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一个抽象类继承BaseAdapter

package com.lei.adapter;

import java.util.ArrayList;

import java.util.List;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

public abstract class MyBaseAdapter extends android.widget.BaseAdapter {

private List data = new ArrayList();

private Context context;

private int layoutId;

public MyBaseAdapter(Context context, int layoutId, List datas) {

this(context, layoutId);

this.data = datas;

}

public MyBaseAdapter(Context context, int layoutId) {

this.context = context;

this.layoutId = layoutId;

}

public int getCount() {

return data.size();

}

public T getItem(int position) {

return data.get(position);

}

public long getItemId(int position) {

return position;

}

public View getView(int position, View convertView, ViewGroup parent) {

ViewHolder holder = ViewHolder.newInstance(context, convertView,

layoutId, parent, position);

setViewDetails(holder, getItem(position));

return holder.getConvertView();

}

//要实现的抽象方法，具体为控件赋值

public abstract void setViewDetails(ViewHolder holder, T data);

}

ViewHolder

根据自己需求，增加一些方法

package com.lei.adapter;

import android.content.Context;

import android.graphics.Bitmap;

import android.util.SparseArray;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import android.widget.TextView;

public class ViewHolder {

private View mContentView;

private SparseArray mViews;// 装控件

private int mPosition;

private Context context;

public static ViewHolder newInstance(Context context, View convertView,

int layoutId, ViewGroup group, int position) {

ViewHolder holder = null;

if (convertView == null) {

holder = new ViewHolder(context, layoutId, group, position);

} else {

holder = (ViewHolder) convertView.getTag();

holder.mPosition = position;

}

return holder;

}

private ViewHolder(Context context, int layoutId, ViewGroup group,

int position) {

this.context = context;

mViews = new SparseArray();

this.mPosition = position;

mContentView = LayoutInflater.from(context).inflate(layoutId, group,

false);

mContentView.setTag(this);

}

public T getViewById(int resId) {

View view = mViews.get(resId);

if (null == view) {

view = mContentView.findViewById(resId);

mViews.put(resId, view);

}

return (T) view;

}

/**

* 为textview设置内容

*

* @param resId

* @param text

*/

public void setTextForTv(int resId, String text) {

TextView tv = getViewById(resId);

tv.setText(text);

}

/**

* 设置文字颜色

*

* @param resId

* @param colorId

*/

public void setTextColor(int resId, int colorId) {

TextView tv = getViewById(resId);

tv.setTextColor(colorId);

}

public void setImageResource(int resId, int imgId) {

ImageView img = getViewById(resId);

img.setImageResource(imgId);

}

public void setImageBitmap(int resId, Bitmap bitmap) {

ImageView img = getViewById(resId);

img.setImageBitmap(bitmap);

if (null != bitmap) {

bitmap.recycle();

}

}

public View getConvertView() {

return mContentView;

}

public int getPosition() {

return mPosition;

}

}

下面是一个Demo

package com.lei.vpdemo;

import java.util.ArrayList;

import java.util.List;

import android.app.ListActivity;

import android.content.Context;

import android.graphics.Color;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Toast;

import com.lei.adapter.MyBaseAdapter;

import com.lei.adapter.ViewHolder;

public class MyListAct extends ListActivity {

List mData;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

initData();

ListAdapter adapter = new ListAdapter(this,

android.R.layout.simple_list_item_multiple_choice, mData);

setListAdapter(adapter);

}

private void initData() {

mData = new ArrayList();

mData.add("JAVA");

mData.add("Android");

mData.add("浪潮之巅");

mData.add("疯狂讲义");

}//adapter 实现类，只需要实现它的抽象方法和构造函数public class ListAdapter extends MyBaseAdapter {

Context context;

public ListAdapter(Context context, int layoutId, List datas) {

super(context, layoutId, datas);

this.context = context;

}

// 回调，为item赋值

@Override

public void setViewDetails(ViewHolder holder, final String data) {

holder.setTextForTv(android.R.id.text1, data);

//通过个体position为item设置个性化

if (holder.getPosition() == 2) {

holder.setTextColor(android.R.id.text1, Color.GREEN);

}

if (holder.getPosition() == 3) {

holder.getViewById(android.R.id.text1).setOnClickListener(

new OnClickListener() {

public void onClick(View v) {

Toast.makeText(context, data, Toast.LENGTH_LONG)

.show();

}

});

}

}

}

}

效果图如下：

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