我運行Eclipse和模擬器調試Android應用程序,並在應用程序的重新啓動應用程序時,我得到這個例外,Android的 - 例外編譯和運行
03-23 02:19:51.384: E/AndroidRuntime(605): FATAL EXCEPTION: main
03-23 02:19:51.384: E/AndroidRuntime(605): java.lang.RuntimeException: Unable to instantiate application android.app.Application: java.lang.NullPointerException
03-23 02:19:51.384: E/AndroidRuntime(605): at android.app.LoadedApk.makeApplication(LoadedApk.java:482)
03-23 02:19:51.384: E/AndroidRuntime(605): at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3938)
03-23 02:19:51.384: E/AndroidRuntime(605): at android.app.ActivityThread.access$1300(ActivityThread.java:123)
03-23 02:19:51.384: E/AndroidRuntime(605): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1185)
03-23 02:19:51.384: E/AndroidRuntime(605): at android.os.Handler.dispatchMessage(Handler.java:99)
03-23 02:19:51.384: E/AndroidRuntime(605): at android.os.Looper.loop(Looper.java:137)
03-23 02:19:51.384: E/AndroidRuntime(605): at android.app.ActivityThread.main(ActivityThread.java:4424)
03-23 02:19:51.384: E/AndroidRuntime(605): at java.lang.reflect.Method.invokeNative(Native Method)
03-23 02:19:51.384: E/AndroidRuntime(605): at java.lang.reflect.Method.invoke(Method.java:511)
03-23 02:19:51.384: E/AndroidRuntime(605): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-23 02:19:51.384: E/AndroidRuntime(605): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-23 02:19:51.384: E/AndroidRuntime(605): at dalvik.system.NativeStart.main(Native Method)
03-23 02:19:51.384: E/AndroidRuntime(605): Caused by: java.lang.NullPointerException
03-23 02:19:51.384: E/AndroidRuntime(605): at android.app.LoadedApk.initializeJavaContextClassLoader(LoadedApk.java:362)
03-23 02:19:51.384: E/AndroidRuntime(605): at android.app.LoadedApk.getClassLoader(LoadedApk.java:305)
03-23 02:19:51.384: E/AndroidRuntime(605): at android.app.LoadedApk.makeApplication(LoadedApk.java:474)
03-23 02:19:51.384: E/AndroidRuntime(605): ... 11 more
但這並不真的說錯誤發生在我的代碼中。任何想法爲什麼這可能會發生,以及如何防止它?
,這是小應用程序的整個清單:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.problemio"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="15" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".ProblemioActivity"
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=".AddProblemActivity"
android:label="@string/add_problem" />
<activity
android:name=".LoginActivity"
android:label="@string/login" />
<activity
android:name=".MyProblemsActivity"
android:label="@string/your_problems" />
<activity
android:name=".LogoutActivity"
android:label="@string/app_name" />
<activity
android:name=".CreateProfileActivity"
android:label="@string/create_account" />
<activity
android:name=".ProblemActivity"
android:label="@string/problem_page_header" />
<activity
android:name=".SuggestSolutionActivity"
android:label="@string/suggest_solution_header" />
<activity
android:name=".SuggestedSolutionActivity"
android:label="@string/suggested_solution_header" />
<activity
android:name=".ViewSolutionsActivity"
android:label="@string/view_solutions_header" />
<activity
android:name=".TopicActivity"
android:label="@string/topic_header" />
</application>
</manifest>
謝謝!
您的解決方案中是否有任何應用程序?你是否在Manifest上聲明瞭這個名字? – 2012-03-23 02:27:44
@Tiago實際上有一個完整的應用程序,儘管這條消息....我也會張貼清單。 – GeekedOut 2012-03-23 02:31:21
請參閱http://stackoverflow.com/questions/9039017/android-app-application-cannot-be-instantiated-due-to-nullpointerexception。在這種情況下,清理該項目會解決問題。無論出於何種原因。也許這也會對你有所幫助 – 207 2012-03-23 02:57:19