RarFile rar=new RarFile("/sdcard/test.rar");
for(RarEntry entry:rar.getEntries(null)){
    ....

}
// check if password protected
rar.isPasswordProtected()
// validate password
rar.validatePassword("pwd")
// set password
rar.setPassword("newPassword")

RarFile rar=new RarFile("/sdcard/test.rar");
rar.extract("one.txt",new UnrarCallback() {
                    @Override
                    public void close() throws IOException {}
                    @Override
                    public void processData(byte[] b, int off, int len) throws IOException {
                        System.out.println(new String(b, off, len, "GBK"));
                    }
                });

RarFile rar=new RarFile("/sdcard/test.rar");
rar.extractAll("/destPath/",null);