ListView 与ContextMenu的关联管理

<span style="font-family: Arial, Helvetica, sans-serif;">package com.example.listview;</span>

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.provider.Contacts.People;
import android.support.v4.widget.SimpleCursorAdapter;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
    private ListView listView;
    int ItemSelectedId;
    List<String>list=new ArrayList<String>();
  
    String path="/sdcard/wifikey/wifikey.txt";//路径在此设置
    @Override
       protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        final Button bt=(Button)findViewById(R.id.bt);
        final Button bt2=(Button)findViewById(R.id.bt2);
        final TextView tv = (TextView)findViewById(R.id.tv);
       
      
        initListView();
        listView =(ListView)findViewById(R.id.lv);
        
       
        
       
      //由此网上为ListView的数组内容添加
        
        bt.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View arg0) {
				
				showListView();
					}
        	
        });
        bt2.setOnClickListener(new OnClickListener(){
        	public void onClick(View v){
        		Toast.makeText(MainActivity.this, "开发中……", Toast.LENGTH_SHORT).show();
        	}
        });
       
        registerForContextMenu(listView);
 
      
     
        listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {

		

			@Override
			public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
					int arg2, long arg3) {
				ItemSelectedId=arg2;
				return false;
			}
		});
       
        
        
    }
    

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
    ContextMenuInfo menuInfo) {

    super.onCreateContextMenu(menu, v, menuInfo);
    MenuInflater inflater=getMenuInflater();
    inflater.inflate(R.menu.menu, menu);
    }
    @Override
    public boolean onContextItemSelected(MenuItem item) {
     switch(item.getItemId()){
     case R.id.deleteTeam:
    	 removeItem(ItemSelectedId);
    	 showListView();
    	 Toast.makeText(MainActivity.this, "删除"+ItemSelectedId, Toast.LENGTH_SHORT).show();
    	 
    	// listView.setAdapter(adapter);
    	 
    	 break;
     case R.id.noteTeam:
    	 Toast.makeText(MainActivity.this, "备注", Toast.LENGTH_SHORT).show();
     return true;
     }
     return false;
    }
    public void removeItem(int i){
    	list.remove(i);
    	showListView();
    }
    public void showListView(){
    	
    	  ArrayAdapter<String>adapter=new ArrayAdapter<String>(this,
            	R.layout.list,list); 
    	  
    	listView.setAdapter(adapter);
    }
    public void initListView(){
     list.add("one");

     list.add("two");

        //去掉android
    }
}

<span style="font-size:24px;color:#ff0000;">今天通过写这个demo，又学到很多东西。</span>

<span style="font-size:24px;color:#ff0000;">例如变量，函数名起名非常重要。</span>

<span style="font-size:24px;color:#ff0000;">然后通过onItemLongClickListener()里面的第二个参数传给全局变量ItemSelectedId</span>

<span style="font-size:24px;color:#ff0000;">再通过contextmenu操作list数组的内容，实现ListView的动态管理。</span>