android RecycleView復雜多條目的布局

用RecycleView來實現布局形式。默認僅僅能指定一種布局格式。可是實際中我們的布局常常會用到多種類型的布局方式。怎樣實現呢？

今天來說下經常使用的2鍾方式。

第一種：

通過自己定義addHeadView方法來加入頭布局

RecycleViewWithHead.java

import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.GridLayoutManager.SpanSizeLookup;
import android.support.v7.widget.RecyclerView;
import android.view.View;

public class RecycleViewWithHead extends Activity {

	private RecyclerView rcv;
	// 當前的條目是recyclerView的頭布局
	public static final int HEADER_RECYCLER_VIEW_ITEM = 0;
	// 當前的條目是普通recyclerView的條目
	public static final int NORMAL_RECYCLER_VIEW_ITEM = 1;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_recycle);
		rcv = (RecyclerView) findViewById(R.id.rcv);
		// 設置布局管理
		GridLayoutManager manager = new GridLayoutManager(this, 2);
		// 設置布局管理一條數據占用幾行，假設是頭布局則頭布局自己占用一行
		manager.setSpanSizeLookup(new SpanSizeLookup() {
			@Override
			public int getSpanSize(int postion) {
				if (postion == 0) {
					return 2;
				} else {
					return 1;
				}
			}
		});
		rcv.setLayoutManager(manager);
		MyRecycleAdapter adapter = new MyRecycleAdapter(
				RecycleViewWithHead.this, 20);
		View view = View.inflate(this, R.layout.head, null);
		adapter.addHeadView(view);
		rcv.setAdapter(adapter);
	}
}

布局文件activity_recycle.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">


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


</RelativeLayout>

頭布局文件head.xml

<?
xml version="1.0" encoding="utf-8"?
>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ImageView
        android:id="@+id/iv_head"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_margin="10dp"
        android:src="@drawable/head" />

    <TextView
        android:id="@+id/tv_head"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/iv_head"
        android:layout_toRightOf="@+id/iv_head"
        android:text="這是一張熊貓的圖片" />

    <ImageView
        android:id="@+id/iv_head_bottom"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/iv_head"
        android:layout_toRightOf="@+id/iv_head"
        android:src="@drawable/type" />

</RelativeLayout>

適配器MyRecycleAdapter.java

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.ViewHolder;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Toast;

public class MyRecycleAdapter extends
		RecyclerView.Adapter<MyRecycleAdapterHolder> {

	private View headView;
	private Context mContext;
	private int count;

	MyRecycleAdapter(Context mContext, int count) {
		this.count = count;
		this.mContext = mContext;
	}

	/**
	 * 設置數據源總的條目
	 */
	@Override
	public int getItemCount() {
		//返回條目數加頭布局個數
		return count + 1;
	}

	@Override
	public void onBindViewHolder(MyRecycleAdapterHolder holder,
			final int position) {
		int itemViewType = getItemViewType(position);
		// 頭部
		if (itemViewType == RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM) {
			return;
		} else if (itemViewType == RecycleViewWithHead.NORMAL_RECYCLER_VIEW_ITEM) {//普通條目
			holder.iv_item_icon.setOnClickListener(new OnClickListener() {
				@Override
				public void onClick(View v) {
					Toast.makeText(mContext, (position - 1) + "", 0).show();
				}
			});
		}

	}

	@Override
	public MyRecycleAdapterHolder onCreateViewHolder(ViewGroup parent,
			int viewType) {
		View root = null;
		if (viewType == RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM) {
			root = headView;
		} else {
			root = LayoutInflater.from(mContext).inflate(R.layout.item, parent,
					false);
		}
		return new MyRecycleAdapterHolder(root, viewType);
	}

	/**
	 * 加入自己定義頭部
	 */
	public void addHeadView(View view) {
		this.headView = view;
	}

	@Override
	public int getItemViewType(int position) {

		if (position == 0) {
			return RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM;
		} else {
			return RecycleViewWithHead.NORMAL_RECYCLER_VIEW_ITEM;
		}
	}
}

普通條目的布局文件item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/ll_list"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="2dp"
    android:layout_marginRight="2dp"
    android:layout_marginTop="5dp"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/iv_item_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/item" />

    <TextView
        android:id="@+id/tv_item"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="5dp"
        android:text="這是一僅僅熊貓" />

</LinearLayout>

普通條目的ViewHolder

import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

public class MyRecycleAdapterHolder extends RecyclerView.ViewHolder{
	
	public ImageView iv_item_icon;
	public TextView tv_item;
	public MyRecycleAdapterHolder(View itemView) {
		super(itemView);
	}
	public MyRecycleAdapterHolder(View itemView,int viewType) {
		super(itemView);
		initView(itemView,viewType);
	}
	private void initView(View itemView, int viewType) {
		iv_item_icon = (ImageView) itemView.findViewById(R.id.iv_item_icon);
		tv_item = (TextView) itemView.findViewById(R.id.tv_item);
	}

}

效果圖:

另一種情況類似於淘寶的商品展示我們能夠切換每行顯示的數量，事實上也非常easy

先看下要實現的效果：

我先說下大致的實現思路：

1.給adapter設置一個當前顯示多行還是單行的標記。

2.每次切換視圖時重置標記。並重置RecycleView的LayoutManager。

3.調用adapter.notifyItemRangeChanged(2, adapter.getItemCount());（第一個參數是動畫開始的位置索引）

好了再來看下RecycleViewWithHead.java

import com.example.myrecycleviewdemo.adapter.MyRecycleAdapter;
import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.GridLayoutManager.SpanSizeLookup;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;

public class RecycleViewWithHead extends Activity implements OnClickListener {

	private RecyclerView rcv;
	// 當前的條目是recyclerView的頭布局
	public static final int HEADER_RECYCLER_VIEW_ITEM = 0;
	// 當前的條目是普通recyclerView的條目
	public static final int NORMAL_RECYCLER_VIEW_ITEM = 1;
	// 一行顯示一個
	public static final int RECYCLER_VIEW_ITEM_SINGLE = 3;
	// 一行顯示兩個
	public static final int RECYCLER_VIEW_ITEM_DOUBLE = 4;
	private ImageView iv_switch;// 視圖轉換
	private MyRecycleAdapter adapter;
	private GridLayoutManager manager;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_recycle);
		rcv = (RecyclerView) findViewById(R.id.rcv);
		iv_switch = (ImageView) findViewById(R.id.iv_switch);
		iv_switch.setOnClickListener(this);
		manager = new GridLayoutManager(this, 2);
		// 設置布局管理一條數據占用幾行，假設是頭布局則頭布局自己占用一行
		manager.setSpanSizeLookup(new SpanSizeLookup() {
			@Override
			public int getSpanSize(int postion) {
				if (postion == 0) {
					return 2;
				} else {
					return 1;
				}
			}
		});
		rcv.setLayoutManager(manager);
		adapter = new MyRecycleAdapter(RecycleViewWithHead.this, 20);
		View view = View.inflate(this, R.layout.head, null);
		// 設置當前ViewType
		adapter.setSpanSize(RecycleViewWithHead.RECYCLER_VIEW_ITEM_DOUBLE);
		adapter.addHeadView(view);
		rcv.setAdapter(adapter);
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.iv_switch:
			changeRecycleViewList();
			break;

		default:
			break;
		}

	}

	/**
	 * 改變RecycleView的顯示列數
	 */
	private void changeRecycleViewList() {
		if (adapter != null) {
			int spanSize = adapter.getSpanSize();
			// 當前一行顯示一列
			if (spanSize == RecycleViewWithHead.RECYCLER_VIEW_ITEM_SINGLE) {
				manager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
					@Override
					public int getSpanSize(int position) {
						if (adapter.getItemViewType(position) == RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM) {
							return 2;
						} else {
							return 1;

						}
					}
				});
				adapter.setSpanSize(RecycleViewWithHead.RECYCLER_VIEW_ITEM_DOUBLE);
			}
			// 當前一行顯示兩列
			else if (spanSize == RecycleViewWithHead.RECYCLER_VIEW_ITEM_DOUBLE) {
				manager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
					@Override
					public int getSpanSize(int position) {
						if (adapter.getItemViewType(position) == RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM) {
							return 2;
						} else {
							return 2;
						}
					}
				});
				adapter.setSpanSize(RecycleViewWithHead.RECYCLER_VIEW_ITEM_SINGLE);
			}
			// 第一個參數是動畫開始的位置索引
			adapter.notifyItemRangeChanged(2, adapter.getItemCount());
		}
	}
}

布局文件activity_recycle.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">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rcv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    
    <ImageView 
        android:id="@+id/iv_switch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
		android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_margin="20dp"
        android:src="@drawable/more"
        />

</RelativeLayout>

適配器MyRecycleAdapter.java

import com.example.myrecycleviewdemo.R;
import com.example.myrecycleviewdemo.RecycleViewWithHead;
import com.example.myrecycleviewdemo.R.layout;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.ViewHolder;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Toast;

public class MyRecycleAdapter extends
		RecyclerView.Adapter<MyRecycleAdapterHolder> {

	public View headView;
	public Context mContext;
	public int count;
	private int spanSize;// 當前每行顯示幾列

	public MyRecycleAdapter(Context mContext, int count) {
		this.count = count;
		this.mContext = mContext;
	}

	/**
	 * 設置數據源總的條目
	 */
	@Override
	public int getItemCount() {
		// 返回條目數加頭布局個數
		return count + 1;
	}

	@Override
	public void onBindViewHolder(MyRecycleAdapterHolder holder,
			final int position) {
		int itemViewType = getItemViewType(position);
		// 頭部
		if (itemViewType == RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM) {
			return;
		} else {// 普通條目
			if (itemViewType == RecycleViewWithHead.RECYCLER_VIEW_ITEM_DOUBLE) {// 一行兩列視圖
				holder.iv_item_icon.setOnClickListener(new OnClickListener() {
					@Override
					public void onClick(View v) {
						Toast.makeText(mContext, "2列。" + (position - 1) + "", 0)
								.show();
					}
				});
			} else if (itemViewType == RecycleViewWithHead.RECYCLER_VIEW_ITEM_SINGLE) {// 一行一列視圖
				holder.iv_item_icon_single.setOnClickListener(new OnClickListener() {
					@Override
					public void onClick(View v) {
						Toast.makeText(mContext,"單列，" + (position - 1) + "", 0).show();
					}
				});
			}
		}
	}

	@Override
	public MyRecycleAdapterHolder onCreateViewHolder(ViewGroup parent,
			int viewType) {
		View root = null;
		// 頭部
		if (viewType == RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM) {
			root = headView;
		} else {// 普通條目
			/** 一行顯示一條 */
			if (viewType == RecycleViewWithHead.RECYCLER_VIEW_ITEM_SINGLE) {
				root = LayoutInflater.from(mContext).inflate(R.layout.item_single, parent, false);
			}
			/** 一行顯示兩條 */
			else {
				root = LayoutInflater.from(mContext).inflate(R.layout.item_double, parent, false);
			}
		}
		return new MyRecycleAdapterHolder(root, viewType);
	}

	/**
	 * 加入自己定義頭部
	 */
	public void addHeadView(View view) {
		this.headView = view;
	}

	@Override
	public int getItemViewType(int position) {

		if (position == 0) {
			return RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM;
		} else {
			/** 一行顯示一條 */
			if (spanSize == RecycleViewWithHead.RECYCLER_VIEW_ITEM_SINGLE) {
				return RecycleViewWithHead.RECYCLER_VIEW_ITEM_SINGLE;
				/** 一行顯示兩條 */
			} else {
				return RecycleViewWithHead.RECYCLER_VIEW_ITEM_DOUBLE;
			}
		}
	}

	public int getSpanSize() {
		return spanSize;
	}

	public void setSpanSize(int spanSize) {
		this.spanSize = spanSize;
	}
}

普通條目的ViewHolder

import com.example.myrecycleviewdemo.R;
import com.example.myrecycleviewdemo.R.id;
import com.example.myrecycleviewdemo.RecycleViewWithHead;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

public class MyRecycleAdapterHolder extends RecyclerView.ViewHolder{
	//一行兩列視圖
	public ImageView iv_item_icon;
	public TextView tv_item;
	
	//一行一列視圖
	public ImageView iv_item_icon_single;
	public TextView tv_item_single;
	
	public MyRecycleAdapterHolder(View itemView) {
		super(itemView);
	}
	public MyRecycleAdapterHolder(View itemView,int viewType) {
		super(itemView);
		initView(itemView,viewType);
	}
	private void initView(View itemView, int viewType) {
		if(viewType == RecycleViewWithHead.RECYCLER_VIEW_ITEM_DOUBLE){
			iv_item_icon = (ImageView) itemView.findViewById(R.id.iv_item_icon);
			tv_item = (TextView) itemView.findViewById(R.id.tv_item);
		}else if(viewType == RecycleViewWithHead.RECYCLER_VIEW_ITEM_SINGLE){
			iv_item_icon_single = (ImageView) itemView.findViewById(R.id.iv_item_icon_single);
			tv_item_single = (TextView) itemView.findViewById(R.id.tv_item_single);
		}
	}
}

頭布局文件head.xm沒有不論什么變化

條目的布局拆分為2個item_double.xml和item_single.xml

item_double.xml和之前的item.xml一樣。

item_single.xml

<?
xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/ll_list"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="2dp"
    android:layout_marginRight="2dp"
    android:layout_marginTop="5dp"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/iv_item_icon_single"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/item" />

    <TextView
        android:id="@+id/tv_item_single"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:layout_marginTop="5dp"
        android:text="這是一僅僅熊貓" />

</LinearLayout>

源代碼地址：http://download.csdn.net/detail/linder_qzy/9491370