Android Studio [RecyclerView/列表视图]

Posted 2021-02-16 雾霾王者

LinearRecyclerViewActivity.java

package com.xdw.a122.recyclerview;

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

import com.xdw.a122.R;

public class LinearRecyclerViewActivity extends AppCompatActivity {
    private RecyclerView mRvmain;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_linear_recycler_view);
        mRvmain=findViewById(R.id.rv_main);
        mRvmain.setLayoutManager(new LinearLayoutManager(LinearRecyclerViewActivity.this));
        mRvmain.addItemDecoration(new SimpleDividerItemDecoration(this,20, 5));
        mRvmain.setAdapter(new LinearAdapter(LinearRecyclerViewActivity.this, new LinearAdapter.OnItemClickListener() {
            @Override
            public void onClick(int pos) {
                Toast.makeText(LinearRecyclerViewActivity.this,"Click"+pos,Toast.LENGTH_LONG).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));
        }
    }
}

LinearAdapter.java

package com.xdw.a122.recyclerview;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.design.animation.Positioning;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import com.xdw.a122.R;

import java.util.List;

public class LinearAdapter extends RecyclerView.Adapter<LinearAdapter.LinearViewHolder> {
    private Context mContext;
    private OnItemClickListener mlistener;  //分配空间
    //private List<String> list;
    public LinearAdapter(Context context,OnItemClickListener listener){
        this.mContext=context;             //内容
        this.mlistener=listener;          //传输位置
    }
    @NonNull
    @Override
    public LinearAdapter.LinearViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        return new LinearViewHolder(LayoutInflater.from(mContext).inflate(R.layout.layout_linear_item,viewGroup,false));
    }

    @Override
    public void onBindViewHolder(@NonNull LinearAdapter.LinearViewHolder viewHolder, final int i) {
        viewHolder.textView.setText("Hello World");  //内容
        viewHolder.itemView.setOnClickListener(new View.OnClickListener() {  //监听器按键
            @Override
            public void onClick(View v) {
                mlistener.onClick(i);       //监听器
            }
        });
    }

    @Override
    public int getItemCount() {
        return 30;
    }
    class LinearViewHolder extends RecyclerView.ViewHolder{
        public TextView textView;
        public LinearViewHolder(@NonNull View itemView) {
            super(itemView);
            textView=itemView.findViewById(R.id.tv_title);
        }
    }
    public interface OnItemClickListener{  //字节型监听器
        void onClick(int pos);

    }
}

RecyclerViewActivity

package com.xdw.a122.recyclerview;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import com.xdw.a122.R;

public class RecyclerViewActivity extends AppCompatActivity {
    private Button mBtnLinear;
    private Button mBtnHor;
    private Button mBtnGrid;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recycle_view);
        mBtnLinear=findViewById(R.id.btn_linear);
        mBtnLinear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(RecyclerViewActivity.this,LinearRecyclerViewActivity.class);
                startActivity(intent);
            }
        });
        mBtnHor=findViewById(R.id.btn_hor);
        mBtnHor.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(RecyclerViewActivity.this,HorRecyclerViewActivity.class);
                startActivity(intent);
            }
        });
        mBtnGrid=findViewById(R.id.btn_grid);
        mBtnGrid.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(RecyclerViewActivity.this,GridRecyclerViewActivity.class);
                startActivity(intent);
            }
        });
    }
}

 

activity_layout_linear_item.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="wrap_content"
    >
    <TextView
        android:id="@+id/tv_title"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:gravity="center"
        android:textColor="#000"
        android:textSize="20sp"
        />
</LinearLayout>

 

activity_linear_recycler_view.xml

<?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"
    tools:context=".recyclerview.LinearRecyclerViewActivity">
    <android.support.v7.widget.RecyclerView
        android:id="@+id/rv_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"

        />
</RelativeLayout>

activity_recycler_view.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:orientation="vertical">

    
    <Button
        android:id="@+id/btn_linear"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="列表视图"/>
    <Button
        android:id="@+id/btn_hor"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="水平滚动"/>
    <Button
        android:id="@+id/btn_grid"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="网格结构"/>
</LinearLayout>

结果：