AndEngine - 无法实例化Activity

Question

我是Android开发的新手,在使用AndEngine时遇到了问题.我试图运行一个空的应用程序,但得到一个运行时错误,如下所示:

04-01 21:56:16.326: W/dalvikvm(280): Unable to resolve superclass of Lcom/MyApps/TestApp/TestAppActivity; (31)
04-01 21:56:16.326: W/dalvikvm(280): Link of class 'Lcom/MyApps/TestApp/TestAppActivity;' failed
04-01 21:56:16.336: D/AndroidRuntime(280): Shutting down VM
04-01 21:56:16.336: W/dalvikvm(280): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
04-01 21:56:16.376: E/AndroidRuntime(280): FATAL EXCEPTION: main
04-01 21:56:16.376: E/AndroidRuntime(280): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.MyApps.TestApp/com.MyApps.TestApp.TestAppActivity}: java.lang.ClassNotFoundException: com.MyApps.TestApp.TestAppActivity in loader dalvik.system.PathClassLoader[/data/app/com.MyApps.TestApp-1.apk]
04-01 21:56:16.376: E/AndroidRuntime(280):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
04-01 21:56:16.376: E/AndroidRuntime(280):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-01 21:56:16.376: E/AndroidRuntime(280):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-01 21:56:16.376: E/AndroidRuntime(280):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-01 21:56:16.376: E/AndroidRuntime(280):  at android.os.Handler.dispatchMessage(Handler.java:99)
04-01 21:56:16.376: E/AndroidRuntime(280):  at android.os.Looper.loop(Looper.java:123)
04-01 21:56:16.376: E/AndroidRuntime(280):  at android.app.ActivityThread.main(ActivityThread.java:4627)
04-01 21:56:16.376: E/AndroidRuntime(280):  at java.lang.reflect.Method.invokeNative(Native Method)
04-01 21:56:16.376: E/AndroidRuntime(280):  at java.lang.reflect.Method.invoke(Method.java:521)
04-01 21:56:16.376: E/AndroidRuntime(280):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-01 21:56:16.376: E/AndroidRuntime(280):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-01 21:56:16.376: E/AndroidRuntime(280):  at dalvik.system.NativeStart.main(Native Method)
04-01 21:56:16.376: E/AndroidRuntime(280): Caused by: java.lang.ClassNotFoundException: com.MyApps.TestApp.TestAppActivity in loader dalvik.system.PathClassLoader[/data/app/com.MyApps.TestApp-1.apk]
04-01 21:56:16.376: E/AndroidRuntime(280):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
04-01 21:56:16.376: E/AndroidRuntime(280):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
04-01 21:56:16.376: E/AndroidRuntime(280):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
04-01 21:56:16.376: E/AndroidRuntime(280):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
04-01 21:56:16.376: E/AndroidRuntime(280):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
04-01 21:56:16.376: E/AndroidRuntime(280):  ... 11 more

使用过的清单:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.MyApps.TestApp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".TestAppActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

我尝试将整个包名称替换为.TestAppActivity,但没有任何运气.但是,当我从Activity而不是BaseGameActivity扩展TestAppActivity时,它起作用了.

任何帮助表示赞赏,萨米

Answer 1

这个错误Unable to resolve superclass of Lcom/MyApps/TestApp/TestAppActivity以及它继承时的工作原理Activity表明你没有在你的APK中包含AndEngine库 - 因此BaseGameActivity无法在运行时找到它.

确保AndEngine依赖项libs位于Android项目的目录中; 不只是添加到Eclipse类路径中.

事实上,如果您拥有最新的Android Eclipse插件,那么任何依赖项都将自动包含在您的APK中,如果您只是将它们放入其中libs.