg.what = 1;
176                             msg.arg1 = 1;
177                             msg.obj = "更新UI列表";
178                             mHandler.sendMessage(msg);
179                         } catch (Exception e) {
180                             if (x) {
181                                 //如果连接失败则输出连接超时
182                                 System.out.println("端口 " + port + " 连接超时...");
183                             }
184                         }
185                     }
186                 };
187                 pool.execute(runnable);//线程池循环
188             }
189             pool.shutdown();//线程池关闭
190             //等待线程结束
191             while (true){
192                 if (pool.isTerminated()){
193                     //线程结束输出保存的数据
194                     System.out.println(portstext);
195                     break;
196                 }
197             }
198             //取任务结束时的时间
199             final long end = System.currentTimeMillis();
200             //计算时间差值输出到状态条
201             thistext("线程执行完成！共耗时 " + (end-start) +" 毫秒");
202 
203             //如果porttext有数据则通知UI更新
204             if (portstext == null || portstext.length() == 0) {
205                 return;
206             }else {
207                 Message msg = Message.obtain();
208                 msg.what = 1;
209                 msg.arg1 = 1;
210                 msg.obj = "更新UI列表";
211                 mHandler.sendMessage(msg);
212 
213                 return;
214             }
215         }
216     }
217 
218     //验证是否有空编辑框
219     public boolean iftext(){
220         if (ip == null || ip.length() == 0 || portmax == 0 || portmin == 0){
221             return false;
222         }else {
223             return true;
224         }
225     }
226 }