This example contains two buttons and one image view. When user click the first button, it will popup file browser which let user choose image. The image will be displayed in the image view.

Android FileProvider is a sub class of ContentProvider. It is used to share files between different android apps. It is implemented in android v4 Support Library. So before use it please make sure that you have include supported library in android project build.gradle file as below.

This article will show you an example of how to use intent to invoke an android camera programmatically to take and save pictures. It will also tell you how to display those pictures one by one when the user clicks one picture.

From the previous article, you have learned how to implement an android custom content provider with examples. This article will show you how to call it’s methods to insert, update, delete and query data from it.

This article will give you an example of how to create android contact programmatically and how to insert each android contact field into the contact data table. When clicking the add contact button, it will generate one contact and insert it into android contact tables.

Android contacts is a built-in application. It also provides content providers which the third-party app can use to manipulate android contacts, for example, add, delete, update and query contacts. This article will introduce detailed information about how the android contacts are implemented.

Android contacts information is stored in data table. The data table is saved in SQLite database file /data /data /com.android.providers.contacts /databases /contacts2.db. There are columns data1 to data15 in data table, this article will tell you which column stores what type of contact data.

The android content provider is mainly used for data sharing between different applications. It provides a complete set of mechanisms to allow one program to access data in another program, and also to ensure the security of the data being accessed.