![]() The constructor of the Example class: public class Example In the following example, this attribute is used to preserve You can apply this attribute to every member of a Mark members that are not statically referenced but are still needed by Every member that is not statically linked by theĪpplication is subject to be removed, so this attribute can be used to If you use XML serialization, you may want to preserve theĪttribute. If you instantiate types dynamically, you may want to preserve the You might have code that you call dynamically via The linker will sometimes remove code that you want to I/MonoDroid(17755): at (wrapper dynamic-method) object.95bb4fbe-bef8-4e5b-8e99-ca83a5d7a124 (intptr,intptr,intptr) Į/mono (17755): EXCEPTION handling: System.MissingMethodException: Default constructor not found for type ExampleLibrary.Example.Į/mono (17755): Unhandled Exception: System.MissingMethodException: Default constructor not found for type ExampleLibrary.Example.Į/mono (17755): at (System.Type type, Boolean nonPublic) in :0Į/mono (17755): at (System.Type type) in :0Į/mono (17755): at (Android.OS.Bundle bundle) in :0Į/mono (17755): at _OnCreate_Landroid_os_Bundle_ (IntPtr jnienv, IntPtr native_this, IntPtr native_savedInstanceState) in :0Į/mono (17755): at (wrapper dynamic-method) object:95bb4fbe-bef8-4e5b-8e99-ca83a5d7a124 (intptr,intptr,intptr) I/MonoDroid(17755): at _OnCreate_Landroid_os_Bundle_ (intptr,intptr,intptr) I/MonoDroid(17755): at (Android.OS.Bundle) I/MonoDroid(17755): at (System.Type,bool) I/MonoDroid(17755): UNHANDLED EXCEPTION: System.MissingMethodException: Default constructor not found for type ExampleLibrary.Example. The above example will work with the Don't Link and Link SDK Assemblies options,Īnd will fail with the Link All Assembliesīehavior, generating the following error: E/mono (17755): EXCEPTION handling: System.MissingMethodException: Default constructor not found for type ExampleLibrary.Example. The Link All Assemblies option links all assemblies, which means yourĬode may also be removed if there are no static references. The Link SDK Assemblies option only linksĪssemblies that come with Xamarin.Android.Īll other assemblies (such as your code) are not linked. Is not usually recommended for production builds. Troubleshooting runtime failures, to see if the linker is responsible. Without Linking" application size example used this behavior. The Don't Link option turns off the linker the above "Release Link All Assemblies ( Sdk and User Assemblies).Link SDK Assemblies ( Sdk Assemblies Only).The primary mechanism for controlling the linker is the Linker Behavior ( Linking in Visual Studio)ĭrop-down within the Project Options dialog box. Var o = Activator.CreateInstance (typeof (ExampleLibrary.Example)) Protected override void OnCreate (Bundle bundle) Compiler provides default constructor. Consequently, anything thatĭepends upon the runtime environment won't be detected: // To play along at home, Example must be in a different assembly from MyActivity. (unlinked) package in 1.2.0, and 18% of the unlinked package in 4.0.1. Linking results in a package that is 30% the size of the original Then everything outside of this closure is discarded.įor example, the Hello, Android sample: Configuration The linker then behaves like a garbage collector, continually looking for the assemblies, types, and members thatĪre referenced until the entire closure of referenced assemblies, types, and To determine which assemblies are actually used, which types are actually used,Īnd which members are actually used. The linker employs static analysis of your application Xamarin.Android applications use a linker to reduce the
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