The first line of code: Android Reading notes--13th Android Advanced Tips

(i) Global access to the context

1. Create Applicationutil class inherits from Application class:

1  Public classApplicationutilextendsApplication {2 3     Private Staticcontext context;4 5 @Override6      Public voidonCreate () {7Context =Getapplicationcontext ();8     }9 Ten      Public StaticContext GetContext () { One         returncontext; A     } -}

2. In the Androidmanifest.xml file, change the Name property of the application tag (if no attribute is added) to: Package name. applicationutil.

3. Use the static method of the Applicationutil class to obtain a global context in a place that requires global access to a context (such as a toast method in a non-activity Class) GetContext.

(ii) Transfer of objects using intent

There are two main ways to pass an object using intent: Serializable mode and parcelable mode.

1, Serializable Way

The object passed in this way must be an object that implements the serializable interface, with the following steps:

The first line of code: Android Reading notes--13th Android Advanced Tips