Android 完美對BaseAdapter進行二次封裝

Android 完美對BaseAdapter進行二次封裝

在開發列表的介面的時候經常會重寫BaseAdapter,利用網上的知識點技巧，自己對它進行了二次封裝方便以後在項目中再次使用。使用起來方便得很。

當然如何你看了代碼可以的話，也可以對ExpandableListAdapter同樣的封裝！

使用自訂BaseAdapter：

package com.cyy.myandroid;import android.content.Context;import android.provider.ContactsContract.Data;import android.text.Spannable;import android.text.SpannableString;import android.text.style.ForegroundColorSpan;import android.view.View;import android.widget.TextView;public class RankingListAdapter extends BaseAdapter {public RankingListAdapter(Context context) {super(context);}@Overridepublic int getContentView() {//item布局return R.layout.activity_main_item;}@Overridepublic void onInitView(View view, int position) {TextView tvNumb = get(view, R.id.tv);  // 直接item布局裡的控制項Data data = getItem(position);tvNumb.setText(String.valueOf(position + 1));}}

自訂BaseAdapter：

package com.cyy.myandroid;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.util.SparseArray;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;public abstract class BaseAdapter extends android.widget.BaseAdapter {private List list;protected Context context;public BaseAdapter(Context context) {init(context, new ArrayList());}public BaseAdapter(Context context, List list) {init(context, list);}private void init(Context context, List list) {this.list = list;this.context = context;}public List getList() {return list;}public void setList(List list) {this.list = list;}public void clear() {this.list.clear();notifyDataSetChanged();}public void addAll(List list) {if (list != null) {this.list.addAll(list);notifyDataSetChanged();}}@Overridepublic int getCount() {return list == null ? 0 : list.size();}@Overridepublic T getItem(int position) {return list.get(position);}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {if (null == convertView) {convertView = inflate(getContentView());}onInitView(convertView, position);return convertView;}/** 載入布局 */private View inflate(int layoutResID) {LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);View view = layoutInflater.inflate(layoutResID, null);return view;}public abstract int getContentView();public abstract void onInitView(View view, int position);/** *  * @param view *            converView * @param id *            控制項的id * @return 返回 */@SuppressWarnings("unchecked")protected  E get(View view, int id) {SparseArray viewHolder = (SparseArray) view.getTag();if (null == viewHolder) {viewHolder = new SparseArray();view.setTag(viewHolder);}View childView = viewHolder.get(id);if (null == childView) {childView = view.findViewById(id);viewHolder.put(id, childView);}return (E) childView;}}