本文实例为大家分享了PopupWindow+RecyclerView实现上下滑动框功能的具体代码，供大家参考，具体内容如下

1.新建一个适配器继承自RecyclerView.Adapter

package aud.hik.com.audiorecordtool;

import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.TextView;

import java.util.List;

public class FileListAdapter extends RecyclerView.Adapter {

private final String TAG = "FileListAdapter";

private List mFileList = null;

private OnItemClickListener mOnItemClickListener = null;

static class ViewHolder extends RecyclerView.ViewHolder{

TextView fileNameView;

public ViewHolder(View view) {

super(view);

fileNameView = (TextView) view.findViewById(R.id.file_name);

}

}

public FileListAdapter(List fileList) {

this.mFileList = fileList;

}

//加载item 的布局 创建ViewHolder实例

@Override

public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item,parent,false);//加载view布局文件

ViewHolder holder = new ViewHolder(view);

return holder;

}

//对RecyclerView子项数据进行赋值

@Override

public void onBindViewHolder(ViewHolder holder, int position) {

if(null == holder)

{

MyLog.LOGE(TAG,"Holder is null");

return;

}

final String fileName= mFileList.get(position);

MyLog.LOGI(TAG,"filename = "+fileName +"filenameview = "+holder.fileNameView);

holder.fileNameView.setText(fileName);

final int tempPosition = position;

if(null != mOnItemClickListener)

{

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

@Override

public void onClick(View v) {

mOnItemClickListener.onClickItem(tempPosition,fileName);

}

});

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

// @Override

// public boolean onLongClick(View v) {

// mOnItemClickListener.onLongClick(tempPosition,fileName);

// return false;

// }

// });

}

}

//返回子项个数

@Override

public int getItemCount() {

return mFileList.size();

}

public interface OnItemClickListener{

void onClickItem( int position,String fileName);

// void onLongClickItem( int position,String fileName);

}

public void setOnItemClickListener(OnItemClickListener onItemClickListener ){

this.mOnItemClickListener = onItemClickListener;

}

}

2.mainactivity中需要调用的方法

private void showPopupWindow(){

View view = LayoutInflater.from(this).inflate(R.layout.pop_window,null);

//初始化List数据

mVecFile = getFileName(TEXT_READ);

//初始化RecyclerView

RecyclerView recyslerview = (RecyclerView) view.findViewById(R.id.recycler_view);

//创建LinearLayoutManager 对象 这里使用 LinearLayoutManager 是线性布局的意思

LinearLayoutManager layoutmanager = new LinearLayoutManager(this);

//设置RecyclerView 布局

recyslerview.setLayoutManager(layoutmanager);

//设置Adapter

FileListAdapter adapter = new FileListAdapter(mVecFile);

adapter.setOnItemClickListener(new FileListAdapter.OnItemClickListener() {

// @Override

// public void onLongClickItem(int position,String fileName) {

// Toast.makeText(AudioRecordActivity.this,"onLongClick事件 您点击了第："+position+"个Item",Toast.LENGTH_SHORT).show();

// }

@Override

public void onClickItem(int position,String fileName) {

mTextName = fileName;

mEdiTxtName.setText(mTextName);

String mTextPath = TEXT_READ+"/"+mTextName;

// File file = new File(path);

Toast.makeText(AudioRecordActivity.this, mTextPath, Toast.LENGTH_SHORT).show();

mList = new ArrayList<>();

try {

FileReader fr = new FileReader(mTextPath);

BufferedReader br = new BufferedReader(fr);//以行的方式读取文件

String str = null;

while(null != (str = br.readLine()))

{

mList.add(str);

MyLog.LOGI(TAG,str);

}

fr.close();

br.close();

}

catch(FileNotFoundException e)

{

e.printStackTrace();

}

catch (IOException e){

e.printStackTrace();

}

MyLog.LOGI(TAG,"list size="+mList.size());

if(0 != mList.size())

{

mTextView.setText(mList.get(mListIndex));

}

else

{

return;

}

}

});

recyslerview.setAdapter(adapter);

//解决android7.0以上手机的适配问题

PopupWindow popupWindow = new PopupWindow(view, LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT){

@Override

public void showAsDropDown(View anchor) {

if(Build.VERSION.SDK_INT >= 24){

Rect visibleFrame = new Rect();

anchor.getGlobalVisibleRect(visibleFrame);

int height = anchor.getResources().getDisplayMetrics().heightPixels - visibleFrame.bottom;

setHeight(height);

}

super.showAsDropDown(anchor);

}

@Override

public void showAsDropDown(View anchor, int xoff, int yoff) {

if(Build.VERSION.SDK_INT >= 24) {

Rect rect = new Rect();

anchor.getGlobalVisibleRect(rect);

int h = anchor.getResources().getDisplayMetrics().heightPixels - rect.bottom;

setHeight(h);

}

super.showAsDropDown(anchor, xoff, yoff);

}

};

ColorDrawable dw = new ColorDrawable(0x10000000);

popupWindow.setBackgroundDrawable(dw);

popupWindow.setOutsideTouchable(true);

popupWindow.setFocusable(true);

popupWindow.showAsDropDown(mEdiTxtName);

}

3.item.xml

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="horizontal"

android:background="@color/colorPrimaryDark"

android:layout_margin="1dp">

android:id="@+id/file_name"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:textColor="@color/colorWhite"

android:textSize = "30sp"/>

4.pop_window.xml

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent">

android:id="@+id/recycler_view"

android:layout_width="match_parent"

android:layout_height="match_parent">

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。