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在Android中使用php以Json格式獲取數據庫信息

[英]Fetch database information in Json format data using php in Android

 原文  2016-08-01 05:18:33  6   1    php/ android/ json/ listview

問題描述

我在運行php文件時獲取json數據，但無法在android頁面上獲取它。 我也檢查了連接 

 //checking the connection with server-.php file
                    int i =response.getStatusLine().getStatusCode();

                    System.out.println(i); // Checking the connection,If connected i=200

並且連接正確。 i = 200。

沒有顯示任何錯誤，但仍然無法在android上獲取數據。

PHP文件：-SampleConLogin1.php 

<?php
$con=mysqli_connect("localhost","amodbina0106","Amodbina200","kezin_king");
if ($con->connect_error) {
    die("Connection failed: " . $con->connect_error);
} 
echo "Connected successfully";
?>

<?php
$sql=mysqli_query($con,"SELECT * FROM `Test` WHERE 1");
$result=array();
while($row=mysqli_fetch_assoc($sql))
{
$vendorid=$row['Vendor_ID'];
$username=$row['username'];
$password=$row['password'];
?>

 <?php 
$a = array($vendorid,$username,$password);
array_push($result,$a);



}
echo json_encode(array("result"=>$result));
?>

.php文件的輸出：-運行.php文件后生成的輸出 

Connected successfully {"result":[["1","nupur","nupur"],["4","",""],["3","nupur","1234"],["5","RAJ","RAJ"],["6","RAJ","RAJ"],["7","",""],["8","",""],["9","",""],["10","",""],["11","",""],["12","RAM","RAM"],["13","RAM","RAM"],["14","RAM","RAM"],["15","RAM","RAM"],["16","Nupur","Nupur"],["17","Nupur","Nupur"],["18","Nupur","Nupur"],["19","Nupur","Nupur"],["20","Rohit","Rohit"],["21","RAM","RAM"],["22","",""],["23","",""],["24","RAM","RAM"],["35","SAGAR","SAGAR"],["34","SAGAR","SAGAR"],["33","SAGAR","SAGAR"],["32","RAM","RAM"],["31","",""],["36","SAGAR","SAGAR"],["37","SAGAR","SAGAR"],["38","SAGAR","SAGAR"],["39","SAGAR","SAGAR"],["40","SAGAR","SAGAR"],["41","SAGAR","SAGAR"],["73","",""],["43","SAGAR","SAGAR"],["44","SAGAR","SAGAR"],["45","SAGAR","SAGAR"],["46","SAGAR","SAGAR"],["47","username","password"],["74","SAGAR","SAGAR"],["75","SAGAR","SAGAR"],["72","Krishna","Krishna"],["68","Honey","Honey"],["69","Ram","Ram"],["70","Ram","Ram"],["71","Ram","Ram"]]}

傑森數據：-使用json編輯器后，我得到了json格式的結果。因為我從php文件中獲取了json數據 

-object     {1}

  -result       [47]

       -0       [3]

            0   :   1

            1   :   nupur

            2   :   nupur

      -1        [3]

           0    :   4

           1    :   

           2    :   

     -2       [3]

           0    :   3

           1    :   nupur

           2    :   1234

     -3       [3]

           0    :   5

           1    :   RAJ

           2    :   RAJ

    -4       [3]

         0  :   6

        1   :   RAJ

        2   :   RAJ

5       [3]

  ............................

安卓-MainActivity.Java 

package com.example.nupur.fetchjson;

import android.os.AsyncTask;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;

public class MainActivity extends ActionBarActivity {
String myJson;
    private static final String TAG_RESULTS="result";
    private static final String TAG_VENDOR_ID="id";
    private static final String TAG_USERNAME="username";
    private static final String TAG_PASSWORD="password";
    JSONArray peoples =null;
    ArrayList<HashMap<String, String>> personList;
    ListView list;
   // TextView check;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        list=(ListView) findViewById(R.id.listView);
        //check=(TextView) findViewById(R.id.check);
        personList = new ArrayList<HashMap<String,String>>();
        getData();
    }
    protected void showList(){
        try{
            JSONObject jsonObj = new JSONObject(myJson);
            peoples = jsonObj.getJSONArray(TAG_RESULTS);
          //  check.setText(myJson);

            for(int i=0;i<peoples.length();i++){
                JSONObject c = peoples.getJSONObject(i);
                String VENDOR_ID = c.getString(TAG_VENDOR_ID);
                String username = c.getString(TAG_USERNAME);
                String password = c.getString(TAG_PASSWORD);

                HashMap<String,String> persons = new HashMap<String,String>();

                persons.put(TAG_VENDOR_ID,VENDOR_ID);
                persons.put(TAG_USERNAME,username);
                persons.put(TAG_PASSWORD,password);

                personList.add(persons);
            }

            ListAdapter adapter = new SimpleAdapter(
                    MainActivity.this, personList, R.layout.list_view,
                    new String[]{TAG_VENDOR_ID,TAG_USERNAME,TAG_PASSWORD},
                    new int[]{R.id.Vendor_id, R.id.username, R.id.password}
            );

            list.setAdapter(adapter);

        }catch (JSONException e) {
            e.printStackTrace();
        }
    }
    public void getData(){
        class getDATAJSON extends AsyncTask<String,Void,String>{
            @Override
            protected String doInBackground(String... params) {
                DefaultHttpClient httpclient = new DefaultHttpClient(new BasicHttpParams());
                HttpPost httppost = new HttpPost("http://kezinking.com/SampleConLogin1");
                // Depends on your web service
                httppost.setHeader("Content-type", "application/json");
                InputStream inputStream = null;
                String result = null;
                try{
                    HttpResponse response = httpclient.execute(httppost);
                    HttpEntity entity = response.getEntity();

                    inputStream = entity.getContent();
                    // json is UTF-8 by default
                    BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"), 8);
                    StringBuilder sb = new StringBuilder();
                    String line = null;
                    while ((line = reader.readLine()) != null)
                    {
                        sb.append(line + "\n");
                    }
                    result = sb.toString();
                    //checking the connection with server-.php file
                    int i =response.getStatusLine().getStatusCode();

                    System.out.println(i); // Checking the connection,If connected i=200

                }catch (Exception e) {
                    // Oops
                }finally {
                    try{if(inputStream != null)inputStream.close();}catch(Exception squish){}
                }
                return result;
            }

            @Override
            protected void onPostExecute(String result) {
                myJson=result;
                showList();
            }
        }
        getDATAJSON g = new getDATAJSON();
        g.execute();
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Android- activity_main.xml 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">


    <ListView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/listView" />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/check"/>
</LinearLayout>

安卓-list_view.xml 

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="10dp"
        android:paddingLeft="10dp"
        android:paddingRight="10dp" >


        <TextView
            android:id="@+id/Vendor_id"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:paddingBottom="2dip"
            android:paddingTop="6dip"
            android:textStyle="bold" />


        <TextView
            android:id="@+id/username"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:paddingBottom="2dip"
            android:textStyle="bold"/>


        <TextView
            android:id="@+id/password"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="left"
            android:textStyle="bold" />

    </LinearLayout>

Android:- **AndroidManifest.xml**

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.nupur.fetchjson">
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

1 個解決方案

解決方案1
 0  2016-08-01 05:55:59

如我所見，您正在嘗試從php腳本獲取的json響應中基於密鑰獲取數據。 在show data函數內部，您可以這樣編寫以解析結果json Array中的數據。 

 JSONObject c = peoples.getJSONObject(i);
            String VENDOR_ID = c.getString(TAG_VENDOR_ID);
            String username = c.getString(TAG_USERNAME);
            String password = c.getString(TAG_PASSWORD);

但是您從您的php腳本獲得的結果是沒有聯系對象數組，它包含數組數組。 因此，您的php文件應提供類似json的響應。 

{"result":[{"Vendor_ID":"1","username":"nupur","password":"nupur"},{"Vendor_ID":"2","username":"abc","password":"xyz"}]}

為了生成上述json響應，您需要像這樣更改您的php腳本。 

    $con=mysqli_connect("localhost","amodbina0106","Amodbina200","kezin_king");
if ($con->connect_error) {
    die("Connection failed: " . $con->connect_error);
} 
echo "Connected successfully";
?>

<?php
$sql=mysqli_query($con,"SELECT * FROM `Test` WHERE 1");
$result=array();
while($row=mysqli_fetch_assoc($sql))
{
    $result[]=$row;
}
echo json_encode(array("result"=>$result));
?>

您的MainActvity中的另一項更改更改了此行 

private static final String TAG_VENDOR_ID="id";

對此 

private static final String TAG_VENDOR_ID="Vendor_ID";

因為您將在json響應而不是id中獲得Vendor_ID。

我希望這能幫到您。 如果您發現任何問題，請隨時詢問。

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