android RecycleView复杂多条目的布局

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android RecycleView复杂多条目的布局

2024-11-02 20:17:39 204人阅读

用RecycleView来实现布局形式。默认仅仅能指定一种布局格式。可是实际中我们的布局常常会用到多种类型的布局方式。怎样实现呢？

今天来说下经常使用的2钟方式。

第一种：

通过自己定义addHeadView方法来加入头布局

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;
	// 当前的条目是recyclerView的头布局
	public static final int HEADER_RECYCLER_VIEW_ITEM = 0;
	// 当前的条目是普通recyclerView的条目
	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);
		// 设置布局管理
		GridLayoutManager manager = new GridLayoutManager(this, 2);
		// 设置布局管理一条数据占用几行，假设是头布局则头布局自己占用一行
		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>

头布局文件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=http://www.mamicode.com/"@drawable/head" />>


适配器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;
	}

	/**
	 * 设置数据源总的条目
	 */
	@Override
	public int getItemCount() {
		//返回条目数加头布局个数
		return count + 1;
	}

	@Override
	public void onBindViewHolder(MyRecycleAdapterHolder holder,
			final int position) {
		int itemViewType = getItemViewType(position);
		// 头部
		if (itemViewType == RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM) {
			return;
		} else if (itemViewType == RecycleViewWithHead.NORMAL_RECYCLER_VIEW_ITEM) {//普通条目
			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);
	}

	/**
	 * 加入自己定义头部
	 */
	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;
		}
	}
}

普通条目的布局文件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=http://www.mamicode.com/"@drawable/item" />>


普通条目的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);
	}

}

效果图:



另一种情况类似于淘宝的商品展示我们能够切换每行显示的数量，事实上也非常easy
先看下要实现的效果：

我先说下大致的实现思路：
1.给adapter设置一个当前显示多行还是单行的标记。
2.每次切换视图时重置标记。并重置RecycleView的LayoutManager。
3.调用adapter.notifyItemRangeChanged(2, adapter.getItemCount());（第一个參数是动画開始的位置索引）
好了再来看下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;
	// 当前的条目是recyclerView的头布局
	public static final int HEADER_RECYCLER_VIEW_ITEM = 0;
	// 当前的条目是普通recyclerView的条目
	public static final int NORMAL_RECYCLER_VIEW_ITEM = 1;
	// 一行显示一个
	public static final int RECYCLER_VIEW_ITEM_SINGLE = 3;
	// 一行显示两个
	public static final int RECYCLER_VIEW_ITEM_DOUBLE = 4;
	private ImageView iv_switch;// 视图转换
	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);
		// 设置布局管理一条数据占用几行，假设是头布局则头布局自己占用一行
		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);
		// 设置当前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;
		}

	}

	/**
	 * 改变RecycleView的显示列数
	 */
	private void changeRecycleViewList() {
		if (adapter != null) {
			int spanSize = adapter.getSpanSize();
			// 当前一行显示一列
			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);
			}
			// 当前一行显示两列
			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);
			}
			// 第一个參数是动画開始的位置索引
			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=http://www.mamicode.com/"@drawable/more">

适配器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;// 当前每行显示几列

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

	/**
	 * 设置数据源总的条目
	 */
	@Override
	public int getItemCount() {
		// 返回条目数加头布局个数
		return count + 1;
	}

	@Override
	public void onBindViewHolder(MyRecycleAdapterHolder holder,
			final int position) {
		int itemViewType = getItemViewType(position);
		// 头部
		if (itemViewType == RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM) {
			return;
		} else {// 普通条目
			if (itemViewType == RecycleViewWithHead.RECYCLER_VIEW_ITEM_DOUBLE) {// 一行两列视图
				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) {// 一行一列视图
				holder.iv_item_icon_single.setOnClickListener(new OnClickListener() {
					@Override
					public void onClick(View v) {
						Toast.makeText(mContext,"单列，" + (position - 1) + "", 0).show();
					}
				});
			}
		}
	}

	@Override
	public MyRecycleAdapterHolder onCreateViewHolder(ViewGroup parent,
			int viewType) {
		View root = null;
		// 头部
		if (viewType == RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM) {
			root = headView;
		} else {// 普通条目
			/** 一行显示一条 */
			if (viewType == RecycleViewWithHead.RECYCLER_VIEW_ITEM_SINGLE) {
				root = LayoutInflater.from(mContext).inflate(R.layout.item_single, parent, false);
			}
			/** 一行显示两条 */
			else {
				root = LayoutInflater.from(mContext).inflate(R.layout.item_double, parent, false);
			}
		}
		return new MyRecycleAdapterHolder(root, viewType);
	}

	/**
	 * 加入自己定义头部
	 */
	public void addHeadView(View view) {
		this.headView = view;
	}

	@Override
	public int getItemViewType(int position) {

		if (position == 0) {
			return RecycleViewWithHead.HEADER_RECYCLER_VIEW_ITEM;
		} else {
			/** 一行显示一条 */
			if (spanSize == RecycleViewWithHead.RECYCLER_VIEW_ITEM_SINGLE) {
				return RecycleViewWithHead.RECYCLER_VIEW_ITEM_SINGLE;
				/** 一行显示两条 */
			} else {
				return RecycleViewWithHead.RECYCLER_VIEW_ITEM_DOUBLE;
			}
		}
	}

	public int getSpanSize() {
		return spanSize;
	}

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


普通条目的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{
	//一行两列视图
	public ImageView iv_item_icon;
	public TextView tv_item;
	
	//一行一列视图
	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);
		}
	}
}

头布局文件head.xm没有不论什么变化条目的布局拆分为2个item_double.xml和item_single.xml
item_double.xml和之前的item.xml一样。

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=http://www.mamicode.com/"@drawable/item" />>

源代码地址：http://download.csdn.net/detail/linder_qzy/9491370

android RecycleView复杂多条目的布局

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android RecycleView复杂多条目的布局

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