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   源码介绍

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package com.example.testpic;

import java.util.List;

import android.app.Activity;
import android.graphics.Bitmap;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.testpic.BitmapCache.ImageCallback;

public class ImageBucketAdapter extends BaseAdapter {
final String TAG = getClass().getSimpleName();

Activity act;
/**
* 图片集列表
*/
List<ImageBucket> dataList;
BitmapCache cache;
ImageCallback callback = new ImageCallback() {
@Override
public void imageLoad(ImageView imageView, Bitmap bitmap,
Object... params) {
if (imageView != null && bitmap != null) {
String url = (String) params[0];
if (url != null && url.equals((String) imageView.getTag())) {
((ImageView) imageView).setImageBitmap(bitmap);
} else {
Log.e(TAG, "callback, bmp not match");
}
} else {
Log.e(TAG, "callback, bmp null");
}
}
};

public ImageBucketAdapter(Activity act, List<ImageBucket> list) {
this.act = act;
dataList = list;
cache = new BitmapCache();
}

@Override
public int getCount() {
// TODO Auto-generated method stub
int count = 0;
if (dataList != null) {
count = dataList.size();
}
return count;
}

@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}

@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}

class Holder {
private ImageView iv;
private ImageView selected;
private TextView name;
private TextView count;
}

@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
Holder holder;
if (arg1 == null) {
holder = new Holder();
arg1 = View.inflate(act, R.layout.item_image_bucket, null);
holder.iv = (ImageView) arg1.findViewById(R.id.image);
holder.selected = (ImageView) arg1.findViewById(R.id.isselected);
holder.name = (TextView) arg1.findViewById(R.id.name);
holder.count = (TextView) arg1.findViewById(R.id.count);
arg1.setTag(holder);
} else {
holder = (Holder) arg1.getTag();
}
ImageBucket item = dataList.get(arg0);
holder.count.setText("" item.count);
holder.name.setText(item.bucketName);
holder.selected.setVisibility(View.GONE);
if (item.imageList != null && item.imageList.size() > 0) {
String thumbPath = item.imageList.get(0).thumbnailPath;
String sourcePath = item.imageList.get(0).imagePath;
holder.iv.setTag(sourcePath);
cache.displayBmp(holder.iv, thumbPath, sourcePath, callback);
} else {
holder.iv.setImageBitmap(null);
Log.e(TAG, "no images in bucket " item.bucketName);
}
return arg1;
}

}