Android RecyclerView横向滑动 Android RecyclerView横向滑动

Android RecyclerView横向滑动

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android.support.v7.widget.RecyclerView

功能：RecyclerView横向滑动

控件：<android.support.v7.widget.RecyclerView />

Java类：RecyclerView、GalleryAdapter、List<Integer>

1、主界面布局

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
3.     xmlns:tools="http://schemas.android.com/tools"  
4.     android:layout_width="match_parent"  
5.     android:layout_height="match_parent"  
6.     android:paddingBottom="@dimen/activity_vertical_margin"  
7.     android:paddingLeft="@dimen/activity_horizontal_margin"  
8.     android:paddingRight="@dimen/activity_horizontal_margin"  
9.     android:paddingTop="@dimen/activity_vertical_margin"  
10.     tools:context="com.info.activity.RecyclerActivity">  
11.   
12.       
13.     <android.support.v7.widget.RecyclerView  
14.         android:id="@+id/id_recyclerview_horizontal"  
15.         android:layout_width="match_parent"  
16.         android:layout_height="120dp"  
17.         android:layout_centerVertical="true"  
18.         android:background="#FF0000"  
19.         android:scrollbars="none"  
20.         ></android.support.v7.widget.RecyclerView>  
21.       
22. </RelativeLayout>  

2、子界面布局

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
3.     android:layout_width="120dp"  
4.     android:layout_height="120dp">  
5.   
6.     <ImageView  
7.         android:id="@+id/id_index_gallery_item_image"  
8.         android:layout_width="80dp"  
9.         android:layout_height="80dp"  
10.         android:layout_alignParentTop="true"  
11.         android:layout_centerHorizontal="true"  
12.         android:layout_margin="5dp"  
13.         android:scaleType="centerCrop" />  
14.   
15.     <TextView  
16.         android:id="@+id/id_index_gallery_item_text"  
17.         android:layout_width="wrap_content"  
18.         android:layout_height="wrap_content"  
19.         android:layout_below="@id/id_index_gallery_item_image"  
20.         android:layout_centerHorizontal="true"  
21.         android:layout_marginBottom="5dp"  
22.         android:layout_marginTop="5dp"  
23.         android:textColor="#000000"  
24.         android:text="some info"  
25.         android:textSize="12dp" />  
26. </RelativeLayout>  

3、Java代码

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1. package com.info.activity;  
2.   
3. import android.app.Activity;  
4. import android.content.Context;  
5. import android.support.v7.app.AppCompatActivity;  
6. import android.os.Bundle;  
7. import android.support.v7.widget.LinearLayoutManager;  
8. import android.support.v7.widget.RecyclerView;  
9. import android.view.LayoutInflater;  
10. import android.view.View;  
11. import android.view.ViewGroup;  
12. import android.widget.ImageView;  
13. import android.widget.TextView;  
14.   
15. import java.util.ArrayList;  
16. import java.util.Arrays;  
17. import java.util.List;  
18.   
19. public class RecyclerActivity extends Activity {  
20.   
21.     private RecyclerView mRecyclerView;  
22.     private GalleryAdapter mAdapter;  
23.     private List<Integer> mDatas;  
24.   
25.   
26.     @Override  
27.     protected void onCreate(Bundle savedInstanceState) {  
28.         super.onCreate(savedInstanceState);  
29.         setContentView(R.layout.activity_recycler);  
30.   
31.         initDatas();  
32.         //得到控件  
33.         mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview_horizontal);  
34.         //设置布局管理器  
35.         LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);  
36.         linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);  
37.         mRecyclerView.setLayoutManager(linearLayoutManager);  
38.         //设置适配器  
39.         mAdapter = new GalleryAdapter(this, mDatas);  
40.         mRecyclerView.setAdapter(mAdapter);  
41.     }  
42.   
43.     private void initDatas()  
44.     {  
45.         mDatas = new ArrayList<>(Arrays.asList(R.drawable.ic_launcher,  
46.                 R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,  
47.                 R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher));  
48.     }  
49.   
50.     public class GalleryAdapter extends  
51.             RecyclerView.Adapter<GalleryAdapter.ViewHolder>  
52.     {  
53.         private LayoutInflater mInflater;  
54.         private List<Integer> mDatas;  
55.   
56.         public GalleryAdapter(Context context, List<Integer> datats)  
57.         {  
58.             mInflater = LayoutInflater.from(context);  
59.             mDatas = datats;  
60.         }  
61.   
62.         public class ViewHolder extends RecyclerView.ViewHolder  
63.         {  
64.             public ViewHolder(View arg0)  
65.             {  
66.                 super(arg0);  
67.             }  
68.   
69.             ImageView mImg;  
70.             TextView mTxt;  
71.         }  
72.   
73.         @Override  
74.         public int getItemCount()  
75.         {  
76.             return mDatas.size();  
77.         }  
78.   
79.         /** 
80.          * 创建ViewHolder 
81.          */  
82.         @Override  
83.         public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i)  
84.         {  
85.             View view = mInflater.inflate(R.layout.activity_recycler_item,  
86.                     viewGroup, false);  
87.             ViewHolder viewHolder = new ViewHolder(view);  
88.   
89.             viewHolder.mImg = (ImageView) view  
90.                     .findViewById(R.id.id_index_gallery_item_image);  
91.             return viewHolder;  
92.         }  
93.   
94.         /** 
95.          * 设置值 
96.          */  
97.         @Override  
98.         public void onBindViewHolder(final ViewHolder viewHolder, final int i)  
99.         {  
100.             viewHolder.mImg.setImageResource(mDatas.get(i));  
101.         }  
102.   
103.     }  
104. }