Voici l'exemple
MODIF : Créez d'abord un nom de base de données supposons dbname dans MySql dans wamp ou dans votre serveur et créez une table nommée emp_info dans lequel deux champs sont ajoutés id et nom
Ici, le scénario consiste à insérer l'ID et le NOM de l'employé de la base de données du serveur EDITTEXT à MYSQL
Les variables globales sont
String name;
String id;
InputStream is=null;
String result=null;
String line=null;
int code;
Pour le code d'activité
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
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.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class add extends Activity {
String name;
String id;
InputStream is=null;
String result=null;
String line=null;
int code;
String tobed = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
final EditText e_id=(EditText) findViewById(R.id.editText1);
final EditText e_name=(EditText) findViewById(R.id.editText2);
Button insert=(Button) findViewById(R.id.button1);
insert.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
id = e_id.getText().toString();
name = e_name.getText().toString();
insert();
}
});
}
}
Méthode d'insertion des données
public void insert()
{
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
// put the values of id and name in that variable
nameValuePairs.add(new BasicNameValuePair("id",id));
nameValuePairs.add(new BasicNameValuePair("name",name));
try
{
HttpClient httpclient = new DefaultHttpClient();
// here is the php file
// for local use for example if you are using wamp just put the file in www/project folder
HttpPost httppost = new HttpPost("http://10.0.2.2/project/insert2.php");
// if the file is on server
HttpPost httppost = new HttpPost("http://example.com/insert2.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
Log.e("pass 1", "connection success ");
}
catch(Exception e)
{
Log.e("Fail 1", e.toString());
Toast.makeText(getApplicationContext(), "Invalid IP Address",
Toast.LENGTH_LONG).show();
}
try
{
BufferedReader reader = new BufferedReader
(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
is.close();
result = sb.toString();
Log.e("pass 2", "connection success ");
}
catch(Exception e)
{
Log.e("Fail 2", e.toString());
}
try
{
// get the result from php file
JSONObject json_data = new JSONObject(result);
code=(json_data.getInt("code"));
if(code==1)
{
Toast.makeText(getBaseContext(), "Inserted Successfully",
Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getBaseContext(), "Sorry, Try Again",
Toast.LENGTH_LONG).show();
}
}
catch(Exception e)
{
Log.e("Fail 3", e.toString());
Log.i("tagconvertstr", "["+result+"]");
}
}
voici le fichier insert2.php
<?php
// this variables is used for connecting to database and server
$host="yourhost";
$uname="username";
$pwd='pass';
$db="dbname";
// this is for connecting
$con = mysql_connect($host,$uname,$pwd) or die("connection failed");
mysql_select_db($db,$con) or die("db selection failed");
// getting id and name from the client
if(isset($_REQUEST)){
$id=$_REQUEST['id'];
$name=$_REQUEST['name'];}
$flag['code']=0;
// query for insertion
// table name emp_info and its fields are id and name
if($r=mysql_query("insert into emp_info values('$name','$id') ",$con))
{
// if query runs succesfully then set the flag to 1 that will be send to client app
$flag['code']=1;
echo"hi";
}
// send result to client that will be 1 or 0
print(json_encode($flag));
//close
mysql_close($con);
?>
Deuxième modification :-
Pour lire les données, j'ai fait asyntask
Ici, les données sont affichées dans une liste.
public class read extends Activity {
private String jsonResult;//
// use this if your file is on server
private String url = "http://exmaple.com/read.php";
// use this if you are locally using
// private String url = "http://10.0.2.2/project/read.php";
private ListView listView;
Context context;
String name;
String id;
InputStream is=null;
String result=null;
String line=null;
int code;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.read);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
context = this;
listView = (ListView) findViewById(R.id.listView1);
accessWebService();
}
méthode accessWebService
public void accessWebService() {
JsonReadTask task = new JsonReadTask();
task.execute(new String[] { url });
}
pour la classe JsonReadTask
private class JsonReadTask extends AsyncTask<String, Void, String> {
// doInBackground Method will not interact with UI
@Override
protected String doInBackground(String... params) {
// the below code will be done in background
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(params[0]);
try {
HttpResponse response = httpclient.execute(httppost);
jsonResult = inputStreamToString(
response.getEntity().getContent()).toString();
}
catch (ClientProtocolException e) {
e.printStackTrace();
Log.e("Fail 12", e.toString());
} catch (IOException e) {
Log.e("Fail 22", e.toString());
e.printStackTrace();
}
return null;
}
private StringBuilder inputStreamToString(InputStream is) {
String rLine = "";
StringBuilder answer = new StringBuilder();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
try {
while ((rLine = rd.readLine()) != null) {
answer.append(rLine);
}
}
catch (IOException e) {
// e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error..." + e.toString(), Toast.LENGTH_LONG).show();
}
return answer;
}
// after the doInBackground Method is done the onPostExecute method will be called
@Override
protected void onPostExecute(String result) {
// here you can interact with UI
ListDrwaer();
}
}// end async task
Méthode ListDrawaer
// build hash set for list view
public void ListDrwaer() {
List<Map<String, String>> employeeList = new ArrayList<Map<String, String>>();
try {
// getting data from server
JSONObject jsonResponse = new JSONObject(jsonResult);
if(jsonResponse != null)
{
JSONArray jsonMainNode = jsonResponse.optJSONArray("emp_info");
// get total number of data in table
for (int i = 0; i < jsonMainNode.length(); i++) {
JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
String name = jsonChildNode.optString("name"); // here name is the table field
String number = jsonChildNode.optString("id"); // here id is the table field
String outPut = name + number ; // add two string to show in listview
employeeList.add(createEmployee("employees", outPut));
}
}
} catch (JSONException e) {
Toast.makeText(getApplicationContext(), "Error" + e.toString(),
Toast.LENGTH_SHORT).show();
}
SimpleAdapter simpleAdapter = new SimpleAdapter(this, employeeList,
android.R.layout.simple_list_item_1,
new String[] { "employees" }, new int[] { android.R.id.text1 });
listView.setAdapter(simpleAdapter);
}
private HashMap<String, String> createEmployee(String name, String number) {
HashMap<String, String> employeeNameNo = new HashMap<String, String>();
employeeNameNo.put(name, number);
return employeeNameNo;
}
}
et votre code de fichier read.php
<?php
$host="localhost"; //replace with database hostname
$username="root"; //replace with database username
$password=""; //replace with database password
$db_name="dbname"; //replace with database name
$con=mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
$sql = "select * from emp_info";
$result = mysql_query($sql);
$json = array();
if(mysql_num_rows($result)){
while($row=mysql_fetch_assoc($result)){
$json['emp_info'][]=$row;
}
}
mysql_close($con);
echo json_encode($json);
?>
et si vous voulez vérifier votre connexion Internet avant d'utiliser cette insertion et cette lecture, utilisez cette méthode .. c'est-à-dire mettez cette méthode dans l'instruction if else
public boolean isOnline() {
ConnectivityManager cm =
(ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting()) {
return true;
}
return false;
}
Pour la mise à jour et la suppression, utilisez la méthode d'insertion pour transmettre les valeurs au serveur et modifiez simplement la requête de insert2.php pour mettre à jour celles comme celle-ci
if($r=mysql_query("UPDATE emp_info SET employee_name = '$name' WHERE employee_name = '$id'",$con))
{
$flag['code']=1;
}
pour suppression
if($r=mysql_query("DELETE FROM emp_info WHERE employee_name = '$name'",$con))
{
$flag['code']=1;
echo"hi";
}
De plus, lorsque vous avez appris cela, la prochaine tâche que vous devriez apprendre à utiliser les threads et Asyntask pour l'améliorer, car travailler sur le thread principal n'est pas bonne sous Android. mettez simplement cette méthode d'insertion dans Asyntask comme je l'ai mentionné dans la méthode de lecture afin que l'interface utilisateur ne soit pas dérangée et que la chose Internet se fasse en arrière-plan.
REMARQUE :
pour la nouvelle version de php ajouter cette ligne après <?php extrait
error_reporting(E_ALL ^ E_DEPRECATED);
