Android Web サイトからチュートリアルを学習しています。
しかし、アプリケーションを実行するとUnable to instantiate activity component
、classNotFoundException に関する何かが表示されます。しかし、manifext.xml ファイルには MainActivity が登録されています。どこに問題があるのかわからない。これが完全なエラーログです。
05-03 18:59:00.425: E/AndroidRuntime(20858): FATAL EXCEPTION: main
05-03 18:59:00.425: E/AndroidRuntime(20858): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.android.effectivenavigation/com.example.android.effectivenavigation.MainActivity}: java.lang.ClassNotFoundException: com.example.android.effectivenavigation.MainActivity
05-03 18:59:00.425: E/AndroidRuntime(20858): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1983)
05-03 18:59:00.425: E/AndroidRuntime(20858): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
05-03 18:59:00.425: E/AndroidRuntime(20858): at android.app.ActivityThread.access$600(ActivityThread.java:130)
05-03 18:59:00.425: E/AndroidRuntime(20858): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
05-03 18:59:00.425: E/AndroidRuntime(20858): at android.os.Handler.dispatchMessage(Handler.java:99)
05-03 18:59:00.425: E/AndroidRuntime(20858): at android.os.Looper.loop(Looper.java:137)
05-03 18:59:00.425: E/AndroidRuntime(20858): at android.app.ActivityThread.main(ActivityThread.java:4745)
05-03 18:59:00.425: E/AndroidRuntime(20858): at java.lang.reflect.Method.invokeNative(Native Method)
05-03 18:59:00.425: E/AndroidRuntime(20858): at java.lang.reflect.Method.invoke(Method.java:511)
05-03 18:59:00.425: E/AndroidRuntime(20858): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
05-03 18:59:00.425: E/AndroidRuntime(20858): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
05-03 18:59:00.425: E/AndroidRuntime(20858): at dalvik.system.NativeStart.main(Native Method)
05-03 18:59:00.425: E/AndroidRuntime(20858): Caused by: java.lang.ClassNotFoundException: com.example.android.effectivenavigation.MainActivity
05-03 18:59:00.425: E/AndroidRuntime(20858): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
05-03 18:59:00.425: E/AndroidRuntime(20858): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
05-03 18:59:00.425: E/AndroidRuntime(20858): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
05-03 18:59:00.425: E/AndroidRuntime(20858): at android.app.Instrumentation.newActivity(Instrumentation.java:1053)
05-03 18:59:00.425: E/AndroidRuntime(20858): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1974)
05-03 18:59:00.425: E/AndroidRuntime(20858): ... 11 more
マニフェスト ファイル、AbdroidManifest.xml
<!--
Copyright 2012 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.example.android.effectivenavigation"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="14" />
<application android:label="@string/app_name"
android:icon="@drawable/ic_launcher"
android:theme="@android:style/Theme.Holo.Light.DarkActionBar">
<activity android:name=".MainActivity" android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".CollectionDemoActivity" android:label="@string/demo_collection" />
</application>
</manifest>