custom content provider example in android

ContentProvider to other applications to expose the database information as an example to explain the basic use of contentprovider. The creation and use of SQLite database in Android, this article is no longer introduced, not clear please read this articlethe simple and practical application of SQLite databaseAssuming that the reader has learned the use of the SQLite database and has established the databa

Create a Content Provider The content provider Manages access to the central data warehouse. You implement a provider that implements one or more classes in an Android application, and adds some elements in the manifest file. You

. Although the use of other methods can also share data, but the way data access will vary depending on how the data is stored, such as: the use of file-based data sharing, the need for file operations to read and write data, the use of sharedpreferences shared data, You need to read and write data using the Sharedpreferences API. The benefit of using ContentProvider to share data is to unify the way data is accessed.Steps for using the ContentProvider class1,

We learned how to access data from other applications in our own programs. Overall, the idea is very simple, just need to get the content URI of the application, and then use Contentresolver for crud operation. But have you ever wondered how the applications that provide the external access interface implement this functionality? How do they ensure data security so that private data is not leaked? 7.3.1 steps to create a

Content Provider is an abstract data encapsulation and data access mechanism. For example, SQLite is a data source provided by Android devices and can be encapsulated into a content provider. To read and write data through

in ContentProviderContentProvider Scheme for (content provider) is already defined by Android,scheme: content://The host name (or authority) is used to uniquely identify this contentprovider, and the external caller can find it based on this identity.Pathcan be used to represent the data we want to manipulate, and the

, categorized by the installation package. We can take a look at those packages with the SQLite database under the ls–r/data/data/*/databases . For example, some DB built into Android.These *.db files are on the SQLite database. The Android database is usually created at the time of the first visit. To approach the database using:sqlite3 /data/data/Here are some common SQLite commands:Sqlite>.exit Exit SQLi

VND2. If the content URI ends with a path, then android.cursor.dir/is followed, and if the content URI ends with an ID, then the android.cursor.item/is followed up3, finally connected to the Vnd.Therefore, for content://com.example.app.providder/table1 this content URI, its corresponding MIME type can be written as:Vn

activity, and the service provider activity should meet the conditions. Then it is about the Android system. It is responsible for identifying qualified activity service providers and giving intent to the activity service providers. Then, this acitivity performs corresponding operations based on the remaining information in the intent. As shown above, intent contains two parts: 1. Information of the activi

The examples in this article describe how Android programming uses content providers to store them. Share to everyone for your reference, specific as follows: The primary role of content providers (ContentProvider) is to share data externally, and if data is shared externally by content providers, other applications c