用的死資料包含了增加刪除

先佈局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="80dp"
        android:orientation="horizontal">

        <Button
            android:layout_weight="1"
            android:layout_width="80dp"
            android:layout_height="50dp"
            android:id="@+id/add"
            android:text="add"/>
        <Button
            android:layout_weight="1"
            android:layout_width="80dp"
            android:layout_height="50dp"
            android:id="@+id/delete"
            android:text="delete"/>
        <Button
            android:layout_weight="1"
            android:layout_width="80dp"
            android:layout_height="50dp"
            android:id="@+id/listview"
            android:text="listview"/>
        <Button
            android:layout_weight="1"
            android:layout_width="80dp"
            android:layout_height="50dp"
            android:id="@+id/gridview"
            android:text="gridview"/>
        <Button
            android:layout_weight="1"
            android:layout_width="80dp"
            android:layout_height="50dp"
            android:id="@+id/fo"
            android:text="flo"/>

    </LinearLayout>

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


</LinearLayout>
 

item條目的佈局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#d7d7d0"
    >

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/ic_launcher"
        android:id="@+id/image"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textview"/>

</LinearLayout>
 

MainActivity程式碼，，有點小bug

package likuo.bwie.com.day13;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.OrientationHelper;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

import likuo.bwie.com.day13.adapter.MyAdapter;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private RecyclerView recycler;
    List<String> mList = new ArrayList<>();
    private Button add;
    private Button delete;
    private Button listview;
    private Button gridview;
    private Button fo;
    MyAdapter myAdapter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        myAdapter = new MyAdapter(this, mList);
        recycler.setAdapter(myAdapter);
        recycler.setLayoutManager(new LinearLayoutManager(this, OrientationHelper.VERTICAL, false));
        myAdapter.setScrolla(new MyAdapter.scrolla() {
            @Override
            public void success(View view, int i) {
                Toast.makeText(MainActivity.this, myAdapter.mList.get(i), Toast.LENGTH_SHORT).show();
            }
        });
    }



    private void initView() {
        recycler = findViewById(R.id.recycler);
        for (int i = 0; i < 100; i++) {
            mList.add("趙豪軒" + i + "號");
        }
        add = findViewById(R.id.add);
        add.setOnClickListener(this);
        delete = findViewById(R.id.delete);
        delete.setOnClickListener(this);
        listview = findViewById(R.id.listview);
        listview.setOnClickListener(this);
        gridview = findViewById(R.id.gridview);
        gridview.setOnClickListener(this);
        fo = findViewById(R.id.fo);
        fo.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.add:
                myAdapter.addData(0,"趙豪軒"+mList.size()+"號");
                recycler.scrollToPosition(0);
                break;
            case R.id.delete:
                myAdapter.removeData(0);
                recycler.scrollToPosition(0);
                break;
            case R.id.listview:
                LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, OrientationHelper.VERTICAL, false);
                recycler.setLayoutManager(linearLayoutManager);
                break;
            case R.id.gridview:
                GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 2);
                recycler.setLayoutManager(gridLayoutManager);
                break;
            case R.id.fo:
                StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(5, OrientationHelper.VERTICAL);
                recycler.setLayoutManager(staggeredGridLayoutManager);
                break;
        }
    }
}

 

MyAdapter的程式碼：

package likuo.bwie.com.day13.adapter;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.List;
import likuo.bwie.com.day13.R;

/**
 * date:2018/11/14
 * author:李闊(淡意襯優柔)
 * function:
 */
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.VH> {
    Context context;
    public List<String> mList;


    public MyAdapter(Context context, List<String> list) {
        this.context = context;
        this.mList = list;
    }

    public static class VH extends RecyclerView.ViewHolder{
        TextView textView;
        public VH(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.textview);
        }
    }




    @NonNull
    @Override
    public VH onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = View.inflate(context,R.layout.item,null);
        VH mVH = new VH(view);
        return mVH;
    }

    @Override
    public void onBindViewHolder(@NonNull VH vh, final int i) {
        String s = mList.get(i);
        vh.textView.setText(s);
        /*vh.textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

            }
        });*/
        vh.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mScrolla.success(v,i);
            }
        });
    }

    @Override
    public int getItemCount() {
        return mList.size();
    }



    public interface scrolla{
        void success(View view,int i);
    }
    private scrolla mScrolla;

    public void setScrolla(scrolla scrolla) {
        mScrolla = scrolla;
    }

//增加
    public void addData(int position,String ha) {
        mList.add(position,ha);
        notifyItemInserted(0);
    }
//刪除
    public void removeData(int position) {
        mList.remove(0);
        notifyItemRemoved(0);
    }
}