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我想扩展 Android 应用程序并且我想覆盖 oncreate 方法。但出于某种原因,它非常糟糕......只有当我删除 [Application] 时,我才能运行它,但根据此 link我们必须添加 [Application]
[Application]
public class MainApp : Application
{
public MainApp(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
{
}
public override void OnCreate()
{
base.OnCreate();
//app init ...
}
}
谁能告诉我在 xamarin android 中扩展应用程序类的正确方法是什么
更新
如果我不删除 [application] 我就会收到以下错误
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets: Error: Error executing task GenerateJavaStubs: Application cannot have both a type with an [Application] attribute and an [assembly:Application] attribute. (myapp.Droid)
如果我申请然后它编译但它抛出以下运行时错误
[AndroidRuntime] Shutting down VM [AndroidRuntime] FATAL EXCEPTION: main [AndroidRuntime] Process: com.test.myapp, PID: 6524 [AndroidRuntime] java.lang.RuntimeException: Unable to instantiate application com.test.myapp.MainApp: java.lang.ClassNotFoundException: Didn't find class "com.test.myapp.MainApp" on path: DexPathList[[zip file "/data/app/com.test.myapp-1/base.apk"],nativeLibraryDirectories=[/data/app/com.test.myapp-1/lib/arm, /data/app/com.test.myapp-1/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]] [AndroidRuntime] at android.app.LoadedApk.makeApplication(LoadedApk.java:802) [AndroidRuntime] at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5377) [AndroidRuntime] at android.app.ActivityThread.-wrap2(ActivityThread.java) [AndroidRuntime] at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1545) [AndroidRuntime] at android.os.Handler.dispatchMessage(Handler.java:102) [AndroidRuntime] at android.os.Looper.loop(Looper.java:154) [AndroidRuntime] at android.app.ActivityThread.main(ActivityThread.java:6119) [AndroidRuntime] at java.lang.reflect.Method.invoke(Native Method) [AndroidRuntime] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) [AndroidRuntime] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) [AndroidRuntime] Caused by: java.lang.ClassNotFoundException: Didn't find class "com.test.myapp.MainApp" on path: DexPathList[[zip file "/data/app/com.test.myapp-1/base.apk"],nativeLibraryDirectories=[/data/app/com.test.myapp-1/lib/arm, /data/app/com.test.myapp-1/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]] [AndroidRuntime] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) [AndroidRuntime] at java.lang.ClassLoader.loadClass(ClassLoader.java:380) [AndroidRuntime] at java.lang.ClassLoader.loadClass(ClassLoader.java:312) [AndroidRuntime] at android.app.Instrumentation.newApplication(Instrumentation.java:992) [AndroidRuntime] at android.app.LoadedApk.makeApplication(LoadedApk.java:796) [AndroidRuntime] ... 9 more
这是我的 list file
最佳答案
在AssemblyInfo.cs
注释掉
#if DEBUG
[Application(Debuggable=true)]
#else
[Application(Debuggable = false)]
#endif
并将其移动到您的应用程序之上
#if DEBUG
[Application(Debuggable=true)]
#else
[Application(Debuggable = false)]
#endif
public class MainApp : Application
{
public MainApp(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
{
}
public override void OnCreate()
{
base.OnCreate();
//app init ...
}
}
基本上你已经在两个地方定义了它,这就是为什么会出现这个问题。在 AssemblyInfo.cs 中注释掉并添加扩展类即可
仅供引用:
list 没问题
关于c# - 如何在 xamarin android 中扩展应用程序类,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44058574/
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