这次学习的内容是使用RecyclerView来实现一些较为复杂的布局，比如一个item：

最左边是一个imageview，中间部分为textView，textView下面又是一个textView，最右边为一个imageview。

1、首先在activity_main.xml中添加RecyclerView，随后正如之前所说的分别针对左中右新建3个XML布局文件命名为item_type_one、two、three.随后对其进行布局配置。

2、新建一个adapter添加模拟数据。然后针对布局新建三个viewholder。随后新建一个抽象类TypeAbstractViewHolder，将三个viewholder用到的同一个方法封装起来调用,将三个viewHolder继承自抽象类。为了优雅。

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.tony.recyclerviewdemo.MainActivity"> <android.support.v7.widget.RecyclerView android:id="@+id/recycleView" android:layout_width="match_parent" android:layout_height="match_parent"> </android.support.v7.widget.RecyclerView></RelativeLayout>

item_type_one.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="60dp" xmlns:tools="http://schemas.android.com/tools" android:background="@android:color/white" android:gravity="center_vertical" android:orientation="horizontal"> <ImageView android:id="@+id/avatar" android:layout_width="40dp" android:layout_height="40dp" android:layout_marginLeft="20dp" /> <TextView tools:text = "月满轩尼诗" android:id="@+id/name" android:layout_marginLeft="20dp" android:layout_width="wrap_content" android:layout_height="wrap_content" /></LinearLayout>

item_type_two.xml:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="60dp" android:background="@android:color/white" android:gravity="center_vertical" android:orientation="horizontal"> <ImageView android:id="@+id/avatar" android:layout_width="40dp" android:layout_height="40dp" android:layout_marginLeft="20dp" /> <LinearLayout android:layout_marginLeft="20dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:id="@+id/name" android:layout_width="wrap_content" android:layout_height="wrap_content" tools:text="月满轩尼诗" /> <TextView android:id="@+id/content" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="5dp" tools:text="月满轩尼诗是一部好电影吗？" /> </LinearLayout></LinearLayout>

item_type_three.xml:

<?xml version="1.0" encoding="utf-8"?><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="60dp" android:background="@android:color/white" android:gravity="center_vertical" android:orientation="horizontal"> <ImageView android:id="@+id/avatar" android:layout_width="40dp" android:layout_height="40dp" android:layout_centerVertical="true" android:layout_marginLeft="20dp" /> <ImageView android:id="@+id/contentImage" android:layout_width="100dp" android:layout_height="60dp" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginLeft="20dp" android:layout_marginRight="20dp" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="20dp" android:orientation="vertical" android:layout_centerVertical="true" android:layout_toRightOf="@+id/avatar" android:layout_toEndOf="@+id/avatar" android:layout_marginStart="20dp"> <TextView android:id="@+id/name" android:layout_width="wrap_content" android:layout_height="wrap_content" tools:text="月满轩尼诗" /> <TextView android:id="@+id/content" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="5dp" tools:text="月满轩尼诗是一部好电影吗？" /> </LinearLayout></RelativeLayout>

这边提一个小技巧，一般textview如果不设置文本内容的话是无法预览的，这里我们在属性中添加一个：tools:text=”abc”;
这个时候abc就会在UI上面显示出来了，而且abc也不用加入string.xml.

Java文件：

MAinActivity.class

package com.example.tony.recyclerviewdemo;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity { private RecyclerView mRecyclerView; private DemoAdapter mAdapter; int colors[] = {android.R.color.holo_blue_light, android.R.color.holo_orange_light, android.R.color.holo_red_light}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mRecyclerView = (RecyclerView) findViewById(R.id.recycleView); mRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)); mAdapter = new DemoAdapter(this); mRecyclerView.setAdapter(mAdapter); initData(); } private void initData() { List<DataModel> list = new ArrayList<>(); for (int i = 0; i < 20; i++) { int type = (int) (Math.random() * 3 + 1); DataModel data = new DataModel(); data.avatarColor = colors[type - 1]; data.type = type; data.name = "Name: " + i; data.content = "Content: " + i; data.contentColor = colors[(type + 1) % 3]; list.add(data); } mAdapter.addList(list); mAdapter.notifyDataSetChanged(); }}

DemoAdapter.class

package com.example.tony.recyclerviewdemo;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.ViewGroup;import java.util.ArrayList;import java.util.List;/* * Created by Tony on 2016/12/3. */public class DemoAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{ private LayoutInflater mLayoutInflater; private List<DataModel> mList = new ArrayList<>(); public DemoAdapter(Context context) { mLayoutInflater = LayoutInflater.from(context); } public void addList(List<DataModel> list) { mList.addAll(list); } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { switch (viewType) { case DataModel.TYPE_ONE: return new TypeOneViewHolder(mLayoutInflater.inflate(R.layout.item_type_one, parent, false)); case DataModel.TYPE_TWO: return new TypeTwoViewHolder(mLayoutInflater.inflate(R.layout.item_type_two, parent, false)); case DataModel.TYPE_THREE: return new TypeThreeViewHolder(mLayoutInflater.inflate(R.layout.item_type_three, parent, false)); } return null; } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { ((TypeAbstractViewHolder) holder).bindHolder(mList.get(position)); } @Override public int getItemViewType(int position) { return mList.get(position).type; } @Override public int getItemCount() { return mList.size(); }}

DataModel.class

package com.example.tony.recyclerviewdemo;/** * Created by Tony on 2016/12/3. */public class DataModel { public static final int TYPE_ONE = 1; public static final int TYPE_TWO = 2; public static final int TYPE_THREE = 3; public int type; public int avatarColor; public String name; public String content; public int contentColor;}

TypeAbstractViewHolder.class

package com.example.tony.recyclerviewdemo;import android.support.v7.widget.RecyclerView;import android.view.View;/** * Created by Tony on 2016/12/3. */public abstract class TypeAbstractViewHolder extends RecyclerView.ViewHolder{ public TypeAbstractViewHolder(View itemView) { super(itemView); } public abstract void bindHolder(DataModel model);}

TypeOneViewHolder.class

package com.example.tony.recyclerviewdemo;import android.view.View;import android.widget.ImageView;import android.widget.TextView;/** * Created by Tony on 2016/12/3. */public class TypeOneViewHolder extends TypeAbstractViewHolder { private ImageView avatar; private TextView name; public TypeOneViewHolder(View itemView) { super(itemView); avatar = (ImageView) itemView.findViewById(R.id.avatar); name = (TextView) itemView.findViewById(R.id.name); } //ViewHolder数据和外面数据绑定起来 @Override public void bindHolder(DataModel model) { avatar.setBackgroundResource(model.avatarColor); name.setText(model.name); }}

TypeTwoViewHolder.class

package com.example.tony.recyclerviewdemo;import android.support.v7.widget.RecyclerView;import android.view.View;import android.widget.ImageView;import android.widget.TextView;/** * Created by Tony on 2016/12/3. */public class TypeTwoViewHolder extends TypeAbstractViewHolder { private ImageView avatar; private TextView name; private TextView content; public TypeTwoViewHolder(View itemView) { super(itemView); avatar = (ImageView) itemView.findViewById(R.id.avatar); name = (TextView) itemView.findViewById(R.id.name); content = (TextView) itemView.findViewById(R.id.content); } //ViewHolder数据和外面数据绑定起来 @Override public void bindHolder(DataModel model) { avatar.setBackgroundResource(model.avatarColor); name.setText(model.name); content.setText(model.content); }}

TypeThreeViewHolder.class

package com.example.tony.recyclerviewdemo;import android.view.View;import android.widget.ImageView;import android.widget.TextView;/** * Created by Tony on 2016/12/3. */public class TypeThreeViewHolder extends TypeAbstractViewHolder { private ImageView avatar; private TextView name; private TextView content; private ImageView contentImage; public TypeThreeViewHolder(View itemView) { super(itemView); avatar = (ImageView) itemView.findViewById(R.id.avatar); contentImage = (ImageView) itemView.findViewById(R.id.contentImage); name = (TextView) itemView.findViewById(R.id.name); content = (TextView) itemView.findViewById(R.id.content); } //ViewHolder数据和外面数据绑定起来 @Override public void bindHolder(DataModel model) { avatar.setBackgroundResource(model.avatarColor); name.setText(model.name); contentImage.setBackgroundResource(model.contentColor); content.setText(model.content); }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。