Android_listView_Listener

layout.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"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <ListView

        android:id="@+id/listview"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="@string/hello_world" />

</RelativeLayout>

main.java

package com.example.day08_listview_listener;

import java.util.ArrayList;

import java.util.List;

import android.os.Bundle;

import android.app.Activity;

import android.util.Log;

import android.view.Menu;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.AdapterView.OnItemLongClickListener;

import android.widget.BaseAdapter;

import android.widget.ListView;

import android.widget.TextView;

public class MainActivity extends Activity {

    private ListView listView;

    public static String[] citys = {"长沙","上海","深圳","广州","北京","广东","杭州","北京","天津","嘉兴","永州","衡阳","西安"};

    private List<String> list;

    private Myadapter adapter;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //实例化控件

        listView = (ListView) findViewById(R.id.listview);

        list = new ArrayList<String>();

        for (int i = 0; i < citys.length; i++) {

            list.add(citys[i]);

        }

        adapter = new Myadapter();

        //设置适配器

        listView.setAdapter(adapter);

        //设置item点击事件

        listView.setOnItemClickListener(new OnItemClickListener() {

            /**

             * 当点击适配器控件的item的时候调用

             *     AdapterView<?> parent,表示的是设置该适配器的适配器控件

             *  View view,表示的是被点击的item的view

             *  int position, 表示的是与被点击item的view的索引

             *  long id 表示id,该值与getItemId的返回值对应

             */

            @Override

            public void onItemClick(AdapterView<?> parent, View view,

                    int position, long id) {

                Log.i("MainActivity", "MainActivity--onItemClick--position"+position);

            }

        });

        //设置长按事件

        listView.setOnItemLongClickListener(new OnItemLongClickListener() {

            /**

             * 问题:当用户点击item的时间超过2s就会触发长按事件,如果同时设置了单击事件,会先触发长按,松开手时触发单击事件]

             * 返回值     false

             * 表示该方法不处理该事件(不消耗该事件),事件会交给其他的方法去处理

             *     返回值   true

             * 表示该方法消耗了该事件,该事件就不会交给其他的方法去调用

             */

            @Override

            public boolean onItemLongClick(AdapterView<?> parent, View view,

                    int position, long id) {

                //获取数据

                String dataArray = citys[position];//方法一

                String dataArray1 = (String) listView.getItemAtPosition(position);//方法二

                String dataArray2 = (String) adapter.getItem(position) ;//方法三

                String dataArray4 = (String) parent.getItemAtPosition(position);

                Log.i("MainActivity", "MainActivity--onItemLongClick--position"+position);

                return true;

            }

        });

    }

class Myadapter extends BaseAdapter{

    @Override

    public int getCount() {

        // TODO Auto-generated method stub

        return list.size();

    }

    @Override

    public Object getItem(int position) {

        // TODO Auto-generated method stub

        return list.get(position);

    }

    @Override

    public long getItemId(int position) {

        // TODO Auto-generated method stub

        return position;

    }

    3.实现getview

//             1.编写复杂样式的item布局

//             2.将xml文件转换成view

//             3.找到view中的控件

//             4.给控件设置值

//             5.返回view

            //第一种--获得布局加载器

            /*LayoutInflater layoutInflater   = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            View view = layoutInflater.inflate(R.layout.listview_item_city, null);*/

            //第二种

            /*LayoutInflater layoutInflater2 = LayoutInflater.from(MainActivity.this);

            View view = layoutInflater2.inflate(R.layout.listview_item_city, null);*/

            //第三种

//            LayoutInflater layoutInflater = MainActivity.this.getLayoutInflater();

//            View view = layoutInflater2.inflate(R.layout.listview_item_city, null);

            //第四种

            View view = View.inflate(MainActivity.this, R.layout.listview_item_city, null);

    @Override

    public View getView(int position, View convertView, ViewGroup parent) {

        //    创建一个TextView 对象,设置参数并返回view

        TextView textView = new TextView(MainActivity.this);

        textView.setText(list.get(position));

        textView.setTextSize(30);

        return textView;

    }

}

}