RecyclerView 打造简单的万能适配器Adapter(3)

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原创最新推荐文章于 2026-11-08 14:34:25 发布 699 阅读 AI 写同款· GEO 优化 ›

RecyclerView 打造简单的万能适配器Adapter 此处万能适配器只是简单的实现了数据的填充和点击，其他功能待后续扩展 1.首先定义一个父类的BaseViewHolder 继承 RecyclerView.ViewHolder package com.lhw.common.adapter; import android.content.Context; import android.graphics.drawable.Drawable; import android.util.SparseArray; import android.view.Lay.. 阅读详情

click and held
@param adapter this CommomBaseAdapter adapter
@param view The childView whihin the itemView that was clicked and held.
@param position The position of the view int the adapter
@return true if the callback consumed the long click ,false otherwise

boolean onItemChildLongClick(@NonNull CommomBaseAdapter adapter, @NonNull View view, int position);

}

/**

@author LHW
@date 2020/11/5.
Description：

public interface BaseListenerImp {

void setOnItemClickListener(@Nullable OnItemClickListener listener);

void setOnItemLongClickListener(@Nullable OnItemLongClickListener listener);

void setOnItemChildClickListener(@Nullable OnItemChildClickListener listener);

void setOnItemChildLongClickListener(@Nullable OnItemChildLongClickListener listener);

}

3. 实现万能适配器抽象类 CommomBaseAdapter

package com.lhw.common.adapter;

import android.content.Context;

import android.view.View;

import android.view.ViewGroup;

import androidx.annotation.NonNull;

import androidx.annotation.Nullable;

import androidx.recyclerview.widget.RecyclerView;

import com.lhw.common.adapter.listener.OnItemChildClickListener;

import com.lhw.common.adapter.listener.OnItemChildLongClickListener;

import com.lhw.common.adapter.listener.OnItemClickListener;

import com.lhw.common.adapter.listener.OnItemLongClickListener;

import java.lang.ref.WeakReference;

import java.util.ArrayList;

import java.util.LinkedHashSet;

import java.util.List;

/**

@author LHW
@date 2020/11/5.
Description：

public abstract class CommomBaseAdapter<T, VH extends BaseViewHolder> extends RecyclerView.Adapter implements BaseListenerImp {

private List mData;//填充数据列表

private Context mContext;

private int mLayoutId;

private RecyclerView mRecyclerView;

private OnItemChildClickListener mOnItemChildClickListener;

private OnItemClickListener mOnItemClickListener;

private OnItemChildLongClickListener mOnItemChildLongClickListener;

private OnItemLongClickListener mOnItemLongClickListener;

LinkedHashSet childClickViewIds = new LinkedHashSet<>();//用于保存需要设置点击事件的 item

LinkedHashSet childLongClickViewIds =new LinkedHashSet<>();//用于保存需要设置长按点击事件的 item

public CommomBaseAdapter(List data, int layoutId) {

this.mData = data;

this.mLayoutId = layoutId;

}

/**

定义数据填充抽象函数
@param holder
@param position
@param item

protected abstract void setViewContent(@NonNull VH holder, int position, T item);

@Override

public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {

super.onAttachedToRecyclerView(recyclerView);

mContext = recyclerView.getContext();

mRecyclerView = recyclerView;

}

@NonNull

@Override

public VH onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

//创建绑定ViewHolder

BaseViewHolder viewHolder = BaseViewHolder.createViewHolder(mContext, parent, viewType, mLayoutId);

//绑定点击事件

bindViewClickListener((VH) viewHolder, viewType);

return (VH) viewHolder;

}

@Override

public void onBindViewHolder(@NonNull VH holder, int position) {

//实现抽象函数的数据绑定

setViewContent(holder, position,(T) getData().get(position));

}

/**

根据位置回去条目对象
@param position
@return

public T getItem(int position){

if (!mData.isEmpty())

return mData.get(position);

return null;

}

/**对象获取条目是否存在

如果返回 -1，表示不存在
@param item T?
@return Int

public int getItemPosition(T item) {

if (item != null && !mData.isEmpty())

return mData.indexOf(item);

return -1;

}

public LinkedHashSet getChildClickViewIds() {

return childClickViewIds;

}

public LinkedHashSet getChildLongClickViewIds() {

return childLongClickViewIds;

}

/**

添加子条目点击事件
@param viewIds

public void addChildClickViewIds(int … viewIds){

for (int viewId : viewIds) {

childClickViewIds.add(viewId);

}

/**

添加子条目长按点击事件
@param viewIds

public void addChildLongClickViewIds(int … viewIds){

for (int viewId : viewIds) {

childLongClickViewIds.add(viewId);

}

/**

绑定 item 点击事件
@param holder VH

protected void bindViewClickListener(final VH holder, int viewType) {

holder.itemView.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

setOnItemClick(holder.itemView, holder.getAdapterPosition());

}

});

holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {

@Override

public boolean onLongClick(View v) {

return setOnItemLongClick(holder.itemView, holder.getAdapterPosition());

}

});

for (Integer id : getChildClickViewIds()) {

holder.itemView.findViewById(id).setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

setOnItemChildClick(v,holder.getAdapterPosition());

}

});

}

for (Integer id : getChildLongClickViewIds()) {

holder.itemView.findViewById(id).setOnLongClickListener(new View.OnLongClickListener() {

@Override

public boolean onLongClick(View v) {

return setOnItemChildLongClick(v,holder.getAdapterPosition());

}

});

}

public List getData() {

if (null == mData) {

return new ArrayList<>();

}

return mData;

}

public void setData(List mData) {

this.mData = mData;

}

@Override

public int getItemCount() {

return mData.size();

}

/**

override this method if you want to override click event logic
如果你想重新实现 item 点击事件逻辑，请重写此方法
@param v
@param position

protected void setOnItemClick(View v, int position) {

mOnItemClickListener.onItemClickListener(this, v, position);

}

/**

override this method if you want to override longClick event logic
如果你想重新实现 item 长按事件逻辑，请重写此方法
@param v
@param position
@return

protected boolean setOnItemLongClick(View v, int position) {

return mOnItemLongClickListener.onItemLongClick(this, v, position);

}

protected void setOnItemChildClick(View v, int position) {

mOnItemChildClickListener.onItemChildLongClick(this, v, position);

}

protected boolean setOnItemChildLongClick(View v, int position) {

return mOnItemChildLongClickListener.onItemChildLongClick(this, v, position);

}

@Override

public void setOnItemChildClickListener(@Nullable OnItemChildClickListener listener) {

mOnItemChildClickListener = listener;

}

@Override

public void setOnItemClickListener(@Nullable OnItemClickListener listener) {

mOnItemClickListener = listener;

}

@Override

public void setOnItemChildLongClickListener(@Nullable OnItemChildLongClickListener listener) {

mOnItemChildLongClickListener = listener;

}

@Override

public void setOnItemLongClickListener(@Nullable OnItemLongClickListener listener) {

mOnItemLongClickListener = listener;

}

public OnItemChildClickListener getOnItemChildClickListener() {

return mOnItemChildClickListener;

}

public OnItemClickListener getOnItemClickListener() {

return mOnItemClickListener;

}

public OnItemChildLongClickListener getOnItemChildLongClickListener() {

return mOnItemChildLongClickListener;

}

public OnItemLongClickListener getOnItemLongClickListener() {

return mOnItemLongClickListener;

}

4.使用演示 AppInfoAdapter 实现万能适配器

AppInfo.java

public class AppInfo {

private String name;

private Drawable icon;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Drawable getIcon() {

return icon;

}

public void setIcon(Drawable icon) {

this.icon = icon;

}

AppInfoAdapter.java

package com.lhw.jetpack.adapter;

import android.view.View;

import androidx.annotation.NonNull;

import com.lhw.common.adapter.BaseViewHolder;

import com.lhw.common.adapter.CommomBaseAdapter;

import com.lhw.jetpack.R;

import com.lhw.jetpack.model.AppInfo;

import java.util.List;

/**

@author LHW
@date 2020/11/5.
Description：

public class AppInfoAdapter extends CommomBaseAdapter<AppInfo,BaseViewHolder> {

public AppInfoAdapter(List data, int layoutId) {

super(data,layoutId );

}

@Override

protected void setViewContent(@NonNull BaseViewHolder holder, int position, AppInfo item) {

holder.setText(R.id.tv_name,item.getName())

.setImageView(R.id.iv_icon,item.getIcon());

}

MainActivity.java

public class MainActivity extends AppCompatActivity implements PagerGridLayoutManager.PageListener{

private RecyclerView rv_app_list;

private AppInfoAdapter adapter;

private LinearLayout llt_dots;

private PagerGridLayoutManager pagerGridLayoutManager;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

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per.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);