Android Open Source - WiFiSharer Scan Activity

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Back to project page WiFiSharer.

License

The source code is released under:

MIT License

Java Source Code

package com.example.wifisharer;
/*from  w w w.  j a  va2 s  . c om*/
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;

import com.example.wifisharer.MainActivity.ClientSide;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;

public class ScanActivity extends Activity{
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scan);
    final EditText start = (EditText) findViewById(R.id.etStart);
    final EditText end = (EditText) findViewById(R.id.etEnd);
    final Pattern PARTIAl_IP_ADDRESS =
                Pattern.compile("^((25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}|[1-9][0-9]|[0-9])\\.){0,3}"+
                                 "((25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}|[1-9][0-9]|[0-9])){0,1}$"); 
    start.addTextChangedListener(new TextWatcher() {                       
    @Override public void onTextChanged(CharSequence s, int start, int before, int count) {}            
    @Override public void beforeTextChanged(CharSequence s,int start,int count,int after) {}            
    private String mPreviousText = "";          
    @Override
    public void afterTextChanged(Editable s) {          
    if(PARTIAl_IP_ADDRESS.matcher(s).matches()) {
      mPreviousText = s.toString();
    } else {
      s.replace(0, s.length(), mPreviousText);
    }
          }
  });
  end.addTextChangedListener(new TextWatcher() {                       
    @Override public void onTextChanged(CharSequence s, int start, int before, int count) {}            
    @Override public void beforeTextChanged(CharSequence s,int start,int count,int after) {}            

    private String mPreviousText = "";          
    @Override
    public void afterTextChanged(Editable s) {          
      if(PARTIAl_IP_ADDRESS.matcher(s).matches()) {
      mPreviousText = s.toString();
      } else {
        s.replace(0, s.length(), mPreviousText);
      }
    }
  });
        
        Button bScan = (Button) findViewById(R.id.scan);
        bScan.setOnClickListener(new OnClickListener() {
      
           @SuppressLint("NewApi")
           @Override
           public void onClick(View v) {
             new ScanHosts().execute(start.getText().toString(),end.getText().toString());
             
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
                new ScanHosts().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,start.getText().toString(),end.getText().toString());
             else
                 new ScanHosts().execute(start.getText().toString(),end.getText().toString());
             
           }
         });
  }
  
  class ScanHosts extends AsyncTask<String, Integer, Integer>
  {
    Socket socket = null;
    DataInputStream dataInputStream = null;
    DataOutputStream dataOutputStream = null;
    String[][] alive = new String[1000][2];
    ArrayList<String> aliveHostsIp = new ArrayList<String>();
    ArrayList<String> aliveHostName = new ArrayList<String>();
    @Override
    protected Integer doInBackground(String... params) {
      Log.i("SCAN","Inside background task");
      IPAddress start = new IPAddress(params[0]);
      IPAddress end = new IPAddress(params[1]);
      int iter = 0;
      for(IPAddress i=start;i.getValue()<=end.getValue();i=i.next())
      {
        Log.i("SCAN","Testing IP:"+i.toString());
        try {
          String IP = i.toString();
          socket = new Socket();
          socket.connect(new InetSocketAddress(IP, 9999), 100);
          dataOutputStream = new DataOutputStream(socket.getOutputStream());
          dataInputStream = new DataInputStream(socket.getInputStream());
          dataOutputStream.writeInt(10);
          String response = null;
          response = dataInputStream.readUTF();
          //if(response!=null)
          {
            Log.i("SCAN",IP+" is alive, name is "+response);
            alive[iter][0]=i.toString();
            alive[iter][1]=response;
            iter++;
          }
          
        } catch (UnknownHostException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        } catch (IOException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
      }
      for(int j=0;j<iter;j++)
      {
        aliveHostsIp.add(alive[j][0]);
        aliveHostName.add(alive[j][1]);
      }
      
      return null;
    }
    @Override
    protected void onPostExecute(Integer result) {
      // TODO Auto-generated method stub
      Log.i("SCAN","Inside post execute");
      super.onPostExecute(result);
       ListView lv = (ListView) findViewById(R.id.listview);
       ArrayAdapter<String> arrayAdapterName = new ArrayAdapter<String>(
                   ScanActivity.this, 
                   R.layout.listview_layout,
                   R.id.firstLine,
                   aliveHostName );
       ArrayAdapter<String> arrayAdapterIp = new ArrayAdapter<String>(
                   ScanActivity.this, 
                   R.layout.listview_layout,
                   R.id.secondLine,
                   aliveHostsIp );
       MyListAdapter maAdapter;
       maAdapter = new MyListAdapter(ScanActivity.this, aliveHostName, aliveHostsIp);
       lv.setAdapter(maAdapter);
    }
    
  }


}

Java Source Code List

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