Android SDK instance code analysis-accelerometer play (2)

Ii. configuration file description

<? XML version ="1.0"Encoding ="UTF-8"?>

<Manifest xmlns: Android = http://schemas.android.com/apk/res/android
Android: versioncode ="1"

Android: versionname ="1.0"

Package ="Com. example. Android. accelerometerplay">

<Application Android: icon ="@ Drawable/icon"Android: Label ="@ String/app_name">

<Activity Android: Name =". Accelerometerplayactivity"

Android: Label ="@ String/app_name"

Android: screenorientation ="Portrait"Android: theme ="@ Android: style/theme. notitlebar. fullscreen">

<Intent-filter>

<Action Android: Name ="Android. Intent. Action. Main"/>

<Category Android: Name ="Android. Intent. Category. launcher"/>

</Intent-filter>

</Activity>

</Application>

<Uses-SDK Android: minsdkversion ="5"> </Uses-SDK>

<Uses-Permission Android: Name ="Android. Permission. Vibrate"> </Uses-Permission>

<Uses-Permission Android: Name ="Android. Permission. wake_lock"> </Uses-Permission>

</Manifest>

<Manifest>The element is the root element of the androidmanifest. xml file. The following describes each attribute used:

Xmlns: Android: defines the namespace for Android, which should always be set to http://schemas.android.com/apk/res/android

Android: versioncode: an internal version number of the application, which is not displayed to the user.

Android: versionname: version number of the application displayed to the user

Package: Full Java package name of the application

<Application>An element is used to declare an application. It has attributes that affect all components in the application. The following describes attributes used in this application:

Android: icon: the icon of the entire application, which is displayed in the starter. It is defined in the resource that can be traced, for example, @ drawable/icon. It does not have a default icon.

Android: Label: the label of the entire application that the user can read. It is displayed under the application icon. Defined in string resource.

<Activity>The element declares the visible user interface in the application. Each activity object in the application corresponds to an <activity> element in this list file. The attributes of the element used in this application are described as follows:

Android: Name: Specifies the name of the implementation class of the activity. The ". Class Name" format is used. The package name uses the value defined in the package attribute of the <manifest> element.

Android: Label: This attribute specifies the user-visible label of this activity. When this activity is displayed, this label will be displayed on the screen. In this example, the name of the application is always set.

Android: screenorientation: This attribute sets the orientation of the activity on the screen of the device. In this example, it is set to portrait.

Android: Theme: set the theme style of the activity. In this example, the theme style is set to no title bar.

<Intent-filter>Child element that specifies the intent object type that the activity, service, and broadcast Explorer components can respond to. In this example, the following two child elements are contained:

<Action>Child element: A <intent-filter> element must contain one or more <action> elements. If it does not exist, it will not accept requests from any intent object. In this example, the android. Intent. Action. Main Value is specified for the Android: Name attribute, indicating that this activity is the application entry.

<Category>Child element: This element adds a category to the <intent-filter> element. In this example, the android. Intent. Category. launcher value is specified for the Android: Name attribute, indicating that the application will be placed in the app launcher of the Android system.

<Uses-SDK>Element: Specifies the android API level on which the application depends.

<Uses-Permission>Element: you have applied for the following permissions for correct operations:

Android. Permission. vibrate: apply for the right to use the Vibration Sensor

Android. Permission. wake_lock: apply for the permission to wake up the lock