PopupWindow泡泡效果

原创

mb61c2e9efaa57a 2022-01-05 15:46:07 ©著作权

©著作权归作者所有：来自51CTO博客作者mb61c2e9efaa57a的原创作品，请联系作者获取转载授权，否则将追究法律责任

在使用手机的时候看到这个效果，上网查了一下，是使用了PopupWindow实现的

在此记录一下：

主要代码：


import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.SimpleAdapter;

public class PopActivity extends ListActivity implements OnItemClickListener{
    private List<Map<String,Object>> list ;
    ListView listview;
    PopupWindow pw = null;
    //头像的Id数组
    int head[]  = {R.drawable.image1,R.drawable.image2,R.drawable.image3,
            R.drawable.image4,R.drawable.image5};

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       listview =  getListView();
        initData();//生成几条记录
        SimpleAdapter adapter =new SimpleAdapter(this, list,R.layout.people ,new String []{"head","name","num"} , new int []{R.id.head,R.id.text,R.id.num});
       setListAdapter(adapter);
      listview.setOnItemClickListener(this);
    }
    public void initData(){
        list = new ArrayList<Map<String,Object>>();
        for(int i = 0;i<5;i++){
            Map<String ,Object> map  = new HashMap<String, Object>();
            map.put("head", head[i]);
            map.put("name","第"+i+"位用户");
            map.put("num","12445533"+i);
            list.add(map);
        }
    }
    @Override
    public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {
        // TODO Auto-generated method stub
        LayoutInflater factory = LayoutInflater.from(PopActivity.this);
        final View textEntryView = factory.inflate(R.layout.paopao_alert_dialog, null);
        //获取WindowManager对象
        WindowManager wm = (WindowManager)getSystemService(Context.WINDOW_SERVICE);   
        int envWidth = wm.getDefaultDisplay().getWidth();   
        int envHeight = wm.getDefaultDisplay().getHeight();  
        if(pw == null)
        {
            pw = new PopupWindow(textEntryView); 
            pw.showAtLocation(v, Gravity.LEFT,0,0); //在父视图的左上方显示
        }else if(!pw.isShowing()){
            pw = new PopupWindow(textEntryView); 
            pw.showAtLocation(v, Gravity.LEFT,0,0); 
        }
        int pwH = 70;
        int pwW = 166;
        int y = -envHeight/2+v.getTop() + pwH;
        pw.update(0,y,pwW,pwH); //更新位置。
        textEntryView.findViewById(R.id.phone).setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // TODO Auto-generated method stub
                pw.dismiss();
            }

        });
    }
}