Android SQLite "on delete cascade" not working

Android SQLite ON UPDATE CASCADE not working
Please help me
These are my tables

    String tablausuariocreate="CREATE TABLE IF  NOT EXISTS USUARIO(" +
            "idusuario INTEGER PRIMARY KEY NOT NULL," +
            "DELETED BOOLEAN DEFAULT(0))";

   String tablazonacreate="CREATE TABLE IF  NOT EXISTS ZONA(" +
        "IDZ INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL," +
        "NAME VARCHAR(150)," +
        "idusuario integer," +
        "DELETED BOOLEAN DEFAULT(0)," +
        "FOREIGN KEY(idusuario) REFERENCES USUARIO(idusuario) on update cascade)";

 String tablaclientecreate = "CREATE TABLE IF  NOT EXISTS CLIENTE(" +
        "IDC INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL," +
        "NAME VARCHAR(50) UNIQUE," +
        "IDZ INTEGER," +
        "idusuario integer," +
        "DELETED BOOLEAN DEFAULT(0)," +
        "FOREIGN KEY(IDZ) REFERENCES ZONA(IDZ) on delete set null on update cascade," +
        "FOREIGN KEY(idusuario) REFERENCES USUARIO(idusuario) on update cascade )";