AppProvider.java

public class AppProvider extends ContentProvider {
    
    private static final UriMatcher uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
  
     static {
        /*
         * The calls to addURI() go here, for all of the content URI patterns that the provider
         * should recognize. For this snippet, only the calls for table 3 are shown.
         */

        /*
         * Sets the integer value for multiple rows in table 3 to 1. Notice that no wildcard is used
         * in the path
         */
        uriMatcher.addURI("com.example.android.AppName", "words", 1);

        /*
         * Sets the code for a single row to 2. In this case, the "#" wildcard is
         * used. "content://com.example.android.AppName/words/3" matches, but
         * "content://com.example.android.AppName/words doesn't.
         */
        uriMatcher.addURI("com.example.app.provider", "words/#", 2);
    }

  ....
    
}