package com.example.wifipassword; 
 
import java.io.BufferedReader; 
import java.io.DataInputStream; 
import java.io.DataOutputStream; 
import java.io.InputStreamReader; 
import java.util.ArrayList; 
import java.util.List; 
import java.util.regex.Matcher; 
import java.util.regex.Pattern; 
 
public class WifiManage { 
 
  public List<WifiInfo> Read() throws Exception { 
    List<WifiInfo> wifiInfos=new ArrayList<WifiInfo>(); 
   
    Process process = null; 
    DataOutputStream dataOutputStream = null; 
    DataInputStream dataInputStream = null; 
    StringBuffer wifiConf = new StringBuffer(); 
    try { 
      process = Runtime.getRuntime().exec("su"); 
      dataOutputStream = new DataOutputStream(process.getOutputStream()); 
      dataInputStream = new DataInputStream(process.getInputStream()); 
      dataOutputStream 
          .writeBytes("cat /data/misc/wifi/*.conf\n"); 
      dataOutputStream.writeBytes("exit\n"); 
      dataOutputStream.flush(); 
      InputStreamReader inputStreamReader = new InputStreamReader( 
          dataInputStream, "UTF-8"); 
      BufferedReader bufferedReader = new BufferedReader( 
          inputStreamReader); 
      String line = null; 
      while ((line = bufferedReader.readLine()) != null) { 
        wifiConf.append(line); 
      } 
      bufferedReader.close(); 
      inputStreamReader.close(); 
      process.waitFor(); 
    } catch (Exception e) { 
      throw e; 
    } finally { 
      try { 
        if (dataOutputStream != null) { 
          dataOutputStream.close(); 
        } 
        if (dataInputStream != null) { 
          dataInputStream.close(); 
        } 
        process.destroy(); 
      } catch (Exception e) { 
        throw e; 
      } 
    }   
   
     
    Pattern network = Pattern.compile("network=\\{([^\\}]+)\\}", Pattern.DOTALL); 
    Matcher networkMatcher = network.matcher(wifiConf.toString() ); 
    while (networkMatcher.find() ) { 
      String networkBlock = networkMatcher.group(); 
      Pattern ssid = Pattern.compile("ssid=\"([^\"]+)\""); 
      Matcher ssidMatcher = ssid.matcher(networkBlock); 
       
      if (ssidMatcher.find() ) {   
        WifiInfo wifiInfo=new WifiInfo(); 
        wifiInfo.Ssid=ssidMatcher.group(1); 
        Pattern psk = Pattern.compile("psk=\"([^\"]+)\""); 
        Matcher pskMatcher = psk.matcher(networkBlock); 
        if (pskMatcher.find() ) { 
          wifiInfo.Password=pskMatcher.group(1); 
        } else { 
          wifiInfo.Password="無密碼"; 
        }     
        wifiInfos.add(wifiInfo); 
      } 
       
    } 
 
    return wifiInfos; 
  } 
 
} 

package com.example.wifipassword; 
 
public class WifiInfo { 
  public String Ssid=""; 
  public String Password=""; 
} 

package com.example.wifipassword; 
 
import java.util.List; 
 
import android.app.Activity; 
import android.content.Context; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.ListView; 
import android.widget.TextView; 
 
public class MainActivity extends Activity { 
   
  private WifiManage wifiManage; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    wifiManage = new WifiManage(); 
    try { 
      Init(); 
    } catch (Exception e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
    } 
  } 
 
  public void Init() throws Exception { 
    List<WifiInfo> wifiInfos = wifiManage.Read(); 
    ListView wifiInfosView=(ListView)findViewById(R.id.WifiInfosView); 
    WifiAdapter ad = new WifiAdapter(wifiInfos,MainActivity.this); 
    wifiInfosView.setAdapter(ad);   
  } 
   
  public class WifiAdapter extends BaseAdapter{ 
 
    List<WifiInfo> wifiInfos =null; 
    Context con; 
     
    public WifiAdapter(List<WifiInfo> wifiInfos,Context con){ 
      this.wifiInfos =wifiInfos; 
      this.con = con; 
    } 
     
    @Override 
    public int getCount() { 
      // TODO Auto-generated method stub 
      return wifiInfos.size(); 
    } 
 
    @Override 
    public Object getItem(int position) { 
      // TODO Auto-generated method stub 
      return wifiInfos.get(position); 
    } 
 
    @Override 
    public long getItemId(int position) { 
      // TODO Auto-generated method stub 
      return position; 
    } 
 
    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
      // TODO Auto-generated method stub 
      convertView = LayoutInflater.from(con).inflate(android.R.layout.simple_list_item_1, null); 
      TextView tv = (TextView)convertView.findViewById(android.R.id.text1); 
      tv.setText("Wifi:"+wifiInfos.get(position).Ssid+"\n密碼:"+wifiInfos.get(position).Password); 
      return convertView; 
    } 
     
  } 
 
}