Android时间轴简单优化

改动getView()方法:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView==null){
holder = new ViewHolder();
convertView = LayoutInflater.from(context).inflate(R.layout.time_line_item,null,false);
convertView.setTag(holder);
}else {
holder = (ViewHolder) convertView.getTag();
}
holder.rightTexView = (TextView) convertView.findViewById(R.id.right_text);
holder.leftImage = (ImageView) convertView.findViewById(R.id.left_image);
TimeLine timeLine = timeLineList.get(position);
if (timeLine!=null){
holder.rightTexView.setText(timeLine.getText());
holder.leftImage.setImageResource(timeLine.getImageView());
//动态设置line的左边距
View lineTop = convertView.findViewById(R.id.line_top);
View bottom = convertView.findViewById(R.id.line_bottom);
LinearLayout.LayoutParams layoutParams =  (LinearLayout.LayoutParams) lineTop.getLayoutParams();
layoutParams.leftMargin = (holder.leftImage.getWidth())/2;
lineTop.setLayoutParams(layoutParams);
bottom.setLayoutParams(layoutParams);
//动态设置布局高度
LinearLayout linearLayout = (LinearLayout) convertView.findViewById(R.id.right_line);
int height = lineTop.getHeight()+bottom.getHeight()+ holder.leftImage.getHeight();
ViewGroup.LayoutParams lp =  linearLayout.getLayoutParams();
lp.height = height;
linearLayout.setLayoutParams(lp);**
}
return convertView;
}