Build_HttpBody()//httpPost.setEntity()-Android的问题
我用AndroidStudio开发AndroidApps我开始做一个简单的HttpPost请求,我遇到了一个问题,我能找到的所有帖子都是这样做的:Build_HttpBody()//httpPost.setEntity()-Android的问题,android,android-studio,http-post,httprequest,httpclient,Android,Android Studio,Http Post,Httprequest,Httpclient,我用AndroidStudio开发AndroidApps我开始做一个简单的HttpPost请求,我遇到了一个问题,我能找到的所有帖子都是这样做的: private void CheckLoguin_Request(String User, String Pass){ //Declaration of variables HttpClient httpClient = new DefaultHttpClient(); HttpPost Request = new Http
private void CheckLoguin_Request(String User, String Pass){
//Declaration of variables
HttpClient httpClient = new DefaultHttpClient();
HttpPost Request = new HttpPost(url_Loguin);
HttpResponse Response;
List<NameValuePair> BodyRequest_Elements = new ArrayList<NameValuePair>();
BodyRequest_Elements.add(new BasicNameValuePair("user_name", User));
BodyRequest_Elements.add(new BasicNameValuePair("user_passwd", Pass));
Request.setEntity(new UrlEncodedFormEntity(BodyRequest_Elements));
Response = httpClient.execute(Request);
// writing response to log
Log.d("Http Response:", Response.toString());
}
我可能需要安装更多库或支持库?我做了什么坏事?有人能帮我吗?提前谢谢,对不起我的英语
PD1:如果你需要更多的信息或代码,请告诉我 您显然没有处理从构造函数引发的IO异常: 见: 让我困惑的是,您的IDE并没有报告这一点,或者这段代码是如何编译的,更不用说运行/调试了 编辑: 如果你是这方面的新手,也许值得一看: ,这是一个非常简单但有效的库,由谷歌为Android网络开发 2016年更新 使用HttpURLConnection类,我们需要打开BufferedWriter以插入实体值,如下代码所示:
//Declaration of variables
private List<NameValuePair> ListOfValues;
...
public Check_Loguin_Request(Context cx,String url, List<NameValuePair> ListOfValues)
{
this.cx = cx;
this.Url = url;
this.ListOfValues= ListOfValues;
}
@Override
protected String doInBackground(String... strings) {
//Declaration of variables
InputStream is = null;
String Result = "";
URL urll = new URL(url);
HttpURLConnection conn = (HttpURLConnection) urll.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);
OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
writer.write(Build_HttpBody(ListOfValues));
writer.flush();
writer.close();
os.close();
// Starts request
conn.connect();
int ResponseCode = conn.getResponseCode();
if (ResponseCode == 200) {
is = conn.getInputStream();
String EntityResult = ReadResponse_HttpURLConnection(is);
}
else {
throw new RuntimeException("Invalid Status Code");
}
}
//变量声明
私有值列表;
...
公共检查日志请求(上下文cx、字符串url、值列表)
{
这个.cx=cx;
this.Url=Url;
ListOfValues=ListOfValues;
}
@凌驾
受保护的字符串背景(字符串…字符串){
//变量声明
InputStream=null;
字符串结果=”;
URL urll=新的URL(URL);
HttpURLConnection conn=(HttpURLConnection)urll.openConnection();
连接设置读取超时(10000);
连接设置连接超时(15000);
conn.setRequestMethod(“POST”);
conn.setDoInput(真);
连接设置输出(真);
OutputStream os=conn.getOutputStream();
BufferedWriter writer=新的BufferedWriter(新的OutputStreamWriter(os,“UTF-8”));
write(Build_HttpBody(ListOfValues));
writer.flush();
writer.close();
os.close();
//开始请求
连接();
int ResponseCode=conn.getResponseCode();
如果(响应代码==200){
is=conn.getInputStream();
字符串EntityResult=ReadResponse\u HttpURLConnection(is);
}
否则{
抛出新的运行时异常(“无效状态代码”);
}
}
注意DefaultHttpClient类已被弃用(2011年) 更多信息,请点击这里 请尝试使用以下代码,记住在这种情况下始终使用AsyncTask:
private class Check_Loguin_Request extends AsyncTask <String,Void,String>{
Context cx;
String Url;
List<NameValuePair> BodyRequest_Elements;
public Check_Loguin_Request(Context cx,String url, List<NameValuePair> ListOfValues)
{
this.cx = cx;
this.Url = url;
this.BodyRequest_Elements = ListOfValues;
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
@Override
protected String doInBackground(String... strings) {
//Declaration of variables
DefaultHttpClient httpClient;
HttpPost Request = new HttpPost(url_Loguin);
HttpResponse Response;
HttpParams httpParameters = new BasicHttpParams();
httpParameters.setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
// Set the timeout in milliseconds until a connection is established.
// The default value is zero, that means the timeout is not used.
int timeoutConnection = 3000;
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
// Set the default socket timeout (SO_TIMEOUT)
// in milliseconds which is the timeout for waiting for data.
int timeoutSocket = 5000;
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
httpClient = new DefaultHttpClient(httpParameters);
try {
HttpEntity entity = new UrlEncodedFormEntity(BodyRequest_Elements);
Request.setHeader(entity.getContentType());
Request.setEntity(entity);
Response = httpClient.execute(Request);
if(Response.getStatusLine().getStatusCode() == 200){
String EntityResult = EntityUtils.toString(Response.getEntity());
//HttpEntity EntityResult = Response.getEntity();
//InputStream iStream = EntityResult.getContent();
//JSONObject json = new JSONObject(convertStreamToString(iStream));
EntityResult = EntityResult.replaceAll("[()]", "");
JSONObject json = new JSONObject(EntityResult);
String Result = json.optString("code").toString();
return Result;
}
else{
throw new RuntimeException("Invalid Status Code");
}
}
catch (Exception ex){
Log.getStackTraceString(ex);
return ex.toString();
}
}
}
private class Check\u Loguin\u请求扩展异步任务{
语境;
字符串Url;
列出所有元素;
公共检查日志请求(上下文cx、字符串url、值列表)
{
这个.cx=cx;
this.Url=Url;
this.BodyRequest_Elements=ListOfValues;
}
私有字符串convertStreamToString(InputStream为){
BufferedReader reader=新的BufferedReader(新的InputStreamReader(is));
StringBuilder sb=新的StringBuilder();
字符串行=null;
试一试{
而((line=reader.readLine())!=null){
sb.追加(第+行“\n”);
}
}捕获(IOE异常){
e、 printStackTrace();
}最后{
试一试{
is.close();
}捕获(IOE异常){
e、 printStackTrace();
}
}
使某人返回字符串();
}
@凌驾
受保护的字符串背景(字符串…字符串){
//变量声明
默认httpClient httpClient;
HttpPost请求=新的HttpPost(url_Loguin);
HttpResponse响应;
HttpParams httpParameters=新的BasicHttpParams();
setParameters(CoreProtocolPNames.PROTOCOL_VERSION,HttpVersion.HTTP_1_1);
//以毫秒为单位设置超时,直到建立连接。
//默认值为零,表示不使用超时。
int timeoutConnection=3000;
HttpConnectionParams.setConnectionTimeout(httpParameters,timeoutConnection);
//设置默认套接字超时(SO\U超时)
//以毫秒为单位,这是等待数据的超时。
int timeoutSocket=5000;
HttpConnectionParams.setSoTimeout(httpParameters,timeoutSocket);
httpClient=新的默认httpClient(httpParameters);
试一试{
HttpEntity=新的UrlEncodedFormEntity(BodyRequest\u元素);
setHeader(entity.getContentType());
请求。设置实体(实体);
Response=httpClient.execute(请求);
if(Response.getStatusLine().getStatusCode()==200){
字符串EntityResult=EntityUtils.toString(Response.getEntity());
//HttpEntity EntityResult=Response.getEntity();
//InputStream iStream=EntityResult.getContent();
//JSONObject json=新的JSONObject(convertStreamToString(iStream));
EntityResult=EntityResult.replaceAll(“[()]”,“”);
JSONObject json=新的JSONObject(EntityResult);
字符串结果=json.optString(“代码”).toString();
返回结果;
}
否则{
抛出新的运行时异常(“无效状态代码”);
}
}
捕获(例外情况除外){
Log.getStackTraceString(ex);
返回例如toString();
}
}
}
请尝试此操作,HttpEntity entity=new UrlEncodedFormEntity(BodyRequest\u元素);setHeader(entity.getContentType());请求。设置实体(实体);显示您的基本SDK版本,虽然您的代码中没有错误,但我自己也尝试过。RegardsHow我可以向您展示我的SDK版本吗?这是我第一次使用android studio!:D问候!
private class Check_Loguin_Request extends AsyncTask <String,Void,String>{
Context cx;
String Url;
List<NameValuePair> BodyRequest_Elements;
public Check_Loguin_Request(Context cx,String url, List<NameValuePair> ListOfValues)
{
this.cx = cx;
this.Url = url;
this.BodyRequest_Elements = ListOfValues;
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
@Override
protected String doInBackground(String... strings) {
//Declaration of variables
DefaultHttpClient httpClient;
HttpPost Request = new HttpPost(url_Loguin);
HttpResponse Response;
HttpParams httpParameters = new BasicHttpParams();
httpParameters.setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
// Set the timeout in milliseconds until a connection is established.
// The default value is zero, that means the timeout is not used.
int timeoutConnection = 3000;
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
// Set the default socket timeout (SO_TIMEOUT)
// in milliseconds which is the timeout for waiting for data.
int timeoutSocket = 5000;
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
httpClient = new DefaultHttpClient(httpParameters);
try {
HttpEntity entity = new UrlEncodedFormEntity(BodyRequest_Elements);
Request.setHeader(entity.getContentType());
Request.setEntity(entity);
Response = httpClient.execute(Request);
if(Response.getStatusLine().getStatusCode() == 200){
String EntityResult = EntityUtils.toString(Response.getEntity());
//HttpEntity EntityResult = Response.getEntity();
//InputStream iStream = EntityResult.getContent();
//JSONObject json = new JSONObject(convertStreamToString(iStream));
EntityResult = EntityResult.replaceAll("[()]", "");
JSONObject json = new JSONObject(EntityResult);
String Result = json.optString("code").toString();
return Result;
}
else{
throw new RuntimeException("Invalid Status Code");
}
}
catch (Exception ex){
Log.getStackTraceString(ex);
return ex.toString();
}
}
}