mBaseAdapter的二次封装(增加索引判断)
2017-02-23 17:54
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不多说!!!!附代码!!!
package mylib; import android.content.Context; import android.util.SparseArray; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import java.util.ArrayList; import java.util.List; /** * Created by 15331 on 2016/11/8. */ public abstract class MyBaseAdapter<T> extends android.widget.BaseAdapter { private List<T> list; private int selected = -1; //当前选中的item protected Context context; public MyBaseAdapter(Context context) { init(context, new ArrayList<T>()); } public MyBaseAdapter(Context context, List<T> list) { init(context, list); } private void init(Context context, List<T> list) { this.list = list; this.context = context; } public void selectItem(int i) { this.selected = i; notifyDataSetChanged(); } public int getSelected() { return selected; } public List<T> getList() { return list; } public void setList(List<T> list) { this.list = list; } public void clear() { this.list.clear(); notifyDataSetChanged(); } public void addAll(List<T> list) { if (list != null) { this.list.addAll(list); notifyDataSetChanged(); } } @Override public int getCount() { return list == null ? 0 : list.size(); } @Override public T getItem(int position) { return list.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { if (null == convertView) { convertView = inflate(getContentView()); } onInitView(convertView, position); return convertView; } /** 加载布局 */ 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 * 控件的id * @return 返回<T extends View> */ @SuppressWarnings("unchecked") protected <E extends View> E get(View view, int id) { SparseArray<View> viewHolder = (SparseArray<View>) view.getTag(); if (null == viewHolder) { viewHolder = new SparseArray<View>(); view.setTag(viewHolder); } View childView = viewHolder.get(id); if (null == childView) { childView = view.findViewById(id); viewHolder.put(id, childView); } return (E) childView; } }
adapter = new MyBaseAdapter<LYPrepaymentDetail>(getActivity(), list) { @Override public int getContentView() { return R.layout.zhichu_listviewitem; } @Override public void onInitView(View view, int position) { ly= (LinearLayout) view.findViewById(R.id.zhichu_item_ly); if (adapter.getSelected() == position) { ly.setBackgroundColor(getResources().getColor(R.color.blueone)); } else { ly.setBackgroundColor(getResources().getColor(R.color.white)); } } }; lv.setAdapter(adapter);
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