PopupWindow+RecyclerView实现上下滑动框功能

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原创最新推荐文章于 2026-05-18 16:57:55 发布 579 阅读 AI 写同款· GEO 优化 ›

Android 自定义下拉菜单的实现（基于PopupWindow+RecyclerView）文章目录一、引言二、效果三、代码实现四、结语一、引言安卓自带的Spinner局限性较大，基本不能满足开发样式要求，当前又没有成熟的相关框架，所以决定自己使用PopupWindow实现一个下拉菜单二、效果三、代码实现布局：新建xml文件:layout_dropdown_menu <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/ap 阅读详情

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