在导航抽屉上调用不是片段活动的活动

Question

我是 Android Studio 的新手。 我有一个导航抽屉，我试图调用一个不是片段活动的活动，我对此感到困惑。 我想调用 RecipeActivity 以添加到导航抽屉中，但该活动扩展了 AppCompatActivity 而不是片段。 我怎样才能解决这个问题？

RecipeActivity.java

public class RecipeActivity extends AppCompatActivity {

    List<Recipe> listRecipe;


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

        

        RecyclerView myRv = (RecyclerView) findViewById(R.id.recyclerview_id);
        RecyclerViewAdapter myAdapter = new RecyclerViewAdapter(this, listRecipe);
        myRv.setLayoutManager(new GridLayoutManager(this, 2));
        myRv.setAdapter(myAdapter);
    }

}

HomePage.java 包含导航抽屉代码

public class HomePage extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
    private DrawerLayout drawer;

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

        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);

        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar,
                R.string.navigation_draw_open, R.string.navigation_draw_close);
        drawer.addDrawerListener(toggle);
        toggle.syncState();

        if (savedInstanceState == null){

        getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                new HomeFragment()).commit();

        navigationView.setCheckedItem((R.id.nav_home));
        }

    }

    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        switch(item.getItemId()){
            case R.id.nav_home:
                getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                        new HomeFragment()).commit();
                break;
            case R.id.nav_recipe:
                //startActivity(new Intent(HomePage.this, RecipeActivity.class));


                startActivity(new Intent(getActivity(), RecipeActivity.class));
               //getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                     //  new RecipeActivity()).commit();

               // Intent newIntent = new Intent(HomePage.this, RecipeActivity.class);
               // startActivity(newIntent);
                break;

            case R.id.nav_logout:
                Toast.makeText(this, "Logged out", Toast.LENGTH_SHORT).show();
                 break;
        }

        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

    @Override
    public void onBackPressed() {
        if (drawer.isDrawerOpen(GravityCompat.START)){
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
        super.onBackPressed();
    }
}

谢谢你。

Answer 1

改变你的
startActivity(new Intent(getActivity(), RecipeActivity.class));
到startActivity(new Intent(HomePage.this, RecipeActivity.class));

并确保所有活动都添加到AndroidManifest.xml