Android中的ClassNotFoundException

Question

Hy！

我得到一个ClassNotFoundException但不知道为什么。

代码：

startActivityForResult(new Intent(Main.this,MView.class),1); 



package android.korn.geopictureview; 

import com.google.android.maps.*; 

public class MView extends MapActivity{ 

    @Override 
    protected void onCreate(android.os.Bundle arg0) { 
     super.onCreate(arg0); 
     setContentView(R.layout.mapview); 
    } 



    @Override 
    protected boolean isRouteDisplayed() { 
     // TODO Auto-generated method stub 
     return false; 
    } 

} 

清单：

<application android:icon="@drawable/icon" android:label="@string/app_name"> 
<uses-library android:name="com.google.android.maps" /> 
    <activity android:name=".Main" android:theme="@android:style/Theme.NoTitleBar" 
       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=".MView"/> 
</application> 
<uses-permission android:name="android.permission.INTERNET" /> 

登录：

05-28 16:00:28.183: ERROR/AndroidRuntime(1925): java.lang.NoClassDefFoundError: android.korn.geopictureview.MView 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at android.korn.geopictureview.Main.onActivityResult(Main.java:49) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at android.app.Activity.dispatchActivityResult(Activity.java:3828) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at android.app.ActivityThread.deliverResults(ActivityThread.java:3325) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at android.app.ActivityThread.handleSendResult(ActivityThread.java:3371) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at android.app.ActivityThread.access$2700(ActivityThread.java:119) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1893) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at android.os.Handler.dispatchMessage(Handler.java:99) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at android.os.Looper.loop(Looper.java:123) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at android.app.ActivityThread.main(ActivityThread.java:4363) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at java.lang.reflect.Method.invokeNative(Native Method) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at java.lang.reflect.Method.invoke(Method.java:521) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at dalvik.system.NativeStart.main(Native Method) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925): Caused by: java.lang.IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at dalvik.system.DexFile.defineClass(Native Method) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:209) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:203) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573) 
05-28 16:00:28.183: ERROR/AndroidRuntime(1925):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532) 

Answer 1

这似乎发生在您的项目中有多个对maps.jar的引用时，请检查它是否已添加并仅引用一次。