Android 浮动列表ListPopupWindow

1.Activity：

package com.example.myapi.popupwindow;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListPopupWindow;

import com.example.myapi.R;

/**
 * 实现列表浮动窗口
 * @author USER
 *
 */
public class ListPopupWindowActivity extends Activity implements OnClickListener{
    ArrayList<String> list = new ArrayList<String>();
    private Button btn;
    ArrayAdapter<String> adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.popup);
        btn = (Button)findViewById(R.id.btn_popup);
        btn.setOnClickListener(this);
        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_expandable_list_item_1,getData());
    }
    
    public void onClick(View v) {
        if(v.getId() == btn.getId()){
            showListPopupWindow(btn);
        }
    }
    
    private void showListPopupWindow(View anchor){
        
        ListPopupWindow listPopupWindow = new ListPopupWindow(this);
        listPopupWindow.setAnchorView(anchor);
        
        
        listPopupWindow.setAdapter(adapter);
        
        if(!listPopupWindow.isShowing()){
            listPopupWindow.show();
        }
        
    }
    
    private ArrayList<String> getData(){
        list.add("系统设置");
        list.add("关注查看");
        list.add("收藏查看");
        list.add("历史浏览");
        return list;
    }
}

2.Adapter

package com.example.myapi.popupwindow;

import java.util.ArrayList;

import com.example.myapi.R;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class PopupWindowAdapter extends BaseAdapter{
    private ArrayList<String> datas;
    private Context context;
    public PopupWindowAdapter(Context context,ArrayList<String> datas){
        this.context = context;
        this.datas = datas;
    }
    public int getCount() {
        return datas.size();
    }

    public Object getItem(int position) {
        return datas.get(position);
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        if(convertView == null){
            convertView = LayoutInflater.from(context).inflate(R.layout.more_item, null);
            TextView tv = (TextView)convertView.findViewById(R.id.more_tv);
            tv.setText(datas.get(position));
        }
        return convertView;
    }
    

}

3.主布局xml

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

    <Button
        android:id="@+id/btn_popup"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Button" />

</LinearLayout>

 

注意：ListPopupWindow是从android版本11开始的。其他的就没什么要注意的了，复制粘贴到你的项目中，体验一下吧。