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Android - Warning:Not annotated parameter overrides @NonNull parameter

Warning:Not annotated parameter overrides @NonNull parameter


本文地址:http://blog.csdn.net/caroline_wendy


Warning:The @NonNull annotation can be used to indicate that a given parameter can not be null.

"@NonNull"的含义是注释非空,如果出现以上警告,就表明参数应该有非空标注;
如添加:
public void onReceive(@NonNull Context context, @NonNull Intent intent);

具体:
It‘s an annotation, but the correct name is NonNull:

protected void onSaveInstanceState(@NonNull Bundle outState)
(And also)
import android.support.annotation.NoNNull;

The purpose is to allow the compiler to warn when certain assumptions are being violated (such as a parameter of a method that should always have a value, as in this particular case, although there are others). From the Support Annotations documentation:

The @NonNull annotation can be used to indicate that a given parameter can not be null.

If a local variable is known to be null (for example because some earlier code checked whether it was null), and you pass that as a parameter to a method where that parameter is marked as @NonNull, the IDE will warn you that you have a potential crash.

They are tools for static analysis. Runtime behavior is not altered at all.

参考: http://stackoverflow.com/questions/24728627/meaning-of-android-studio-error-not-annotated-parameter-overrides-notnull-para





Android - Warning:Not annotated parameter overrides @NonNull parameter