Android之RecycleView（1)

build.gradle引入包,compile ‘com.android.support:design:25.3.1’

---

RecycleActivity以及布局文件

package com.example.test0508.RecyclerView;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import com.example.test0508.R;

public class RecycleViewActivity extends AppCompatActivity {

    private Button mBtnLinear;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recycle_view);
        mBtnLinear = findViewById(R.id.btn_recl_linear);
        mBtnLinear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(RecycleViewActivity.this,LinearRecycleViewActivity.class);
                startActivity(intent);
            }
        });
    }
}

<?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="wrap_content"
    android:padding="10dp"
    >


<!--    类似于ListView的功能-->
    <Button
        android:id="@+id/btn_recl_linear"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="列表视图"
        android:textSize="20sp"
    />

</LinearLayout>

---

LinearRecycleViewActivity以及页面布局

package com.example.test0508.RecyclerView;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.content.Context;
import android.graphics.Rect;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import com.example.test0508.R;

import java.util.List;


public class LinearRecycleViewActivity extends AppCompatActivity {

    private RecyclerView mRvmain;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_linear_recycle_view);
        mRvmain = findViewById(R.id.rv_main);
        mRvmain.setLayoutManager(new LinearLayoutManager(LinearRecycleViewActivity.this));
        /*
            添加分割线
         */
        mRvmain.addItemDecoration(new MyDecoration());

        mRvmain.setAdapter(new LinearAdaptor(LinearRecycleViewActivity.this, new LinearAdaptor.OnItemClickListener() {
            @Override
            public void onClick(int pos) {
                Toast.makeText(LinearRecycleViewActivity.this,"click"+pos,Toast.LENGTH_SHORT).show();
            }
        }));

    }


    class MyDecoration extends RecyclerView.ItemDecoration{
        @Override
        public void getItemOffsets(@NonNull Rect outRect, @NonNull View view, @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
            super.getItemOffsets(outRect, view, parent, state);
            outRect.set(0,0,0,getResources().getDimensionPixelOffset(R.dimen.dividerHeight));
        }
    }

}


/**
 * ******************************************************************************************
 *    线性布局的adaptor
 *
 */

class LinearAdaptor extends RecyclerView.Adapter<LinearAdaptor.LinearViewHolder>{

    private  Context mContext;

    private OnItemClickListener mListener;  //回调

    private List<String> list;

    public LinearAdaptor(Context context,OnItemClickListener listener){
        this.mContext = context;
        this.mListener = listener;

    }

    @NonNull
    @Override
    public LinearAdaptor.LinearViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        return new LinearViewHolder(LayoutInflater.from(mContext).inflate(R.layout.layout_linear_item,parent,false));
    }

    @Override
    public void onBindViewHolder(@NonNull LinearAdaptor.LinearViewHolder holder, final int position) {
        holder.textView.setText("我是修改的标题");
        /*
            设置点击事件
         */
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mListener.onClick(position);
            }
        });
    }

    @Override
    public int getItemCount() {
        return 30;
    }

    class LinearViewHolder extends RecyclerView.ViewHolder{

        private TextView textView;

        public LinearViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.tv_linear_title);
        }
    }

    public interface OnItemClickListener{
        void onClick(int pos);
    }

}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    >
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rv_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorGreen"
        />

</RelativeLayout>

这个的item

<?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="#ffffff"
    >

    <TextView
        android:id="@+id/tv_linear_title"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:gravity="center_horizontal"
        android:textSize="29sp"
        android:textColor="@color/colorBlack"
    />

</LinearLayout>