RecyclerView onClickListener 适用于所有片段

Question

我在 activity 中实现了一个 recyclerview，最近我添加了一个 onclick 侦听器。它工作正常，直到我切换到另一个片段并意识到点击也在那里工作所以如果我随机按下屏幕上的某个地方它会给我带来回收站视图中的项目点击。请让我知道如何才能让 recyclerview 只能在一个 activity、主页上点击，而不能在另一个上点击。

HomePage.class

package com.example.movieapp;

import androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.view.GravityCompat;
import androidx.drawerlayout.widget.DrawerLayout;

import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewGroup;

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

import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.android.material.navigation.NavigationBarView;
import com.google.android.material.navigation.NavigationView;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;

public class HomePage extends AppCompatActivity implements NavigationBarView.OnItemSelectedListener {
    private DrawerLayout drawer;

    RecyclerView recylerView;
    MovieAdapter mainAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home_page);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        recylerView = (RecyclerView) findViewById(R.id.rv);
        recylerView.setLayoutManager(new LinearLayoutManager(this));

        FirebaseRecyclerOptions<Model> options =
                new FirebaseRecyclerOptions.Builder<Model>()
                        .setQuery(FirebaseDatabase.getInstance().getReference().child("movie"), Model.class)
                        .build();

        mainAdapter = new MovieAdapter(options);
        recylerView.setAdapter(mainAdapter);

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


        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.addDrawerListener(toggle);
        getSupportActionBar().setTitle(null);
        toggle.setDrawerIndicatorEnabled(true);


        toggle.syncState();
    }

    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.toolbar_menu, menu);
        return super.onCreateOptionsMenu(menu);
    }



    @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_profile:
               // Intent intent = new Intent (getApplicationContext(), UserProfile.class);
               // startActivity(intent);
                getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                        new ProfileFragment()).commit();
                break;
            case R.id.nav_cart:

                getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                        new CartFragment()).commit();
                break;
        }
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

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




    @Override
    public void onStart() {
        super.onStart();
        mainAdapter.startListening();
    }

    @Override
    public void onStop() {
        super.onStop();
        mainAdapter.stopListening();
    }
}

MovieAdapter.class

public class MovieAdapter extends FirebaseRecyclerAdapter<Model,MovieAdapter.myViewHolder> {




    /**
     * Initialize a {@link RecyclerView.Adapter} that listens to a Firebase query. See
     * {@link FirebaseRecyclerOptions} for configuration options.
     *
     * @param options
     */
    public MovieAdapter(@NonNull FirebaseRecyclerOptions<Model> options) {
        super(options);
    }

    @Override
    protected void onBindViewHolder(@NonNull myViewHolder myViewHolder, int i, @NonNull Model model) {
        myViewHolder.name.setText(model.getName());
        myViewHolder.shortDesc.setText(model.getShortDesc());
        myViewHolder.release.setText(model.getRelease());

        Glide.with(myViewHolder.img.getContext()).load(model.getImage()).placeholder(R.drawable.common_google_signin_btn_icon_dark)
                .error(R.drawable.common_google_signin_btn_icon_dark_normal)
                .into(myViewHolder.img);


        myViewHolder.itemView.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View view) {
                Intent intent = new Intent (view.getContext(), MovieDetails.class);
                Bundle bundle = new Bundle();

                String test =  model.getName() + " Selected";

                Toast toast = Toast.makeText(view.getContext(), test ,Toast.LENGTH_SHORT);
                toast.show();

                view.getContext().startActivity(intent);
            }
        });
    }

    @NonNull
    @Override
    public myViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.main_item, parent, false);
        return new myViewHolder(view);
    }

    class myViewHolder extends RecyclerView.ViewHolder {

        ImageView img;
        TextView name,shortDesc,release;

        public myViewHolder(@NonNull View itemView) {
            super(itemView);

            img = (ImageView) itemView.findViewById(R.id.img1);
            name = (TextView) itemView.findViewById(R.id.nametext);
            shortDesc = (TextView) itemView.findViewById(R.id.shortDesctext);
            release = (TextView) itemView.findViewById(R.id.releasetext);
        }
    }
}

Answer 1

它在您每次使用此适配器时都有效，因为 onclicklistener 始终有效，要更改此设置，您可以创建自己的自定义侦听器界面，所以你可以控制是否添加它

public interface OnModelClickListener {
    void onClick(Model model);
}

您需要在适配器中创建实例并 setter 为它

private OnModelClickListener onModelClickListener

public void setOnModelClickListener(OnModelClickListener listener) (
    this.onModelClickListener = listener;
}

在 onBindViewHolder 内部，如果它不为 null

，您将运行这个监听器

@Override
protected void onBindViewHolder(@NonNull myViewHolder myViewHolder, int i, @NonNull Model model) {
    myViewHolder.name.setText(model.getName());
    myViewHolder.shortDesc.setText(model.getShortDesc());
    myViewHolder.release.setText(model.getRelease());

    Glide.with(myViewHolder.img.getContext()).load(model.getImage()).placeholder(R.drawable.common_google_signin_btn_icon_dark)
                .error(R.drawable.common_google_signin_btn_icon_dark_normal)
                .into(myViewHolder.img);

    if (onModelClickListener != null) {
        myViewHolder.itemView.setOnClickListener(v -> {
            onModelClickListener.onClick(model)
        });
    }
}

在您希望侦听器对其进行处理的片段中，您将使用 setter

adapter.setOnModelClickListener(model -> {
    Intent intent = new Intent (view.getContext(), MovieDetails.class);
    Bundle bundle = new Bundle();

    String test =  model.getName() + " Selected";

    Toast toast = Toast.makeText(view.getContext(), test ,Toast.LENGTH_SHORT);
    toast.show();

    startActivity(intent);
});
``

RecyclerView onClickListener 适用于所有片段

RecylerView onClickListener works on all fragment

android

android-fragments

android-recyclerview