TaskContentProvider.java 文件源码

/**
 Initialize a new matcher object without any matches,
 then use .addURI(String authority, String path, int match) to add matches
 */
public static UriMatcher buildUriMatcher() {

    // Initialize a UriMatcher with no matches by passing in NO_MATCH to the constructor
    UriMatcher uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);

    /*
      All paths added to the UriMatcher have a corresponding int.
      For each kind of uri you may want to access, add the corresponding match with addURI.
      The two calls below add matches for the task directory and a single item by ID.
     */
    uriMatcher.addURI(TaskContract.AUTHORITY, TaskContract.PATH_TASKS, TASKS);
    uriMatcher.addURI(TaskContract.AUTHORITY, TaskContract.PATH_TASKS + "/#", TASK_WITH_ID);

    return uriMatcher;
}