Android 更改导航抽屉项目上的屏幕单击

我是纯Android的新手，来自Xamarin.Forms，所以这里有一个非常基本的问题。我用导航抽屉模板启动了我的项目，我正在尝试更改“hello world”屏幕，当我选择一个导航抽屉项目时，默认情况下会看到该屏幕。我看到content_main.xml中有一个相对布局，它定义了“Hello World”屏幕。如何将我看到的屏幕切换到另一个xml布局？像这样的

    public boolean onNavigationItemSelected(MenuItem item) {
    int id = item.getItemId();

    if (id == R.id.screen1) {
        // set current screen to content_main.xml
    } else if (id == R.id.screen2) {
        // set current screen to my_new_screen.xml
    } else if (id == R.id.screen3) {
        // set current screen to my_other_new_screen.xml
    }

Intent intent = new Intent(CurrentActivity.this, NewActivity.class);
startActivity(intent);

---

您可以按如下方式在项目上启动新活动

    public boolean onNavigationItemSelected(MenuItem item) {
    int id = item.getItemId();

    if (id == R.id.screen1) {
        // set current screen to content_main.xml
    } else if (id == R.id.screen2) {
        // set current screen to my_new_screen.xml
    } else if (id == R.id.screen3) {
        // set current screen to my_other_new_screen.xml
    }

Intent intent = new Intent(CurrentActivity.this, NewActivity.class);
startActivity(intent);

或者，如果您使用的是片段，则可以通过此代码更改片段

Fragment newFragment = new YourNewFragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_container_name, newFragment);
transaction.commit();

---

如果您正在实现导航抽屉，那么您肯定会使用片段。因此，您可以使用以下代码：-

public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
   Fragment fragment = null;
    int id = item.getItemId();
    String get_title = item.getTitle().toString();

    if (id == R.id.nav_quick_list) {

        fragment = new CreateQuickList();

    } else if (id == R.id.nav_my_account) {
        fragment = new MyAccount();

    }


    if (fragment != null) {
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.replace(R.id.content_frame, fragment);
        ft.commit();
    }

    title_tv.setText(get_title);
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}

你可以这样做

   public void onDrawerItemSelected(View view, int position) {
        displayView(position);
    }

    private void displayView(int position) {
        Fragment fragment = null;

        switch (position) {
            case 0:
                fragment = new OneFragment();
                break;
            case 1:
                fragment = new TwoFragment();
                break;
            case 2:
                fragment = new ThreeFragment();
                break;


        }

        if (fragment != null) {
            FragmentManager fragmentManager = getSupportFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.container_body, fragment);
            fragmentTransaction.commit();


        }
    }

当您使用导航抽屉时，您应该为抽屉中的每个项目创建片段。 所以，从创建片段开始，并如上所述将其传递给各个项目 祝你好运