web content providers

In Android applications, we can use explicit intent (Explicit Intent) to directly access the activity of other applications, but this is limited to the scope of activity, and if you need to use data from other applications, you need to use another component. This is known as content provider (Provider).1. Introduction to content providers (Porviders)

The volume provider stores and obtains data so that the data can be accessed by all applications. They are the only way to share data between applications; there is no public storage area accessible to all Android software packages. Android is a common data type (audio, video, image, personal contact information, and so on) loaded with a lot of content providers. You can see that some of them are listed in

Content Providers, contentproviders Content providers manage access to a structured set of data. they encapsulate the data, and provide mechanisms for defining data security. content providers are the standard interface that conne

Add two permissions FirstThese two are permissions to modify the desktop's databaseYou can't change it without adding it!Get data directly from content providers,Static arraylistModify the content similarly by the URL to modify,I will not write the code specifically.(8) Launcher3 customized ContentProvider content

1. Calendar ProviderThe calendar Provider is a repository for a user ' s calendar events. The Calendar Provider API allows you to perform query, insert, update,and Delete operations on calendars, events, attendees, reminders, and so on.2. BasicsThe content providers offered by the Android platform (including the Calendar Provider) typically expose data as A set of tables based on arelational database model,

　　content Provider is primarily used to implement data sharing among different applications , providing a complete set of mechanisms that allow one program to access data from another program while guaranteeing the security of the data being accessed. Currently, using a content provider is a standard way for Android to share data across programs.Unlike two global read-write modes in file storage and sharepr

1.1. What is a content providerContent provider is one of the four components of Android that can share data from your app to external usersContent providers unify the way data is accessed without having to take different access policies for different data typesContent providers encapsulate data, exposing only the data we want to provide to other programsData cha

, its database holds a lot of contact information, if the data are not allowed to access third-party programs, I am afraid that many of the functions of the application will be greatly compromised. In addition to the phone book, there are SMS, media Library and other programs to achieve cross-program data sharing function, and the use of the technology is of course the content provider, the following we will be in-depth discussion of this technology.I