在使用中的AsyncTask得到错误的HttpClient和HTTP核心库核心、错误、AsyncTask、HTTP
2023-09-07 00:05:54
作者：暮光沉寂i
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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