执行RunTimeException execute（）方法时，我正在关注AsyncTask's。
我通过单击下面显示其监听器的按钮来执行AsyncTask
这个错误日志。
05-15 12:56:50.045: W/dalvikvm(25830): threadid=12: thread exiting with uncaught exception (group=0x415052a0)
05-15 12:56:50.070: E/AndroidRuntime(25830): FATAL EXCEPTION: AsyncTask #1
05-15 12:56:50.070: E/AndroidRuntime(25830): java.lang.RuntimeException: An error occured while executing doInBackground()
05-15 12:56:50.070: E/AndroidRuntime(25830): at android.os.AsyncTask$3.done(AsyncTask.java:299)
05-15 12:56:50.070: E/AndroidRuntime(25830): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
05-15 12:56:50.070: E/AndroidRuntime(25830): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
05-15 12:56:50.070: E/AndroidRuntime(25830): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
05-15 12:56:50.070: E/AndroidRuntime(25830): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
05-15 12:56:50.070: E/AndroidRuntime(25830): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
05-15 12:56:50.070: E/AndroidRuntime(25830): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
05-15 12:56:50.070: E/AndroidRuntime(25830): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
05-15 12:56:50.070: E/AndroidRuntime(25830): at java.lang.Thread.run(Thread.java:856)
05-15 12:56:50.070: E/AndroidRuntime(25830): Caused by: java.lang.IllegalArgumentException: the name must not be empty: null
05-15 12:56:50.070: E/AndroidRuntime(25830): at android.os.Parcel.readException(Parcel.java:1429)
05-15 12:56:50.070: E/AndroidRuntime(25830): at android.os.Parcel.readException(Parcel.java:1379)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.google.android.gms.internal.x$a$a.a(Unknown Source)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.google.android.gms.auth.GoogleAuthUtil.getToken(Unknown Source)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.google.android.gms.auth.GoogleAuthUtil.getToken(Unknown Source)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential.getToken(GoogleAccountCredential.java:192)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential$RequestHandler.intercept(GoogleAccountCredential.java:217)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:836)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:412)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:345)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:463)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.fooworks.foomanager.EventsActivity$1$1.doInBackground(EventsActivity.java:94)
05-15 12:56:50.070: E/AndroidRuntime(25830): at com.fooworks.foomanager.EventsActivity$1$1.doInBackground(EventsActivity.java:1)
05-15 12:56:50.070: E/AndroidRuntime(25830): at android.os.AsyncTask$2.call(AsyncTask.java:287)
05-15 12:56:50.070: E/AndroidRuntime(25830): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
05-15 12:56:50.070: E/AndroidRuntime(25830): ... 5 more
05-15 12:56:50.100: D/dalvikvm(25830): GC_CONCURRENT freed 331K, 7% free 12486K/13319K, paused 13ms+13ms, total 47ms
以下是代码：
package com.fooworks.foomanager;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import android.accounts.Account;
import android.accounts.AccountManager;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import com.google.android.gms.auth.GoogleAuthException;
import com.google.android.gms.auth.GoogleAuthUtil;
import com.google.android.gms.auth.GooglePlayServicesAvailabilityException;
import com.google.android.gms.auth.UserRecoverableAuthException;
import com.google.api.client.extensions.android.http.AndroidHttp;
import com.google.api.client.googleapis.extensions.android.accounts.GoogleAccountManager;
import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential;
import com.google.api.client.googleapis.extensions.android.gms.auth.GooglePlayServicesAvailabilityIOException;
import com.google.api.client.googleapis.extensions.android.gms.auth.UserRecoverableAuthIOException;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.calendar.CalendarScopes;
import com.google.api.services.calendar.model.CalendarList;
public class EventsActivity extends EntriesActivity {
public static final String CLIENT_ID = "850381918262.apps.googleusercontent.com";
public static final String API_KEY = "AIzaSyC7t5n2akn2HmDrcbbnkiMPGBhG9Hhuyqc";
public static final String PREF_GOOGLEACCOUNT_NAME = "googleAccountName";
public static final int REQUEST_ACCOUNT_PICKER = 8; // take care not to
// overlap with requests
// in superclass
final HttpTransport transport = AndroidHttp.newCompatibleTransport();
final JsonFactory jsonFactory = new GsonFactory();
GoogleAccountCredential credential;
com.google.api.services.calendar.Calendar calendarClient;
void chooseGoogleAccount() {
GoogleAccountManager googleAccountManager = new GoogleAccountManager(this);
Account[] accounts = googleAccountManager.getAccounts();
}
private static final String SCOPE = "oauth2:https://www.googleapis.com/auth/userinfo.profile";
//private static final String SCOPE = "oauth2:https://www.googleapis.com/auth/calendar";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
System.out.println("HERE!!!");
System.out.println(CalendarScopes.CALENDAR);
credential = GoogleAccountCredential.usingOAuth2(this, CalendarScopes.CALENDAR);
calendarClient = new com.google.api.services.calendar.Calendar.Builder(
transport, jsonFactory, credential).setApplicationName("Client Event Manager/1.0")
.build();
Button testButton = (Button) findViewById(R.id.test);
testButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... params) {
try {
//THIS IS THE LINE CAUSING THE ERROR:
CalendarList calendarList = calendarClient.calendarList().list().execute();
System.out.println(calendarList.getItems());
} catch (final GooglePlayServicesAvailabilityIOException availabilityException) {
System.out.println("Hello Exception 0!");
System.out.println(availabilityException.getConnectionStatusCode());
} catch (UserRecoverableAuthIOException userRecoverableException) {
System.out.println("Hello Exception !");
EventsActivity.this.startActivityForResult(userRecoverableException.getIntent(), 99);
} catch (IOException e) {
System.out.println("Hello Exception 2!");
e.printStackTrace();
}
return null;
}
}.execute();
}
});
}
有人可以说明导致此错误的原因以及解决方法吗？
答案 0 :(得分：0)
试试这种方式
new AsyncTask<String, Void, String>() {
@Override
protected String doInBackground(Void... params) {
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
}
}