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android-studio - 如何使用 RecyclerView 从 CardView 中的每个 Card 实现多个意图？

问题描述

  1. 当我的 CardView 卡被点击时，我想实现一个新的意图。我已经为其中一张卡实施了。适配器是否有任何其他方式能够识别位置并为每张卡带来新的活动？就像使用模板布局将每张卡片链接到它们各自的活动一样。（每张卡片的新活动将具有相同的布局，只是不同的文本和图像）。

  2. 我在卡片上添加了一个 ImageButton。但是，当我单击 ImageButton 时，它并没有将我带到新的活动中。单击卡片边缘/部分而不是图像本身将起作用。我的代码有什么遗漏吗？我似乎无法得到它。

这是我的代码：

MuaActivity.java

    package android.com.example.weddingappfinale;

import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.inputmethod.EditorInfo;

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

import java.util.ArrayList;

import Adapters.MuaAdapter;
import CustomerActivities.ShimaMatinActivity;

public class MuaActivity extends AppCompatActivity {

    private RecyclerView mRecyclerView;
    private MuaAdapter mAdapter;
    private RecyclerView.LayoutManager mLayoutManager;

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

        getSupportActionBar().setTitle("Make Up Artists");
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        final ArrayList<MuaView> muaView = new ArrayList<>();
        muaView.add(new MuaView(R.drawable.mua_image, "Shima Matin Bridal Services"));
        muaView.add(new MuaView(R.drawable.mua_image, "Aake Up Artist Pte Ltd"));
        muaView.add(new MuaView(R.drawable.mua_image, "Lake Up Artist 3Pte Ltd"));
        muaView.add(new MuaView(R.drawable.mua_image, "f Up Artist Pte Ltd"));

        // ArrayList

        mRecyclerView = findViewById(R.id.recycler_view_list);
        mRecyclerView.setHasFixedSize(true);
        mLayoutManager = new LinearLayoutManager(this);
        mAdapter = new MuaAdapter(muaView);

        mRecyclerView.setLayoutManager(mLayoutManager);
        mRecyclerView.setAdapter(mAdapter);

        mAdapter.setOnItemClickListener(new MuaAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {
                Intent i = new Intent (MuaActivity.this, ShimaMatinActivity.class);
                startActivity(i);
                finish();
            }
        });

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.search, menu);

        MenuItem searchItem = menu.findItem(R.id.action_search);
        SearchView searchView = (SearchView) searchItem.getActionView();

        searchView.setImeOptions(EditorInfo.IME_ACTION_DONE);

        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                mAdapter.getFilter().filter(newText);
                return false;
            }
        });
        return true;
    }
}

MuaAdapter.java

    package Adapters;

import android.com.example.weddingappfinale.MuaView;
import android.com.example.weddingappfinale.R;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageButton;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import java.util.ArrayList;
import java.util.List;

public class MuaAdapter extends RecyclerView.Adapter<MuaAdapter.MuaViewHolder> implements Filterable {
    private ArrayList<MuaView> mMuaView;
    private ArrayList<MuaView> mMuaViewFull;
    private OnItemClickListener mListener;

    public interface OnItemClickListener {
        void onItemClick(int position);
    }

    public void setOnItemClickListener(OnItemClickListener listener) {
        mListener = listener;
    }

    public static class MuaViewHolder extends RecyclerView.ViewHolder {
        public ImageButton mImageButton;
        public TextView mTextView1;

        public MuaViewHolder(@NonNull View itemView, final OnItemClickListener listener) {
            super(itemView);
            mImageButton = itemView.findViewById(R.id.mua_imageButton);
            mTextView1 = itemView.findViewById(R.id.mua_title);

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (listener != null) {
                        int position = getAdapterPosition();
                        if (position != RecyclerView.NO_POSITION) {
                            listener.onItemClick(position);
                        }
                    }
                }
            });
        }
    }

    public MuaAdapter(ArrayList<MuaView> muaView) {
        this.mMuaView = muaView;
        mMuaViewFull = new ArrayList<>(muaView);
    }

    @NonNull
    @Override
    public MuaViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.mua_view, parent, false);
        MuaViewHolder mvh = new MuaViewHolder(v, mListener);
        return mvh;
    }

    @Override
    public void onBindViewHolder(@NonNull MuaViewHolder holder, int position) {
        MuaView currentView = mMuaView.get(position);

        holder.mImageButton.setImageResource(currentView.getImageResource());
        holder.mTextView1.setText(currentView.getText1());
    }

    @Override
    public int getItemCount() {
        return mMuaView.size();
    }

    public Filter getFilter() {
        return MuaFilter;
    }

    private Filter MuaFilter = new Filter() {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            List<MuaView> filteredList = new ArrayList<>();

            if (constraint == null || constraint.length() == 0) {
                filteredList.addAll(mMuaViewFull);
            } else {
                String filterPattern = constraint.toString().toLowerCase().trim();

                for (MuaView item : mMuaViewFull) {
                    if (item.getText1().toLowerCase().contains(filterPattern)) {
                        filteredList.add(item);
                    }
                }
            }

            FilterResults results = new FilterResults();
            results.values = filteredList;

            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            mMuaView.clear();
            mMuaView.addAll((ArrayList) results.values);
            notifyDataSetChanged();

        }
    };
}

标签： android-studioandroid-activityandroid-recyclerviewandroid-cardview

解决方案

第一个问题的答案：您可以使用 intent.putExtra() 将项目的位置传递给新活动。在新活动中，您可以使用 intent.getExtra() 读出数字并根据您获得的数字设置您想要的布局内容。这样你就只有一个 Activity 而不是很多。活动一

Intent intent = new Intent(this, Shima.class);
intent.putExtra("position_value", position);
startActivity(intent);

活动二

Intent intent = getIntent();
int position = intent.getIntExtra("position_value", 0); // 0 is the default value
// set a layout based on position with switch case or if...
switch (position){
   case 1:
         setContentView(R.layout.activity_card_one);
         break;
   case 2:
         setContentView(R.layout.activity_card_two);
         break;
....

第二个问题：看这里。

基本上一样的方式

itemView.setOnClickListener(new View.OnClickListener() {...

您可以使用类似这样的方法根据单击的项目设置图像

private Integer images[] = {R.drawable.pic1, R.drawable.pic2, R.drawable.pic3}

和

imageView.setImageResource(images[position]);

（可能位置-1，不确定recyclerView中的第一项是1还是0）

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