RecylerViewonClickListener適用于所有片段

我在我的活動中實作了一個 recyclerview，最近我添加了一個 onclick 監聽器。它作業正常，直到我切換到另一個片段并意識到點擊也在那里作業，所以如果我隨機按下螢屏上的某個地方，它會給我帶來回收者視圖中的專案點擊。請讓我知道我怎樣才能讓回收視圖只能在一個活動、主頁上點擊，而不能在另一個活動上點擊。

主頁.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();
    }
}

電影配接器.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);
        }
    }
}

uj5u.com熱心網友回復：

每次使用此配接器時它都有效，因為 onclicklistener 始終有效，要更改此設定，您可以創建自己的自定義偵聽器界面，以便您可以控制是否添加它

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

您需要在配接器中創建實體并為其設定 setter

private OnModelClickListener onModelClickListener

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

在 onBindViewHolder 中，如果它不為空，您將運行此偵聽器

@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)
        });
    }
}

在您希望偵聽器對其進行處理的片段中，您將使用 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);
});
``

標籤：安卓 android-fragments android-recyclerview

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