Bonsoir,
Je suis entrain de développer un petit exemple sur l'ajout d'une nouvelle ligne employé dans la base de données pour cela j'ai fait ceci :
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| package com.gestionemploye.ahmed.gestionemploye;
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.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
/**
* Created by Ahmed on 04/12/2014.
*/
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 or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if (method == "POST") {
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} else if (method == "GET") {
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
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, "iso-8859-1"), 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());
}
// 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;
}
public static JSONObject getjObj() {
return jObj;
}
public static void setjObj(JSONObject jObj) {
JSONParser.jObj = jObj;
}
} |
et ma classe est :
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| package com.gestionemploye.ahmed.gestionemploye;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View.OnClickListener;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
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.Button;
import android.widget.EditText;
import android.widget.Toast;
/**
* Created by Ahmed on 04/12/2014.
*/
public class AddNewEmploye extends Activity implements OnClickListener{
// Progress Dialog
private ProgressDialog pDialog;
JSONParser jsonParser = new JSONParser();
private EditText txtnewidiom;
private EditText txtmeaning;
private Button btnsavenew;
private int success;
//to determine JSON signal insert success/fail
// url to insert new idiom (change accordingly)
private static String url_insert_new = "http://192.168.1.7/androidexemple/insertnew.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.ajoutemploye);
// Edit Text
txtnewidiom = (EditText) findViewById(R.id.textnewidiom);
txtmeaning = (EditText) findViewById(R.id.txtmeaning);
// Save button
btnsavenew = (Button) findViewById(R.id.btnsavenew);
// button click event
btnsavenew.setOnClickListener(this);
}
@Override public void onClick(View v) {
if (v.getId()==R.id.btnsavenew){
//call the InsertNewIdiom thread
new InsertNewIdiom().execute();
if (success==1){
Toast.makeText(getApplicationContext(), "New idiom saved...", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(getApplicationContext(), "New idiom FAILED to saved...", Toast.LENGTH_LONG).show();
}
}
}
/** * Background Async Task to Create new Idioms * */
class InsertNewIdiom extends AsyncTask<String, String, String> {
//capture values from EditText
String entry = txtnewidiom.getText().toString();
String meaning = txtmeaning.getText().toString();
/** * Before starting background thread Show Progress Dialog * */
@Override protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AddNewEmploye.this);
pDialog.setMessage("Saving the new IDIOM ("+entry+")...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/** * Inserting the new idiom * */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("entry", entry));
params.add(new BasicNameValuePair("meaning", meaning));
// getting JSON Object // Note that create product url accepts GET method
JSONObject json = jsonParser.makeHttpRequest(url_insert_new, "GET", params);
// check log cat from response
Log.d("Insert New Idiom Response", json.toString());
// check for success tag
try {
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully save new idiom
} else {
// failed to add new idiom
}
} catch (JSONException e)
{
e.printStackTrace();
}
//return null;
return null; }
/** * After completing background task Dismiss the progress dialog * **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
}
}
} |
et j'ai activé la permission android.permission.INTERNET
En exécutant le code j'obtiens l 'erreur suivante :
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| 691-705/com.gestionemploye.ahmed.gestionemploye E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #1
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:278)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
Caused by: java.lang.NullPointerException
at com.gestionemploye.ahmed.gestionemploye.AddNewEmploye$InsertNewIdiom.doInBackground(AddNewEmploye.java:105)
at com.gestionemploye.ahmed.gestionemploye.AddNewEmploye$InsertNewIdiom.doInBackground(AddNewEmploye.java:77)
at android.os.AsyncTask$2.call(AsyncTask.java:264)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) |
la ligne 105 dans l'erreur pointe sur cette ligne
JSONObject json = jsonParser.makeHttpRequest(url_insert_new, "GET", params);
et la ligne 77 :
class InsertNewIdiom extends AsyncTask<String, String, String> {
Merci pour votre aide !
Problème JSONParser
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