android BaseAdapter 自定义适配器 BaseAdapter基类抽取 一
16lz
2022-07-26
android BaseAdapter 自定义适配器 BaseAdapter基类抽取 一
适配器基类
package com.zcycjy.mobile.adapter;import java.util.List;import android.content.Context;import android.util.SparseArray;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;public abstract class UAdapter extends BaseAdapter {private Context context;private List<?> list;public UAdapter(Context context, List<?> list) {this.context = context;this.list = list;}@Overridepublic int getCount() {return list == null ? 0 : list.size();}@Overridepublic Object getItem(int position) {return list.get(position);}@Overridepublic long getItemId(int position) {return position;}/** * 布局资源 * @return */protected abstract int setLayoutRes();/** * 重写getView方法 * @param position * @param convertView * @param parent * @param holder * @return */protected abstract View getView(int position, View convertView,ViewGroup parent, ViewHolder holder);/** * 每个控件的缓存 */protected class ViewHolder {public SparseArray<View> view = new SparseArray<View>();/** * 指定resId和类型即可获取到相应的view * * @param convertView * @param resId * @param <T> * @return */public <T extends View> T obtainView(View convertView, int resId) {View v = view.get(resId);if (null == v) {v = convertView.findViewById(resId);view.put(resId, v);}return (T) v;}}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ViewHolder holder;if (null == convertView) {holder = new ViewHolder();convertView = LayoutInflater.from(context).inflate(setLayoutRes(),null);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}return getView(position, convertView, parent, holder);}} 继承积累UAdapter
package com.zcycjy.mobile.adapter;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import com.zcycjy.mobile.R;import com.zcycjy.mobile.entity.Address;public class AddressAdapter extends UAdapter {List<Address> list = null;// Address 实体累public AddressAdapter(Context context, List<Address> list) {super(context, list);}public void refreshDatas(List<Address> list) {if (null != list) {this.list = list;notifyDataSetChanged();} else {this.list = new ArrayList<Address>();}}@Overrideprotected int setLayoutRes() {return R.layout.item_address;}@Overrideprotected View getView(int position, View convertView, ViewGroup parent,ViewHolder holder) {TextView tv = holder.obtainView(convertView, R.id.item_tv_name);Address ad = (Address) getItem(position);tv.setText(ad.getName());return convertView;}} 调用相信大家都会用，是不是感觉方便简单了点 更多相关文章
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