【Android笔记】 通用ListView适配器

来自：http://blog.csdn.net/lmj623565791/article/details/38902805 

研读使用后，此处做下笔记。

ViewHolder类有些简单修改：

1，TextView设置文字方法重构，可以传入Html格式数据；

2，ImageView设置网络图片使用Universal-Image-loader；

ViewHolder：

import com.nostra13.universalimageloader.core.DisplayImageOptions;import com.nostra13.universalimageloader.core.ImageLoader;import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;import com.nostra13.universalimageloader.core.assist.ImageScaleType;import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;import android.content.Context;import android.graphics.Bitmap;import android.text.Spanned;import android.util.SparseArray;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.TextView;/** * 通用viewholder *  * @author Administrator *  */public class ViewHolder {private SparseArray<View> mViews;private int mPosition;private View mConvertView;private ImageLoader imageLoader;private DisplayImageOptions options;private ImageLoaderConfiguration configuration;private Context context;private ViewHolder(Context context, ViewGroup parent, int layoutId,int position) {this.context = context;this.mPosition = position;this.mViews = new SparseArray<View>();this.mConvertView = LayoutInflater.from(context).inflate(layoutId,parent, false);mConvertView.setTag(this);}/** * 拿到viewholder； *  * @param context * @param convertView * @param parent * @param layoutId * @param position * @return */public static ViewHolder getHolder(Context context, View convertView,ViewGroup parent, int layoutId, int position) {if (convertView == null) {return new ViewHolder(context, parent, layoutId, position);}return (ViewHolder) convertView.getTag();}public View getConvertView() {return mConvertView;}/** * 通过控件的ID获取对应的控件，如果没有，则加入views *  * @param viewId * @return */public <T extends View> T getView(int viewId) {View view = mViews.get(viewId);if (view == null) {view = mConvertView.findViewById(viewId);mViews.put(viewId, view);}return (T) view;}/** * 为adapter的item设置text *  * @param viewId * @param text * @return */public ViewHolder setText(int viewId, String text) {TextView view = (TextView) getView(viewId);view.setText(text);return this;}/** * 为adapter的item设置html格式的text *  * @param viewId * @param text * @return */public ViewHolder setText(int viewId, Spanned text) {TextView view = (TextView) getView(viewId);view.setText(text);return this;}/** * 设置本地资源图片 *  * @param viewId * @param drawableId * @return */public ViewHolder setImageResource(int viewId, int drawableId) {ImageView view = (ImageView) getView(viewId);view.setImageResource(drawableId);return this;}/** * 设置drawable *  * @param viewId * @param bm * @return */public ViewHolder setImageBitmap(int viewId, Bitmap bm) {ImageView view = (ImageView) getView(viewId);view.setImageBitmap(bm);return this;}/** * 设置网络图片资源 *  * @param viewId * @param url *            图片地址 * @param drawableId *            图片加载失败时的默认图片 * @return */public ViewHolder setImageByUrl(int viewId, String url, int drawableId) {ImageView view = (ImageView) getView(viewId);configuration = new ImageLoaderConfiguration.Builder(context).build();options = new DisplayImageOptions.Builder().showStubImage(drawableId).showImageOnFail(drawableId).imageScaleType(ImageScaleType.EXACTLY).showImageForEmptyUri(drawableId).cacheInMemory(true).cacheOnDisc(true).displayer(new FadeInBitmapDisplayer(300)).build();imageLoader = ImageLoader.getInstance();imageLoader.init(configuration);imageLoader.displayImage(url, view, options);return this;}public int getPosition() {return mPosition;}}

CommonAdapter：

import java.util.List;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;/** * 通用adapter *  * @author Administrator *  */public abstract class CommonAdapter<T> extends BaseAdapter {protected LayoutInflater mInflater;protected Context mContext;protected List<T> mDatas;protected int mItemLayoutId;public CommonAdapter(Context mContext, List<T> mDatas, int mItemLayoutId) {this.mContext = mContext;this.mInflater = LayoutInflater.from(mContext);this.mDatas = mDatas;this.mItemLayoutId = mItemLayoutId;}@Overridepublic int getCount() {return mDatas.size();}@Overridepublic T getItem(int position) {return mDatas.get(position);}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {final ViewHolder viewHolder = getViewHolder(position, convertView,parent);convert(viewHolder, getItem(position));return viewHolder.getConvertView();}public abstract void convert(ViewHolder helper, T item);private ViewHolder getViewHolder(int position, View convertView,ViewGroup parent) {return ViewHolder.getHolder(mContext, convertView, parent,mItemLayoutId, position);}}

使用范例代码片段：

private void inflaterAccountList(List<AccountDetailBean> list) {CommonAdapter<AccountDetailBean> mAdapter = new CommonAdapter<AccountDetailBean>(this, list, R.layout.accountitem) {@Overridepublic void convert(ViewHolder helper, AccountDetailBean item) {String laiyuan = TextUtils.isEmpty(item.getSources()) ? item.getChanges() : item.getSources();String money = TextUtils.isEmpty(item.getIncome()) ? item.getChange_money() : item.getIncome();helper.setText(R.id.tv_title, "流  水  号：" + item.getId());if ("1".equals(item.getState())) {helper.setText(R.id.tv_account,Html.fromHtml(" 交易日期：" + item.getTime()+ "<BR/>收入来源：" + laiyuan + "<BR/>收入金额："+ "<font color='#e90101'>" + money+ "</font>元 "));} else {helper.setText(R.id.tv_account, "交易   交易  ");helper.setText(R.id.tv_account,Html.fromHtml(" 交易日期：" + item.getTime()+ "<BR/>支出来源：" + laiyuan + "<BR/>支出金额："+ "<font color='#2E618D'>" + money+ "</font>元 "));}}};xlistview.setAdapter(mAdapter);mAdapter.notifyDataSetChanged();}