android+json+php+mysql实现用户反馈功能

相信每个项目都会有用户反馈建议等功能，这个实现的方法很多，下面是我实现的方法，供大家交流。首先看具体界面，三个字段。名字，邮箱为选填，可以为空，建议不能为空。如有需要可以给我留言。

下面贴出布局代码，这里用到一个<include layout="@layout/uphead">就是把另外一个布局文件引入到这个布局中。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@color/bg_gray" >
    <include layout="@layout/uphead"/>
    
    <!-- Name Label -->
    <TextView android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="名字(选填)"
        android:paddingLeft="10dip"
        android:paddingRight="10dip"
        android:textColor="@color/coffee"
        android:paddingTop="10dip"
        android:textSize="12sp"/>
    
    <!-- Input Name -->
    <EditText android:id="@+id/inputName"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dip"
        android:layout_marginBottom="15dip"
        android:singleLine="true"/>
    
    <!-- Price Label -->
    <TextView android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="邮箱(选填)"
        android:paddingLeft="10dip"
        android:paddingRight="10dip"
        android:textColor="@color/coffee"
        android:paddingTop="10dip"
        android:textSize="12sp"/>
    
    <!-- Input Price -->
    <EditText android:id="@+id/inputEmail" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dip"
        android:layout_marginBottom="15dip"
        android:singleLine="true"/>
    
    <!-- Description Label -->
    <TextView android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="建议(必填)"
        android:paddingLeft="10dip"
        android:paddingRight="10dip"
        android:paddingTop="10dip"
        android:textColor="@color/coffee"
        android:textSize="12sp"/>
    
    <!-- Input description -->
    <EditText android:id="@+id/inputDesc" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dip"
        android:layout_marginBottom="15dip"
        android:lines="4"
        android:gravity="top"/>
    
    <!-- Button Create Product -->
    <Button android:id="@+id/btnCreateProduct" 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="提交"
        android:textSize="20sp"
        android:textColor="@color/coffee"
        />
    
</LinearLayout>

下面贴出uphead的布局代码，里面用到一个TextView,一个Button为返回按钮。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="50dp"
        android:background="@drawable/top" >
        <TextView
            android:id="@+id/tv_head"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:shadowColor="#ff000000"
            android:shadowDx="2"
            android:shadowDy="0"
            android:shadowRadius="1"
            android:text=""
            android:textColor="@color/white"
            android:textSize="18sp"
            android:textStyle="bold" />
        <Button
            android:id="@+id/upback"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_centerVertical="true"
            android:layout_marginLeft="17dp"
            android:drawableLeft="@id/tv_head"
            android:background="@drawable/back" />
        
    </RelativeLayout>

下面贴出android客户端代码，三个类，一个用于与服务器交互发送post请求，以及json的传递。还有一个Dailog实例。

package com.android.up;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONObject;

import com.android.MainActivity;
import com.android.R;
import com.anroid.net.DialogUtil;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class up extends Activity {

    // Progress Dialog
    private ProgressDialog pDialog;
    private TextView tv_head;
    JSONParser jsonParser = new JSONParser();
    EditText inputName;
    EditText inputEmail;
    EditText inputDesc;
    Button upback;

    // url to create new product
    private static String url_up = "http://10.0.2.2/up/up.php";
    private static final String TAG_MESSAGE = "message";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.up);
        tv_head = (TextView)findViewById(R.id.tv_head);
        tv_head.setText("建议");
        // Edit Text
        inputName = (EditText) findViewById(R.id.inputName);
        inputEmail = (EditText) findViewById(R.id.inputEmail);
        inputDesc = (EditText) findViewById(R.id.inputDesc);
        upback = (Button)findViewById(R.id.upback);
        upback.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Intent back = new Intent(up.this,MainActivity.class);
                back.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
                startActivity(back);
                up.this.finish();
            }
        });

        // Create button
        Button btnCreateProduct = (Button) findViewById(R.id.btnCreateProduct);
        // button click event
        btnCreateProduct.setOnClickListener(new View.OnClickListener() {

            public void onClick(View view) {
                // creating new product in background thread
                if(validate()){                
                new Up().execute();            
            }
                }
        });
    }
    private boolean validate()
    {
        String description = inputDesc.getText().toString().trim();
        if (description.equals(""))
        {
            DialogUtil.showDialog(this, "您还没有填写建议", false);
            return false;
        }
        
        return true;
    }
    /**
     * Background Async Task to Create new product
     * */
    class Up extends AsyncTask<String, String, String> {

        /**
         * Before starting background thread Show Progress Dialog
         * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(up.this);
            pDialog.setMessage("正在上传..");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }
        /**
         * Creating product
         * */
        protected String doInBackground(String... args) {
            String name = inputName.getText().toString();
            String email = inputEmail.getText().toString();
            String description = inputDesc.getText().toString();

            // Building Parameters
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("name", name));
            params.add(new BasicNameValuePair("email", email));
            params.add(new BasicNameValuePair("description", description));

            // getting JSON Object
            // Note that create product url accepts POST method
           try{
            JSONObject json = jsonParser.makeHttpRequest(url_up,
                    "POST", params);
            String message = json.getString(TAG_MESSAGE);
            return message;
           }catch(Exception e){
               e.printStackTrace(); 
               return "";          
           }
            // check for success tag
            
     
        }
        /**
         * After completing background task Dismiss the progress dialog
         * **/
        protected void onPostExecute(String message) {                    
            pDialog.dismiss();
           //message 为接收doInbackground的返回值
            Toast.makeText(getApplicationContext(), message, 8000).show();    
                
               
        }
        }

    }

下面贴出Dailog实例类

/**
 * 
 */
package com.anroid.net;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.view.View;
import android.app.Activity;
public class DialogUtil
{
    // 定义一个显示消息的对话框
    public static void showDialog(final Context ctx
        , String msg , boolean closeSelf)
    {
        // 创建一个AlertDialog.Builder对象
        AlertDialog.Builder builder = new AlertDialog.Builder(ctx)
            .setMessage(msg).setCancelable(false);
        if(closeSelf)
        {
            builder.setPositiveButton("确定", new OnClickListener()
            {
                public void onClick(DialogInterface dialog, int which)
                {
                    // 结束当前Activity
                    ((Activity)ctx).finish();
                }
            });        
        }
        else
        {
            builder.setPositiveButton("确定", null);
        }
        builder.create().show();
    }    
    // 定义一个显示指定组件的对话框
    public static void showDialog(Context ctx , View view)
    {
        AlertDialog.Builder builder = new AlertDialog.Builder(ctx)
            .setView(view).setCancelable(false)
            .setPositiveButton("确定", null);
        builder.create()
            .show();
    }
}

剩下就是如何与服务器端交互了不多说，代码如下

package com.android.up;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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.protocol.HTTP;
import org.json.JSONException;
import org.json.JSONObject;

import android.util.Log;

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 
    public JSONObject makeHttpRequest(String url, String method,
            List<NameValuePair> params) {

        // Making HTTP request
        try {    
                // request method is POST
                // defaultHttpClient
                DefaultHttpClient httpClient = new DefaultHttpClient();
                HttpPost httpPost = new HttpPost(url);
                httpPost.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
                HttpResponse httpResponse = httpClient.execute(httpPost);
                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, "UTF-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());
            Log.d("json", json.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;

    }
}

到此android客户端已经完成，后天服务器端用php+mysql实现，当然这里只是个实例，存取到数据库里面，没有进行展示，代码如下

<?php
// array for JSON response
$response = array();
include("conn.php");
// check for required fields
if (isset($_POST['name']) && isset($_POST['email']) && isset($_POST['description'])) {
    
    $name = $_POST['name'];
    $email = $_POST['email'];
    $description = $_POST['description'];
    $result = mysql_query("INSERT INTO up(name, email, description) VALUES('$name', '$email', '$description')");// check if row inserted or not
    if ($result) {
        // successfully inserted into database
        $response["success"] = 1;
        $response["message"] = "Product successfully created.";

        // echoing JSON response
        echo json_encode($response);
    } else {
        // failed to insert row
        $response["success"] = 0;
        $response["message"] = "Oops! An error occurred.";
        
        // echoing JSON response
        echo json_encode($response);
    }
} else {
    // required field is missing
    $response["success"] = 0;
    $response["message"] = "Required field(s) is missing";

    // echoing JSON response
    echo json_encode($response);
}
?>

数据库表结构如下，连接数据库代码就不贴出了，记得把编码设置为UTF-8就行了。

到此就完成了一个用户反馈的基本功能，后台数据里展示。如有问题欢迎给我留言。