PopupWindow+RecyclerView实现上下滑动框功能

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<FileListAdapter.ViewHolder> {
 private final String TAG = "FileListAdapter";
 private List<String> 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<String> 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

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:orientation="horizontal"
 android:background="@color/colorPrimaryDark"
 android:layout_margin="1dp">

<TextView
   android:id="@+id/file_name"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:textColor="@color/colorWhite"
   android:textSize = "30sp"/>

</LinearLayout>

4.pop_window.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent">

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

来源：https://blog.csdn.net/pkx1993/article/details/81183572