Eclipse Mobile Mousw Bedienungsanleitung PDF herunterladen (Seite 16)

super.onCreate(icicle);

setContentView(R.layout.main);

}

Things to note about this source snippet:

• SaySomething is a normal Java class, with a package and imports, as

expected.

• SaySomething extends a base Android class named Activity, which is

located in the android.app package.

• The onCreate() method is the entry point to this activity, receiving an

argument of type Bundle. The Bundle is a class which is essentially a

wrapper around a map or hashmap. Elements required for construction

are passed in this parameter. This tutorial does not examine this

parameter.

• The setContentView(..) is responsible for creating the primary UI

using the R.layout.main argument. This is an identifier representing the

main layout found in the resources of the application.

The next section reviews the resources for the sample application.

Resources for the application

Resources in Android are organized into a subdirectory of the project named res, as

described previously. Resources fall into three primary categories:

Drawables

This folder contains graphics files, such as icons and bitmaps

Layouts

This folder contains XML files that represent the layouts and views of the

application. These will be examined in detail below.

Values

This folder contains a file named strings.xml. This is the primary means for

string localization for the application.

The next section dissects the main.xml file to review the sample application's

primary UI resources.

main.xml

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Develop Android applications with Eclipse

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Eclipse Mobile Mousw Bedienungsanleitung Seite 16