我正在开发一个详细信息表单，当我将Intent中的值传递给此表单时，它不起作用并打印此错误：android.os.NetworkOnMainThreadException。这是我的代码：
public class VoyageDetails extends Activity{
private ProgressDialog pDialog;
String idp;
TextView villeDe;
TextView villeA;
TextView DateD;
TextView HeureD;
TextView Nom;
TextView Prenom;
TextView prix;
TextView voiture;
TextView tel;
TextView autre;
JSONObject Empleado;
JSONParser jsonParser = new JSONParser();
private static final String url_detalles_empleado = "http://sorifgroupcom.ipage.com/Android/Voyage_Details.php";
private static final String TAG_SUCCESS = "success";
private static final String TAG_VoyageDetails = "VoyageDetails";
private static final String TAG_IDP = "idp";
private static final String TAG_VILLEDE = "ville_depart";
private static final String TAG_VILLEA = "ville_arrivee";
private static final String TAG_DATED = "date_depart";
private static final String TAG_HEURED = "heure_depart";
private static final String TAG_NOM = "nom";
private static final String TAG_PRENOM = "prenom";
private static final String TAG_VOITURE = "voiture";
private static final String TAG_TEL = "tel";
private static final String TAG_PRIX = "prix";
private static final String TAG_AUTRE = "autre";
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.voyage_details);
Intent i = getIntent();
// getting Empleado id (pid) from intent
idp = i.getStringExtra(TAG_IDP);
Log.i("tesssst", idp);
villeDe = (TextView) findViewById(R.id.VilleDe);
villeA = (TextView) findViewById(R.id.villeA);
DateD = (TextView) findViewById(R.id.DateD);
HeureD = (TextView) findViewById(R.id.HeureD);
Nom = (TextView) findViewById(R.id.Nom);
Prenom = (TextView) findViewById(R.id.Prenom);
prix = (TextView) findViewById(R.id.PrixDe);
tel = (TextView) findViewById(R.id.telD);
voiture = (TextView) findViewById(R.id.Voiture);
autre = (TextView) findViewById(R.id.AutreD);
new GetEmpleadoDetails().execute();
}
class GetEmpleadoDetails extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(VoyageDetails.this);
pDialog.setMessage("Loading Empleado details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting Empleado details in background thread
* */
protected String doInBackground(String... params) {
// updating UI from Background Thread
// Check for success tag
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("idp", idp));
// getting Empleado details by making HTTP request
// Note that Empleado details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_detalles_empleado, "GET", params);
// check your log for json response
Log.d("Single Empleado Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received Empleado details
JSONArray VoyageDetailsObj = json
.getJSONArray(TAG_VoyageDetails); // JSON Array
// get first Empleado object from JSON Array
Empleado = VoyageDetailsObj.getJSONObject(0);
// Empleado with this pid found
// Edit Text
// display Empleado data in EditText
}else{
// Empleado with pid 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();
try {
villeDe.setText(Empleado.getString(TAG_VILLEDE));
villeA.setText(Empleado.getString(TAG_VILLEA));
DateD.setText(Empleado.getString(TAG_DATED));
HeureD.setText(Empleado.getString(TAG_HEURED));
Nom.setText(Empleado.getString(TAG_NOM));
Prenom.setText(Empleado.getString(TAG_PRENOM));
prix.setText(Empleado.getString(TAG_PRIX));
tel.setText(Empleado.getString(TAG_TEL));
voiture.setText(Empleado.getString(TAG_VOITURE));
autre.setText(Empleado.getString(TAG_AUTRE));
} catch (Exception e) {
// TODO: handle exception
}
}
}
}
logCat print：
1-10 18:00:17.992: E/AndroidRuntime(850): FATAL EXCEPTION: AsyncTask #3
01-10 18:00:17.992: E/AndroidRuntime(850): java.lang.RuntimeException: An error occured while executing doInBackground()
01-10 18:00:17.992: E/AndroidRuntime(850): at android.os.AsyncTask$3.done(AsyncTask.java:299)
01-10 18:00:17.992: E/AndroidRuntime(850): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
01-10 18:00:17.992: E/AndroidRuntime(850): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
01-10 18:00:17.992: E/AndroidRuntime(850): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
01-10 18:00:17.992: E/AndroidRuntime(850): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
01-10 18:00:17.992: E/AndroidRuntime(850): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
01-10 18:00:17.992: E/AndroidRuntime(850): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
01-10 18:00:17.992: E/AndroidRuntime(850): at java.lang.Thread.run(Thread.java:856)
01-10 18:00:17.992: E/AndroidRuntime(850): Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
01-10 18:00:17.992: E/AndroidRuntime(850): at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4609)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:835)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.view.View.requestLayout(View.java:15129)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.view.View.requestLayout(View.java:15129)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.view.View.requestLayout(View.java:15129)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.view.View.requestLayout(View.java:15129)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.view.View.requestLayout(View.java:15129)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.widget.TableLayout.requestLayout(TableLayout.java:226)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.view.View.requestLayout(View.java:15129)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.view.View.requestLayout(View.java:15129)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.widget.TextView.checkForRelayout(TextView.java:6309)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.widget.TextView.setText(TextView.java:3547)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.widget.TextView.setText(TextView.java:3405)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.widget.TextView.setText(TextView.java:3380)
01-10 18:00:17.992: E/AndroidRuntime(850): at org.Soufiane.voyagesociale.VoyageDetails$GetEmpleadoDetails.doInBackground(VoyageDetails.java:134)
01-10 18:00:17.992: E/AndroidRuntime(850): at org.Soufiane.voyagesociale.VoyageDetails$GetEmpleadoDetails.doInBackground(VoyageDetails.java:1)
01-10 18:00:17.992: E/AndroidRuntime(850): at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-10 18:00:17.992: E/AndroidRuntime(850): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
01-10 18:00:17.992: E/AndroidRuntime(850): ... 5 more
01-10 18:00:21.491: E/BufferQueue(35): [org.Soufiane.voyagesociale/org.Soufiane.voyagesociale.VoyageDetails] drainQueueLocked: BufferQueue has been abandoned!
01-10 18:00:22.040: E/WindowManager(850): Activity org.Soufiane.voyagesociale.VoyageDetails has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4149bdd0 that was originally added here
01-10 18:00:22.040: E/WindowManager(850): android.view.WindowLeaked: Activity org.Soufiane.voyagesociale.VoyageDetails has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4149bdd0 that was originally added here
01-10 18:00:22.040: E/WindowManager(850): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:374)
01-10 18:00:22.040: E/WindowManager(850): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:292)
01-10 18:00:22.040: E/WindowManager(850): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
01-10 18:00:22.040: E/WindowManager(850): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
01-10 18:00:22.040: E/WindowManager(850): at android.view.Window$LocalWindowManager.addView(Window.java:547)
01-10 18:00:22.040: E/WindowManager(850): at android.app.Dialog.show(Dialog.java:277)
01-10 18:00:22.040: E/WindowManager(850): at org.Soufiane.voyagesociale.VoyageDetails$GetEmpleadoDetails.onPreExecute(VoyageDetails.java:85)
01-10 18:00:22.040: E/WindowManager(850): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
01-10 18:00:22.040: E/WindowManager(850): at android.os.AsyncTask.execute(AsyncTask.java:534)
01-10 18:00:22.040: E/WindowManager(850): at org.Soufiane.voyagesociale.VoyageDetails.onCreate(VoyageDetails.java:69)
01-10 18:00:22.040: E/WindowManager(850): at android.app.Activity.performCreate(Activity.java:5008)
01-10 18:00:22.040: E/WindowManager(850): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
01-10 18:00:22.040: E/WindowManager(850): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
01-10 18:00:22.040: E/WindowManager(850): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
01-10 18:00:22.040: E/WindowManager(850): at android.app.ActivityThread.access$600(ActivityThread.java:130)
01-10 18:00:22.040: E/WindowManager(850): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
01-10 18:00:22.040: E/WindowManager(850): at android.os.Handler.dispatchMessage(Handler.java:99)
01-10 18:00:22.040: E/WindowManager(850): at android.os.Looper.loop(Looper.java:137)
01-10 18:00:22.040: E/WindowManager(850): at android.app.ActivityThread.main(ActivityThread.java:4745)
01-10 18:00:22.040: E/WindowManager(850): at java.lang.reflect.Method.invokeNative(Native Method)
01-10 18:00:22.040: E/WindowManager(850): at java.lang.reflect.Method.invoke(Method.java:511)
01-10 18:00:22.040: E/WindowManager(850): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-10 18:00:22.040: E/WindowManager(850): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-10 18:00:22.040: E/WindowManager(850): at dalvik.system.NativeStart.main(Native Method)
JsonParser：
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;
}
答案 0 :(得分：2)
您需要删除
runOnUiThread(new Runnable() {
public void run() {
doInbackground 中的
同时将所有初始化移至onCreate
villeDe = (TextView) findViewById(R.id.VilleDe);
villeA = (TextView) findViewById(R.id.villeA);
DateD = (TextView) findViewById(R.id.DateD);
HeureD = (TextView) findViewById(R.id.HeureD);
Nom = (TextView) findViewById(R.id.Nom);
Prenom = (TextView) findViewById(R.id.Prenom);
pvoiture = (TextView) findViewById(R.id.Voiture);
autre = (TextView) findViewById(R.id.AutreD);
所有这些都归onPostExecute
villeDe.setText(Empleado.getString(TAG_VILLEDE));
villeA.setText(Empleado.getString(TAG_VILLEA));
DateD.setText(Empleado.getString(TAG_DATED));
HeureD.setText(Empleado.getString(TAG_HEURED));
Nom.setText(Empleado.getString(TAG_NOM));
Prenom.setText(Empleado.getString(TAG_PRENOM));
prix.setText(Empleado.getString(TAG_PRIX));
tel.setText(Empleado.getString(TAG_TEL));
voiture.setText(Empleado.getString(TAG_VOITURE));
autre.setText(Empleado.getString(TAG_AUTRE));
答案 1 :(得分：1)
关键词：
runOnUiThread线程执行用户界面，即使在doInBackground中也是如此！这打败了AsyncTask的全部意义!!!! OnProgressUpdate或OnPostExecute 鉴于此，这是一个如何正确执行此操作的示例。请注意，可能存在一些轻微的语法错误。
class GetEmpleadoDetails extends AsyncTask<String, String, JSonObject> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(VoyageDetails.this);
pDialog.setMessage("Loading Empleado details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting Empleado details in background thread
* */
protected JSONObject doInBackground(String... params) {
JSONObject json=null;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("idp", idp));
// getting Empleado details by making HTTP request
// Note that Empleado details url will use GET request
json = jsonParser.makeHttpRequest(
url_detalles_empleado, "GET", params);
} catch (JSONException e) {
e.printStackTrace();
}
return json;
}
@Override
protected void onPostExecute(JSonObject json) {
// json success tag
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received Empleado details
JSONArray VoyageDetailsObj = json
.getJSONArray(TAG_VoyageDetails); // JSON Array
// get first Empleado object from JSON Array
JSONObject Empleado = VoyageDetailsObj.getJSONObject(0);
// Empleado with this pid found
// Edit Text
villeDe = (TextView) findViewById(R.id.VilleDe);
villeA = (TextView) findViewById(R.id.villeA);
DateD = (TextView) findViewById(R.id.DateD);
HeureD = (TextView) findViewById(R.id.HeureD);
Nom = (TextView) findViewById(R.id.Nom);
Prenom = (TextView) findViewById(R.id.Prenom);
prix = (TextView) findViewById(R.id.PrixDe);
tel = (TextView) findViewById(R.id.telD);
voiture = (TextView) findViewById(R.id.Voiture);
autre = (TextView) findViewById(R.id.AutreD);
// display Empleado data in EditText
villeDe.setText(Empleado.getString(TAG_VILLEDE));
villeA.setText(Empleado.getString(TAG_VILLEA));
DateD.setText(Empleado.getString(TAG_DATED));
HeureD.setText(Empleado.getString(TAG_HEURED));
Nom.setText(Empleado.getString(TAG_NOM));
Prenom.setText(Empleado.getString(TAG_PRENOM));
prix.setText(Empleado.getString(TAG_PRIX));
tel.setText(Empleado.getString(TAG_TEL));
voiture.setText(Empleado.getString(TAG_VOITURE));
autre.setText(Empleado.getString(TAG_AUTRE));
}else{
// Empleado with pid not found
}
}
答案 2 :(得分：0)
您无法在UI线程中发出任何http请求。在runOnUiThread方法之前调用此代码：JSONObject json = jsonParser.makeHttpRequest(url_detalles_empleado, "GET", params);