如何在android中导航到另一个页面？

// 在按钮点击事件中调用 Intent 函数
Intent intent = new Intent(this, TargetActivity.class);
startActivity(intent);

// 在 Activity 中创建 Fragment
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    Fragment fragment = new TargetFragment();
    fragmentTransaction.add(R.id.container, fragment);
    fragmentTransaction.commit();
}

// 在 Activity 中创建 ViewPager
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ViewPager viewPager = findViewById(R.id.view_pager);
    viewPager.setAdapter(new MyPagerAdapter(getSupportFragmentManager(), getLifecycle()));
    // 设置 ViewPager 的 TabLayout
    TabLayout tabLayout = findViewById(R.id.tab_layout);
    tabLayout.setupWithViewPager(viewPager);
}