Android：监听ListView

时间：2023-03-09 13:39:32
Android：监听ListView

本文目录

监听ListView点击事件

使用监听器OnItemClickListener

package com.example.testsend;

import android.app.Activity;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.ListView;

public class MainActivity extends Activity{

    private ArrayAdapter<String> arr_adapt;

    private ListView list;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.list);

        list =(ListView)findViewById(R.id.list);

        String[] arr_data = {"数据1","数据2","数据3"};

        arr_adapt =new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, arr_data);

        list.setAdapter(arr_adapt);

        ListClickListener l = new ListClickListener();

        list.setOnItemClickListener(l);

    }    

    //监听类

    class ListClickListener implements OnItemClickListener{

        @Override

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

                long id) {

            // TODO Auto-generated method stub

            String text = list.getItemAtPosition(position)+"";

            Log.i("tag",text);

        }

    }

}

Android：监听ListView

监听ListView滚动事件

使用监听器ListScrollListener

package com.example.testsend;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import android.app.Activity;

import android.os.Bundle;

import android.util.Log;

import android.widget.AbsListView;

import android.widget.AbsListView.OnScrollListener;

import android.widget.ListView;

import android.widget.SimpleAdapter;

public class MainActivity extends Activity{

    private ListView list;

    private SimpleAdapter sim_adapter;

    private List<Map<String, Object>>dataList;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.list);

        list =(ListView)findViewById(R.id.list);

    //填充数据

        dataList = new ArrayList<Map<String,Object>>();

        for(int i=0;i<20;i++){

            Map<String, Object>map = new HashMap<String,Object>();

            map.put("pic", R.drawable.ic_launcher);

            map.put("text","我的数据"+i);

            dataList.add(map);

        }

        sim_adapter = new SimpleAdapter(this, dataList, R.layout.item,new String[]{"pic","text"},new int[]{R.id.pic,R.id.text});

        list.setAdapter(sim_adapter);

        //监听

        ListScrollListener l = new ListScrollListener();

        list.setOnScrollListener(l);

    }    

    //监听类

    class ListScrollListener implements OnScrollListener{

        @Override

        public void onScrollStateChanged(AbsListView view, int scrollState) {

            // TODO Auto-generated method stub

            //每一条数据都是一个Map

            switch(scrollState){

            case SCROLL_STATE_FLING:

            Log.i("Main","用户在手指离开屏幕之前，由于滑了一下，视图仍然依靠惯性继续滑动");

            //添加一条数据

             Map<String, Object>map = new HashMap<String,Object>();

             map.put("pic", R.drawable.ic_launcher);

             map.put("text","新的在这里啊！");

             dataList.add(map);

            //刷新

             sim_adapter.notifyDataSetChanged();

            break;

            case SCROLL_STATE_IDLE:

            Log.i("Main", "视图已经停止滑动");

            break;

            case SCROLL_STATE_TOUCH_SCROLL:

            Log.i("Main","手指没有离开屏幕，视图正在滑动");

            break;

            }

        }

        @Override

        public void onScroll(AbsListView view, int firstVisibleItem,

                int visibleItemCount, int totalItemCount) {

            // TODO Auto-generated method stub手指跟屏幕接触就触发

            Log.i("onscroll", "测试");

        }

    }

}

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="match_parent"

    android:orientation="horizontal"

    >

<ImageView

    android:id="@+id/pic"

    android:layout_marginLeft="6dp"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:src="@drawable/ic_launcher"

    />

<TextView

    android:id="@+id/text"

    android:layout_width="match_parent"

    android:layout_height="50dp"

    android:gravity="center_vertical"

    android:text="文字"

    />

</LinearLayout>

Android：监听ListView

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