<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" > </ListView> </RelativeLayout>
package com.example.listviewdemo; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.List; import java.util.Map; import android.os.Bundle; import android.app.Activity; import android.util.Log; import android.view.Menu; import android.view.View; import android.widget.AbsListView; import android.widget.AbsListView.OnScrollListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.Toast; public class MainActivity extends Activity implements OnItemClickListener, OnScrollListener { private ListView listView; private SimpleAdapter simple_adapter; private List<Map<String, Object>> list; private int i=0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Æ¥Åä²¼¾ÖÎļþÖеÄListView¿Ø¼þ listView = (ListView) findViewById(R.id.listView); // Êý¾ÝÊÊÅäÆ÷µÄ¶¨Òå String[] data = new String[] { "java", "C++", "JavaScript", "Php", "Python" }; ArrayAdapter<String> adapter = new ArrayAdapter<String>( MainActivity.this, android.R.layout.simple_list_item_1, data); // ¸øListViewÉèÖÃÊý¾ÝÊÊÅäÆ÷ listView.setAdapter(adapter); // ÉèÖÃListViewµÄÔªËر»Ñ¡ÖÐʱµÄʼþ´¦Àí¼àÌýÆ÷ listView.setOnItemClickListener(this); // getData(); // ÉèÖÃSimpleAdapter¼àÌýÆ÷ // simple_adapter = new SimpleAdapter(MainActivity.this, // list, R.layout.list_item, // new String[] { "image", "text" }, new int[] { R.id.image, // R.id.text }); // listView.setAdapter(simple_adapter); // listView.setOnScrollListener(this); } // ¼ÓÔØSimpleAdapterÊý¾Ý¼¯ private List<Map<String, Object>> getData() { list = new ArrayList<Map<String, Object>>(); Map<String, Object> map = new HashMap<String, Object>(); map.put("text", "java"); map.put("image", R.drawable.ic_launcher); Map<String, Object> map2 = new HashMap<String, Object>(); map2.put("text", "C++"); map2.put("image", R.drawable.ic_launcher); Map<String, Object> map3 = new HashMap<String, Object>(); map3.put("text", "JavaScript"); map3.put("image", R.drawable.ic_launcher); Map<String, Object> map4 = new HashMap<String, Object>(); map4.put("text", "Php"); map4.put("image", R.drawable.ic_launcher); Map<String, Object> map5 = new HashMap<String, Object>(); map5.put("text", "Python2"); map5.put("image", R.drawable.ic_launcher); list.add(map); list.add(map2); list.add(map3); list.add(map4); list.add(map5); Log.i("Main", list.size() + ""); return list; } @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; } // (5)ʼþ´¦Àí¼àÌýÆ÷·½·¨ @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // TODO Auto-generated method stub // »ñÈ¡µã»÷ListView itemÖеÄÄÚÈÝÐÅÏ¢ String text = listView.getItemAtPosition(position) + ""; // µ¯³öToastÐÅÏ¢ÏÔʾµã»÷λÖúÍÄÚÈÝ Toast.makeText(MainActivity.this, "position=" + position + " content=" + text, 0).show(); } @Override public void onScrollStateChanged(AbsListView view, int scrollState) { // TODO Auto-generated method stub // ÊÖÖ¸À뿪ÆÁĻǰ£¬ÓÃÁ¦»¬ÁËһϠif (scrollState == SCROLL_STATE_FLING) { Toast.makeText(MainActivity.this, "ÓÃÁ¦»¬Ò»ÏÂ",0).show(); Map<String, Object> map = new HashMap<String, Object>(); map.put("text", "¹ö¶¯Ìí¼Ó "+i++); map.put("image", R.drawable.ic_launcher); list.add(map); listView.setAdapter(simple_adapter); simple_adapter.notifyDataSetChanged(); } else // Í£Ö¹¹ö¶¯ if (scrollState == SCROLL_STATE_IDLE) { } else // ÕýÔÚ¹ö¶¯ if (scrollState == SCROLL_STATE_TOUCH_SCROLL) { } } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { // TODO Auto-generated method stub } }
<?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:gravity="center_vertical" android:orientation="horizontal" > <ImageView android:id="@+id/image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" /> <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:textSize="25sp" /> </LinearLayout>
时间: 2024-11-05 10:43:57