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   源码介绍

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package com.example.timelinetext.test;

import java.util.List;
import java.util.Map;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class TimelineAdapter extends BaseAdapter {

	private Context context;
	private List<Map<String, Object>> list;
	private LayoutInflater inflater;

	public TimelineAdapter(Context context, List<Map<String, Object>> list) {
		super();
		this.context = context;
		this.list = list;
	}

	@Override
	public int getCount() {

		return list.size();
	}

	@Override
	public Object getItem(int position) {
		return position;
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		ViewHolder viewHolder = null;
		if (convertView == null) {
			inflater = LayoutInflater.from(parent.getContext());
			convertView = inflater.inflate(R.layout.activity_main, null);
			viewHolder = new ViewHolder();
			viewHolder.year = (TextView) convertView.findViewById(R.id.year);
			viewHolder.month = (TextView) convertView.findViewById(R.id.month);
			viewHolder.title = (TextView) convertView.findViewById(R.id.title);
		} else {
			convertView = (View) convertView.getTag();
		}
		
		String yearStr = list.get(position).get("year").toString();
		String monthStr = list.get(position).get("month").toString();
		String titleStr = list.get(position).get("title").toString();
		
		
		/*if (yearStr == null) {
			yearStr = "#";
		}
		if (monthStr == null) {
			monthStr = "#";
		}
		if (titleStr == null) {
			titleStr = "#";
		}
		viewHolder.year.setText(yearStr);
		viewHolder.month.setText(monthStr);
		viewHolder.title.setText(titleStr);

		Log.i("tag", "~~~~tear~~~~"   yearStr);
		Log.i("tag", "~~~~month~~~~"   monthStr);
		Log.i("tag", "~~~~title~~~~"   titleStr);*/
		
		viewHolder.year.setText( list.get(position).get("year").toString());
		viewHolder.year.setText(list.get(position).get("month").toString());
		viewHolder.title.setText(list.get(position).get("title").toString());

		return convertView;
	}

	static class ViewHolder {
		public TextView year;
		public TextView month;
		public TextView title;
	}
}