自定义插件调用第三方lib出错

通过继承StandardFeature类自定义的插件调用第三方读取rfid的包读取rfid信息，始终无法打开设备；用原生android程序调用正常。哪位高手给指点一下？
插件代码如下：
package com.itlamp.android.plugin;

import io.dcloud.common.DHInterface.AbsMgr;
import io.dcloud.common.DHInterface.IWebview;
import io.dcloud.common.DHInterface.StandardFeature;
import io.dcloud.common.util.JSUtil;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.hardware.rfid.reader;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

public class PluginTest extends StandardFeature {

static Map<Integer,String> errorcode=new HashMap<Integer,String>();  
static{  
    errorcode.put(-20, "产品不对");  
    errorcode.put(-1, "设备无法打开");  
    errorcode.put(1, "设备已打开");  
    errorcode.put(0, "打开设备成功");  
    errorcode.put(-2, "设备参数无法设置");  
}  

private Handler mHandler = new MainHandler();  

private String m_strresult=null;  

boolean isLoop=false;  

boolean isScan=false;  

boolean msgEnd=false;//消息是否结束  

private List<String> cardList=null;  

/**  
 * 控件释放时调用此函数  
 */  
@Override  
public void dispose(String arg0) {  
    // TODO Auto-generated method stub  
    super.dispose(arg0);  
    //关闭读卡器  
    reader.Close();  
}  

/**  
 * 控件被调用之前调用此函数  
 */  
@Override  
public void init(AbsMgr arg0, String arg1) {  
    // TODO Auto-generated method stub  
    super.init(arg0, arg1);  
    int ret=reader.Open("/dev/ttyS4");  
    if(ret!=0){  
        Log.e("设备信息", "打开设备失败:"+ret);  
    }else{  
        //初始化对象  
        reader.m_handler=mHandler;  
        cardList=new ArrayList<String>();  
    }  
}  

/**  
 * 打开设备信息  
 */  
public void openDevice(IWebview pWebview, JSONArray array){  
    String CallBackID = array.optString(0);  
    JSONObject retobj=new JSONObject();       

    try {  
        int ret=reader.Open("/dev/ttyS4");  
        retobj.put("flag", ret);  

        retobj.put("msg",errorcode.get(ret));  
    } catch (Exception e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }  

    JSUtil.execCallback(pWebview, CallBackID, retobj, JSUtil.OK, false);  
}  
/**  
 * 关闭设备  
 * @param pWebview  
 * @param array  
 */  
public void closeDevice(IWebview pWebview, JSONArray array){  
    String CallBackID = array.optString(0);  
    JSONObject retobj=new JSONObject();  

    try {  
        reader.Close();  
        retobj.put("flag", 1);  
        retobj.put("msg","关闭成功");  
    } catch (JSONException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }  

    JSUtil.execCallback(pWebview, CallBackID, retobj, JSUtil.OK, false);  
}  
/**  
 * 搜索rfid卡  
 * @param pWebview  
 * @param array  
 */  
public void searchCard(IWebview pWebview, JSONArray array){  

    String CallBackID = array.optString(0);  
    m_strresult="";  
    cardList.clear();  
    msgEnd=false;  
    isLoop=false;  
    isScan=true;  
    reader.SearchLables((byte)0xff,(byte)1);  

    Map<String,String> data=getData();  
    if(data.containsKey("ERROR")){  
        JSUtil.execCallback(pWebview, CallBackID, "扫描RFID失败", JSUtil.ERROR, false);  
    }else{        
        JSONArray retobj=new JSONArray();         
        for(Map.Entry<String, String> ent:data.entrySet()){  
            retobj.put(ent.getKey());  
        }  

        JSUtil.execCallback(pWebview, CallBackID, retobj, JSUtil.OK, false);  
    }  
}  
/**  
 * 循环搜索rfid卡  
 * @param pWebview  
 * @param array  
 */  
public void loopSearchCard(IWebview pWebview, JSONArray array){  

    String CallBackID = array.optString(0);  
    m_strresult="";  
    cardList.clear();  
    msgEnd=false;  
    isLoop=true;  
    isScan=true;  
    reader.SearchLables((byte)0xff,(byte)1);  
    JSUtil.execCallback(pWebview, CallBackID, "startLoop", JSUtil.OK, false);  
}  
/**  
 * 停止循环搜索rfid卡  
 * @param pWebview  
 * @param array  
 */  
public void loopSearchEnd(IWebview pWebview, JSONArray array){  

    String CallBackID = array.optString(0);       
    isLoop=false;  

    Map<String,String> data=getData();  
    if(data.containsKey("ERROR")){  
        JSUtil.execCallback(pWebview, CallBackID, "扫描RFID失败", JSUtil.ERROR, false);  
    }else{        
        JSONArray retobj=new JSONArray();         
        for(Map.Entry<String, String> ent:data.entrySet()){  
            retobj.put(ent.getKey());  
        }  

        JSUtil.execCallback(pWebview, CallBackID, retobj, JSUtil.OK, false);  
    }  
}  
/**  
 * 选择rfid卡  
 * @param pWebview  
 * @param array [回调ID,rfid卡ID]  
 */  
public void selectCard(IWebview pWebview, JSONArray array){  
    String CallBackID = array.optString(0);  
    //卡ID  
    String cardId=array.optString(1);  

    byte[]epc=reader.stringToBytes(cardId);  
    int ret=reader.SetAccessEpcMatch((byte)0xff, (byte)0, (byte)epc.length, epc);  
    if(ret==0){  
        JSUtil.execCallback(pWebview, CallBackID, "选择成功", JSUtil.OK, false);  
    }else{  
        JSUtil.execCallback(pWebview, CallBackID, "选择失败:"+ret, JSUtil.ERROR, false);  
    }         
}  
/**  
 * 读取制定rfid的数据  
 * @param pWebview  
 * @param array [回调函数,起始地址,数据长度,卡密码,rfid]  
 */  
public void readCard(IWebview pWebview, JSONArray array){  

    String CallBackID = array.optString(0);  
    //卡ID  
    String cardId=array.optString(4);  

    byte[]epc=reader.stringToBytes(cardId);  
    int ret=reader.SetAccessEpcMatch((byte)0xff, (byte)0, (byte)epc.length, epc);  

    int nadd=array.optInt(1);//读取起始地址，默认：0;       
    int ndatalen=array.optInt(2);//读取数据的长度  
    String mimaStr = array.optString(3);//读取卡的密码  
    if (mimaStr == null || mimaStr.equals("")) {  
        JSUtil.execCallback(pWebview, CallBackID, "必须设置8位数字的读取密码", JSUtil.ERROR, false);  
        return;  
    }  
    byte[] passw = reader.stringToBytes(mimaStr);  
    byte btMemBank=3;//1-EPC 0-密码 2-TID 3-user  
    m_strresult="";  
    cardList.clear();  
    msgEnd=false;  
    isScan=false;  
    reader.ReadLables((byte)0xff, btMemBank, (byte)nadd, (byte)ndatalen, passw);  

    //获取数据  
    Map<String,String> data=getData();  
    if(data.containsKey("ERROR")){  
        JSUtil.execCallback(pWebview, CallBackID, "读数据失败", JSUtil.ERROR, false);  
    }else{  

        JSONArray retobj=new JSONArray();         
        for(Map.Entry<String, String> ent:data.entrySet()){  

            Map<String,String> item=new HashMap<String, String>();  
            item.put("rfid", ent.getKey());  
            item.put("data", ent.getValue());  
            retobj.put(item);  
        }  

        JSUtil.execCallback(pWebview, CallBackID, retobj, JSUtil.OK, false);  
    }  

}  
/**  
 * 读取范围内的所有rfid的信息  
 * @param pWebview  
 * @param array [回调函数,起始地址,数据长度,卡密码]  
 */  
public void readAllCard(IWebview pWebview, JSONArray array){  

    String CallBackID = array.optString(0);       

    int nadd=array.optInt(1);//读取起始地址，默认：0;       
    int ndatalen=array.optInt(2);//读取数据的长度  
    String mimaStr = array.optString(3);//读取卡的密码  
    if (mimaStr == null || mimaStr.equals("")) {  
        JSUtil.execCallback(pWebview, CallBackID, "必须设置8位数字的读取密码", JSUtil.ERROR, false);  
        return;  
    }  
    byte[] passw = reader.stringToBytes(mimaStr);  
    byte btMemBank=3;//1-EPC 0-密码 2-TID 3-user  
    m_strresult="";  
    cardList.clear();  
    msgEnd=false;  
    isScan=false;  
    reader.ReadLables((byte)0xff, btMemBank, (byte)nadd, (byte)ndatalen, passw);  

    //获取数据  
    Map<String,String> data=getData();  
    if(data.containsKey("ERROR")){  
        JSUtil.execCallback(pWebview, CallBackID, "读数据失败", JSUtil.ERROR, false);  
    }else{  

        JSONArray retobj=new JSONArray();         
        for(Map.Entry<String, String> ent:data.entrySet()){             

            Map<String,String> item=new HashMap<String, String>();  
            item.put("rfid", ent.getKey());  
            item.put("data", ent.getValue());  
            retobj.put(item);                     

        }  

        JSUtil.execCallback(pWebview, CallBackID, retobj, JSUtil.OK, false);  
    }  

}  
/**  
 * 写入rfid  
 * @param pWebview  
 * @param array [回调函数,起始地址,数据长度,卡密码,写入数据,rfid]  
 */  
public void writeCard(IWebview pWebview, JSONArray array){  
    String CallBackID = array.optString(0);  
    //卡ID  
    String cardId=array.optString(5);  

    byte[]epc=reader.stringToBytes(cardId);  
    int ret=reader.SetAccessEpcMatch((byte)0xff, (byte)0, (byte)epc.length,epc);  

    int nadd=array.optInt(1);//读取起始地址，默认：0;  
    int ndatalen=array.optInt(2);//数据的长度  
    String mimaStr = array.optString(3);//卡的密码  
    if (mimaStr == null || mimaStr.equals("")) {  
        JSUtil.execCallback(pWebview, CallBackID, "必须设置8位数字的读取密码", JSUtil.ERROR, false);  
        return;  
    }  
    byte[] passw = reader.stringToBytes(mimaStr);  
    byte btMemBank=3;//1-EPC 0-密码 2-TID 3-user  

    byte[] pwrite=new byte[ndatalen];    
    //String dataE = m_editInput.getText().toString().trim();  
    //获取输入字符串转成hex16进制  
    String idata=array.optString(4);//写入数据  
    String dataE=reader.encodeHex(idata);  
    byte[] myByte = reader.stringToBytes(dataE);  
    System.arraycopy(myByte, 0, pwrite, 0, myByte.length > ndatalen ? ndatalen: myByte.length);  

    m_strresult="";  
    cardList.clear();  
    //设置消息读取标识  
    msgEnd=false;  
    isScan=false;  
    reader.Writelables((byte)0xff, passw, btMemBank, (byte)nadd, (byte)ndatalen, pwrite);  

    Map<String,String> data=getData();  
    if(data.containsKey("ERROR")){  
        JSUtil.execCallback(pWebview, CallBackID, "写数据失败", JSUtil.ERROR, false);  
    }else{  

        JSONArray retobj=new JSONArray();         
        for(Map.Entry<String, String> ent:data.entrySet()){  

            Map<String,String> item=new HashMap<String, String>();  
            item.put("rfid", ent.getKey());  
            item.put("data", ent.getValue());  
            retobj.put(item);  
        }  

        JSUtil.execCallback(pWebview, CallBackID, retobj, JSUtil.OK, false);  
    }  
}  
/**  
 * 写入所有范围内的RFID卡  
 * @param pWebview  
 * @param array [回调函数,起始地址,数据长度,卡密码,写入数据]  
 */  
public void writeAllCard(IWebview pWebview, JSONArray array){  
    String CallBackID = array.optString(0);  

    int nadd=array.optInt(1);//读取起始地址，默认：0;  
    int ndatalen=array.optInt(2);//数据的长度  
    String mimaStr = array.optString(3);//卡的密码  
    if (mimaStr == null || mimaStr.equals("")) {  
        JSUtil.execCallback(pWebview, CallBackID, "必须设置8位数字的读取密码", JSUtil.ERROR, false);  
        return;  
    }  
    byte[] passw = reader.stringToBytes(mimaStr);  
    byte btMemBank=3;//1-EPC 0-密码 2-TID 3-user  

    byte[] pwrite=new byte[ndatalen];    
    //String dataE = m_editInput.getText().toString().trim();  
    //获取输入字符串转成hex16进制  
    String idata=array.optString(4);//写入数据  
    String dataE=reader.encodeHex(idata);  
    byte[] myByte = reader.stringToBytes(dataE);  
    System.arraycopy(myByte, 0, pwrite, 0, myByte.length > ndatalen ? ndatalen: myByte.length);  

    m_strresult="";  
    cardList.clear();  
    //设置消息读取标识  
    msgEnd=false;  
    isScan=false;  
    reader.Writelables((byte)0xff, passw, btMemBank, (byte)nadd, (byte)ndatalen, pwrite);  

    Map<String,String> data=getData();  
    if(data.containsKey("ERROR")){  
        JSUtil.execCallback(pWebview, CallBackID, "写数据失败", JSUtil.ERROR, false);  
    }else{  

        JSONArray retobj=new JSONArray();         
        for(Map.Entry<String, String> ent:data.entrySet()){  

            Map<String,String> item=new HashMap<String, String>();  
            item.put("rfid", ent.getKey());  
            item.put("data", ent.getValue());  
            retobj.put(item);  
        }  

        JSUtil.execCallback(pWebview, CallBackID, retobj, JSUtil.OK, false);  
    }  
}  

/**  
 * 获取消息读取结束后的数据  
 * @return  
 */  
private Map<String,String> getData(){  

    while(msgEnd==false){  
        try {  
            Thread.sleep(20);  
        } catch (InterruptedException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  
    }  

    Map<String,String> ret=new HashMap<String, String>();  

    for(String str1:cardList){  
        if(str1.indexOf("ERROR")>-1){  
            ret.put("ERROR", "ERROR");  
        }else if(str1.length()>32&&isScan==false){  
            String rdata=str1.substring(32);  
            String cardid=str1.substring(4, 28);  
            ret.put(cardid, reader.decodeHex(rdata));  
        }else{  
            ret.put(str1,str1);  
        }  
    }         

    return ret;  
}  

public void testMethod(IWebview pWebview, JSONArray array){  
    String CallBackID = array.optString(0);  
    JSONArray newArray = new JSONArray();  
    newArray.put(array.optString(1));  
    newArray.put(array.optString(2));  
    newArray.put(array.optString(3));  
    JSUtil.execCallback(pWebview, CallBackID, newArray, JSUtil.OK, false);  
}  

public void PluginTestFunctionArrayArgu(IWebview pWebview, JSONArray array)  
{  
    String ReturnString = null;  
    String CallBackID =  array.optString(0);  
    JSONArray newArray = null;  
    try {  

        newArray = new JSONArray(array.optString(1));            
        String inValue1 = newArray.getString(0);  
        String inValue2 = newArray.getString(1);  
        String inValue3 = newArray.getString(2);  
        String inValue4 = newArray.getString(3);  
        ReturnString = inValue1 + "-" + inValue2 + "-" + inValue3 + "-" + inValue4;  
    } catch (JSONException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }  

    JSUtil.execCallback(pWebview, CallBackID, ReturnString, JSUtil.OK, false);  
}  

public String testMethodSync(IWebview pWebview, JSONArray array)  
{  
    JSONArray newArray = null;  
    JSONObject retJSONObj = null;  
    try {  

        newArray = array.optJSONArray(0);  
        String inValue1 = newArray.getString(0);  
        String inValue2 = newArray.getString(1);  
        String inValue3 = newArray.getString(2);  

        retJSONObj = new JSONObject();  
        retJSONObj.putOpt("RetArgu1", inValue1);  
        retJSONObj.putOpt("RetArgu2", inValue2);  
        retJSONObj.putOpt("RetArgu3", inValue3);  

    } catch (JSONException e1) {  
        // TODO Auto-generated catch block  
        e1.printStackTrace();  
    }         

    return JSUtil.wrapJsVar(retJSONObj);  
}  

public String PluginTestFunctionSync(IWebview pWebview, JSONArray array)  
{  
    String inValue1 = array.optString(0);  
    String inValue2 = array.optString(1);  
    String inValue3 = array.optString(2);  
    String inValue4 = array.optString(3);  

    String ReturnValue = inValue1 + "-" + inValue2 + "-" + inValue3 + "-" + inValue4;  
    return JSUtil.wrapJsVar(ReturnValue,true);  
}  

/**  
 * 读取卡信息Handler类  
 * @author xql  
 *  
 */  

private class MainHandler extends Handler {  
    @Override            
    public void handleMessage(Message msg) {  
        //记录读取的数据  
        if(msg.what!=0)    
        {  
            if(m_strresult.indexOf((String)msg.obj)<0)  
            {  
                String strtmp=(String)msg.obj;  

                m_strresult+=strtmp;  
                m_strresult+="\r\n";  

                cardList.add(strtmp);  
            }  

        }  
        if(msg.what==0)    
        {  

            if(isLoop){  
                //读取rfid卡列表结束  
                if(((String)msg.obj).equals("1"))  
                {    
                    msgEnd=true;  
                }else if(((String)msg.obj).equals("endmsg")){  
                    msgEnd=true;  
                }  

                reader.SearchLables((byte)0xff,(byte)1);  
                return;    
            }else{  
                if(((String)msg.obj).equals("1"))  
                {    
                    msgEnd=true;  
                }else if(((String)msg.obj).equals("endmsg")){  
                    msgEnd=true;  
                }  
            }  

        }    
        else if(msg.what==-1)  
        {  
            if(isLoop)  
            {  
                reader.SearchLables((byte)0xff,(byte)1);  
                return;  
            }  
            cardList.add("ERROR");  
        }  
    }  
};  

}