zoukankan html css js c++ java

RecyclerView中显示不同的item

测试代码：

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.zzw.testrecyclerview.MainActivity" >

    <android.support.v7.widget.RecyclerView
        android:id="@+id/mRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </android.support.v7.widget.RecyclerView>

</RelativeLayout>

MainActivity.java：

package com.zzw.testrecyclerview;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

public class MainActivity extends Activity {

    RecyclerView mRecyclerView;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        ArrayList<String> mTitles=new ArrayList<String>();
        for(int i=0;i<100;i++){
            mTitles.add("测试数据--"+i);
        }
        
        mRecyclerView=(RecyclerView) findViewById(R.id.mRecyclerView);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        
        MultipleItemAdapter adapter=new MultipleItemAdapter(this, mTitles);
        mRecyclerView.setAdapter(adapter);
        
    }

    
}

MultipleItemAdapter.java：

package com.zzw.testrecyclerview;

import java.util.ArrayList;

import android.content.Context;
import android.support.v7.widget.RecyclerView.Adapter;
import android.support.v7.widget.RecyclerView.ViewHolder;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

public class MultipleItemAdapter extends Adapter<ViewHolder> {

    public static enum ITEM_TYPE {
        ITEM_TYPE_IMAGE, ITEM_TYPE_TEXT
    }

    private LayoutInflater mLayoutInflater;
    private Context mContext;
    private ArrayList<String> mTitle;

    public MultipleItemAdapter(Context context, ArrayList<String> titles) {
        mLayoutInflater = LayoutInflater.from(context);
        mContext = context;
        mTitle = titles;
    }

    @Override
    public int getItemCount() {

        return mTitle == null ? 0 : mTitle.size();
    }

    @Override
    public int getItemViewType(int position) {

        return position % 2 == 0 ? ITEM_TYPE.ITEM_TYPE_IMAGE.ordinal() : ITEM_TYPE.ITEM_TYPE_TEXT.ordinal();
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        if(holder instanceof TextViewHolder){
            ((TextViewHolder) holder).mTextView.setText(mTitle.get(position));
            
        }else if(holder instanceof ImageViewHolder){
            
            ((ImageViewHolder) holder).text.setText(mTitle.get(position));
        }
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (viewType == ITEM_TYPE.ITEM_TYPE_IMAGE.ordinal()) {
            return new ImageViewHolder(mLayoutInflater.inflate(R.layout.item_image, parent, false));
        } else {
            return new TextViewHolder(mLayoutInflater.inflate(R.layout.item_text, parent, false));
        }
    }

    public static class TextViewHolder extends ViewHolder {

        protected static final String TAG = "TextViewHolder";

        TextView mTextView;

        public TextViewHolder(View itemView) {
            super(itemView);
            mTextView = (TextView) itemView.findViewById(R.id.textView);

            itemView.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    Log.d(TAG, "TextViewHolder"+getPosition());
                }
            });
        }
    }

    public static class ImageViewHolder extends ViewHolder {

        protected static final String TAG = "ImageViewHolder";

        ImageView mImage;
        TextView text;

        public ImageViewHolder(View itemView) {
            super(itemView);
            mImage = (ImageView) itemView.findViewById(R.id.image);
            text=(TextView) itemView.findViewById(R.id.text);
            itemView.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    Log.d(TAG, "ImageViewHolder"+getPosition());
                }
            });
        }
    }

}

item_image.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#2196F3"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/image"
        android:src="@drawable/ic_launcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal" />

    <TextView
        android:id="@+id/text"
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="@android:color/holo_red_light"
        android:textSize="20sp" />

</LinearLayout>

item_text.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#E040FB"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView"
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="@android:color/holo_blue_light"
        android:textSize="30sp" />

</LinearLayout>