https://developer.android.com/reference/android/content/UriMatcher.html
public class UriMatcher extends Object
Utility class to aid in matching URIs in content providers.
To use this class, build up a tree of UriMatcher
objects. For example:
private static final int PEOPLE = 1; private static final int PEOPLE_ID = 2; private static final int PEOPLE_PHONES = 3; private static final int PEOPLE_PHONES_ID = 4; private static final int PEOPLE_CONTACTMETHODS = 7; private static final int PEOPLE_CONTACTMETHODS_ID = 8; private static final int DELETED_PEOPLE = 20; private static final int PHONES = 9; private static final int PHONES_ID = 10; private static final int PHONES_FILTER = 14; private static final int CONTACTMETHODS = 18; private static final int CONTACTMETHODS_ID = 19; private static final int CALLS = 11; private static final int CALLS_ID = 12; private static final int CALLS_FILTER = 15; private static final UriMatcher sURIMatcher = new UriMatcher(UriMatcher.NO_MATCH); static { sURIMatcher.addURI("contacts", "people", PEOPLE); sURIMatcher.addURI("contacts", "people/#", PEOPLE_ID); sURIMatcher.addURI("contacts", "people/#/phones", PEOPLE_PHONES); sURIMatcher.addURI("contacts", "people/#/phones/#", PEOPLE_PHONES_ID); sURIMatcher.addURI("contacts", "people/#/contact_methods", PEOPLE_CONTACTMETHODS); sURIMatcher.addURI("contacts", "people/#/contact_methods/#", PEOPLE_CONTACTMETHODS_ID); sURIMatcher.addURI("contacts", "deleted_people", DELETED_PEOPLE); sURIMatcher.addURI("contacts", "phones", PHONES); sURIMatcher.addURI("contacts", "phones/filter/*", PHONES_FILTER); sURIMatcher.addURI("contacts", "phones/#", PHONES_ID); sURIMatcher.addURI("contacts", "contact_methods", CONTACTMETHODS); sURIMatcher.addURI("contacts", "contact_methods/#", CONTACTMETHODS_ID); sURIMatcher.addURI("call_log", "calls", CALLS); sURIMatcher.addURI("call_log", "calls/filter/*", CALLS_FILTER); sURIMatcher.addURI("call_log", "calls/#", CALLS_ID); }
URI 节点可以是完全匹配字符串、匹配任何文本的标记“*”或仅匹配数字的标记“#”
Starting from API level Build.VERSION_CODES.JELLY_BEAN_MR2
, paths can start with a leading slash. For example:
sURIMatcher.addURI("contacts", "/people", PEOPLE);
Then when you need to match against a URI, call match(Uri)
, providing the URL that you have been given. You can use the result to build a query, return a type, insert or delete a row, or whatever you need, without duplicating all of the if-else logic that you would otherwise need. For example:
public String getType(Uri url) { int match = sURIMatcher.match(url); switch (match) { case PEOPLE: return "vnd.android.cursor.dir/person"; case PEOPLE_ID: return "vnd.android.cursor.item/person"; ... snip ... return "vnd.android.cursor.dir/snail-mail"; case PEOPLE_ADDRESS_ID: return "vnd.android.cursor.item/snail-mail"; default: return null; } }
标签:sURIMatcher,PEOPLE,int,private,UriMatcher,static,final From: https://www.cnblogs.com/SaraMoring/p/17475413.html