package com.imooc.myapplication;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;
public class NotifyAdapter extends BaseAdapter {
private List<String> mData;
private LayoutInflater mInflater;
public NotifyAdapter(Context context, List<String> data) {
this.mData = data;
mInflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return mData.size();
}
@Override
public Object getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
// 判断是否缓存
if (convertView == null) {
holder = new ViewHolder();
// 通过LayoutInflater实例化布局
convertView = mInflater.inflate(R.layout.notify_item, null);
holder.img = (ImageView) convertView.findViewById(R.id.imageView);
holder.title = (TextView) convertView.findViewById(R.id.textView);
convertView.setTag(holder);
} else {
// 通过tag找到缓存的布局
holder = (ViewHolder) convertView.getTag();
}
// 设置布局中控件要显示的视图
holder.img.setBackgroundResource(R.drawable.ic_launcher);
holder.title.setText(mData.get(position));
return convertView;
}
public final class ViewHolder {
public ImageView img;
public TextView title;
}
}