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我遇到了android studio中parseData（）java函數的問題。我需要在一項活動中多次使用它。它首次加載時，會從URL中獲取信息並將信息顯示在列表中。這部分工作grea，但現在我需要能夠點擊每個列表並運行每個單元的parseData，每個項目都有一個我需要觸發的唯一URL，該URL告訴數據庫將該項目的數量減少一個。當我嘗試運行parseData（）函數，在文件中傳遞parseData函數並傳遞它唯一的url時，它丟失了cookie或未通過授權（登錄會話），因此應用程序失敗，並顯示以下錯誤。 URL的日誌返回302重定向，我認爲登錄會話信息丟失或沒有正確傳遞給url，它會嘗試發回登錄活動，然後導致「HttpResponse responseNew = LoginActivity.client.execute（httppost） ;」使用parsedata解析XML（）在Android會話中失去登錄
任何幫助將是偉大的。
活動代碼
package com.mike_scanncer_example.mike_scanner;
import java.io.IOException;
import java.net.URL;
import java.lang.Object;
import android.app.Activity;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import java.net.HttpURLConnection;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.kosalgeek.genasync12.AsyncResponse;
import com.kosalgeek.genasync12.PostResponseAsyncTask;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Vector;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
public class Search_Result extends Activity {
private Handler mHandler=new Handler();
ProgressDialog dialog;
String ticket_no="";
String cname="";
String order_no="";
String card_no="";
String url="";
Vector<Vector<String>> data =null;
String [] number=null;
String [] checkedin =null;
String [] type=null;
String auth="";
String msg="";
String status="";
String reply="";
String mssg="";
String c_time="";
boolean f=true;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.ticket_check);
ImageButton back = (ImageButton) findViewById(R.id.back_search);
back.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Search_Result.this.finish();
}
});
Bundle extra = getIntent().getExtras();
Log.v("bundle", String.valueOf(extra));
url=extra.getString("url");
Log.v("LOG", url);
data = new Vector<Vector<String>>();
final ListView l1 =(ListView)findViewById(R.id.ticket_list);
dialog = ProgressDialog.show(Search_Result.this,"",
"Loading...", true);
l1.setDivider(null);
final Thread t =new Thread(new Runnable() {
public void run() {
parseData();
}
});
t.start();
Thread t1 =new Thread(new Runnable() {
public void run() {
// TODO Auto-generated method stub
try {
t.join();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mHandler.post(new Runnable() {
public void run() {
dialog.cancel();
if(auth.equals("success"))
{
Log.v("login-info",auth);
number=new String[data.size()];
checkedin=new String[data.size()];
type=new String[data.size()];
for(int j=0; j<data.size(); j++)
{
number[j]=data.get(j).get(0);
checkedin[j]=data.get(j).get(1);
type[j]=data.get(j).get(2);
}
}
else
{
if(msg.equals("Please Login First"))
{
Intent intent = new Intent(Search_Result.this, LoginActivity.class);
startActivity(intent);
Toast.makeText(Search_Result.this, msg, Toast.LENGTH_SHORT).show();
}
else
{
//Toast.makeText(Search_Result.this, msg, Toast.LENGTH_SHORT).show();
AlertDialog.Builder dialog2 = new AlertDialog.Builder(Search_Result.this);
dialog2.setMessage("Sorry!\nRecord not found.");
dialog2 .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(final DialogInterface dialog, final int id)
{
finish();
}
});
dialog2.show();
}
}
l1.setAdapter(new EfficientAdapter(getApplicationContext()));
l1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0,
View arg1, int position, long id) {
}
});
}
});
}
});
t1.start();
}
private void parseData()
{
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = null;
try {
sp = spf.newSAXParser();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Get the XMLReader of the SAXParser we created.
XMLReader xr = null;
try {
xr = sp.getXMLReader();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Create a new ContentHandler and apply it to the XML-Reader
MyExampleHandlerGarbageDepot myExampleHandler = new MyExampleHandlerGarbageDepot();
xr.setContentHandler(myExampleHandler);
// Parse the xml-data from our URL.
try {
String urlToHit = url;
URL url=new URL(urlToHit);
HttpPost httppost = new HttpPost(url.toString());
HttpResponse response = LoginActivity.client.execute(httppost);
// Get hold of the response entity
HttpEntity entity = response.getEntity();
InputStream instream = null;
if (entity != null)
{
instream = entity.getContent();
}
xr.parse(new InputSource(instream));
//HttpPost http=new HttpPost(url.toString());
//HttpResponse res=client.execute(http);
// Log.v("response code",""+res);
// xr.parse(new InputSource(url.openStream()));
} catch (MalformedURLException e) {
Log.d("Net Disconnected", "NetDisconeeted");
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
Log.d("Net Disconnected", "NetDisconeeted");
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
Log.d("Net Disconnected", "NetDisconeeted");
// TODO Auto-generated catch block
e.printStackTrace();
}
}
class MyExampleHandlerGarbageDepot extends DefaultHandler
{
private Vector<String> singleItem1=null;
// private boolean Rss = false;
//private int i=0;
// ===========================================================
// Methods
// ===========================================================
@Override
public void startDocument() throws SAXException {
//this.myParsedExampleDataSet = new ParsedExampleDataSet();
}
@Override
public void endDocument() throws SAXException {
// Nothing to do
}
@Override
public void startElement(String namespaceURI, String localName,
String qName, Attributes atts) throws SAXException {
if(localName.equals("Reply"))
{
auth=atts.getValue("replyCode");
msg=atts.getValue("msg");
Log.v("@#@#@",auth);
}
else if(localName.equals("Tickets")){
}
else if(localName.equals("Ticket"))
{
singleItem1=new Vector<String>();
singleItem1.add(atts.getValue("number"));
singleItem1.add(atts.getValue("checkedin"));
singleItem1.add(atts.getValue("type"));
}
}
/** Gets be called on closing tags like:
* </tag> */
@Override
public void endElement(String namespaceURI, String localName, String qName)
throws SAXException {
if(localName.equals("Tickets"))
{
}
else if(localName.equals("Ticket"))
{
data.add(singleItem1);
}
}
/** Gets be called on the following structure:
* <tag>characters</tag> */
@Override
public void characters(char ch[], int start, int length) {
}
}
private void parseNewData(String new_url)
{
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = null;
try {
sp = spf.newSAXParser();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Get the XMLReader of the SAXParser we created.
XMLReader xr = null;
try {
xr = sp.getXMLReader();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Create a new ContentHandler and apply it to the XML-Reader
MyHandlerGarbageDepot myExampleHandler = new MyHandlerGarbageDepot();
xr.setContentHandler(myExampleHandler);
// Parse the xml-data from our URL.
try {
String urlToHit = new_url;
Log.v("test123", new_url);
URL url=new URL(urlToHit);
HttpPost httppost = new HttpPost(url.toString());
HttpResponse responseNew = LoginActivity.client.execute(httppost);
// Get hold of the response entity
HttpEntity entity = responseNew.getEntity();
InputStream instream = null;
if (entity != null)
{
instream = entity.getContent();
}
xr.parse(new InputSource(instream));
//HttpPost http=new HttpPost(url.toString());
//HttpResponse res=client.execute(http);
// Log.v("response code",""+res);
// xr.parse(new InputSource(url.openStream()));
} catch (MalformedURLException e) {
Log.d("Net Disconnected", "NetDisconeeted");
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
Log.d("Net Disconnected", "NetDisconeeted");
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
Log.d("Net Disconnected", "NetDisconeeted");
// TODO Auto-generated catch block
e.printStackTrace();
}
}
class MyHandlerGarbageDepot extends DefaultHandler
{
private boolean checkin =false;
// private boolean Rss = false;
//private int i=0;
// ===========================================================
// Methods
// ===========================================================
@Override
public void startDocument() throws SAXException {
//this.myParsedExampleDataSet = new ParsedExampleDataSet();
}
@Override
public void endDocument() throws SAXException {
// Nothing to do
}
@Override
public void startElement(String namespaceURI, String localName,
String qName, Attributes atts) throws SAXException {
if(localName.equals("Reply"))
{
reply=atts.getValue("replyCode");
mssg=atts.getValue("msg");
c_time=atts.getValue("time");
Log.v("@#@#@",auth);
}
if(localName.equals("Checkedin"))
{
checkin = true;
}
}
/** Gets be called on closing tags like:
* </tag> */
@Override
public void endElement(String namespaceURI, String localName, String qName)
throws SAXException {
if(localName.equals("Checkedin"))
{
checkin=false;
}
}
/** Gets be called on the following structure:
* <tag>characters</tag> */
@Override
public void characters(char ch[], int start, int length) {
if(checkin)
{
status = new String(ch,start,length);
}
}
}
private class EfficientAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public EfficientAdapter(Context context) {
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return data.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.ticket_list, null);
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.ticket_num);
holder.text1 = (TextView) convertView.findViewById(R.id.ticket_type);
holder.check_img = (ImageButton) convertView.findViewById(R.id.ticket_status);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.text.setText(data.get(position).get(0));
holder.text1.setText(data.get(position).get(2));
if(data.get(position).get(1).equals("0")){
holder.check_img.setBackgroundDrawable(getResources().getDrawable(R.drawable.check_inbut));
}
else{
holder.check_img.setBackgroundDrawable(getResources().getDrawable(R.drawable.checked_in_but));
}
holder.check_img.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(data.get(position).get(1).equals("0")){
//Toast.makeText(Search_Result.this,"check",Toast.LENGTH_SHORT).show();
url=Config.baseUrl+"checkin/"+Config.eventId+"/"+data.get(position).get(0);
parseNewData(url);
if(reply.equals("success"))
{
if(status.equals("0"))
{
holder.check_img.setBackgroundDrawable(getResources().getDrawable(R.drawable.check_inbut));
}
else
{
holder.check_img.setBackgroundDrawable(getResources().getDrawable(R.drawable.check_back));
Toast.makeText(Search_Result.this, "Check out", Toast.LENGTH_SHORT).show();
}
}
else
{
if(mssg.equals("Please Login First"))
{
Intent intent = new Intent(Search_Result.this, LoginActivity.class);
startActivity(intent);
Toast.makeText(Search_Result.this, mssg, Toast.LENGTH_SHORT).show();
}
}
}
else{
url=Config.baseUrl+"checkinInfo/"+Config.eventId+"/"+data.get(position).get(0);
//parseNewData(url);
Log.v("LOG", url);
AlertDialog.Builder builder = new AlertDialog.Builder(Search_Result.this);
AlertDialog.Builder builder1 = builder.setMessage("Ticket is already checked in")
.setCancelable(false)
.setPositiveButton("view details", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
String contents = data.get(position).get(0);
Intent intent = new Intent(Search_Result.this, Ticket_detail.class);
intent.putExtra("ticket_no", contents);
intent.putExtra("event_id", Config.eventId);
startActivity(intent);
}
})
.setNegativeButton("close", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
builder.show();
}
}
});
return convertView;
}
}
static class ViewHolder {
TextView text;
TextView text1;
ImageButton check_img;
}
}
輸出錯誤日誌
> E/AndroidRuntime: FATAL EXCEPTION: main
> Process: com.mike_scanncer_example.mike_scanner, PID: 2516
> android.os.NetworkOnMainThreadException
> at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1303)
> at com.android.org.conscrypt.Platform.blockGuardOnNetwork(Platform.java:300)
> at com.android.org.conscrypt.OpenSSLSocketImpl.shutdownAndFreeSslNative(OpenSSLSocketImpl.java:1194)
> at com.android.org.conscrypt.OpenSSLSocketImpl.close(OpenSSLSocketImpl.java:1189)
> at org.apache.http.impl.SocketHttpClientConnection.shutdown(SocketHttpClientConnection.java:188)
> at org.apache.http.impl.conn.DefaultClientConnection.shutdown(DefaultClientConnection.java:155)
> at org.apache.http.impl.conn.SingleClientConnManager$PoolEntry.shutdown(SingleClientConnManager.java:445)
> at org.apache.http.impl.conn.SingleClientConnManager.getConnection(SingleClientConnManager.java:249)
> at org.apache.http.impl.conn.SingleClientConnManager$1.getConnection(SingleClientConnManager.java:195)
> at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:332)
> at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:560)
> at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:492)
> at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:470)
> at com.mike_scanncer_example.mike_scanner.Search_Result.parseNewData(Search_Result.java:403)
> at com.mike_scanncer_example.mike_scanner.Search_Result.access$200(Search_Result.java:63)
> at com.mike_scanncer_example.mike_scanner.Search_Result$EfficientAdapter$1.onClick(Search_Result.java:579)
> at android.view.View.performClick(View.java:5637)
> at android.view.View$PerformClick.run(View.java:22429)
> at android.os.Handler.handleCallback(Handler.java:751)
> at android.os.Handler.dispatchMessage(Handler.java:95)
> at android.os.Looper.loop(Looper.java:154)
> at android.app.ActivityThread.main(ActivityThread.java:6119)
> at java.lang.reflect.Method.invoke(Native Method)
> at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
> at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
> Disconnected from the target VM, address: 'localhost:8648', transport:
> 'socket'
這是正確的答案。 –