RecyclerView使用

作者: 宁静世界 | 来源:发表于2016-11-16 22:47 被阅读0次

主要包含

1,多条目
2,点击事件与屏蔽
3,条目动画
4,分割线

实现效果如下图

Paste_Image.png

第一步

添加依赖

compile 'com.android.support:recyclerview-v7:23.1.1'

第二步

在布局activity_main.xml中添加RecyclerView控件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.boatt.recylerview.MainActivity">

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

第三步

创建条目布局

recyclerview_item1.xml

<?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="match_parent">
<TextView
    android:background="@android:color/holo_green_light"
    android:padding="20dp"
    android:id="@+id/item_text"
    android:text="我是条目1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />
</LinearLayout>

recyclerview_item2.xml

<?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="match_parent">
<TextView
    android:background="@android:color/holo_green_light"
    android:padding="20dp"
    android:id="@+id/item_text"
    android:text="我是条目2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />
</LinearLayout>

第四步

在activity中开始使用RecyclerView

MainActivity.java

package com.boatt.recylerview;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;

import com.boatt.recylerview.adaper.RecyclerViewAdapter;

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

public class MainActivity extends AppCompatActivity {
   public  RecyclerView mRecyclerView;
    protected List<String> mData;//数据
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView);
        //设置RecyclerView的布局管理
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        mRecyclerView.setLayoutManager(linearLayoutManager);
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());//设置动画
        initData();
        final RecyclerViewAdapter adapter = new RecyclerViewAdapter(this, mData);
        mRecyclerView.setAdapter(adapter);//设置适配器
        adapter.setmOnItemClickListener(new RecyclerViewAdapter.OnItemClickListener() {//设置点击事件
            @Override
            public void onItemClickListener(View view, int position) {
                adapter.add(position);
            }

            @Override
            public void onItemLongClickListener(View view, int position) {
                adapter.delete(position);
            }
        });
        //添加我们自定义的分隔线
         mRecyclerView.addItemDecoration(new MyDecoration(this, MyDecoration.VERTICAL_LIST));
    }

    /**
     * 初始化数据
     */
    private void initData() {
        mData = new ArrayList<>();
        for (int i = 0; i < 60; i++) {
            mData.add("我是条目"+i);
        }
    }
}

第五步

为RecyclerView创建适配器

RecyclerViewAdapter.java

package com.boatt.recylerview.adaper;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.boatt.recylerview.R;
import com.boatt.recylerview.holder.MyViewHolder1;
import com.boatt.recylerview.holder.MyViewHolder2;

import java.util.List;

/**
 * Created by Administrator on 2016/11/16.
 */
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{
    /**
     * 条目1
     */
    private static final int ITEM1 = 1;
    /**
     * 条目2
     */
    private static final int ITEM2 = 2;
    private Context mContext;//上下文
    protected List<String> mData;//数据
    private LayoutInflater mInflater;

    /**
     * 点击事件的接口
     */
    public interface  OnItemClickListener{
        void onItemClickListener(View view, int position);//点击
        void onItemLongClickListener(View view,int position);//长按
    }
    private OnItemClickListener mOnItemClickListener;

    public void setmOnItemClickListener(OnItemClickListener mOnItemClickListener) {
        this.mOnItemClickListener = mOnItemClickListener;
    }

    @Override
    public int getItemViewType(int position) {
        return position%2==0?ITEM1:ITEM2;
    }

    /**
     * 构造函数
     * @param context
     * @param datas
     */
    public RecyclerViewAdapter(Context context,List<String> datas) {
        this.mContext=context;
        this.mData=datas;
        mInflater=LayoutInflater.from(context);

    }

    /**
     * 必须实现的方法
     * @return
     */
    @Override
    public int getItemCount() {
        return mData.size();
    }

    private static final String TAG = "RecyclerViewAdapter";
    /**
     * 创建一个ViewHolder
     * @param parent
     * @param viewType
     * @return
     */
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if(viewType == ITEM1){
            View view=mInflater.inflate(R.layout.recyclerview_item1,parent,false);//得到item的布局
            MyViewHolder1 viewHolder=new MyViewHolder1(view);
            return  viewHolder;
        }else{
            View view=mInflater.inflate(R.layout.recyclerview_item2,parent,false);//得到item的布局
            MyViewHolder2 viewHolder=new MyViewHolder2(view);
            return  viewHolder;
        }
    }

    /**
     * 绑定数据ViewHolder里面的数据
     * @param holder
     * @param position
     */

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
        if(holder instanceof MyViewHolder1){
            MyViewHolder1 holder1 =  (MyViewHolder1)holder;
            holder1.item_text.setText(mData.get(position));
            setUpItemEvent(holder1);
            return;
        }else if(holder instanceof MyViewHolder2){
            MyViewHolder2 holder2 =  (MyViewHolder2)holder;
            holder2.item_text.setText(mData.get(position));
            return ;
        }
    }

    /**
     * 实现点击事件
     * @param holder
     */
    protected void setUpItemEvent(final MyViewHolder1 holder) {
        if (mOnItemClickListener!=null){
            holder.itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    int layoutPosition = holder.getLayoutPosition();
                    mOnItemClickListener.onItemClickListener(holder.itemView,layoutPosition);
                }
            });
            holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    int layoutPosition=holder.getLayoutPosition();
                    mOnItemClickListener.onItemLongClickListener(holder.itemView,layoutPosition);
                    return false;
                }
            });
        }
    }

    /**
     * 添加
     * @param position
     */
    public void add(int position){
        mData.add(position,"position");
        notifyItemInserted(position);

    }

    /**
     * 删除
     * @param position
     */
    public void delete(int position){
        mData.remove("position");
        notifyItemRemoved(position);
    }
}

第六步

创建Holder,分别有两个

MyViewHolder1 .java

package com.boatt.recylerview.holder;

import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.TextView;

import com.boatt.recylerview.R;

/**
 * Holder
 */
public
class MyViewHolder1 extends RecyclerView.ViewHolder{

    public TextView item_text;
    public MyViewHolder1(View itemView) {
        super(itemView);
        item_text= (TextView) itemView.findViewById(R.id.item_text);
    }
}

MyViewHolder2 .java

package com.boatt.recylerview.holder;

import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.TextView;

import com.boatt.recylerview.R;

/**
 * Holder
 */
public class MyViewHolder2 extends RecyclerView.ViewHolder{

    public TextView item_text;
    public MyViewHolder2(View itemView) {
        super(itemView);
        item_text= (TextView) itemView.findViewById(R.id.item_text);
    }
}

第七步

创建分割线

MyDecoration .java

package com.boatt.recylerview;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;

/**
 * Created by Administrator on 2016/11/16.
 */
public class MyDecoration extends RecyclerView.ItemDecoration{
    private static final int[] ATTRS = new int[]{
            android.R.attr.listDivider
    };

    public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL;

    public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL;

    private Drawable mDivider;

    private int mOrientation;

    public MyDecoration(Context context, int orientation) {
        final TypedArray a = context.obtainStyledAttributes(ATTRS);
        mDivider = a.getDrawable(0);
        a.recycle();
        setOrientation(orientation);
    }

    public void setOrientation(int orientation) {
        if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) {
            throw new IllegalArgumentException("invalid orientation");
        }
        mOrientation = orientation;
    }

    @Override
    public void onDraw(Canvas c, RecyclerView parent) {

        if (mOrientation == VERTICAL_LIST) {
            drawVertical(c, parent);
        } else {
            drawHorizontal(c, parent);
        }

    }


    public void drawVertical(Canvas c, RecyclerView parent) {
        final int left = parent.getPaddingLeft();
        final int right = parent.getWidth() - parent.getPaddingRight();

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            android.support.v7.widget.RecyclerView v = new android.support.v7.widget.RecyclerView(parent.getContext());
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int top = child.getBottom() + params.bottomMargin;
            final int bottom = top + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    public void drawHorizontal(Canvas c, RecyclerView parent) {
        final int top = parent.getPaddingTop();
        final int bottom = parent.getHeight() - parent.getPaddingBottom();

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int left = child.getRight() + params.rightMargin;
            final int right = left + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    @Override
    public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
        if (mOrientation == VERTICAL_LIST) {
            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
        } else {
            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
        }
    }
}

第八步

自定义分割线
在drawable文件夹下面

divider.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <solid android:color="#fff"/>
    <size android:height="5dp"/>

</shape>

第九步

为当前主题应用该分割线
在values文件夹中

values/styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
        <item name="android:listDivider">@drawable/divider</item>
    </style>

</resources>

RecyclerView使用

主要包含

实现效果如下图

第一步

第二步

第三步

第四步

第五步

第六步

第七步

第八步

第九步

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