java - 从可绘制菜单中打开一个新活动

Question

所以我试图从可绘制菜单中打开一个新活动。我想从“家”活动到“欢迎”活动。这是我所做的：

编辑：所以我从我的 xml 文件中更改了顺序，但没有解决问题。我更改了 3 篇文章中的一篇中提出的首选项设置，这可能与我的问题相似，但也没有用（反正它们已经没问题了）。我在 Home.class 中更新了更多信息。也许我在那里做错了什么？

这是我的家庭活动：

     package com.example.padmw;

import android.content.ClipData;
import android.content.Intent;
import android.os.Bundle;

import com.example.padmw.Common.Common;
import com.example.padmw.Interface.ItemClickListener;
import com.example.padmw.Model.Category;
import com.example.padmw.ViewHolder.MenuViewHolder;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;

import android.view.MenuItem;
import android.view.View;

import androidx.annotation.NonNull;
import androidx.core.view.GravityCompat;
import androidx.fragment.app.FragmentTransaction;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;

import com.google.android.material.navigation.NavigationView;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.squareup.picasso.Picasso;

import androidx.drawerlayout.widget.DrawerLayout;

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.view.Menu;
import android.widget.TextView;

public class Home extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

    private AppBarConfiguration mAppBarConfiguration;

    FirebaseDatabase database;
    DatabaseReference category;
    TextView txtFullName;
    RecyclerView recycler_menu;
    RecyclerView.LayoutManager layoutManager;
    FirebaseRecyclerAdapter<Category, MenuViewHolder> adapter;

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

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

        toolbar.setTitle("Menu");
        setSupportActionBar(toolbar);

        //Firebase
        database = FirebaseDatabase.getInstance();
        category = database.getReference("Category");

        FloatingActionButton fab = findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Coming soon!", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });


        DrawerLayout drawer = findViewById(R.id.drawer_layout);



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

        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        mAppBarConfiguration = new AppBarConfiguration.Builder(
                R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow,
                R.id.nav_tools, R.id.nav_share, R.id.nav_send)
                .setDrawerLayout(drawer)
                .build();
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);

        //Name for user
        View headerView = navigationView.getHeaderView(0);
        txtFullName = (TextView) headerView.findViewById(R.id.txtFullName);
        txtFullName.setText(Common.currentUser.getName());

        //Load Menu
        recycler_menu = (RecyclerView) findViewById(R.id.recycler_menu);
        recycler_menu.setHasFixedSize(true);
        layoutManager = new LinearLayoutManager(this);
        recycler_menu.setLayoutManager(layoutManager);
        loadMenu();


    }

    private void loadMenu() {
        adapter = new FirebaseRecyclerAdapter<Category, MenuViewHolder>(Category.class, R.layout.menu_item, MenuViewHolder.class, category) {

            @Override
            protected void populateViewHolder(MenuViewHolder viewHolder, Category model, int position) {
                viewHolder.txtNameMenu.setText(model.getName());
                Picasso.get().load(model.getImage())
                        .into(viewHolder.imageView);
                final Category clickItem = model;
                viewHolder.setItemClickListener(new ItemClickListener() {
                    @Override
                    public void onClick(View view, int position, boolean isLongClick) {
                        //Get CategoryId and sed it to NewActivity
                        Intent foodList = new Intent(Home.this, FoodList.class);
                        foodList.putExtra("CategoryId", adapter.getRef(position).getKey());
                        startActivity(foodList);
                    }
                });
            }
        };
        recycler_menu.setAdapter(adapter);


    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.home, menu);
        return true;
    }

    @Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration)
                || super.onSupportNavigateUp();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            startActivity(new Intent(Home.this, SettingsActivity.class));
            return true;

        }

        return super.onContextItemSelected(item);

    }


    @Override

    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
            int id = menuItem.getItemId();
            if (id == R.id.nav_video) {

                startActivity(new Intent(Home.this, Welcome.class));
            }else if (id==R.id.nav_log_out){
                startActivity(new Intent(Home.this, MainActivity.class));
            }

            DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
            drawerLayout.closeDrawer(GravityCompat.START);
            return true;
        }

}

这是我的欢迎活动：

public class Welcome extends AppCompatActivity  {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_welcome);

        if(findViewById(R.id.welcome_container)!= null)
        {
            if(savedInstanceState !=null)
                return;

            getSupportFragmentManager()
                    .beginTransaction().add(R.id.welcome_container,new WelcomeFragment()).commit();
        }

    }



}

这是 WelcomeFragment.java：

public class WelcomeFragment extends Fragment {


    public WelcomeFragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_welcome, container, false);
    }

}

我的问题是，当我单击该项目时，实际上没有任何反应。什么地方出了错？如果你想让我添加布局，请在下面评论。

编辑：我的 activity_home 文件（res\layout\activity_home.xml）：

<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    android:background="@drawable/background"
    tools:openDrawer="start">


        <include
        layout="@layout/app_bar_home"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <com.google.android.material.navigation.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        android:background="@color/colorPrimaryDark"
        app:itemTextColor="@android:color/white"
        app:itemIconTint="@android:color/white"
        app:headerLayout="@layout/nav_header_home"
        app:menu="@menu/activity_home_drawer" />
</androidx.drawerlayout.widget.DrawerLayout>

这是我的 activity_home_drawer 文件（res\menu\activity_home_drawer）：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:showIn="navigation_view">


    <group android:checkableBehavior="single">
        <item
        android:id="@+id/nav_video"
        android:icon="@drawable/ic_ondemand_video_black_24dp"
        android:iconTint="@android:color/white"
        android:title="@string/ItemTitle_5"
        tools:targetApi="o"

            />
        <item
            android:id="@+id/nav_menu"
            android:icon="@drawable/ic_restaurant_black_24dp"
            android:iconTint="@android:color/white"
            android:title="@string/ItemTitle_1"
            tools:targetApi="o"/>

        <item
            android:id="@+id/nav_cart"
            android:icon="@drawable/ic_shopping_cart_black_24dp"
            android:iconTint="@android:color/white"
            android:title="@string/ItemTitle_2"
            tools:targetApi="o" />

        <item
            android:id="@+id/nav_order"
            android:icon="@drawable/ic_access_time_black_24dp"
            android:iconTint="@android:color/white"
            android:title="@string/ItemTitle_3"
            tools:targetApi="o"/>
        <item
            android:id="@+id/nav_log_out"
            android:icon="@drawable/ic_exit_to_app_black_24dp"
            android:iconTint="@android:color/white"
            android:title="@string/ItemTitle_4"
            tools:targetApi="o"/>
    </group>


</menu>

标签： javaandroid