Android 可编辑下拉选择框

Android EditText可输入可选择的EditText

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1.页面布局 layout 片段

        <RelativeLayout 
            android:id="@+id/projectmodule"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="40sp"
            android:minHeight="50sp">
            
            <TextView 
                android:id="@+id/txt_project"
                style="@style/label_text"
                android:text="项目名称"/>
            
            <EditText
                android:id="@+id/enrol_project_name"
                style="@style/inputText"
                android:layout_toRightOf="@id/txt_project"
                android:hint="项目名称"
                android:inputType="text|textPersonName"
                android:paddingRight="50dp"
                android:maxLength="20" />

            <ImageButton
                android:id="@+id/open_arrow_btn"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_alignBottom="@id/enrol_project_name"
                android:layout_alignRight="@id/enrol_project_name"
                android:layout_alignTop="@id/enrol_project_name"
                android:layout_marginRight="2dp"
                android:background="@drawable/open_arrow" />
            
        </RelativeLayout>

2.创建新的布局文件 proname_spinner.xml  下拉列表的ListView

<?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:orientation="vertical" 
    android:gravity="center_horizontal"
    android:background="@color/popwin_bg">

    <ListView
        android:id="@+id/proname_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:cacheColorHint="#00000000"
        android:divider="#508a88"
        android:dividerHeight="1dp">
    </ListView>

</LinearLayout>

3.创建列表项布局文件 proname_spinner_item.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="wrap_content"
    android:orientation="horizontal">
    
    <ImageView 
        android:id="@+id/item_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/pro_icon"
        android:layout_marginLeft="5dp"
        android:minHeight="40dp"/>

    <TextView
        android:id="@+id/item_val"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginLeft="15dp"
        android:layout_weight="1"
        android:textColor="#4f5555"
        android:textSize="20sp" 
        android:singleLine="true"
        android:ellipsize="marquee"/>

</LinearLayout>

4.创建数据适配器文件 PopupAdapter.java

package com.photo.adapter;

import java.util.ArrayList;

import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.photo.activity.R;

/**
 * @description 工程名称 带下拉选择的可编辑输入框,PopupWindow的数据适配器
 * 
 * @author Li Junchao
 * @date 2014年5月9日
 */
public class PopupAdapter extends BaseAdapter
{
	
	private Context context;
	private ArrayList<String> list = new ArrayList<String>();
	
	@SuppressWarnings("unused")
	private Handler handler = null;
	
	private LayoutInflater layoutInflater;
	
	public PopupAdapter()
	{
		
	}
	
	public PopupAdapter(Context context,ArrayList<String> list)
	{
		this.context = context;
		this.list = list;
	}
	
	public PopupAdapter(Context context,ArrayList<String> list,Handler handler)
	{
		this.context = context;
		this.list = list;
		this.handler = handler;
	}

	/* (non-Javadoc)
	 * @see android.widget.Adapter#getCount()
	 */
	@Override
	public int getCount()
	{
		return this.list != null ? list.size() : 0;
	}

	/* (non-Javadoc)
	 * @see android.widget.Adapter#getItem(int)
	 */
	@Override
	public Object getItem(int position)
	{
		return list.get(position);
	}

	/* (non-Javadoc)
	 * @see android.widget.Adapter#getItemId(int)
	 */
	@Override
	public long getItemId(int position)
	{
		return position;
	}

	/* (non-Javadoc)
	 * @see android.widget.Adapter#getView(int, android.view.View, android.view.ViewGroup)
	 */
	@Override
	public View getView(int position, View convertView, ViewGroup parent)
	{
		ViewHoler holder = null;
		
		if(null == convertView)
		{
			holder = new ViewHoler();
			
			layoutInflater = LayoutInflater.from(context);
			convertView = layoutInflater.inflate(R.layout.proname_spinner_item,null);
			
			holder.imgBtn = (ImageView)convertView.findViewById(R.id.item_icon);
			holder.txtView = (TextView)convertView.findViewById(R.id.item_val);
			
			//绑定每一列的数据对象在列表项上
			convertView.setTag(holder);
		}
		else
		{
			holder = (ViewHoler)convertView.getTag();
		}
		
		if(holder != null)
		{
			//给每个列表项指定一个Id标识符,这个标识符是一个确切的数字
			convertView.setId(position);
			
			//同时设置列表项中每个元素的标识符，都是本列表项在列表集合中的索引
			holder.setId(position);
			
			//从数据集合中取值显示列表文本
			holder.txtView.setText(list.get(position));
			
			//设置触摸事件  这里最好不要为每一个列表项绑定touch事件，可以为ListView绑定OnItemClickListener
//			holder.txtView.setOnTouchListener(new SelectedItemTouchListener(list,position,handler));
		}
		
		return convertView;
	}
	
	/**
	 * 列表项触摸事件
	 */
	public class SelectedItemTouchListener implements View.OnTouchListener
	{

		private ArrayList<String> list = new ArrayList<String>();
		private int position = 0;
		private Handler handler = null;
		
		public SelectedItemTouchListener()
		{
			
		}
		
		public SelectedItemTouchListener(ArrayList<String> list,int position,Handler handler)
		{
			this.list = list;
			this.position = position;
			this.handler = handler;
		}
		
		@Override
		public boolean onTouch(View v, MotionEvent event)
		{
			Message message = new Message();
			Bundle bundle = new Bundle();
			
//			if(event.getAction() == MotionEvent.ACTION_OUTSIDE)
//			{
//				message.what = 0;
//			}
//			else
//			{
				Log.d("listview item ontouch",list.get(position));
			
				bundle.putString("value",list.get(position));
				bundle.putInt("selectedIndex",position);
				
				message.setData(bundle);
				
				message.what = 1;
//			}
			
			
			//发送一个消息，在主界面里设置输入文本框的值
			this.handler.sendMessage(message);
			
			return true;
		}
		
	}

	/**
	 * @description 记录列表项数据，绑定数据对象到每一个列表项
	 * 
	 * @author Admin
	 * @date 2014年5月9日
	 */
	public class ViewHoler
	{
		private TextView txtView;
		private ImageView imgBtn;
		
		/**
		 * @description 列表项元素
		 *
		 * @param position
		 */
		public void setId(int position)
		{
			this.txtView.setId(position);
			this.imgBtn.setId(position);
		}

		public TextView getTxtView()
		{
			return txtView;
		}

		public void setTxtView(TextView txtView)
		{
			this.txtView = txtView;
		}

		public ImageView getImgBtn()
		{
			return imgBtn;
		}

		public void setImgBtn(ImageView imgBtn)
		{
			this.imgBtn = imgBtn;
		}
	}
}

5.在Activity里java代码片段

	
        PopupWindow ppwin = null;	//工程名下拉列表的Popupwindow
	ListView listView = null;
	ArrayList<String> proNames = new ArrayList<String>();
	PopupAdapter adapter = null;
	ImageButton arrowBtn = null;
	boolean isInit = false;

	@Override
	public void onWindowFocusChanged(boolean hasFocus)
	{
		super.onWindowFocusChanged(hasFocus);
		
		if(hasFocus)
		{
			//每次当前activity获得当前焦点都重新读取sd下已经创建的项目目录
			Log.d("onWindowFocusChanged","重新获取工程目录");
			getProjectNamesfromSD();
			
			if(adapter != null && !adapter.isEmpty())
			{
				adapter.notifyDataSetChanged();
			}
		}
		
		while(!isInit)
		{
			Log.d("EnrolmentActivity.onWindowFocusChanged","初始化popupwindow");
			initPopupWindow();
			isInit = true;
		}
	}

/**
	 * @description 从sd卡上读取项目名称，返回项目名称数据列表集合
	 *
	 * @return
	 */
	private void getProjectNamesfromSD()
	{
		proNames.clear();
		
		//如果SD卡当前是已安装和准备好读写的状态
		if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
		{
			File projectDir = new File(Environment.getExternalStorageDirectory(),"photepro");
			
			//如果工程文件目录存在
			if(projectDir.exists() && projectDir.isDirectory())
			{
				String[] _filesName = projectDir.list();
				
				for(String name : _filesName)
				{
					if(!"tmp".equals(name))
					{
						proNames.add(name);
					}
					
				}
			}
		}
	}

	/**
	 * @description 初始化PopupWindow
	 *
	 */
	private void initPopupWindow()
	{
//		handler = new PopupHandler(this);
		
		//项目名称下拉列表控件 下拉按钮
		arrowBtn = (ImageButton)findViewById(R.id.open_arrow_btn);
		
		arrowBtn.setOnClickListener(arrowBtnClick);
		
		View view = (View)this.getLayoutInflater().inflate(R.layout.proname_spinner,null);
		this.listView = (ListView)view.findViewById(R.id.proname_list);
		this.adapter = new PopupAdapter(EnrolmentActivity.this,proNames);
		
		listView.setAdapter(adapter);
		
		listView.setOnItemClickListener(pronameItemClick);
		
		ppwin = new PopupWindow(view,project.getWidth(),LayoutParams.WRAP_CONTENT);
		ColorDrawable cd = new ColorDrawable(-0000);
		ppwin.setBackgroundDrawable(cd);
		ppwin.setOutsideTouchable(true);
		ppwin.setTouchable(true);
		ppwin.setFocusable(true);
		ppwin.setTouchInterceptor(new View.OnTouchListener()
		{
			
			@Override
			public boolean onTouch(View v, MotionEvent event)
			{
				//如果点击了popwindow之外的地方
				if(event.getAction() == MotionEvent.ACTION_OUTSIDE)
				{
					ppwin.dismiss();
					return true;
				}
				return false;
			}
		});
	}
	
	//工程名列表视图点选事件
	private AdapterView.OnItemClickListener pronameItemClick = new AdapterView.OnItemClickListener()
	{

		@Override
		public void onItemClick(AdapterView<?> parent, View view, int position, long id)
		{
			PopupAdapter.ViewHoler holder = (PopupAdapter.ViewHoler)view.getTag();
			project.setText(holder.getTxtView().getText());
			popupWinDismiss();
		}
		
	};
	
	/**
	 * @description 关闭popupwindow
	 *
	 */
	public void popupWinDismiss()
	{
		ppwin.dismiss();
	}
	
	/**
	 * @description 显示项目名称的popupwindow
	 *
	 */
	private void popwindowShowing()
	{
		ppwin.showAsDropDown(project);
	}

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