RecycleView多Item布局

用RecycleView来实现布局形式，默认只能指定一种布局格式，但是实际中我们的布局经常会用到多种类型的布局方式。如何实现呢？

今天来说下常用的2钟方式。

第一种：

通过自定义addHeadView方法来添加头布局

RecycleViewWithHead.Java

[java] view
plain copy

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，如果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

[html] view
plain copy

<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

[html] view
plain copy

<?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="这是一张熊猫的图片" />

<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>

适配器MyRecycleAdapter.java

[java] view
plain copy

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);

}

/**

* 添加自定义头部

*/

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

[html] view
plain copy

<?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="这是一只熊猫" />

</LinearLayout>

普通条目的ViewHolder

[java] view
plain copy

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:



还有一种情况类似于淘宝的商品展示我们可以切换每行显示的数量，其实也很简单

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());（第一个参数是动画开始的位置索引）

好了再来看下RecycleViewWithHead.java

[java] view
plain copy

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，如果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);

}

// 第一个参数是动画开始的位置索引

adapter.notifyItemRangeChanged(2, adapter.getItemCount());

}

}

}

布局文件activity_recycle.xml

[html] view
plain copy

<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>

适配器MyRecycleAdapter.java

[java] view
plain copy

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);

}

/**

* 添加自定义头部

*/

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

[java] view
plain copy

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没有任何变化

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

[html] view
plain copy

<?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="这是一只熊猫" />

</LinearLayout>

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