Hello和goood day for all，任何建议如何修改androidhive显示listview中的所有产品以显示listview中的所有搜索产品。我有一个搜索学生matricID的PHP代码，显示JSON列表中的所有学生科目。
<?php
$hostname_localhost ="mysql.serverfree.com";
$database_localhost ="u658807642_andr";
$username_localhost ="u658807642_majd";
$password_localhost ="amirah";
$localhost = mysql_connect($hostname_localhost,$username_localhost,$password_localhost)
or
trigger_error(mysql_error(),E_USER_ERROR);
mysql_select_db($database_localhost, $localhost);
// array for JSON response
$response = array();
$matricID= $_REQUEST['matricID'];
// get all products from products table
//$result = mysql_query("SELECT *FROM tbl_semester") or die(mysql_error());
$order = "SELECT tbl_semester.pid, tbl_semester.matricID, tbl_semester.code, tbl_semester.course, tbl_semester.point, tbl_semester.crdhour, tbl_semester.grdpoint, tbl_semester.reattempt, tbl_semester.grd";
$order .= " FROM tbl_semester WHERE tbl_semester.matricID = '$matricID'";
$result = mysql_query($order);
if (mysql_num_rows($result) > 0) {
$response["tbl_semester"] = array();
while ($row = mysql_fetch_array($result)) {
// temp user array
$product = array();
$product["pid"] = $row["pid"];
$product["matricID"] = $row["matricID"];
$product["code"] = $row["code"];
$product["course"] = $row["course"];
$product["point"] = $row["point"];
$product["crdhour"] = $row["crdhour"];
$product["grdpoint"] = $row["grdpoint"];
$product["reattempt"] = $row["reattempt"];
$product["grd"] = $row["grd"];
// push single product into final response array
array_push($response["tbl_semester"], $product);
}
// success
$response["success"] = 1;
// echoing JSON response
echo json_encode($response);
} else {
// no products found
$response["success"] = 0;
$response["message"] = "No products found";
// echo no users JSON
echo json_encode($response);
}
exit;?>
可以在这里测试结果：
http://miramajdi.bugs3.com/android/getrecord.php?matricID=226629A131 http://miramajdi.bugs3.com/android/getrecord.php?matricID=226629A132
我成功运行了androidhive教程，但它显示了listview中数据库的所有数据，并附有PID和产品名称。
但是在我的php代码中，app需要将设置matricID发送到php，找到并将JSON列表发送回app并显示到listview中。
package i.uumportal;
import android.support.v7.app.ActionBarActivity;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.SimpleAdapter;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class SEMESTERcgpa extends ActionBarActivity {
ListView listView1;
Button button1;
Spinner spinner1;
TextView textView1;
TextView textView4;
TextView textView5;
String tUser;
String tPass;
String matricID;
//----------------------------------------------------------------------
private String array_spinner[];
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> semesterList;
// url to get all products list
private static String url_all_products = "http://miramajdi.bugs3.com/android/getrecord.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_SEMESTER = "tbl_semester";
private static final String TAG_PID = "pid";
private static final String TAG_COURSE = "course";
// products JSONArray
JSONArray tbl_semester = null;
//-------------------------------------------------------------------------
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_semestercgpa);
//Declare
button1 = (Button) findViewById(R.id.button1);
final TextView textView1=(EditText) findViewById(R.id.editText1);
final TextView textView4 = (TextView) findViewById(R.id.textView4);
final TextView textView5 = (TextView) findViewById(R.id.textView5);
Bundle b = getIntent().getExtras();
textView4.setText(b.getCharSequence("tuser"));
textView5.setText(b.getCharSequence("tpass"));
matricID=textView1.getText().toString();
//Home button function
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent intent = new Intent(getApplicationContext(), Calculator.class);
//Create a bundle object
Bundle b = new Bundle();
//Inserts a String value into the mapping of this Bundle
b.putString("tuser", textView4.getText().toString());
b.putString("tpass", textView5.getText().toString());
//Add the bundle to the intent.
intent.putExtras(b);
//start the DisplayActivity
startActivity(intent);
finish();
}});
semesterList = new ArrayList<HashMap<String, String>>();
new LoadAllProducts().execute();
}
/**
* Background Async Task to Load all product by making HTTP Request
* */
class LoadAllProducts extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(SEMESTERcgpa.this);
pDialog.setMessage("Loading products. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("matricID", matricID));
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Products: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
tbl_semester = json.getJSONArray(TAG_SEMESTER);
// looping through All Products
for (int i = 0; i < tbl_semester.length(); i++) {
JSONObject c = tbl_semester.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_PID);
String course = c.getString(TAG_COURSE);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_PID, id);
map.put(TAG_COURSE, course);
// adding HashList to ArrayList
semesterList.add(map);
}
} else {
Toast.makeText(SEMESTERcgpa.this,"No record found", Toast.LENGTH_SHORT).show();
// no products found
// Launch Add New product Activity
// Intent i = new Intent(getApplicationContext(),
// NewProductActivity.class);
// Closing all previous activities
// i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
// startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
//Dismiss the dialog after getting all products
listView1 = (ListView) findViewById(R.id.listView1);
pDialog.dismiss();
//Updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(SEMESTERcgpa.this, semesterList,R.layout.cgpalist_main, new String[] { TAG_PID,TAG_COURSE},new int[] { R.id.pid, R.id.course });
listView1.setAdapter(adapter);// setListAdapter(adapter);
}
});
}
}}
可以看到，我使用了从发送matricID之前的intent到此活动然后显示到texview4，然后将String matricID设置为text4。
matricID将与JSON get进行比较。我没有得到错误，但在模拟器中失败。需要建议或示例代码可以匹配并使用上面的PHP。