Pessoal boa tarde, estou com problemas no meu projeto, deve ser um probleminha simples, mas não encontrei ele. A mensagem de errado é a seguinte: FATAL EXCEPTION: AsyncTask #1 e essa é a causa: Can't create handler inside thread that has not called Looper.prepare()
Logcat:
03-30 15:43:07.793 326-733/com.example.gabriel.agenda E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
Process: com.example.gabriel.agenda, PID: 326
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:300)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
at android.os.Handler.<init>(Handler.java:200)
at android.os.Handler.<init>(Handler.java:114)
at android.widget.Toast$TN.<init>(Toast.java:336)
at android.widget.Toast.<init>(Toast.java:100)
at android.widget.Toast.makeText(Toast.java:250)
at com.example.gabriel.agenda.converter.AlunoConverter.toJson(AlunoConverter.java:41)
at com.example.gabriel.agenda.EnviarDadosServidor.doInBackground(EnviarDadosServidor.java:38)
at com.example.gabriel.agenda.EnviarDadosServidor.doInBackground(EnviarDadosServidor.java:17)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
03-30 15:43:08.096 326-408/com.example.gabriel.agenda D/OpenGLRenderer: endAllStagingAnimators on 0xb4bc3c00 (RippleDrawable) with handle 0x9e87d680
03-30 15:43:08.319 326-326/com.example.gabriel.agenda E/WindowManager: android.view.WindowLeaked: Activity com.example.gabriel.agenda.ListaAlunosActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{37012215 V.E..... R......D 0,0-1368,643} that was originally added here
at android.view.ViewRootImpl.<init>(ViewRootImpl.java:375)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:261)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
at android.app.Dialog.show(Dialog.java:298)
at android.app.ProgressDialog.show(ProgressDialog.java:116)
at android.app.ProgressDialog.show(ProgressDialog.java:104)
at com.example.gabriel.agenda.EnviarDadosServidor.onPreExecute(EnviarDadosServidor.java:27)
at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
at android.os.AsyncTask.execute(AsyncTask.java:535)
at com.example.gabriel.agenda.ListaAlunosActivity.onOptionsItemSelected(ListaAlunosActivity.java:75)
at android.app.Activity.onMenuItemSelected(Activity.java:2892)
at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:404)
at android.support.v7.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:167)
at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:100)
at android.support.v7.app.AppCompatDelegateImplV7.onMenuItemSelected(AppCompatDelegateImplV7.java:646)
at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:811)
at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)
at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:958)
at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:948)
at android.support.v7.widget.ActionMenuView.invokeItem(ActionMenuView.java:618)
at android.support.v7.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:139)
at android.view.View.performClick(View.java:4761)
at android.view.View$PerformClick.run(View.java:19767)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5312)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
03-30 15:43:09.726 326-733/com.example.gabriel.agenda I/Process: Sending signal. PID: 326 SIG: 9Task para enviar dados no Servidor:
@Override
protected void onPreExecute() {
aguarde = ProgressDialog.show(context, "Aguarde", "Enviando dados para servidor...", true, true);
aguarde.show();
}
@Override
protected String doInBackground(Void... params) {
WebCliente webCliente = new WebCliente(context);
AlunoConverter converter = new AlunoConverter(context);
AlunoDAO alunoDAO = new AlunoDAO(context);
List<Aluno> alunoList = alunoDAO.listar();
alunoDAO.close();
String json = converter.toJson(alunoList);
String post = webCliente.post(json);
return post;
}
@Override
protected void onPostExecute(String post) {
aguarde.dismiss();
Toast.makeText(context, post, Toast.LENGTH_LONG).show();
}WebClient:
package com.example.gabriel.agenda;
import android.content.Context;
import android.widget.Toast;
import java.io.IOException;
import java.io.PrintStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Scanner;
/**
* Created by Gabriel on 29/03/2016.
*/
public class WebCliente {
private final Context context;
public WebCliente(Context context) {
this.context = context;
}
public String post(String json){
try {
URL url = new URL("https://www.caelum.com.br/mobile");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestProperty("Content-type", "application/json");
connection.setRequestProperty("Accept", "application/json");
connection.setDoOutput(true);
PrintStream outout = new PrintStream(connection.getOutputStream());
outout.println(json);
connection.connect();
Scanner scanner = new Scanner(connection.getInputStream());
String resposta = scanner.next();
return resposta;
} catch (MalformedURLException e) {
e.printStackTrace();
throw new RuntimeException(e);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}O que significa essa causa Can't create handler inside thread that has not called Looper.prepare()?
