Android 入门到精通 （界面编程#3-ListView)

    在Android中ListView的使用较为复杂一点，也就是配置其Adapter，Adapter有几种，有ArrayAdapter,SimpleAdapter等，首先要生成一个ListView(当然可以使用ListActivity,此Activity整合了ListView)然后用Adapter来设定ListView的显示数据及布局方式，然后再来响应OnItemClick 事件，或者在ListActivity改写onListItemClick 响应事件函数。看如下代码演示了使用ListActivity：

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class Test extends ListActivity {
 @Override
 protected void onListItemClick(ListView l, View v, int position, long id) {
  // TODO Auto-generated method stub
  super.onListItemClick(l, v, position, id);
  this.setTitle(this.mModelData.get(position).get("type").toString());
 }
 SimpleAdapter adapter = null;
 private ArrayList<Map<String, Object>> mModelData = null;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initModelData();
        adapter = new SimpleAdapter(this, mModelData, android.R.layout.two_line_list_item, new String[]{"name"}, new int[]{android.R.id.text1});
        this.setListAdapter(adapter);
        //setContentView(R.layout.main);
    }
    public void initModelData()
    {
     mModelData = new ArrayList<Map<String, Object>>();
     Map<String, Object> item = new HashMap<String,Object>();
     item.put("name", "Linux");item.put("type", "OS");
     mModelData.add(item);
     Map<String, Object> item2 = new HashMap<String,Object>();
     item2.put("name", "Android");item2.put("type", "Platform");
     mModelData.add(item2);
     Map<String, Object> item3 = new HashMap<String,Object>();
     item3.put("name", "Tomato");item3.put("type", "Fruit");
     mModelData.add(item3);
     
    }
}

下面代码显示了，使用ListView + Activity：

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;

public class TestStringList extends Activity implements OnItemClickListener {
    @Override
 public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
  this.setTitle("You Click Item:" + String.valueOf(arg2));  
 }
 private ListView mListView = null;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  mListView = new ListView(this);
  mListView.setOnItemClickListener(this);
  ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_checked,
    new String[]{"ItemA", "ItemB", "ItemC"});
  mListView.setAdapter(adapter);
  this.setContentView(mListView);
 }

}