Android(安卓)Adapter详解(2)

3:BaseAdapter
这种Adapter写起来最复杂，但是可以实现的功能却是最多的，比如说在某一个listview中加入button的监听事件等等，这也是必备的掌握技能

package com.example.arrayada;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.widget.ListView;import com.example.adapter.MyBaseAdapter;public class BaseActivity extends Activity{private ListView listview = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.base_main);listview = (ListView) findViewById(R.id.balist);listview.setAdapter(new MyBaseAdapter(this, getData()));}private List<HashMap<String, Object>> getData(){List<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();HashMap<String, Object> map = new HashMap<String,Object>();map.put("img", R.drawable.pkq);map.put("te1", "皮卡丘");map.put("te2", "能力五星");map.put("te3", "查询详细");list.add(map);map = new HashMap<String,Object>();map.put("img", R.drawable.jng);map.put("te1", "皮卡丘");map.put("te2", "皮卡丘");map.put("te3", "皮卡丘");list.add(map);map = new HashMap<String,Object>();map.put("img", R.drawable.xhl);map.put("te1", "皮卡丘");map.put("te2", "皮卡丘");map.put("te3", "皮卡丘");list.add(map);map = new HashMap<String,Object>();map.put("img", R.drawable.zz);map.put("te1", "皮卡丘");map.put("te2", "皮卡丘");map.put("te3", "皮卡丘");list.add(map);return list;}}

base_main.xml

<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:orientation="vertical"    tools:context=".MainActivity" >    <ListView        android:id="@+id/balist"        android:layout_width="match_parent"        android:layout_height="wrap_content"         android:layout_weight="1">    </ListView>        <Button        android:id="@+id/but3"         android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="baseadapter 的listview" /></LinearLayout>

base_list.xml

<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:orientation="horizontal"    tools:context=".MainActivity" >    <ImageView        android:id="@+id/img2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_weight="1"        android:src="@drawable/ic_launcher" />    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_weight="2"        android:orientation="vertical" >        <TextView            android:id="@+id/text1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textSize="23dp"            android:text="TextView" />        <TextView            android:id="@+id/text2"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="TextView" />    </LinearLayout>        <Button        android:id="@+id/base_but"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_weight="1"        android:text="Button" />    </LinearLayout>

package com.example.adapter;import java.util.HashMap;import java.util.List;import com.example.arrayada.R;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ImageView;import android.widget.TextView;public class MyBaseAdapter extends BaseAdapter{private Context c =null;private List<HashMap<String, Object>> list;private LayoutInflater myInflater = null;public MyBaseAdapter(Context context,List<HashMap<String, Object>> baselist) {c = context;list = baselist;System.out.println(list.size());}@Overridepublic int getCount() {return list.size();}@Overridepublic Object getItem(int arg0) {return arg0;}@Overridepublic long getItemId(int arg0) {return arg0;}@Overridepublic View getView(int arg0, View arg1, ViewGroup arg2) {BaseHolder baseHolder = new BaseHolder();if(arg1 == null){myInflater = LayoutInflater.from(c);arg1 = myInflater.inflate(R.layout.base_list, null);baseHolder.img = (ImageView) arg1.findViewById(R.id.img2);baseHolder.textview1 = (TextView) arg1.findViewById(R.id.text1);baseHolder.textview2 = (TextView) arg1.findViewById(R.id.text2);baseHolder.button1 = (Button) arg1.findViewById(R.id.base_but);arg1.setTag(baseHolder);}else{baseHolder = (BaseHolder) arg1.getTag();}baseHolder.img.setImageResource((Integer) list.get(arg0).get("img"));baseHolder.textview1.setText((String) list.get(arg0).get("te1"));baseHolder.textview2.setText((String) list.get(arg0).get("te2"));baseHolder.button1.setText((String) list.get(arg0).get("te3"));return arg1;}private class BaseHolder{ImageView img;TextView textview1;TextView textview2;Button button1;}}

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