Desktop widgets that recently need to write a DateTime are used to associate calendar programs, and desktop widgets have rarely been written before. Not very familiar with this technique, take the time to rearrange it today, and write down a simple time and date process.
The Desktop widget is a tool for displaying some information (some widgets are now being developed with practical functions.) For example, a camera
NullPointerException at android. widget. AbsListView. obtainView at android. widget. ListView. makeAndAddView, androidlistview
When using ExpandableListView, the following error is returned. Online Search found that null was returned in the getGroupView () method of CommonNumberQueryAdapter. Pay attention to the detai
responding (ANR). See Wiktionary sample ' s Appwidgetprovider, an example of an app widget running a service.
See likewise the Exampleappwidgetprovider.java example class.
Receive App Widget broadcast intent
Appwidgetprovider is just a simple class. If you want to receive the app Widget broadcast directly, you can implement your own broadcastreceiver or rewri
. This is an optional activity. When you add an app widget, it is loaded and allowed to modify the settings of the app widget during creation.
The following sections describe how to create these components:
Declare An application widget in the list
First, declare the appwidgetprovider class in the androidmanifest. xml
Objective
This is the main implementation of an Android application, static broadcast, dynamic broadcast two ways to change the content of the widget, that is, in the blog on the basis of the experiment to modify, so the focus of this experiment is the realization of appwidget small parts ~
First, let's simply say what the widget is.
The application window
that allows the widget supplier to obtain more details about the hosted environment of its control instance.
Android 4.2 (API grade 17) introduces the option package and bindAppWidgetIdIfAllowed () method. The lock widget is also introduced.
If your target early-stage device, refer to the original startup as an example.
Plug-in developers can specify some config
Intent object for receiving app widget Broadcast
Appwidgetprovider is just a convenient class. If you want to directly receive app widget broadcasts, You can implement your own broadcastreceiver class or override the onreceive (context, intent) callback method. You need to care about the following types of intent objects:
Action_appwidget_update
Action_appwidget_deleted
Action_appwidget_enabled
Action_appwi
Http://www.cnblogs.com/TerryBlog/archive/2010/08/10/1796896.html
In the previous article about Android app widgets, we continued to expand the previous example and completed a small project, which can be used directly. Address of the previous Article: A Preliminary Study of the android Desktop component [widget]. If you have never touched the app
, it does a total of two steps:A: The system first converts your original Qwidget object to "Item Object".Second: The converted item is then placed in scene scenes.But the first step in the conversion of the generated "item object" and the real item object is still not the same, the conversion generated is just a proxy form of the real item! That is: generated a qgraphicsproxywidget type of agent item!! But for this agent item, we can also use Setzvalue () to set its front and back position!Summ
Reference address: http://mobile.51cto.com/widget-290079.htm
Ndroid widget DevelopmentCase implementation is the content to be introduced in this article, mainly to understand and learnAndroid widget DevelopmentApplication. Let's write about it today.Android widgetOfDevelopmentBecause it's time to wait early in the morning, I won't say it's too specific. Let
Android mobile guard-custom composite widget component layout structure, android component
Since the layout in the settings center entries is similar, you can consider using custom composite controls to simplify the implementation.
URL: http://www.cnblogs.com/wuyudong/p/5909043.html.
Custom composite controls
1. Extra
This article focuses on the concept of Widget development. In this example, we want to develop a Widget on the mobile Android platform. The content of this Widget is obtained from the official website based on the input account. Of course, this process requires an API to process and display the information after obtain
user adds the app widget, so it should perform the underlying settings, such as defining an event handler for the view and starting a temporary services service, if needed. * However, if you have declared a configuration activity, this method will not be invoked when the user adds the app widget, * and is invoked only on subsequent updates.
The configuration
App widgets are also a UI component that can embed a small program (program piece) into the desktop. Compared with common widgets (such as TextView and WebView), the following differences exist:
An App Widget is a live UI component that automatically updates its content;Widgets cannot automatically update their own content and can only passively wait for user calls;In applications, because of the automatic update feature of App widgets, it is suitable
Widget size and font settings
Qpushbutton quit ("quit ");
Quit. Resize (75, 30 );
Quit. setfont (qfont ("Times", 18, qfont: bold ));
Function qwidget: setgeometry (): Take four parameters: the first two are the X and Y corresponding to the coordinates in the upper left corner of the button, which are relative to the parent widget; the last two parameters ar
Android android. support. v4.widget. SlidingPaneLayout slide example, android slide menu
SlidingPaneLayout is used to scroll two views horizontally. The first view is the left side, and the second view is the content view.
Slding_pane_layout.xml
/*** Author: stone * email: aa86799@163.com * time: 15/6/11 15 05 */p
introduction2, Android Desktop Components "widget" exploration
PS: The specific code can be downloaded later.
Again, each appwidget corresponds to Appwidgetprovider, and we need to update these Appwidget objects synchronously.Add a widget to your applicationThe main function of this section is to add appwidget like Launchcer. The knowledge points are as follow
How to clean up the memory simple Widget and androidwidget on the Android DesktopHow to implement a simple Widget for memory cleanup on the Android DesktopWe often see software similar to 360 and Kingsoft mobile guard with a widget that is displayed on the desktop, showing t
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