RecyclerView实现横向滚动

Fruit Class

public class Fruit {
private int fruitImageId; //图片的ID
private String fruitName; //水果名字

public Fruit(String fruitName,int fruitImageId) { //构造函数进行初始化 ,用于创建新的对象的value
this.fruitImageId = fruitImageId;
this.fruitName = fruitName;
}

public int getFruitImageId() {  //获得对象(水果)ID(例如R.id.fruitID)
return fruitImageId;
}

public String getFruitName() { //获得对象的名字(字符串类型)
return fruitName;
}
}

FruitAdapter Class

public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder>{
 

List<Fruit> mfruitList;

public FruitAdapter(List<Fruit> mfruitList) { //对水果列表集合进行初始化 , 构造函数
this.mfruitList = mfruitList; //把要展示的数据源传进来,并赋值给mfruitList,后续的工作都基于这个数据源
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { //创建HoldView的实例,并把实例返回
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.fruit,parent,false); //将fruit的布局加载进来
ViewHolder holder = new ViewHolder(view);
return holder;
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
Fruit fruit = mfruitList.get(position); //通过positon,获得当前对象Fruit的实例
holder.fruitImage.setImageResource(fruit.getFruitImageId()); //设置实例的图片
holder.fruitName.setText(fruit.getFruitName()); //设置实例的名字
}

@Override
public int getItemCount() {
return mfruitList.size();//获得对象的数量,返回数据源的长度.
}

static class ViewHolder extends RecyclerView.ViewHolder {

ImageView fruitImage;
TextView fruitName;
public ViewHolder(View View) { //view是RecyclerView子项的最外层布局,通过view findViewById()方法,

//就能找到外层的fruit_image和fruit_name的id
super(View);
fruitImage = (ImageView) View.findViewById(R.id.fruit_image);
fruitName = (TextView) View.findViewById(R.id.fruit_name);
}
}

}

MainActivity Class

public class MainActivity extends AppCompatActivity {

List<Fruit> fruitlist = new ArrayList<Fruit>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initFruits(); //初始化水果数据
RecyclerView recyclerView = (RecyclerView) findViewById(recycler_view);
LinearLayoutManager layoutManager = new LinearLayoutManager(this); //线性布局的意思,实现ListView功能

layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL ); //设置布局横向排列

recyclerView.setLayoutManager(layoutManager); //layoutmanager用于指定recyclerview的布局方式 FruitAdapter adapter = new FruitAdapter(fruitlist);//将水果的数据传入到FruitAdapter中 recyclerView.setAdapter(adapter); //完成适配器设置,建立关联 } void initFruits(){ for(int i=0;i<2;i++){ Fruit apple = new Fruit("Apple",R.drawable.apple); fruitlist.add(apple); Fruit banana = new Fruit("Banana",R.drawable.banana); fruitlist.add(banana); Fruit cherry = new Fruit("Cherry",R.drawable.cherry); fruitlist.add(cherry); Fruit grape = new Fruit("Grape",R.drawable.grape); fruitlist.add(grape); Fruit mango = new Fruit("Mango",R.drawable.mango); fruitlist.add(mango); Fruit orange = new Fruit("Orange",R.drawable.orange); fruitlist.add(orange); Fruit pear = new Fruit("Pear",R.drawable.pear); fruitlist.add(pear); Fruit pineapple = new Fruit("Pineapple",R.drawable.pineapple); fruitlist.add(pineapple); Fruit strawberry = new Fruit("Strawberry",R.drawable.strawberry); fruitlist.add(strawberry); Fruit watermelon = new Fruit("Watermelon",R.drawable.watermelon); fruitlist.add(watermelon); } }}

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

</android.support.v7.widget.RecyclerView>
</LinearLayout>

fruit.xml 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="100dp" //让每个水果的文字所占的空间一样大,美观
android:layout_height="wrap_content"
android:orientation="vertical" //改成垂直方向排列
>
<ImageView
android:id="@+id/fruit_image"
android:src="@drawable/apple"
android:layout_gravity="center_horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/fruit_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="苹果"
android:layout_gravity="center_horizontal"
android:layout_marginTop="10dp"
android:textColor="#000" />

</LinearLayout>