我尝试在android中创建一个词汇循环

public class MainActivity extends AppCompatActivity {
    private String[] vocabulary = {"云计算", "IT互联网", "前端开发", "后端开发", "软件测试", "数据库", "服务器运维", "云原生", "网络通信", "网络安全", "音视频", "多媒体处理", "人工智能", "物联网", "移动开发", "存储", "区块链", "元宇宙"};
    private int currentIndex = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        TextView vocabularyTextView = findViewById(R.id.vocabularyTextView);
        Button nextButton = findViewById(R.id.nextButton);

        vocabularyTextView.setText(vocabulary[currentIndex]);

        nextButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                currentIndex = (currentIndex + 1) % vocabulary.length;
                vocabularyTextView.setText(vocabulary[currentIndex]);
            }
        });
    }
}