SimpleAdapter和Baseadapter填充listActivity-android学习之旅()
2015-05-29 09:52
417 查看
简介
SimpleAdapter的功能是能够为AbsListView提供复杂的数据,需要构造ListView代码示例
package peng.liu.testview; import android.app.Activity; import android.os.Bundle; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; public class MainActivity extends Activity { ListView myList = null; String[] names = new String[]{ "hello","world", "hello","world" }; String[] desc = new String[]{ "java","c#","python","swift" }; private int[] imageIds = new int[]{R.drawable.ic_launcher,R.drawable.ic_launcher, R.drawable.ic_launcher,R.drawable.ic_launcher}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); List<Map<String,Object>> listItems = new ArrayList<Map<String, Object>>(); for (int i = 0;i<names.length;i++){ Map<String,Object> map = new HashMap<String, Object>(); map.put("header",imageIds[i]); map.put("name",names[i]); map.put("desc",desc[i]); listItems.add(map); } SimpleAdapter adapter = new SimpleAdapter(this,listItems,R.layout.simple_item,new String[]{ "name","desc","header" },new int[]{R.id.name,R.id.desc,R.id.header}); myList = (ListView) findViewById(R.id.myList); myList.setAdapter(adapter); } }
<LinearLayout 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:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity" android:orientation="vertical"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingLeft="10dp" android:id="@+id/header"/> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingLeft="10dp" android:textSize="20dp" android:background="#f0f" android:id="@+id/name"/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingLeft="10dp" android:textSize="14dp" android:id="@+id/desc"/> </LinearLayout> </LinearLayout>
监听事件
有两种方式:1.OnItemClickListener()
2.OnItemSelectorListener()
这两种方式都是基于AdapterView提供的。
BaseAdapter简介
使用BaseAdapter可以获得对Adapter的控制权,创建多少个列表项以及每个列表项的组件都可以在继承的复写方法里面定义。废话不多说,代码示例
package peng.liu.testview; import android.app.Activity; import android.graphics.Color; import android.os.Bundle; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); BaseAdapter adapter = new BaseAdapter() { @Override public int getCount() { return 40; } @Override public Object getItem(int i) { return null; } @Override public long getItemId(int i) { return i; } @Override public View getView(int i, View view, ViewGroup viewGroup) { LinearLayout line = new LinearLayout(MainActivity.this); line.setOrientation(LinearLayout.VERTICAL); ImageView image = new ImageView(MainActivity.this); image.setImageResource(R.drawable.ic_launcher); TextView text = new TextView(MainActivity.this); text.setTextSize(20); text.setTextColor(Color.RED); text.setText("第"+i+"个"); line.addView(image); line.addView(text); return line; } }; ListView myList = (ListView) findViewById(R.id.myList); myList.setAdapter(adapter); } }
相关文章推荐
- 使用C++实现JNI接口需要注意的事项
- Android IPC进程间通讯机制
- Android Manifest 用法
- [转载]Activity中ConfigChanges属性的用法
- Android之获取手机上的图片和视频缩略图thumbnails
- Android之使用Http协议实现文件上传功能
- Android学习笔记(二九):嵌入浏览器
- android string.xml文件中的整型和string型代替
- i-jetty环境搭配与编译
- android之定时器AlarmManager
- android wifi 无线调试
- Android Native 绘图方法
- Android java 与 javascript互访(相互调用)的方法例子
- android 代码实现控件之间的间距
- android FragmentPagerAdapter的“标准”配置
- Android"解决"onTouch和onClick的冲突问题
- android:installLocation简析
- android searchView的关闭事件
- SourceProvider.getJniDirectories