android - Android帐户同步给我一个类未找到错误……但不应

我只是复制了Android提供的示例同步应用程序中使用的代码（找到here）。

因此它应该可以工作...但是当我将其安装到手机上时，会显示以下错误：

03-10 14:44:54.364: ERROR/AndroidRuntime(9459): Uncaught handler: thread main exiting due to uncaught exception
03-10 14:44:54.374: ERROR/AndroidRuntime(9459): java.lang.RuntimeException: Unable to instantiate service com.test.sync.authenticator.AuthenticationService: java.lang.ClassNotFoundException: com.test.sync.authenticator.AuthenticationService in loader dalvik.system.PathClassLoader@47b2b1a8
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:2764)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at android.app.ActivityThread.access$3200(ActivityThread.java:119)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1917)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at android.os.Looper.loop(Looper.java:123)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at android.app.ActivityThread.main(ActivityThread.java:4363)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at java.lang.reflect.Method.invokeNative(Native Method)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at java.lang.reflect.Method.invoke(Method.java:521)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:862)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at dalvik.system.NativeStart.main(Native Method)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459): Caused by: java.lang.ClassNotFoundException: com.test.sync.authenticator.AuthenticationService in loader dalvik.system.PathClassLoader@47b2b1a8
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:2761)
03-10 14:44:54.374: ERROR/AndroidRuntime(9459):     ... 10 more

它说在我的包中找不到AuthenticatorService类。我有一个AuthenticatorService类，它扩展了Service：

package com.test.sync;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;

public class AuthenticationService extends Service {

        private Authenticator mAuthenticator;

        @Override
        public void onCreate() {
            mAuthenticator = new Authenticator(this);
        }

        @Override
        public IBinder onBind(Intent arg0) {
            return mAuthenticator.getIBinder();
        }


}

这是清单：

<?xml version="1.0" encoding="utf-8"?>
<!--
/**
 * Copyright (c) 2010, The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-->
<manifest
    xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.test.sync"
    android:versionCode="1"
    android:versionName="1.0">
    <uses-permission
        android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission
        android:name="android.permission.USE_CREDENTIALS" />
    <uses-permission
        android:name="android.permission.MANAGE_ACCOUNTS" />
    <uses-permission
        android:name="android.permission.AUTHENTICATE_ACCOUNTS" />
    <uses-permission
        android:name="android.permission.INTERNET" />
    <uses-permission
        android:name="android.permission.WRITE_SETTINGS" />
    <uses-permission
        android:name="android.permission.WRITE_SECURE_SETTINGS" />
    <uses-permission
        android:name="android.permission.READ_CONTACTS" />
    <uses-permission
        android:name="android.permission.WRITE_CONTACTS" />
    <uses-permission
        android:name="android.permission.READ_SYNC_STATS" />
    <uses-permission
        android:name="android.permission.READ_SYNC_SETTINGS" />
    <uses-permission
        android:name="android.permission.WRITE_SYNC_SETTINGS" />

    <uses-sdk android:minSdkVersion="5" />

    <application
        android:icon="@drawable/icon"
        android:label="@string/label">
        <!-- The authenticator service -->
        <service
            android:name=".authenticator.AuthenticationService"
            android:exported="true">
            <intent-filter>
                <action
                    android:name="android.accounts.AccountAuthenticator" />
            </intent-filter>
            <meta-data
                android:name="android.accounts.AccountAuthenticator"
                android:resource="@xml/authenticator" />
        </service>
        <service
            android:name=".syncadapter.SyncService"
            android:exported="true">
            <intent-filter>
                <action
                    android:name="android.content.SyncAdapter" />
            </intent-filter>
            <meta-data
                android:name="android.content.SyncAdapter"
                android:resource="@xml/syncadapter" />
            <meta-data
                android:name="android.provider.CONTACTS_STRUCTURE"
                android:resource="@xml/contacts" />
        </service>
        <activity
            android:name=".authenticator.AuthenticatorActivity"
            android:label="@string/ui_activity_title"
            android:theme="@android:style/Theme.Dialog"
            android:excludeFromRecents="true"
            >
            <!--
                No intent-filter here! This activity is only ever launched by
                someone who explicitly knows the class name
            -->
        </activity>
    </application>
</manifest>

直接来自示例代码。有没有人有过开设帐户的经验？如果有必要，我可以提供更多代码，但这只是从Android提供的示例代码逐行重写而已。运行此命令的设备在2.1上。谢谢！

最佳答案

您的AndroidManifest.xml声明

android:name=".authenticator.AuthenticationService"

AuthenticatorService.java位于com.test.sync包中，并实现AuthenticationService，因此它位于com.test.sync.AuthenticationService中。

您应该从清单中删除.authenticator。