Android app widget (1)

1. appwidgetproviderinfo object:

Provides metadata (meta-data) for app widgets, including layout and update frequency. This object is defined in the Res/XML directory.

<Appwidget-provider

Xmlns: Android = "http://schemas.android.com/apk/res/android"

Android: minwidth = "294dp"

Android: minheight = "72dp"

Android: updateperiodmillis = "86400000" // This is the update interval.

Android: initiallayout = "@ layout/example_appwidget" // This is the layout of APP widgets.

</Appwidget-provider>

2. inherit from appwidgetprovider:

Defines the basic lifecycle functions of APP widgets and implements corresponding methods.

3. Configure in androidmanifest, for example:

<Cycler Android: Name = "">

<Intent-filter>

// Indicates that the widget can be broadcasted by appwidget_updata.

<Action Android: Name = "android. appwidget. Action. appwidget_updata"/>

</Intent-filter>

<Meta-data Android: Name = "android. appwidget. provider"

// This is the appwidgetproviderinfo address.

Android: Resource = "@ XML/example_appwidget_info"/>

</Cycler>