第九周总结

Posted 2021-10-30 smartisn

所花时间：五天

代码行：2000

博客量：六篇

了解到知识点 ：

android Studio这个编程软件，十分好用，同时有一些相关便利代码： 

 

 1 package com.example.a13313.helloworld.recyclerview;
 2 
 3 import android.content.Context;
 4 import android.support.annotation.NonNull;
 5 import android.support.v7.widget.RecyclerView;
 6 import android.view.LayoutInflater;
 7 import android.view.View;
 8 import android.view.ViewGroup;
 9 import android.widget.TextView;
10 
11 import com.example.a13313.helloworld.R;
12 
13 /**
14  * Created by 13313 on 2019/4/21.
15  */
16 public class GridAdapter extends RecyclerView.Adapter<GridAdapter.LinearViewHolder> {
17     private Context mContext;
18     private OnItemClickListener mlistener;  //分配空间
19     //private List<String> list;
20     public GridAdapter(Context context, OnItemClickListener listener){
21         this.mContext=context;             //内容
22         this.mlistener=listener;          //传输位置
23     }
24     @NonNull
25     @Override
26     public GridAdapter.LinearViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
27         return new LinearViewHolder(LayoutInflater.from(mContext).inflate(R.layout.layout_grid_recyclerview_item,viewGroup,false));
28     }
29 
30     @Override
31     public void onBindViewHolder(@NonNull GridAdapter.LinearViewHolder viewHolder, final int i) {
32         viewHolder.textView.setText("Hello");  //内容
33         viewHolder.itemView.setOnClickListener(new View.OnClickListener() {  //监听器按键
34             @Override
35             public void onClick(View v) {
36                 mlistener.onClick(i);       //监听器
37             }
38         });
39     }
40 
41     @Override
42     public int getItemCount() {
43         return 80;
44     }
45     class LinearViewHolder extends RecyclerView.ViewHolder{
46         public TextView textView;
47         public LinearViewHolder(@NonNull View itemView) {
48             super(itemView);
49             textView=itemView.findViewById(R.id.tv_title);
50         }
51     }
52     public interface OnItemClickListener{  //字节型监听器
53         void onClick(int pos);
54 
55     }
56 }

package com.example.a13313.helloworld.recyclerview;

import android.graphics.Rect;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Toast;

import com.example.a13313.helloworld.R;

public class HoRecyclerViewActivity extends AppCompatActivity {
        private RecyclerView mRvHor;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ho_recycler_view);
        mRvHor=(RecyclerView) findViewById(R.id.rv_hor);
        LinearLayoutManager linearLayoutManager=new LinearLayoutManager(HoRecyclerViewActivity.this);
        linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
        mRvHor.setLayoutManager(linearLayoutManager);
        mRvHor.addItemDecoration(new MyDecoration());
        mRvHor.setAdapter(new HorAdapter(HoRecyclerViewActivity.this, new HorAdapter.OnItemClickListener() {
            @Override
            public void onClick(int pos) {
                Toast.makeText(HoRecyclerViewActivity.this,"click"+pos,Toast.LENGTH_LONG).show();   //监听器
            }
        }));
    }
    class MyDecoration extends RecyclerView.ItemDecoration
    {
        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state)
        {
            super.getItemOffsets(outRect,view,parent,state);
            outRect.set(0,0,getResources().getDimensionPixelOffset(R.dimen.dividerHeight),0);
        }
    }
}