recyclerView 的万能适配器

activity

这里写代码片package com.example.recyclerview;

import android.content.Intent;
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 java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private RecyclerView recyclerView;
    List<use> uses = new ArrayList<>();
    RecyclerView.Adapter adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recyclerView = (RecyclerView) findViewById(R.id.recyView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        initData();
        recyclerView.setAdapter(adapter=new RecyclerAdapter<use>(MainActivity.this, uses, R.layout.item_recycler) {

            @Override
            public void convert(RecycleHolder holder, use muse, int position) {
                holder.setText(R.id.name, muse.getName());
                holder.setText(R.id.age, muse.getAge());

            }
        });




    }

    private void initData() {
        for (int i = 0; i <30 ; i++) {
            use myUse=new use();
            myUse.setName("小王");
            myUse.setAge("12");
            uses.add(myUse);
        }

    }

}

BaseRecyclerAdapter

package com.example.recyclerview;


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

        import java.util.List;

/**
 * 万能的RecyclerView适配器
 * Created by 南尘 on 16-7-30.
 */
public abstract class BaseRecyclerAdapter<T> extends RecyclerView.Adapter<BaseRecyclerHolder> {

    private Context context;//上下文
    private List<T> list;//数据源
    private LayoutInflater inflater;//布局器
    private int itemLayoutId;//布局id
    private boolean isScrolling;//是否在滚动
    private OnItemClickListener listener;//点击事件监听器
    private OnItemLongClickListener longClickListener;//长按监听器
    private RecyclerView recyclerView;

    //在RecyclerView提供数据的时候调用
    @Override
    public void onAttachedToRecyclerView(RecyclerView recyclerView) {
        super.onAttachedToRecyclerView(recyclerView);
        this.recyclerView = recyclerView;
    }

    @Override
    public void onDetachedFromRecyclerView(RecyclerView recyclerView) {
        super.onDetachedFromRecyclerView(recyclerView);
        this.recyclerView = null;
    }

    /**
     * 定义一个点击事件接口回调
     */
    public interface OnItemClickListener {
        void onItemClick(RecyclerView parent, View view, int position);
    }

    public interface OnItemLongClickListener {
        boolean onItemLongClick(RecyclerView parent, View view, int position);
    }

    /**
     * 插入一项
     *
     * @param item
     * @param position
     */
    public void insert(T item, int position) {
        list.add(position, item);
        notifyItemInserted(position);
    }

    /**
     * 删除一项
     *
     * @param position 删除位置
     */
    public void delete(int position) {
        list.remove(position);
        notifyItemRemoved(position);
    }

    public BaseRecyclerAdapter(Context context, List<T> list, int itemLayoutId) {
        this.context = context;
        this.list = list;
        this.itemLayoutId = itemLayoutId;
        inflater = LayoutInflater.from(context);

        //        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        //            @Override
        //            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        //                super.onScrollStateChanged(recyclerView, newState);
        //                isScrolling = !(newState == RecyclerView.SCROLL_STATE_IDLE);
        //                if (!isScrolling) {
        //                    notifyDataSetChanged();
        //                }
        //            }
        //        });
    }

    @Override
    public BaseRecyclerHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = inflater.inflate(itemLayoutId, parent, false);
        return BaseRecyclerHolder.getRecyclerHolder(context, view);
    }

    @Override
    public void onBindViewHolder(final BaseRecyclerHolder holder, int position) {

        if (listener != null){
           // holder.itemView.setBackgroundResource(R.drawable.recycler_bg);//设置背景
        }
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (listener != null && view != null && recyclerView != null) {
                    int position = recyclerView.getChildAdapterPosition(view);
                    listener.onItemClick(recyclerView, view, position);
                }
            }
        });


        holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                if (longClickListener != null && view != null && recyclerView != null) {
                    int position = recyclerView.getChildAdapterPosition(view);
                    longClickListener.onItemLongClick(recyclerView, view, position);
                    return true;
                }
                return false;
            }
        });

        convert(holder, list.get(position), position, isScrolling);

    }

    @Override
    public int getItemCount() {
        return list == null ? 0 : list.size();
    }

    public void setOnItemClickListener(OnItemClickListener listener) {
        this.listener = listener;
    }

    public void setOnItemLongClickListener(OnItemLongClickListener longClickListener) {
        this.longClickListener = longClickListener;
    }

    /**
     * 填充RecyclerView适配器的方法，子类需要重写
     *
     * @param holder      ViewHolder
     * @param item        子项
     * @param position    位置
     * @param isScrolling 是否在滑动
     */
    public abstract void convert(BaseRecyclerHolder holder, T item, int position, boolean isScrolling);
}

BaseRecyclerHolder

package com.example.recyclerview;

        import android.content.Context;
        import android.graphics.Bitmap;
        import android.support.v7.widget.RecyclerView;
        import android.util.SparseArray;
        import android.view.View;
        import android.widget.ImageView;
        import android.widget.TextView;

       // import com.squareup.picasso.Picasso;

/**
 * 万能的RecyclerView的ViewHolder
 * Created by 南尘 on 16-7-30.
 */
public class BaseRecyclerHolder extends RecyclerView.ViewHolder {

    private SparseArray<View> views;
    private Context context;

    private BaseRecyclerHolder(Context context,View itemView) {
        super(itemView);
        this.context = context;
        //指定一个初始为8
        views = new SparseArray<>(8);
    }

    /**
     * 取得一个RecyclerHolder对象
     * @param context 上下文
     * @param itemView 子项
     * @return 返回一个RecyclerHolder对象
     */
    public static BaseRecyclerHolder getRecyclerHolder(Context context,View itemView){
        return new BaseRecyclerHolder(context,itemView);
    }

    public SparseArray<View> getViews(){
        return this.views;
    }

    /**
     * 通过view的id获取对应的控件，如果没有则加入views中
     * @param viewId 控件的id
     * @return 返回一个控件
     */
    @SuppressWarnings("unchecked")
    public <T extends View> T getView(int viewId){
        View view = views.get(viewId);
        if (view == null ){
            view = itemView.findViewById(viewId);
            views.put(viewId,view);
        }
        return (T) view;
    }

    /**
     * 设置字符串
     */
    public BaseRecyclerHolder setText(int viewId,String text){
        TextView tv = getView(viewId);
        tv.setText(text);
        return this;
    }

    /**
     * 设置图片
     */
    public BaseRecyclerHolder setImageResource(int viewId,int drawableId){
        ImageView iv = getView(viewId);
        iv.setImageResource(drawableId);
        return this;
    }

    /**
     * 设置图片
     */
    public BaseRecyclerHolder setImageBitmap(int viewId, Bitmap bitmap){
        ImageView iv = getView(viewId);
        iv.setImageBitmap(bitmap);

        return this;
    }

   /* *//**
     * 设置图片
     *//*
    public BaseRecyclerHolder setImageByUrl(int viewId,String url){
        Picasso.with(context).load(url).into((ImageView) getView(viewId));
        //        ImageLoader.getInstance().init(ImageLoaderConfiguration.createDefault(context));
        //        ImageLoader.getInstance().displayImage(url, (ImageView) getView(viewId));
        return this;
    }*/
}

item 分割线

package com.example.recyclerview;

import android.support.v7.widget.RecyclerView;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.TypedValue;
import android.view.View;

/**
 * Created by Administrator on 2016/9/4.
 */
public class DividerItemDecoration extends RecyclerView.ItemDecoration{
    /*
        * RecyclerView的布局方向，默认先赋值
        * 为纵向布局
        * RecyclerView 布局可横向，也可纵向
        * 横向和纵向对应的分割想画法不一样
        * */
    private int mOrientation = LinearLayoutManager.VERTICAL ;

    /**
     * item之间分割线的size，默认为1
     */
    private int mItemSize = 1 ;

    /**
     * 绘制item分割线的画笔，和设置其属性
     * 来绘制个性分割线
     */
    private Paint mPaint ;

    /**
     * 构造方法传入布局方向，不可不传
     * @param context
     * @param orientation
     */
    public DividerItemDecoration(Context context,int orientation) {
        this.mOrientation = orientation;
        if(orientation != LinearLayoutManager.VERTICAL && orientation != LinearLayoutManager.HORIZONTAL){
            throw new IllegalArgumentException("请传入正确的参数") ;
        }
        mItemSize = (int) TypedValue.applyDimension(mItemSize, TypedValue.COMPLEX_UNIT_DIP,context.getResources().getDisplayMetrics());
        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG) ;
        mPaint.setColor(Color.BLUE);
         /*设置填充*/
        mPaint.setStyle(Paint.Style.FILL);
    }

    @Override
    public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
        if(mOrientation == LinearLayoutManager.VERTICAL){
            drawVertical(c,parent) ;
        }else {
            drawHorizontal(c,parent) ;
        }
    }

    /**
     * 绘制纵向 item 分割线
     * @param canvas
     * @param parent
     */
    private void drawVertical(Canvas canvas,RecyclerView parent){
        final int left = parent.getPaddingLeft() ;
        final int right = parent.getMeasuredWidth() - parent.getPaddingRight() ;
        final int childSize = parent.getChildCount() ;
        for(int i = 0 ; i < childSize ; i ++){
            final View child = parent.getChildAt( i ) ;
            RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams();
            final int top = child.getBottom() + layoutParams.bottomMargin ;
            final int bottom = top + mItemSize ;
            canvas.drawRect(left,top,right,bottom,mPaint);
        }
    }

    /**
     * 绘制横向 item 分割线
     * @param canvas
     * @param parent
     */
    private void drawHorizontal(Canvas canvas,RecyclerView parent){
        final int top = parent.getPaddingTop() ;
        final int bottom = parent.getMeasuredHeight() - parent.getPaddingBottom() ;
        final int childSize = parent.getChildCount() ;
        for(int i = 0 ; i < childSize ; i ++){
            final View child = parent.getChildAt( i ) ;
            RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams();
            final int left = child.getRight() + layoutParams.rightMargin ;
            final int right = left + mItemSize ;
            canvas.drawRect(left,top,right,bottom,mPaint);
        }
    }

    /**
     * 设置item分割线的size
     * @param outRect
     * @param view
     * @param parent
     * @param state
     */
    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
        if(mOrientation == LinearLayoutManager.VERTICAL){
            outRect.set(0,0,0,mItemSize);
        }else {
            outRect.set(0,0,mItemSize,0);
        }
    }
}