Android 浮动弹框PopupWindow

浮动弹框简单样例：

1.Activity：

package com.example.myapi.popupwindow;

import java.util.ArrayList;

import android.app.Activity;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.PopupWindow;

import com.example.myapi.R;

/**
 * 浮动窗口实例
 * @author USER
 *
 */
public class PopupWindowActivity extends Activity implements OnClickListener{
    private PopupWindow more; 
    private LayoutInflater inflater; 
    private View layout;
    private Button btn;
    private ListView listview;
    ArrayAdapter<String> adapter;
    ArrayList<String> list = new ArrayList<String>();
    @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());
        /*listview = (ListView)findViewById(R.id.listview);
        listview.setAdapter(adapter);*/
        //实例化PopupWindow创建菜单 
        initMore();
    }
    
    public void onClick(View v) {
        if(btn.getId() == v.getId()){
            if(!more.isShowing()){
                show(btn);
            }
        }
    }
    
    public void initMore(){
        //实例化LayoutInflater
        inflater = (LayoutInflater)this.getSystemService(this.LAYOUT_INFLATER_SERVICE);
        //获取弹框布局
        layout = inflater.inflate(R.layout.more, null);
        ListView listView = (ListView)layout.findViewById(R.id.listview);
        listView.setAdapter(new PopupWindowAdapter(this, getData()));
        //设置PopupWindow的布局
        more =  new PopupWindow(layout, 100, 200);
        more.setWidth(150);
        more.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
        //使其聚焦
        more.setFocusable(true);
        //设置允许在外点击消失
        more.setOutsideTouchable(true);
        // 这个是为了点击“返回Back”也能使其消失，并且并不会影响你的背景  
        more.setBackgroundDrawable(new BitmapDrawable());  
        
    }
    //显示window
    public void show(View anchor){
//        more.showAtLocation(this.findViewById(R.id.popup_layout), Gravity.BOTTOM|Gravity.RIGHT, 0, 0);
        more.showAsDropDown(anchor);
    }
    private ArrayList<String> getData(){
        list.add("朋友");
        list.add("家人");
        list.add("同学");
        list.add("同事");
        list.add("陌生人");
        list.add("我的好友");
        return list;
    }
}

2.主文件：

<?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>

 

复制以上代码，体验一下吧。。