Android仿泡泡窗实现下拉菜单条实例代码

 //让泡泡窗额度条目获取到焦点 popupWindow.setFocusable(true); //设置背景图 popupWindow.setBackgroundDrawable(new BitmapDrawable()); popupWindow.setOutsideTouchable(true); 

 package com.ldw.select; import java.util.ArrayList; import android.app.Activity; import android.graphics.drawable.BitmapDrawable; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.BaseAdapter; import android.widget.EditText; import android.widget.ImageView; import android.widget.ListView; import android.widget.PopupWindow; import android.widget.TextView; public class MainActivity extends Activity implements OnClickListener{ private ImageView iv_select; private EditText et; private ArrayList list = new ArrayList(); private TextView tv_number; private ImageView iv_delete; private ListView listView; private PopupWindow popupWindow; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); initView(); initListener(); initData(); } private void initView() { setContentView(R.layout.activity_main); iv_select = (ImageView) findViewById(R.id.iv_select); et = (EditText) findViewById(R.id.et); } private void initListener() { iv_select.setOnClickListener(this); } //集合中添加数据 private void initData() { for(int i = 0; i<20; i++){ list.add(1340000000 + i + ""); } initListView(); } //初始化列表 private void initListView(){ listView = new ListView(this); //设置listView的背景图 listView.setBackgroundResource(R.drawable.ic_launcher); //让listView的滚动条不可见 listView.setVerticalScrollBarEnabled(false); MyAdapter adapter = new MyAdapter(); listView.setAdapter(adapter); listView.setOnItemClickListener(new OnItemClickListener(){ @Override public void onItemClick(AdapterView parent, View view, int position, long id) { et.setText(list.get(position)); //关闭泡泡窗 popupWindow.dismiss(); } }); } //泡泡窗实现点击显示列表,泡泡窗默认是不获取焦点的 private void showNumberList(){ if(popupWindow == null){ //泡泡窗的填充,设置宽高 popupWindow = new PopupWindow(listView, et.getWidth(), 300); } //让泡泡窗额度条目获取到焦点 popupWindow.setFocusable(true); //设置背景图 popupWindow.setBackgroundDrawable(new BitmapDrawable()); popupWindow.setOutsideTouchable(true); //第一个参数是依附哪一个参数下,x轴，y轴的偏移量，相对于第一个参数的左下角的位置 popupWindow.showAsDropDown(et, 0, 0); } @Override public void onClick(View v){ switch (v.getId()){ case R.id.iv_select: //点击弹出列表 showNumberList(); break; } } //listView填充 class MyAdapter extends BaseAdapter{ @Override public int getCount() { return list.size(); } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return 0; } @Override public View getView(final int position, View convertView, ViewGroup parent) { final View view = View.inflate(MainActivity.this, R.layout.item_list, null); tv_number = (TextView) view.findViewById(R.id.tv_number); iv_delete = (ImageView) view.findViewById(R.id.iv_delete); tv_number.setText(list.get(position)); //删除按键 iv_delete.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { //删除条目 list.remove(position); //更新页面 notifyDataSetChanged(); //根据当前条目的个数设置，当前条目的高度 int listViewHeight = list.size() * view.getHeight(); if(listViewHeight > 300){ listViewHeight = 300; }else{ listViewHeight = listViewHeight; } //更新泡泡窗的高度 popupWindow.update(et.getWidth(), listViewHeight); //删除完了，泡泡窗小消失 if(list.size() == 0){ popupWindow.dismiss(); //下拉条消失 iv_select.setVisibility(View.GONE); } } }); return view; } } }