沉浸在我的程序开发中，我遇到了一个在我看来并不是真的在说话的错误。
所以这是我的 logcat 顺序和 java 代码:
当我点击 ListView 中的项目时，它应该返回更新的联系信息。
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<String, String, String> {
/**
* 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<NameValuePair> params1 = new ArrayList<NameValuePair>();
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<String, String, String> {
/**
* 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<NameValuePair> params = new ArrayList<NameValuePair>();
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<String, String, String> {
/**
* 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<NameValuePair> params = new ArrayList<NameValuePair>();
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$DecorView{41803700 V.E..... R.....ID 0,0-480,144} that was originally added here
12-05 19:46:36.289: E/WindowManager(1161): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:345)
12-05 19:46:36.289: E/WindowManager(1161): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:239)
12-05 19:46:36.289: E/WindowManager(1161): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
12-05 19:46:36.289: E/WindowManager(1161): at android.app.Dialog.show(Dialog.java:281)
12-05 19:46:36.289: E/WindowManager(1161): at fr.paris8.contactcloud.MajContactActivity$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)
我没看到还是错了？
谢谢你的帮助!
最佳答案
试试这个..
您不能在 doInBackground 中进行初始化，您需要在 onCreate 中进行初始化。就像你不能在 doInBackground 中设置文本一样，需要在 onPostExecute 中设置。
@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<String, String, String> {
/**
* 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<NameValuePair> params1 = new ArrayList<NameValuePair>();
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<String, String, String> {
/**
* 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<NameValuePair> params = new ArrayList<NameValuePair>();
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
}
}
}
编辑:
class GetDetailContact extends AsyncTask<String, void, JSONObject> {
/**
* 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<NameValuePair> params1 = new ArrayList<NameValuePair>();
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));
}
}
关于java - ANDROID 使用 AsyncTask MySQL 通过 JSON 更新 ListView，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20413961/