1.新建一个工程，点击设置，找到dependencies,导入RecyclerVeiw
2.编写布局文件：
2.1 这个为recycler整体的布局
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerview_layout1"
android:layout_width="match_parent"
android:layout_height="150dp">
</android.support.v7.widget.RecyclerView>
2.2 这个为recycler每一个item的布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center"
>
android:id="@+id/recyclerviewimg1"
android:layout_width="100dp"
android:layout_height="70dp"
android:src="@drawable/fruit1"
android:scaleType="fitXY"
/>
android:id="@+id/recyclerviewtext_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="水果" />
</LinearLayout>
3.初始化数据，这个方法为集合填充数据得方法，其中getRandomNumber为得到一个随机的数据
public void initrecyclergrid(){
for(int i=0;i<5;i++){
Fruit fruit1 =new Fruit(getRandomNumber("111"),R.drawable.fruit1);
mFruits2.add(fruit1);
Fruit fruit2 =new Fruit(getRandomNumber("222"),R.drawable.fruit2);
mFruits2.add(fruit2);
Fruit fruit3 =new Fruit(getRandomNumber("333"),R.drawable.fruit3);
mFruits2.add(fruit3);
Fruit fruit4 =new Fruit(getRandomNumber("444"),R.drawable.fruit4);
mFruits2.add(fruit4);
Fruit fruit5 =new Fruit(getRandomNumber("555"),R.drawable.fruit5);
mFruits2.add(fruit5);
Fruit fruit6 =new Fruit(getRandomNumber("666"),R.drawable.fruit6);
mFruits2.add(fruit6);
Fruit fruit7 =new Fruit(getRandomNumber("777"),R.drawable.fruit7);
mFruits2.add(fruit7);
}
}
public Stringget RandomNumber(String name){
Random random =new Random();
int length = random.nextInt(20)+1;
StringBuilder builder =new StringBuilder();
for(int i=0;i
builder.append(name);
}
return builder.toString();
}
4.建立Recyclerview的适配器
public class RecyclerviewAdapter2 extends RecyclerView.Adapter{
/**
* 1.
* 传入上下文对象是因为有弹出提示
* 集合即为列表要显示的数据
*/
private ListmFruits =new ArrayList<>();
private ContextmContext;
public RecyclerviewAdapter2(Context context, List list) {
this.mContext = context;
this.mFruits = list;
}
/**
* 2. 创建ViewHolder 继承自RecyclerView.ViewHolder，用来优化列表的显示，
*
* @param viewGroup
* @param i
* @return
*
* 加载item布局，为布局中的元素设置监听
*
*/
@NonNull
@Override
public ViewHolderonCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
// 加载 item 的布局，将其传递给ViewHolder，优化列表，减少加载item和找到对应布局id时间，实现复用
View view = LayoutInflater.from(mContext).inflate(R.layout.recycler_gridviewitem,viewGroup,false);
final ViewHolder holder =new ViewHolder(view);
//为
holder.mView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int position =holder.getAdapterPosition();
Toast.makeText(view.getContext(),"你点击了"+mFruits.get(position).getThing(),Toast.LENGTH_SHORT).show();
}
});
holder.mImageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int position =holder.getAdapterPosition();
Toast.makeText(view.getContext(),"你点击了图片"+mFruits.get(position).getThing(),Toast.LENGTH_SHORT).show();
}
});
return holder;
}
/**
* 3.
* @param viewHolder
* @param i
*
* 为将数据赋值给item
*/
@Override
public void onBindViewHolder(@NonNull ViewHolder viewHolder, int i) {
Fruit fruit =mFruits.get(i);
viewHolder.mImageView.setImageResource(fruit.getIcon());
viewHolder.tv_1.setText(fruit.getThing());
}
// 返回集合的大小
@Override
public int getItemCount() {
return mFruits.size();
}
/**
* 创建ViewHolder 用来优化布局
*/
class ViewHolderextends RecyclerView.ViewHolder{
ViewmView;
ImageViewmImageView;
TextViewtv_1;
public ViewHolder(@NonNull View itemView) {
super(itemView);
mView = itemView;
mImageView = itemView.findViewById(R.id.recyclerviewimg1);
tv_1 = itemView.findViewById(R.id.recyclerviewtext_1);
}
}
}
5.为RecyclerView设置适配器
public class RecyclerviewActivityextends AppCompatActivity {
private ListmFruits =new ArrayList<>();
private ListmFruits2 =new ArrayList<>();
private RecyclerViewmRecyclerView,recyclerview_layout1,recyclerview_layout2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recyclerview);
initFruits();
initrecyclergrid();
mRecyclerView = findViewById(R.id.recyclerview_layout);
recyclerview_layout1 = findViewById(R.id.recyclerview_layout1);
recyclerview_layout2 = findViewById(R.id.recyclerview_layout2);
LinearLayoutManager layoutManager =new LinearLayoutManager(this);
layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
// 上一行代码设为水平的
mRecyclerView.setLayoutManager(layoutManager);
// 设置recyclerview为九宫格显示，其中 3 表示为3列
GridLayoutManager gridLayoutManager =new GridLayoutManager(this,3);
recyclerview_layout1.setLayoutManager(gridLayoutManager);
// 设置recyclerview的显示为瀑布流形式
StaggeredGridLayoutManager staggeredGridLayoutManager =new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
recyclerview_layout2.setLayoutManager(staggeredGridLayoutManager);
// 设置设配器
RecyclerviewAdapter adapter =new RecyclerviewAdapter(RecyclerviewActivity.this,mFruits);
mRecyclerView.setAdapter(adapter);
recyclerview_layout1.setAdapter(adapter);
recyclerview_layout2.setAdapter(adapter);
}
注：
其中recyclerView显示形式的不同，主要是LayoutManager（布局管理器）的不同，由于截图工具不方便编辑，文章主要用于自己的笔记，有不明白的欢迎留言
