利用Android怎么样查看Wifi密码

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="无密码";         }             wifiInfos.add(wifiInfo);       }            }      return wifiInfos;   }  }