Java 我想用参数向服务器发送post请求，并在android中以JSON格式返回数据
我想向服务器发送post请求，参数包括电子邮件、api\u id、api\u密钥以及URL。 我使用asyntask执行后台操作，但在doInbackground（）方法中，当我调试它时，在doInbackground（）中显示问题Java 我想用参数向服务器发送post请求，并在android中以JSON格式返回数据,java,android,json,Java,Android,Json,我想向服务器发送post请求，参数包括电子邮件、api\u id、api\u密钥以及URL。 我使用asyntask执行后台操作，但在doInbackground（）方法中，当我调试它时，在doInbackground（）中显示问题 public class MainActivity extends ListActivity { private ProgressDialog pDialog; // URL to get contacts JSON private st
public class MainActivity extends ListActivity {
private ProgressDialog pDialog;
// URL to get contacts JSON
private static String url = "http://www.shotmakersgolf.com/server/api/user.login";
// JSON Node names
private static final String SUCCESS="success";
private static final String TOKEN="token";
private static final String TOKEN_EXPIRE="token_expire";
private static final String LOGIN="login";
private static final String LOGIN_STATUS="status";
// contacts JSONArray
JSONObject jsonObj;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Calling async task to get json
new GetContacts().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetContacts extends AsyncTask<String, Integer, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
pDialog.dismiss();
Toast.makeText(getApplicationContext(), "you are in preexceute", 3000).show();
}
@Override
protected String doInBackground(String... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.POST);
Toast.makeText(getApplicationContext(), jsonStr, Toast.LENGTH_LONG).show();
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
jsonObj = new JSONObject(jsonStr);
// looping through All Contacts
String id = jsonObj.getString(SUCCESS);
String name = jsonObj.getString(TOKEN);
String email = jsonObj.getString(TOKEN_EXPIRE);
// Phone node is JSON Object
JSONObject login = jsonObj.getJSONObject(LOGIN);
String mobile = login.getString(LOGIN_STATUS);
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put(SUCCESS, id);
contact.put(TOKEN, name);
contact.put(TOKEN_EXPIRE, email);
// adding contact to contact list
contactList.add(contact);
} catch (JSONException e) {
e.printStackTrace();
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, contactList,
R.layout.list_item, new String[] { SUCCESS, TOKEN,
TOKEN_EXPIRE }, new int[] { R.id.name,
R.id.email, R.id.mobile });
setListAdapter(adapter);
}
}
}
public class ServiceHandler {
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
public ServiceHandler() {
}
public String makeServiceCall(String url, int method) {
try {
// http client
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url.toString());
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
System.out.print("you are correct");
// Checking http request method type
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(4);
nameValuePairs.add(new BasicNameValuePair("email", "kramer@siosphere.com"));
nameValuePairs.add(new BasicNameValuePair("password", "testtest"));
nameValuePairs.add(new BasicNameValuePair("api_id", "3"));
nameValuePairs.add(new BasicNameValuePair("api_key", "06875425-b293-43af-9966-3566045f6bb95b1f7c5e-f932-4916-87f5-db0b298f2"));
// adding post params
if (nameValuePairs != null) {
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
}
httpResponse = httpClient.execute(httpPost);
httpEntity = httpResponse.getEntity();
response = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
}
public类MainActivity扩展了ListActivity{
私人对话；
//获取联系人JSON的URL
专用静态字符串url=”http://www.shotmakersgolf.com/server/api/user.login";
//JSON节点名称
私有静态最终字符串SUCCESS=“SUCCESS”；
私有静态最终字符串TOKEN=“TOKEN”；
私有静态最终字符串TOKEN\u EXPIRE=“TOKEN\u EXPIRE”；
私有静态最终字符串LOGIN=“LOGIN”；
私有静态最终字符串登录\u STATUS=“STATUS”；
//联系JSONArray
JSONObject jsonObj；
//ListView的Hashmap
ArrayList联系人列表；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
contactList=新的ArrayList（）；
ListView lv=getListView（）；
//调用异步任务以获取json
新建GetContacts（）.execute（）；
}
/**
*异步任务类通过HTTP调用获取json
* */
私有类GetContacts扩展异步任务{
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
//显示进度对话框
pDialog=新建进度对话框（MainActivity.this）；
setMessage（“请稍候…”）；
pDialog.setCancelable（假）；
pDialog.show（）；
pDialog.disclose（）；
Toast.makeText（getApplicationContext（），“您在PreExcute”，3000.show（）；
}
@凌驾
受保护的字符串doInBackground（字符串…arg0）{
//创建服务处理程序类实例
ServiceHandler sh=新的ServiceHandler（）；
//向url发出请求并获得响应
字符串jsonStr=sh.makeServiceCall（url，ServiceHandler.POST）；
Toast.makeText（getApplicationContext（），jsonStr，Toast.LENGTH_LONG）.show（）；
Log.d（“响应：”、“>”+jsonStr）；
if（jsonStr！=null）{
试一试{
jsonObj=新的JSONObject（jsonStr）；
//通过所有触点循环
String id=jsonObj.getString（成功）；
String name=jsonObj.getString（令牌）；
String email=jsonObj.getString（TOKEN_EXPIRE）；
//电话节点是JSON对象
jsonobjectlogin=jsonObj.getJSONObject（login）；
String mobile=login.getString（登录状态）；
//单触点的tmp哈希映射
HashMap contact=新的HashMap（）；
//将每个子节点添加到HashMap key=>value
contact.put（成功，id）；
联系人。put（令牌、名称）；
联系人。放置（令牌过期，电子邮件）；
//将联系人添加到联系人列表
联系人列表。添加（联系人）；
}捕获（JSONException e）{
e、 printStackTrace（）；
Log.e（“ServiceHandler”，“无法从url获取任何数据”）；
}
}否则{
Log.e（“ServiceHandler”，“无法从url获取任何数据”）；
}
返回null；
}
@凌驾
受保护的void onPostExecute（字符串结果）{
super.onPostExecute（结果）；
//关闭进度对话框
if（pDialog.isShowing（））
pDialog.disclose（）；
/**
*将解析的JSON数据更新到ListView中
* */
ListAdapter=新的SimpleAdapter(
MainActivity.this，联系人列表，
R.layout.list_项，新字符串[]{SUCCESS，TOKEN，
令牌_EXPIRE}，新int[]{R.id.name，
R.id.email，R.id.mobile}）；
setListAdapter（适配器）；
}
}
}
public class MainActivity extends ListActivity {
private ProgressDialog pDialog;
// URL to get contacts JSON
private static String url = "http://www.shotmakersgolf.com/server/api/user.login";
// JSON Node names
private static final String SUCCESS="success";
private static final String TOKEN="token";
private static final String TOKEN_EXPIRE="token_expire";
private static final String LOGIN="login";
private static final String LOGIN_STATUS="status";
// contacts JSONArray
JSONObject jsonObj;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Calling async task to get json
new GetContacts().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetContacts extends AsyncTask<String, Integer, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
pDialog.dismiss();
Toast.makeText(getApplicationContext(), "you are in preexceute", 3000).show();
}
@Override
protected String doInBackground(String... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.POST);
Toast.makeText(getApplicationContext(), jsonStr, Toast.LENGTH_LONG).show();
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
jsonObj = new JSONObject(jsonStr);
// looping through All Contacts
String id = jsonObj.getString(SUCCESS);
String name = jsonObj.getString(TOKEN);
String email = jsonObj.getString(TOKEN_EXPIRE);
// Phone node is JSON Object
JSONObject login = jsonObj.getJSONObject(LOGIN);
String mobile = login.getString(LOGIN_STATUS);
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put(SUCCESS, id);
contact.put(TOKEN, name);
contact.put(TOKEN_EXPIRE, email);
// adding contact to contact list
contactList.add(contact);
} catch (JSONException e) {
e.printStackTrace();
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, contactList,
R.layout.list_item, new String[] { SUCCESS, TOKEN,
TOKEN_EXPIRE }, new int[] { R.id.name,
R.id.email, R.id.mobile });
setListAdapter(adapter);
}
}
}
public class ServiceHandler {
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
public ServiceHandler() {
}
public String makeServiceCall(String url, int method) {
try {
// http client
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url.toString());
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
System.out.print("you are correct");
// Checking http request method type
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(4);
nameValuePairs.add(new BasicNameValuePair("email", "kramer@siosphere.com"));
nameValuePairs.add(new BasicNameValuePair("password", "testtest"));
nameValuePairs.add(new BasicNameValuePair("api_id", "3"));
nameValuePairs.add(new BasicNameValuePair("api_key", "06875425-b293-43af-9966-3566045f6bb95b1f7c5e-f932-4916-87f5-db0b298f2"));
// adding post params
if (nameValuePairs != null) {
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
}
httpResponse = httpClient.execute(httpPost);
httpEntity = httpResponse.getEntity();
response = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
}
公共类ServiceHandler{
静态字符串响应=null；
公共最终静态int GET=1；
公共最终静态int POST=2；
公共服务处理程序（）{
}
公共字符串makeServiceCall（字符串url，int方法）{
试一试{
//http客户端
HttpClient HttpClient=新的DefaultHttpClient（）；
HttpPost-HttpPost=newhttppost（url.toString（））；
HttpEntity HttpEntity=null；
HttpResponse HttpResponse=null；
系统输出打印（“您是正确的”）；
//检查http请求方法类型
List nameValuePairs=新的ArrayList（4）；
添加（新的BasicNameValuePair（“电子邮件”）kramer@siosphere.com"));
添加（新的BasicNameValuePair（“密码”、“测试”）；
添加（新的BasicNameValuePair（“api_id”，“3”））；
名称值对。添加（新的基本名称值对（“api_键”，“06875425-b293-43af-9966-3566045f6bb95b1f7c5e-f932-4916-87f5-db0b298f2”）；
//添加post参数
if（nameValuePairs！=null）{
setEntity（新的UrlEncodedFormEntity（nameValuePairs））；
}
httpResponse=httpClient.execute（httpPost）；
httpEntity=httpResponse.getEntity（）；
response=EntityUtils.toString（httpEntity）；
}捕获（不支持的编码异常e）{
e、 printStackTrace（）；
}捕获（客户端协议例外e）{
e、 printStackTrace（）；
}捕获（IOE异常）{
e、 printStackTrace（）；
}