Android学习笔记-ListView

最新推荐文章于 2025-09-12 17:34:15 发布

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原文链接：http://www.cnblogs.com/Jesuca/archive/2011/11/06/2238469.html

文章标签：

#移动开发 #数据库

本文深入探讨了Android开发中ListView组件的实现原理及应用技巧，包括如何从联系人数据库查询并展示联系人的姓名与电话号码，以及ListView的交互事件处理。通过实例代码展示，帮助开发者更好地理解和掌握ListView的使用。

Android学习笔记-ListView

package org.ben.test;

import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.graphics.Color;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.PhoneLookup;
import android.view.View;
import android.widget.AdapterView;
import android.widget.LinearLayout;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;

public class AndroidTest_ListViewActivity extends Activity {

//LinearLayout是ListView的容器
    LinearLayout m_LinearLayout;
    ListView m_ListView;

/** Called when the activity is first created. */
    @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
//创建LinearLayout布局对象
        m_LinearLayout = new LinearLayout(this);
        m_LinearLayout.setOrientation(LinearLayout.VERTICAL);
        m_LinearLayout.setBackgroundColor(android.graphics.Color.BLACK);
        m_ListView = new ListView(this);
        LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,
                LinearLayout.LayoutParams.WRAP_CONTENT);
        m_ListView.setBackgroundColor(Color.BLACK);

        m_LinearLayout.addView(m_ListView,param);

        setContentView(m_LinearLayout);

        ContentResolver cr = getContentResolver();
//       String str1="" ;
//        String str2="" ;
        Cursor cursor = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null,null);
//        startManagingCursor(cursor);
//        
//        while(cursor.moveToNext())
//        {
//            int nameFieldColumnIndex = cursor.getColumnIndex(PhoneLookup.DISPLAY_NAME);
//            String name = cursor.getString(nameFieldColumnIndex);
//            str1+=name;
//            
//            String contactId = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
//            
//            Cursor phone = cr.query(ContactsContract.CommonDaiangtaKinds.Phone.CONTENT_URI, null, 
//                    ContactsContract.CommonDataKinds.Phone.CONTACT_ID+"="+contactId, 
//                    null, null);
//            
//            while (phone.moveToNext())
//            {
//                String strPhoneNumber = phone.getString(phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
//                str2 += (":" + strPhoneNumber);
//            }
//            phone.close();
//        }
        


        ListAdapter adapter = new SimpleCursorAdapter(this,
                android.R.layout.simple_list_item_2,
                cursor,

//android2.0以后获取联系人号码都必须使用ContactsContract.CommonDataKinds.Phone.NUMBER


new String[]{ ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,ContactsContract.CommonDataKinds.Phone.NUMBER},
new int[] { android.R.id.text1, android.R.id.text2});

        m_ListView.setAdapter(adapter);

        m_ListView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener(){

public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
                DisplayToast("滚动到第"+Long.toString(arg0.getSelectedItemId())+"项");
            }

public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
//表示没有选中
            }         
        });

        m_ListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3)
            {
                DisplayToast("选中了第"+Integer.toString(arg2+1)+"项");
            }
        });       
    }

public void DisplayToast(String str)
    {
        Toast.makeText(this, str, Toast.LENGTH_SHORT).show();
    }
}