android:drawableLeft="@drawable/dot_focus" drawable属性
ViewHolderholder=null;
if(convertView == null) {
holder=new ViewHolder();
convertView=View.inflate(MainActivity.this, R.layout.item, null);
holder.tv= (TextView) convertView.findViewById(R.id.tv);
convertView.setTag(holder);
}else{
holder=(ViewHolder) convertView.getTag();
}
holder.tv.setText(lists.get(position));
returnconvertView;
Dimens 适配 ,1920*1080px 3
1280*7202 800*480 1.5
Addheader("name","value");
Addbodyparameters("file",newFile());