我需要将值传递给textview。任何人都可以帮助我吗？ [英] i need to get the values to a textview .can anyone help me ?

问题描述

package com.example.get;



import java.util.ArrayList;

import java.util.List;

import java.util.Map;



import org.apache.http.HttpEntity;

import org.apache .http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl。 client.DefaultHttpClient;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.util.EntityUtils;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;















$ / b










import android.app.Activity;

import andro id.app.ProgressDialog;

import android.content.Context;

import android.content.Intent;

import android.content.SharedPreferences ;

导入android.content.SharedPreferences.Editor;

导入android.os.AsyncTask;

导入android.os.Bundle;

导入android.util.Log;

导入android.view.Menu;

导入android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android .widget.EditText;

导入android.widget.TextView;

导入android.widget.Toast;



公共类MainActivity扩展Activity实现OnClickListener {

私有EditText用户;

私有Button获取;

TextView txtFname;

TextView txtMname;

TextView txtLname;



JSONObject hay;

//进度对话框

私有ProgressDialog pDialog;



// JSON解析器类

JSONParser jsonParser = new JSONParser（）; < br $>




private static final String LOGIN_URL =http://www.digiassistant.comuf.com/projectphp/test.php; //更改为webhost



//从真实服务器测试：

//私有静态最终字符串LOGIN_URL =http：/ /www.yourdomain.com/webservice/login.php;



//来自php脚本repsonse的JSON元素ID：

private static final String TAG_SUCCESS =success;

private static final String TAG_MESSAGE =message;



@Override

protected void onCreate（Bundle savedInstanceState）{

// TODO自动生成的方法存根

super.onCreate（savedInstanceState）;

setContentView（R.layout.activity_main）;



//设置输入字段

user =（EditText）findViewById（R.id.user ）;

txtFname =（TextView）findViewById（R.id.fname）;

txtMname =（TextView）findViewById（R.id.lname）;

txtLname =（TextView）findViewById（R.id.mname）;





//设置按钮

get =（Button）findViewById（R.id.get）;



//注册听众

get.setOnClickListener（this）;







}







@Override

public void onClick（查看v）{

// TODO自动生成的方法存根



新的AttemptLogin（）。执行（）;



}



类AttemptLogin扩展了AsyncTask< string，> {



/ **

*开始后台主题之前显示进度对话框

* * /

boolean failure = false;



@Override

protected void onPreExecute（）{

super.onPreExecute（）;

pDialog = new ProgressDialog（MainActivity.this）;

pDialog.setMessage（尝试登录......）;

pDialog.setIndeterminate（false）;

pDialog.setCancelable（true）;

pDialog.show（）;

}





@Override

protected String doInBackground（String ... args）{

// TODO自动生成的方法存根

//检查成功标签

int success;

String username = user.getText（） .toString（）;





试试{

//构建参数

List< namevaluepair> params = new ArrayList< namevaluepair>（）;

params.add（new BasicNameValuePair（username，username））;



Log .d（request！，starting）;

//通过发出HTTP请求获取产品详细信息

JSONObject json = jsonParser.makeHttpRequest（

LOGIN_URL，POST，params）;



//检查日志中的json响应

Log.d（登录尝试，json.toString（））;



// json成功标签

success = json.getInt（TAG_SUCCESS）;

if（success == 1）{

Log.d（Login Successful！，json.toString（））;



///



//

//意图i =新意图（Login.this，Ma inActivity.class）;



//完成（）;

// startActivity（i）;

// finish（）;

返回json.getString（TAG_MESSAGE）;

} else {

Log.d（登录失败！ ，json.getString（TAG_MESSAGE））;

返回json.getString（TAG_MESSAGE）;



}

} catch（JSONException e）{

e.printStackTrace（）;

}



返回null; < br $>


}

/ **

*完成后台任务后关闭进度对话框

* ** /

protected void onPostExecute（String file_url）{

//删除产品后关闭对话框

pDialog.dismiss（ ）;

尝试{

JSONObj ect json = null;

JSONObject hay = new JSONObject（（Map）json）;

JSONArray user = hay.getJSONArray（user）;

JSONObject jb = user.getJSONObject（0）;

String firstname = jb.getString（firstname）;

String middlename = jb.getString（middlename ）;

String lastname = jb.getString（lastname）;



//在textview中显示所有数据



txtFname.setText（名字：+名字）;

txtMname.setText（中间名：+中间名）;

txtLname.setText（姓氏+姓氏）;

} catch（例外e）

{

e.printStackTrace（ ）;

}

if（file_url！= null）{

Toast.makeText（MainActivity.this，file_url，Toast.LENGTH_LONG）。 show（）;

}



}



}



}



当我运行这个时我只能获得帖子。

它不会更新txtviews

< br $>




这是我的php文件









require（'config.inc.php'）;





if（！empty（$ _ POST））{



//初始查询

$ query =选择last_name，first_name， middle_initial FROM admin其中username =：user;



$ query_params = array（'：user'=> $ _POST ['username']）;



//执行查询

try {

$ stmt = $ db - >准备（$查询）;

$ result = $ stmt - >执行（$ query_params）;

} catch（PDOException $ ex）{

$ response [success] = 0;

$ response [message] =数据库错误！;

die（json_encode（$ response））;

}



//最后，我们可以使用fetchAll将所有找到的行检索到数组中

$ rows = $ stmt - > fetchAll（）;



if（$ rows）{

$ response [success] = 1;

$ response [message] =发布可用！;

$ response [user] = array（）;



foreach（$行作为$ row）{

$ user = array（）;

// $ user [names] = $ row [names ];

$ user [middlename] = $ row [middle_initial];

$ user [firstname] = $ row [first_name];

$ user [lastname] = $ row [last_name];



//更新我们的repsonse JSON数据

array_push（$ response [user]，$ user）;

}



//回显JSON响应

echo json_encode（$ response）;



} else {

$ response [success] = 0 ;

$ response [message] =没有用户可用！;

die（json_encode（$回复））;

}



}否则{}





？>



< form action =test.phpmethod =POST>

用户名：< input type =textname =username>

< input type =submitvalue =Submit>

< ; / form>

package com.example.get;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;













import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener{
private EditText user;
private Button get;
TextView txtFname;
TextView txtMname;
TextView txtLname;

JSONObject hay;
// Progress Dialog
private ProgressDialog pDialog;

// JSON parser class
JSONParser jsonParser = new JSONParser();


private static final String LOGIN_URL = "http://www.digiassistant.comuf.com/projectphp/test.php"; // change to the webhost

//testing from a real server:
//private static final String LOGIN_URL = "http://www.yourdomain.com/webservice/login.php";

//JSON element ids from repsonse of php script:
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

//setup input fields
user = (EditText)findViewById(R.id.user);
txtFname = (TextView) findViewById(R.id.fname);
txtMname = (TextView) findViewById(R.id.lname);
txtLname = (TextView) findViewById(R.id.mname);


//setup buttons
get = (Button)findViewById(R.id.get);

//register listeners
get.setOnClickListener(this);



}



@Override
public void onClick(View v) {
// TODO Auto-generated method stub

new AttemptLogin().execute();

}

class AttemptLogin extends AsyncTask<string,> {

/**
* Before starting background thread Show Progress Dialog
* */
boolean failure = false;

@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Attempt 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;
String username = user.getText().toString();


try {
// Building Parameters
List<namevaluepair> params = new ArrayList<namevaluepair>();
params.add(new BasicNameValuePair("username", username));

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, MainActivity.class);

//finish();
//startActivity(i);
//finish();
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();
try{
JSONObject json = null;
JSONObject hay = new JSONObject ((Map) json);
JSONArray user = hay.getJSONArray("user");
JSONObject jb= user.getJSONObject(0);
String firstname = jb.getString("firstname");
String middlename = jb.getString("middlename");
String lastname = jb.getString("lastname");

// displaying all data in textview

txtFname.setText("Firstname: " + firstname);
txtMname.setText("Middle Name: " + middlename);
txtLname.setText("Last Name " + lastname);
}catch(Exception e)
{
e.printStackTrace();
}
if (file_url != null){
Toast.makeText(MainActivity.this, file_url, Toast.LENGTH_LONG).show();
}

}

}

}

when i run this i get post available only .
it doesnt update the txtviews



here is my php file




require('config.inc.php');


if (!empty($_POST)) {

//initial query
$query = "Select last_name, first_name, middle_initial FROM admin where username = :user";

$query_params = array(':user' => $_POST['username']);

//execute query
try {
$stmt = $db -> prepare($query);
$result = $stmt -> execute($query_params);
} catch (PDOException $ex) {
$response["success"] = 0;
$response["message"] = "Database Error!";
die(json_encode($response));
}

// Finally, we can retrieve all of the found rows into an array using fetchAll
$rows = $stmt -> fetchAll();

if ($rows) {
$response["success"] = 1;
$response["message"] = "Post Available!";
$response["user"] = array();

foreach($rows as $row) {
$user = array();
// $user["designation"] = $row["designation"];
$user["middlename"] = $row["middle_initial"];
$user["firstname"] = $row["first_name"];
$user["lastname"] = $row["last_name"];

//update our repsonse JSON data
array_push($response["user"], $user);
}

// echoing JSON response
echo json_encode($response);

} else {
$response["success"] = 0;
$response["message"] = "No user available!";
die(json_encode($response));
}

} else {}


?>

<form action="test.php" method="POST">
Username: <input type="text" name="username">
<input type="submit" value="Submit">
</form>

推荐答案

_POST））{



//初始查询

_POST)) {

//initial query

query =选择last_name，first_name，middle_initial FROM admin其中username =：user;

query = "Select last_name, first_name, middle_initial FROM admin where username = :user";

query_params = array（'：user'=>

query_params = array(':user' =>

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