在使用中的AsyncTask得到错误的HttpClient和HTTP核心库 [英] Getting error in AsyncTask when using Httpclient and Http core library
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问题描述
我用下面的code，但执行Asyntask，也是我已经发布我JsonParser class.Please指导我如何删除这个错误时，它提供的错误。
公共类扩展登录活动实现OnClickListener { 私人用户的EditText，通过;
私人按钮mSubmit，mRegister;
私人ProgressDialog pDialog;
// JSON解析器类
JSONParser jsonParser =新JSONParser（）;
私有静态最后弦乐LOGIN_URL =HTTP：//******/web_service/index.php
//www.itsoft-solutions.net
//从PHP脚本repsonse JSON元素ID：
私有静态最后弦乐TAG_SUCCESS =成功;
私有静态最后弦乐TAG_MESSAGE =消息;
公共静态字符串的uname;
公共静态字符串密码; @覆盖
保护无效的onCreate（捆绑savedInstanceState）{
// TODO自动生成方法存根
super.onCreate（savedInstanceState）;
的setContentView（R.layout.login）;
字符串的uname，PWD;
//设置输入字段
用户=（EditText上）findViewById（R.id.username）;
通=（EditText上）findViewById（R.id.password）;
//设置按钮
mSubmit =（按钮）findViewById（R.id.login）;
mRegister =（按钮）findViewById（R.id.register）;
//注册监听器
mSubmit.setOnClickListener（本）;
mRegister.setOnClickListener（本）; } @覆盖
公共无效的onClick（视图v）{
// TODO自动生成方法存根
开关（v.getId（））{
案例R.id.login：
新AttemptLogin（user.getText（）的toString（），pass.getText（）的toString（）。）的execute（）。
打破;
案例R.id.register：
意图I =新意图（这一点，Register.class）;
startActivity（ⅰ）;
打破; 默认：
打破;
}
}
和我也张贴了我的Asyntask类
类AttemptLogin扩展的AsyncTask＆LT;字符串，字符串，字符串＆GT; { 布尔失败= FALSE;
字符串的uname，PWD;
公共AttemptLogin（用户名字符串，字符串密码）{
的uname =用户名;
PWD =密码;
} @覆盖
在preExecute保护无效（）{
super.on preExecute（）;
pDialog =新ProgressDialog（Login.this）;
pDialog.setMessage（试图登录...）;
pDialog.setIndeterminate（假）;
pDialog.setCancelable（真）;
pDialog.show（）;
} @覆盖
保护字符串doInBackground（字符串参数... args）{
// TODO自动生成方法存根
//检查成功标记
诠释成功; 尝试{
//大厦参数
清单＆LT;＆的NameValuePair GT; PARAMS =新的ArrayList＆LT;＆的NameValuePair GT;（）;
params.add（新BasicNameValuePair（用户名，UNAME））;
params.add（新BasicNameValuePair（密码，PWD））; Log.d（！要求，出发）;
//通过HTTP请求获得产品的详细信息
JSONObject的JSON = jsonParser.makeHtt prequest（
LOGIN_URL，POST，则params）; //检查你的日志，JSON响应
Log.d（登录尝试，json.toString（））; // JSON的成功标签
成功= json.getInt（TAG_SUCCESS）;
如果（成功== 1）{
Log.d（登录成功！，json.toString（））;
意图I =新意图（Login.this，ReadComments.class）;
完（）;
startActivity（ⅰ）;
返回json.getString（TAG_MESSAGE）;
}其他{
Log.d（登录失败！，json.getString（TAG_MESSAGE））;
返回json.getString（TAG_MESSAGE）; }
}赶上（JSONException E）{
e.printStackTrace（）;
} 返回null; } / **
*在完成后台任务之后辞退进度对话框
** /
保护无效onPostExecute（字符串FILE_URL）{
//关闭该对话框一旦产品被删除
pDialog.dismiss（）;
如果（FILE_URL！= NULL）{
Toast.makeText（Login.this，FILE_URL，Toast.LENGTH_LONG）.show（）;
} } } }
以下code在JSONParser.java
包com.example.mysqltest; 公共类JSONParser { 静态InputStream为= NULL;
静态的JSONObject jObj = NULL;
静态JSON字符串=; //构造
公共JSONParser（）{ } //函数得到JSON的网址
//通过HTTP POST或GET mehtod
公众的JSONObject makeHtt prequest（URL字符串，字符串的方法，
清单＆LT;＆的NameValuePair GT; PARAMS）{ //使HTTP请求
尝试{ //检查请求的方法
如果（方法==POST）{
//请求方法是POST
// defaultHttpClient
DefaultHttpClient的HttpClient =新DefaultHttpClient（）;
HttpPost httpPost =新HttpPost（URL）;
httpPost.setEntity（新UrlEn codedFormEntity（PARAMS））; HTT presponse HTT presponse = httpClient.execute（httpPost）;
HttpEntity httpEntity = HTT presponse.getEntity（）;
是= httpEntity.getContent（）; }否则如果（方法==GET）{
//请求方法是GET
DefaultHttpClient的HttpClient =新DefaultHttpClient（）;
字符串中的paramString = URLEn codedUtils.format（参数，可以UTF-8）;
网址+ =？ +中的paramString;
HTTPGET HTTPGET =新HTTPGET（URL）; HTT presponse HTT presponse = httpClient.execute（HTTPGET）;
HttpEntity httpEntity = HTT presponse.getEntity（）;
是= httpEntity.getContent（）;
} }赶上（UnsupportedEncodingException五）{
e.printStackTrace（）;
}赶上（ClientProtocolException E）{
e.printStackTrace（）;
}赶上（IOException异常五）{
e.printStackTrace（）;
} 尝试{
读者的BufferedReader =新的BufferedReader（新的InputStreamReader（
是，ISO-8859-1），8）;
StringBuilder的SB =新的StringBuilder（）;
串线= NULL;
而（（行= reader.readLine（））！= NULL）{
sb.append（行+\\ n）;
}
is.close（）;
JSON = sb.toString（）;
}赶上（例外五）{
Log.e（缓冲区错误，错误转换结果+ e.toString（））;
} //尝试分析字符串到一个JSON对象
尝试{
jObj =新的JSONObject（JSON）;
}赶上（JSONException E）{
Log.e（JSON解析器，错误分析数据+ e.toString（））;
} //返回JSON字符串
返回jObj; }
}
我已经包括以下库我的项目。
1的HttpClient-4.5.jar
2.的HttpCore-4.4.1.jar
下面是错误堆栈。
09-01 14：22：44.365 16257-16869 / com.example.mysqltest E / AndroidRuntime：致命的异常：AsyncTask的＃3
工艺：com.example.mysqltest，PID：16257
了java.lang.RuntimeException：执行doInBackground发生错误（）
在android.os.AsyncTask $ 3.done（AsyncTask.java:300）
在java.util.concurrent.FutureTask.finishCompletion（FutureTask.java:355）
在java.util.concurrent.FutureTask.setException（FutureTask.java:222）
在java.util.concurrent.FutureTask.run（FutureTask.java:242）
在android.os.AsyncTask $ SerialExecutor $ 1.run（AsyncTask.java:231）
在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1112）
在java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:587）
在java.lang.Thread.run（Thread.java:818）
java.lang.NoSuchMethodError：由造成不虚方法execute(Lorg/apache/http/client/methods/HttpUriRequest;)Lorg/apache/http/client/methods/CloseableHtt$p$psponse;类Lorg /阿帕奇/ HTTP / IMPL /客户/ DefaultHttpClient;或它的超类（的'org.apache.http.impl.client.DefaultHttpClient声明出现在/system/framework/ext.jar）
在com.example.mysqltest.JSONParser.makeHtt prequest（JSONParser.java:52）
在com.example.mysqltest.Login $ AttemptLogin.doInBackground（Login.java:136）
在com.example.mysqltest.Login $ AttemptLogin.doInBackground（Login.java:96）
在android.os.AsyncTask $ 2.call（AsyncTask.java:288）
在java.util.concurrent.FutureTask.run（FutureTask.java:237）
在android.os.AsyncTask $ SerialExecutor $ 1.run（AsyncTask.java:231）
在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1112）
在java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:587）
在java.lang.Thread.run（Thread.java:818）
解决方案
在Android版的build.gradle节把这个code
结果 useLibrary'org.apache.http.legacy
那么你的应用程序将使用org.apache.http.legacy.jar这是Android的/ SDK /平台/ Android的23 /可选。
之所以崩溃是，谷歌移除支持的Apache HTTP客户端，并使用unstead HttpURLConnection类类建议。
下面是一个示例如何让使用HttpURLConnection类的一些网址的内容（也可以是 http://google.com？砍死= TRUE 为例）：
公共静态字符串的file_get_contents（字符串fileURL）
抛出异常{ Log.d（的file_get_contents，让网址+ fileURL）;
字符串结果=;
网址URL =新的URL（fileURL）;
HttpURLConnection的httpConn =（HttpURLConnection类）url.openConnection（）;
INT响应code = httpConn.getResponse code（）; //总是先检查HTTP响应code
如果（响应code == HttpURLConnection.HTTP_OK）{
字符串文件名=;
字符串处置= httpConn.getHeaderField（内容处置）;
字符串的contentType = httpConn.getContentType（）;
INT CONTENTLENGTH = httpConn.getContentLength（）; 如果（处置！= NULL）{
//提取物头字段文件名
INT指数= disposition.indexOf（文件名=）;
如果（指数大于0）{
文件名= disposition.substring（指数+ 10，
disposition.length（） - 1）;
}
}其他{
//提取物URL文件名
文件名= fileURL.substring（fileURL.lastIndexOf（/）+ 1，
fileURL.length（））;
} Log.d（的file_get_contents，内容类型=+的contentType）;
Log.d（的file_get_contents，内容处置=+处置）;
Log.d（的file_get_contents，内容长度=+ CONTENTLENGTH）;
Log.d（的file_get_contents，文件名=+文件名）; //从HTTP连接打开输入流
为InputStream的InputStream = httpConn.getInputStream（）; INT读取动作= -1;
字节[]缓冲区=新的字节[BUFFER_SIZE];
而（（读取动作= inputStream.read（缓冲液））！= - 1）{
Log.d（的file_get_contents，字节读：+读取动作）;
串bufferString =新串（缓冲液，0，读取动作，UTF-8）;
Log.d（的file_get_contents，缓冲器字符串：+ bufferString）;
结果= result.concat（bufferString）;
//outputStream.write(buffer，0，读取动作）;
} //outputStream.close（）;
inputStream.close（）; Log.d（的file_get_contents，文件下载）;
}其他{
Log.d（的file_get_contents，没有文件下载服务器回答HTTP code：+响应code）;
}
httpConn.disconnect（）; Log.d（的file_get_contents，返回+结果）;
返回结果;
}
I have used the following code but it gives error when executing the Asyntask and also I have posted my JsonParser class.Please guide me how can i remove this error.
public class Login extends Activity implements OnClickListener {
private EditText user, pass;
private Button mSubmit, mRegister;
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
private static final String LOGIN_URL = "http://******/web_service/index.php";
//www.itsoft-solutions.net
//JSON element ids from repsonse of php script:
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
public static String uname;
public static String password;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
String uName, pwd;
//setup input fields
user = (EditText) findViewById(R.id.username);
pass = (EditText) findViewById(R.id.password);
//setup buttons
mSubmit = (Button) findViewById(R.id.login);
mRegister = (Button) findViewById(R.id.register);
//register listeners
mSubmit.setOnClickListener(this);
mRegister.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.login:
new AttemptLogin(user.getText().toString(), pass.getText().toString()).execute();
break;
case R.id.register:
Intent i = new Intent(this, Register.class);
startActivity(i);
break;
default:
break;
}
}
and I have also posted my Asyntask class
class AttemptLogin extends AsyncTask<String, String, String> {
boolean failure = false;
String uName, pwd;
public AttemptLogin(String userName, String password) {
uName = userName;
pwd = password;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Login.this);
pDialog.setMessage("Attempting login...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// Check for success tag
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", uName));
params.add(new BasicNameValuePair("password", pwd));
Log.d("request!", "starting");
// getting product details by making HTTP request
JSONObject json = jsonParser.makeHttpRequest(
LOGIN_URL, "POST", params);
// check your log for json response
Log.d("Login attempt", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
Log.d("Login Successful!", json.toString());
Intent i = new Intent(Login.this, ReadComments.class);
finish();
startActivity(i);
return json.getString(TAG_MESSAGE);
} else {
Log.d("Login Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
**/
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (file_url != null) {
Toast.makeText(Login.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
The following code in the JSONParser.java
package com.example.mysqltest;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
I have included the following library to my project.
1. httpclient-4.5.jar
2. httpcore-4.4.1.jar
Below is the error stack.
09-01 14:22:44.365 16257-16869/com.example.mysqltest E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #3
Process: com.example.mysqltest, PID: 16257
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:300)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.NoSuchMethodError: No virtual method execute(Lorg/apache/http/client/methods/HttpUriRequest;)Lorg/apache/http/client/methods/CloseableHttpResponse; in class Lorg/apache/http/impl/client/DefaultHttpClient; or its super classes (declaration of 'org.apache.http.impl.client.DefaultHttpClient' appears in /system/framework/ext.jar)
at com.example.mysqltest.JSONParser.makeHttpRequest(JSONParser.java:52)
at com.example.mysqltest.Login$AttemptLogin.doInBackground(Login.java:136)
at com.example.mysqltest.Login$AttemptLogin.doInBackground(Login.java:96)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
解决方案
in build.gradle android section put this code
useLibrary 'org.apache.http.legacy'
Then your application will use org.apache.http.legacy.jar which is in Android/Sdk/platforms/android-23/optional. The reason for crash is that google removed support of Apache HTTP client and suggests using unstead HttpURLConnection class.
Here's a sample how to get content of some url using HttpURLConnection (it can be http://google.com?hacked=true, for example):
public static String file_get_contents(String fileURL)
throws Exception {
Log.d("file_get_contents", "getting url " + fileURL);
String result = "";
URL url = new URL(fileURL);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
int responseCode = httpConn.getResponseCode();
// always check HTTP response code first
if (responseCode == HttpURLConnection.HTTP_OK) {
String fileName = "";
String disposition = httpConn.getHeaderField("Content-Disposition");
String contentType = httpConn.getContentType();
int contentLength = httpConn.getContentLength();
if (disposition != null) {
// extracts file name from header field
int index = disposition.indexOf("filename=");
if (index > 0) {
fileName = disposition.substring(index + 10,
disposition.length() - 1);
}
} else {
// extracts file name from URL
fileName = fileURL.substring(fileURL.lastIndexOf("/") + 1,
fileURL.length());
}
Log.d("file_get_contents", "Content-Type = " + contentType);
Log.d("file_get_contents", "Content-Disposition = " + disposition);
Log.d("file_get_contents", "Content-Length = " + contentLength);
Log.d("file_get_contents", "fileName = " + fileName);
// opens input stream from the HTTP connection
InputStream inputStream = httpConn.getInputStream();
int bytesRead = -1;
byte[] buffer = new byte[BUFFER_SIZE];
while ((bytesRead = inputStream.read(buffer)) != -1) {
Log.d("file_get_contents", "bytes read: " + bytesRead);
String bufferString = new String(buffer, 0, bytesRead, "UTF-8");
Log.d("file_get_contents", "buffer string: " + bufferString);
result = result.concat(bufferString);
//outputStream.write(buffer, 0, bytesRead);
}
//outputStream.close();
inputStream.close();
Log.d("file_get_contents", "File downloaded");
} else {
Log.d("file_get_contents", "No file to download. Server replied HTTP code: " + responseCode);
}
httpConn.disconnect();
Log.d("file_get_contents", "returning " + result);
return result;
}
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