一,activity
package com.example.downPushSelect;
import java.util.ArrayList;
import android.app.Activity;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;
public class MainActivity extends Activity {
private EditText et_input;
private ImageButton ib_down_arrow;
private ArrayList<String> dataList;
private ListView listView;
private myAdapter myAdapter;
private PopupWindow popupWindow;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initUI();
initClick();
}
/**
* 初始化显示数据
*/
private void initData() {
// 存放显示的数据
dataList = new ArrayList<String>();
String message = null;
// 给message循环赋值,并加入dataList集合
for (int i = 0; i < 40; i++) {
message = "10086" + i;
dataList.add(message);
}
}
/**
* 点击事件
*/
private void initClick() {
// 点击下拉框,展示popupwindow
ib_down_arrow.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showPopupWindow();
}
});
}
/**
* 展示popwindow
*/
protected void showPopupWindow() {
// 创建好listview,并设置适配器
createListView();
popupWindow = new PopupWindow(listView, et_input.getWidth(), 300);
// 单击别处可使popwindow关闭
popupWindow.setOutsideTouchable(true);
// 获取焦点
popupWindow.setFocusable(true);
popupWindow.setBackgroundDrawable(new BitmapDrawable());
popupWindow.showAsDropDown(et_input, 0, -5);
}
/**
* 创建listview
*/
private void createListView() {
// 创建ListView
listView = new ListView(this);
listView.setBackgroundResource(R.drawable.listview_background);
initData();
// 填充适配器
myAdapter = new myAdapter();
listView.setAdapter(myAdapter);
// 设置点击事件
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
String string = dataList.get(position);
et_input.setText(string);
popupWindow.dismiss();
}
});
}
private class ViewHolder {
public TextView des;
public ImageButton del;
}
/**
* 找到控件
*/
private void initUI() {
et_input = (EditText) findViewById(R.id.et_input);
ib_down_arrow = (ImageButton) findViewById(R.id.ib_down_arrow);
}
private class myAdapter extends BaseAdapter {
@Override
public View getView(final int position, View convertView,
ViewGroup parent) {
// 复用convertView
ViewHolder vh = null;
if (convertView == null) {
convertView = View.inflate(getApplicationContext(),
R.layout.item_user_message, null);
vh = new ViewHolder();
vh.des = (TextView) convertView.findViewById(R.id.tv_des);
vh.del = (ImageButton) convertView.findViewById(R.id.ib_del);
convertView.setTag(vh);
} else {
vh = (ViewHolder) convertView.getTag();
}
// 设置条目信息
String str = getItem(position);
vh.des.setText(str);
// 设置点击事件
vh.del.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
dataList.remove(position);
notifyDataSetChanged();
if (dataList.size() == 0) {
popupWindow.dismiss();
}
}
});
return convertView;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public String getItem(int position) {
return dataList.get(position);
}
@Override
public int getCount() {
return dataList.size();
}
}
}
2.布局文件
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${relativePackage}.${activityClass}" >
<RelativeLayout
android:layout_width="200dp"
android:layout_height="35dp" >
<EditText
android:id="@+id/et_input"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<ImageButton
android:id="@+id/ib_down_arrow"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="@null"
android:src="@drawable/down_arrow" />
</RelativeLayout>
</RelativeLayout>
item_user_message.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:descendantFocusability="blocksDescendants"
android:gravity="center_vertical"
android:orientation="horizontal" >
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:src="@drawable/user" />
<TextView
android:id="@+id/tv_des"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="1008611"
android:textColor="#000"
android:textSize="18sp" />
<ImageButton
android:id="@+id/ib_del"
android:layout_width="20dp"
android:layout_height="20dp"
android:background="@null"
android:src="@drawable/delete" />
</LinearLayout>
ps:item最外层要设置这个,要不条目没法点击
android:descendantFocusability="blocksDescendants"