ANDROID Updating a ListView via JSON with AsyncTask MySQL-Collection of common programming errors

10 years ago
admin
14 minutes

  • jbihan

    Immersed in the development of my program, I encounter an error that seems to me not really speaking.

    So here’s my logcat in the order and the java code:

    When I click on the item in my listview it should return me the contact information for the update.

    public class  MajContactActivity extends Activity {

EditText txtNom;
EditText txtPrenom;
EditText txtNummobile;
EditText txtNumfixe;
EditText txtEmail;
EditText txtAdresse;
EditText txtProfession;

Button btnSav;
Button btnSup;

String idCONTACT;

// Progress Dialog
private ProgressDialog pDialog;

// JSON parser class
JSONParser jsonParser = new JSONParser();

// single contact url
private static final String url_detail_contact = "http://10.0.2.2/contactCloud/detail_contact.php";

// url to update contact
private static final String url_update_contact = "http://10.0.2.2/contactCloud/update_contact.php";

// url to delete contact
private static final String url_delete_contact = "http://10.0.2.2/contactCloud/delete_contact.php";

// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_CONTACT = "personne";
private static final String TAG_IDCONTACT = "idCONTACT";

private static final String TAG_NOM = "nom";
private static final String TAG_PRENOM = "prenom";
private static final String TAG_NUMMOBILE = "numero_mobile";
private static final String TAG_NUMFIXE = "numero_fixe";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADRESSE = "adresse";
private static final String TAG_PROFESSION = "profession";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.maj_contact);

    // save button
    btnSav = (Button) findViewById(R.id.btnSav);
    btnSup = (Button) findViewById(R.id.btnSup);

    // getting contact details from intent
    Intent i = getIntent();

    // getting contact id (idCONTACT) from intent
    idCONTACT = i.getStringExtra(TAG_IDCONTACT);

    // Getting complete contact details in background thread
    new GetDetailContact().execute();

    // save button click event
    btnSav.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // starting background task to update contact
            new SavDetailContact().execute();
        }
    });

    // Delete button click event
    btnSup.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // deleting contact in background thread
            new SupContact().execute();
        }
    });

}

/**
 * Background Async Task to Get complete contact details
 * */
class GetDetailContact extends AsyncTask {

    /**
     * Before starting background thread Show Progress Dialog
     * */
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(MajContactActivity.this);
        pDialog.setMessage("Chargement du contact. Veuillez patientez...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(true);
        pDialog.show();
    }

    /**
     * Getting contact details in background thread
     * */
    protected String doInBackground(String... params) {

                // Check for success tag
                int success;
                try {
                    // Building Parameters
                    List params1 = new ArrayList();
                    params1.add(new BasicNameValuePair("idCONTACT", idCONTACT));

                    // getting contact details by making HTTP request
                    // Note that contact details url will use GET request
                    JSONObject json = jsonParser.makeHttpRequest(url_detail_contact, "GET", params1);

                    // check your log for json response
                    Log.d("Detail contact unique", json.toString());

                    // json success tag
                    success = json.getInt(TAG_SUCCESS);
                    if (success == 1) {
                        // successfully received contact details
                        JSONArray personneObj = json.getJSONArray(TAG_CONTACT); // JSON Array

                        // get first contact object from JSON Array
                        JSONObject personne = personneObj.getJSONObject(0);

                        // contact with this idCONTACT found
                        // Edit Text
                        txtNom = (EditText) findViewById(R.id.inputNom);
                        txtPrenom = (EditText) findViewById(R.id.inputPrenom);
                        txtNummobile = (EditText) findViewById(R.id.inputNumMobile);
                        txtNumfixe = (EditText) findViewById(R.id.inputNumFixe);
                        txtEmail = (EditText) findViewById(R.id.inputEmail);
                        txtAdresse = (EditText) findViewById(R.id.inputAdresse);
                        txtProfession = (EditText) findViewById(R.id.inputProfession);

                        // display contact data in EditText
                        txtNom.setText(personne.getString(TAG_NOM));
                        txtPrenom.setText(personne.getString(TAG_PRENOM));
                        txtNummobile.setText(personne.getString(TAG_NUMMOBILE));
                        txtNumfixe.setText(personne.getString(TAG_NUMFIXE));
                        txtEmail.setText(personne.getString(TAG_EMAIL));
                        txtAdresse.setText(personne.getString(TAG_ADRESSE));
                        txtProfession.setText(personne.getString(TAG_PROFESSION));

                    }else{
                        // contact with idCONTACT not found
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
        return null;
    }
    /**
     * After completing background task Dismiss the progress dialog
     * **/
    protected void onPostExecute(String file_url) {
        // dismiss the dialog once got all details
        pDialog.dismiss();
    }
}

/**
 * Background Async Task to  Save contact Details
 * */
class SavDetailContact extends AsyncTask {

    /**
     * Before starting background thread Show Progress Dialog
     * */
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(MajContactActivity.this);
        pDialog.setMessage("Sauvegarde du contact ...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(true);
        pDialog.show();
    }

    /**
     * Saving contact
     * */
    protected String doInBackground(String... args) {

        // getting updated data from EditTexts
        String nom = txtNom.getText().toString();
        String prenom = txtPrenom.getText().toString();
        String numero_mobile = txtNummobile.getText().toString();
        String numero_fixe = txtNumfixe.getText().toString();
        String email = txtEmail.getText().toString();
        String adresse = txtAdresse.getText().toString();
        String profession = txtProfession.getText().toString();

        // Building Parameters
        List params = new ArrayList();

        params.add(new BasicNameValuePair(TAG_IDCONTACT, idCONTACT));
        params.add(new BasicNameValuePair(TAG_NOM, nom));
        params.add(new BasicNameValuePair(TAG_PRENOM, prenom));
        params.add(new BasicNameValuePair(TAG_NUMMOBILE, numero_mobile));
        params.add(new BasicNameValuePair(TAG_NUMFIXE, numero_fixe));
        params.add(new BasicNameValuePair(TAG_EMAIL, email));
        params.add(new BasicNameValuePair(TAG_ADRESSE, adresse));
        params.add(new BasicNameValuePair(TAG_PROFESSION, profession));

        // sending modified data through http request
        // Notice that update contact url accepts POST method
        JSONObject json = jsonParser.makeHttpRequest(url_update_contact,"POST", params);

        // check json success tag
        try {
            int success = json.getInt(TAG_SUCCESS);

            if (success == 1) {
                // successfully updated
                Intent i = getIntent();
                // send result code 100 to notify about contact update
                setResult(100, i);
                finish();
            } else {
                // failed to update contact
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }

        return null;
    }

    /**
     * After completing background task Dismiss the progress dialog
     * **/
    protected void onPostExecute(String file_url) {
        // dismiss the dialog once contact uupdated
        pDialog.dismiss();
    }
}

/*****************************************************************
 * Background Async Task to Delete Product
 * */
class SupContact extends AsyncTask {

    /**
     * Before starting background thread Show Progress Dialog
     * */
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(MajContactActivity.this);
        pDialog.setMessage("Suppression du contact...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(true);
        pDialog.show();
    }

    /**
     * Deleting contact
     * */
    protected String doInBackground(String... args) {

        // Check for success tag
        int success;
        try {
            // Building Parameters
            List params = new ArrayList();
            params.add(new BasicNameValuePair("idCONTACT", idCONTACT));

            // getting contact details by making HTTP request
            JSONObject json = jsonParser.makeHttpRequest(url_delete_contact, "POST", params);

            // check your log for json response
            Log.d("Suppression du contact", json.toString());

            // json success tag
            success = json.getInt(TAG_SUCCESS);
            if (success == 1) {
                // contact successfully deleted
                // notify previous activity by sending code 100
                Intent i = getIntent();
                // send result code 100 to notify about contact deletion
                setResult(100, i);
                finish();
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }

        return null;
    }

    /**
     * After completing background task Dismiss the progress dialog
     * **/
    protected void onPostExecute(String file_url) {
        // dismiss the dialog once contact deleted
        pDialog.dismiss();

    }

}
} 


12-05 19:46:28.287: E/AndroidRuntime(1161): FATAL EXCEPTION: AsyncTask #
212-05 19:46:28.287: E/AndroidRuntime(1161): java.lang.RuntimeException: An error occured while executing doInBackground()
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.os.AsyncTask$3.done(AsyncTask.java:299)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at java.util.concurrent.FutureTask.run(FutureTask.java:239)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at java.lang.Thread.run(Thread.java:841)
12-05 19:46:28.287: E/AndroidRuntime(1161): Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:5908)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.view.ViewRootImpl.invalidateChildInParent(ViewRootImpl.java:869)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.view.ViewGroup.invalidateChild(ViewGroup.java:4253)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.view.View.invalidate(View.java:10482)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.widget.TextView.invalidateRegion(TextView.java:4591)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.widget.TextView.invalidateCursor(TextView.java:4534)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.widget.TextView.spanChange(TextView.java:7412)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.widget.TextView$ChangeWatcher.onSpanAdded(TextView.java:9103)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.text.SpannableStringBuilder.sendSpanAdded(SpannableStringBuilder.java:979)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:688)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:588)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.text.Selection.setSelection(Selection.java:76)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.text.Selection.setSelection(Selection.java:87)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.text.method.ArrowKeyMovementMethod.initialize(ArrowKeyMovementMethod.java:302)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.widget.TextView.setText(TextView.java:3759)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.widget.TextView.setText(TextView.java:3629)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.widget.EditText.setText(EditText.java:80)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.widget.TextView.setText(TextView.java:3604)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at fr.paris8.contactcloud.MajContactActivity$GetDetailContact.doInBackground(MajContactActivity.java:162)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at fr.paris8.contactcloud.MajContactActivity$GetDetailContact.doInBackground(MajContactActivity.java:1)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at android.os.AsyncTask$2.call(AsyncTask.java:287)
12-05 19:46:28.287: E/AndroidRuntime(1161):     at java.util.concurrent.FutureTask.run(FutureTask.java:234)
12-05 19:46:28.287: E/AndroidRuntime(1161):     ... 4 more

12-05 19:46:36.289: E/WindowManager(1161): Activity fr.paris8.contactcloud.MajContactActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{41803700 V.E..... R.....ID 0,0-480,144} that was originally added here
12-05 19:46:36.289: E/WindowManager(1161): android.view.WindowLeaked: Activity fr.paris8.contactcloud.MajContactActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{41803700 V.E..... R.....ID 0,0-480,144} that was originally added here
12-05 19:46:36.289: E/WindowManager(1161):  at android.view.ViewRootImpl.(ViewRootImpl.java:345)
12-05 19:46:36.289: E/WindowManager(1161):  at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:239)
12-05 19:46:36.289: E/WindowManager(1161):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
12-05 19:46:36.289: E/WindowManager(1161):  at android.app.Dialog.show(Dialog.java:281)
12-05 19:46:36.289: E/WindowManager(1161):  at fr.paris8.contactcloud.MajContactActivity$GetDetailContact.onPreExecute(MajContactActivity.java:120)
12-05 19:46:36.289: E/WindowManager(1161):  at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
12-05 19:46:36.289: E/WindowManager(1161):  at android.os.AsyncTask.execute(AsyncTask.java:534)
12-05 19:46:36.289: E/WindowManager(1161):  at fr.paris8.contactcloud.MajContactActivity.onCreate(MajContactActivity.java:81)
12-05 19:46:36.289: E/WindowManager(1161):  at android.app.Activity.performCreate(Activity.java:5133)
12-05 19:46:36.289: E/WindowManager(1161):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
12-05 19:46:36.289: E/WindowManager(1161):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
12-05 19:46:36.289: E/WindowManager(1161):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
12-05 19:46:36.289: E/WindowManager(1161):  at android.app.ActivityThread.access$600(ActivityThread.java:141)
12-05 19:46:36.289: E/WindowManager(1161):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
12-05 19:46:36.289: E/WindowManager(1161):  at android.os.Handler.dispatchMessage(Handler.java:99)
12-05 19:46:36.289: E/WindowManager(1161):  at android.os.Looper.loop(Looper.java:137)
12-05 19:46:36.289: E/WindowManager(1161):  at android.app.ActivityThread.main(ActivityThread.java:5103)
12-05 19:46:36.289: E/WindowManager(1161):  at java.lang.reflect.Method.invokeNative(Native Method)
12-05 19:46:36.289: E/WindowManager(1161):  at java.lang.reflect.Method.invoke(Method.java:525)
12-05 19:46:36.289: E/WindowManager(1161):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
12-05 19:46:36.289: E/WindowManager(1161):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-05 19:46:36.289: E/WindowManager(1161):  at dalvik.system.NativeStart.main(Native Method)

    I do not see or just wrong?

    thank you for the help!


  • Pouti

    Thank you for your quick response,

    However I did not understand, I see you’ve moved EditText in OnCreate method, and display the data of the contact in the OnPostExecute method.

    I do not understand what you mean here, I must display a message

                   // json success tag
                success = json.getInt(TAG_SUCCESS);
                if (success == 1) {
                    // successfully received contact details
                    JSONArray personneObj = json.getJSONArray(TAG_CONTACT); // JSON Array

                    // get first contact object from JSON Array
                    JSONObject personne = personneObj.getJSONObject(0);

                    // contact with this idCONTACT found



                }else{
                    // contact with idCONTACT not found
                }

    Then in OnPostExecute tell me that there is a mistake, because the person is not variable defines global.

    protected void onPostExecute(String file_url) {
    // dismiss the dialog once got all details
    pDialog.dismiss();

                   // display contact data in EditText
                    txtNom.setText(personne.getString(TAG_NOM));
                    txtPrenom.setText(personne.getString(TAG_PRENOM));
                    txtNummobile.setText(personne.getString(TAG_NUMMOBILE));
                    txtNumfixe.setText(personne.getString(TAG_NUMFIXE));
                    txtEmail.setText(personne.getString(TAG_EMAIL));
                    txtAdresse.setText(personne.getString(TAG_ADRESSE));
                    txtProfession.setText(personne.getString(TAG_PROFESSION));
}

    It’s just at this level, or I’m stuck.

    Thank you very much for help.


  • Hariharan

    Try this..

    You cannot do the initialize inside doInBackground you need to with in the onCreate. Same like that you cannot set the text inside the doInBackground need to in onPostExecute.

    @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.maj_contact);

    // save button
    btnSav = (Button) findViewById(R.id.btnSav);
    btnSup = (Button) findViewById(R.id.btnSup);

    // Edit Text
                        txtNom = (EditText) findViewById(R.id.inputNom);
                        txtPrenom = (EditText) findViewById(R.id.inputPrenom);
                        txtNummobile = (EditText) findViewById(R.id.inputNumMobile);
                        txtNumfixe = (EditText) findViewById(R.id.inputNumFixe);
                        txtEmail = (EditText) findViewById(R.id.inputEmail);
                        txtAdresse = (EditText) findViewById(R.id.inputAdresse);
                        txtProfession = (EditText) findViewById(R.id.inputProfession);


    // getting contact details from intent
    Intent i = getIntent();

    // getting contact id (idCONTACT) from intent
    idCONTACT = i.getStringExtra(TAG_IDCONTACT);

    // Getting complete contact details in background thread
    new GetDetailContact().execute();

    // save button click event
    btnSav.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // starting background task to update contact
            new SavDetailContact().execute();
        }
    });

    // Delete button click event
    btnSup.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // deleting contact in background thread
            new SupContact().execute();
        }
    });

}

/**
 * Background Async Task to Get complete contact details
 * */
class GetDetailContact extends AsyncTask {

    /**
     * Before starting background thread Show Progress Dialog
     * */
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(MajContactActivity.this);
        pDialog.setMessage("Chargement du contact. Veuillez patientez...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(true);
        pDialog.show();
    }

    /**
     * Getting contact details in background thread
     * */
    protected String doInBackground(String... params) {

                // Check for success tag
                int success;
                try {
                    // Building Parameters
                    List params1 = new ArrayList();
                    params1.add(new BasicNameValuePair("idCONTACT", idCONTACT));

                    // getting contact details by making HTTP request
                    // Note that contact details url will use GET request
                    JSONObject json = jsonParser.makeHttpRequest(url_detail_contact, "GET", params1);

                    // check your log for json response
                    Log.d("Detail contact unique", json.toString());

                    // json success tag
                    success = json.getInt(TAG_SUCCESS);
                    if (success == 1) {
                        // successfully received contact details
                        JSONArray personneObj = json.getJSONArray(TAG_CONTACT); // JSON Array

                        // get first contact object from JSON Array
                        JSONObject personne = personneObj.getJSONObject(0);

                        // contact with this idCONTACT found



                    }else{
                        // contact with idCONTACT not found
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
        return null;
    }
    /**
     * After completing background task Dismiss the progress dialog
     * **/
    protected void onPostExecute(String file_url) {
        // dismiss the dialog once got all details
        pDialog.dismiss();

                       // display contact data in EditText
                        txtNom.setText(personne.getString(TAG_NOM));
                        txtPrenom.setText(personne.getString(TAG_PRENOM));
                        txtNummobile.setText(personne.getString(TAG_NUMMOBILE));
                        txtNumfixe.setText(personne.getString(TAG_NUMFIXE));
                        txtEmail.setText(personne.getString(TAG_EMAIL));
                        txtAdresse.setText(personne.getString(TAG_ADRESSE));
                        txtProfession.setText(personne.getString(TAG_PROFESSION));
    }
}

/**
 * Background Async Task to  Save contact Details
 * */
class SavDetailContact extends AsyncTask {

    /**
     * Before starting background thread Show Progress Dialog
     * */
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(MajContactActivity.this);
        pDialog.setMessage("Sauvegarde du contact ...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(true);
        pDialog.show();
    }

    /**
     * Saving contact
     * */
    protected String doInBackground(String... args) {

        // getting updated data from EditTexts
        String nom = txtNom.getText().toString();
        String prenom = txtPrenom.getText().toString();
        String numero_mobile = txtNummobile.getText().toString();
        String numero_fixe = txtNumfixe.getText().toString();
        String email = txtEmail.getText().toString();
        String adresse = txtAdresse.getText().toString();
        String profession = txtProfession.getText().toString();

        // Building Parameters
        List params = new ArrayList();

        params.add(new BasicNameValuePair(TAG_IDCONTACT, idCONTACT));
        params.add(new BasicNameValuePair(TAG_NOM, nom));
        params.add(new BasicNameValuePair(TAG_PRENOM, prenom));
        params.add(new BasicNameValuePair(TAG_NUMMOBILE, numero_mobile));
        params.add(new BasicNameValuePair(TAG_NUMFIXE, numero_fixe));
        params.add(new BasicNameValuePair(TAG_EMAIL, email));
        params.add(new BasicNameValuePair(TAG_ADRESSE, adresse));
        params.add(new BasicNameValuePair(TAG_PROFESSION, profession));

        // sending modified data through http request
        // Notice that update contact url accepts POST method
        JSONObject json = jsonParser.makeHttpRequest(url_update_contact,"POST", params);

        // check json success tag
        try {
            int success = json.getInt(TAG_SUCCESS);


        } catch (JSONException e) {
            e.printStackTrace();
        }

        return null;
    }

    /**
     * After completing background task Dismiss the progress dialog
     * **/
    protected void onPostExecute(String file_url) {
        // dismiss the dialog once contact uupdated
        pDialog.dismiss();

           if (success == 1) {
                // successfully updated
                Intent i = getIntent();
                // send result code 100 to notify about contact update
                setResult(100, i);
                finish();
            } else {
                // failed to update contact
            }
    }
}

    EDIT :

    class GetDetailContact extends AsyncTask {

        /**
         * Before starting background thread Show Progress Dialog
         * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(MajContactActivity.this);
            pDialog.setMessage("Chargement du contact. Veuillez patientez...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        /**
         * Getting contact details in background thread
         * */
        protected JSONObject doInBackground(String... params) {

                    // Check for success tag
                    int success;
                    try {
                        // Building Parameters
                        List params1 = new ArrayList();
                        params1.add(new BasicNameValuePair("idCONTACT", idCONTACT));

                        // getting contact details by making HTTP request
                        // Note that contact details url will use GET request
                        JSONObject json = jsonParser.makeHttpRequest(url_detail_contact, "GET", params1);

                        // check your log for json response
                        Log.d("Detail contact unique", json.toString());

                        // json success tag
                        success = json.getInt(TAG_SUCCESS);
                        if (success == 1) {
                            // successfully received contact details
                            JSONArray personneObj = json.getJSONArray(TAG_CONTACT); // JSON Array

                            // get first contact object from JSON Array
                            JSONObject personne = personneObj.getJSONObject(0);

                            // contact with this idCONTACT found

                           return personne;

                        }else{
                            // contact with idCONTACT not found
                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
            return null;
        }
        /**
         * After completing background task Dismiss the progress dialog
         * **/
        protected void onPostExecute(JSONObject personne) {
            // dismiss the dialog once got all details
            pDialog.dismiss();

                           // display contact data in EditText
                            txtNom.setText(personne.getString(TAG_NOM));
                            txtPrenom.setText(personne.getString(TAG_PRENOM));
                            txtNummobile.setText(personne.getString(TAG_NUMMOBILE));
                            txtNumfixe.setText(personne.getString(TAG_NUMFIXE));
                            txtEmail.setText(personne.getString(TAG_EMAIL));
                            txtAdresse.setText(personne.getString(TAG_ADRESSE));
                            txtProfession.setText(personne.getString(TAG_PROFESSION));
        }
    }