Initial use of Android Studio, ContentProvider created

Links to tutorial articles for Android Studio

Http://www.open-open.com/lib/view/open1468121363300.html

Content providers can expose their own databases to other users ' applications for access.

* Create a class Provider extend inherit ContentProvider

* Configure content providers in the manifest file. Xml. Configure the full path and host name.

Android:name= "Cn.itcast.contentprovider.PersonDBProvider"

* A URI that defines some data operations in the provider class

Add some specified special paths using the Urimarcher method

Matcher.adduri ("Cn.itcast.contentprovider.personprovider", "Insert", 1); Matcher.adduri (" Cn.itcast.contentprovider.personprovider "," delete ", 2); Matcher.adduri (" Cn.itcast.contentprovider.personprovider "," Update ", 3); Matcher.adduri (" Cn.itcast.contentprovider.personprovider "," Query ", 4);

* To achieve provider additions and deletions of the search method.

***

Querying data by Using content providers

* Get the parser for the content provider

Contentresolver Resolver=getcontentresolver ();

* Use resolver to delete the operation of the check.

NULL NULL NULL null);

while (Cursor.movetonext ()) {
int id = cursor.getint (cursor.getcolumnindex ("id"));
String name = cursor.getstring (Cursor.getcolumnindex ("name"));
String number = cursor.getstring (Cursor.getcolumnindex ("number"));
Person p = new person (ID, name, number);
Persons.add (P);
}
Cursor.close ();

Initial use of Android Studio, ContentProvider created