recyclerView 的万能适配器

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);
}

}

}

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);
}

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;
}*/
}

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);
}
}
}