class MyAdapter extends BaseAdapter{
private List list;
private Context context;
public MyAdapter(Context context,Listlist){
this.context = context;
this.list= list;
}
@Override
public int getCount() {
returnlist != null ? list.size() : 0;
}
@Override
public Object getItem(int position) {
returnlist.get(position);
}
@Override
public long getItemId(int position) {
returnposition;
}
@Override
public int getItemViewType(int position) {
//奇数：左边是图片、右边是文字 偶数：上边是图片，下边是文字
if(position %2 == 0){//判断是否是偶数
return 0;
}else{
return 1;
}
}
@Override
public int getViewTypeCount() {
return2;
}
private void loadImage(String url, finalImageView ivIcon){
newAsyncTask(){
@Override
protected voidonPostExecute(Bitmap bitmap) {
super.onPostExecute(bitmap);
if(bitmap == null)
{
ivIcon.setImageResource(R.mipmap.ic_launcher);
}else{
ivIcon.setImageBitmap(bitmap);
}
}
@Override
protected BitmapdoInBackground(String... params) {
try {
URL url =new URL(params[0]);
//打开网址
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
//提交方式
connection.setRequestMethod("GET");
connection.setConnectTimeout(5000);
connection.setReadTimeout(5000);
int code =connection.getResponseCode();
if(code ==200){
InputStream is =connection.getInputStream();
Bitmap bitmap =BitmapFactory.decodeStream(is);
return bitmap;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}.execute(url);
}
@Override
public View getView(int position, ViewconvertView, ViewGroup parent) {
//得到View加载布局类型
int type =getItemViewType(position);
ViewHolderviewHolder = null;
ViewHolder2 viewHolder2 = null;
switch(type){
case 1:
{
if(convertView == null){
viewHolder= new ViewHolder();
//找到控件
convertView =convertView.inflate(MainActivity.this,R.layout.item,null);
viewHolder.tvContent = (TextView)convertView.findViewById(R.id.tvContent);
viewHolder.ivIcon1 = (ImageView)convertView.findViewById(R.id.ivIcon1);
convertView.setTag(viewHolder);
}else{
viewHolder= (ViewHolder) convertView.getTag();
}
}
break;
case 0:
{
if(convertView == null){
viewHolder2 = new ViewHolder2();
//找到控件
convertView =convertView.inflate(MainActivity.this,R.layout.item2,null);
viewHolder2.tvContent = (TextView)convertView.findViewById(R.id.tvContent);
viewHolder2.ivIcon2 = (ImageView)convertView.findViewById(R.id.ivIcon2);
convertView.setTag(viewHolder2);
}else{
viewHolder2 = (ViewHolder2) convertView.getTag();
}
}
break;
}
switch(type){
case 0:
{ //为控件赋值
loadImage(list.get(position).getImg(),viewHolder2.ivIcon2);
viewHolder2.tvContent.setText(list.get(position).getTitle());
}
break;
case 1:
{ //为控件赋值
loadImage(list.get(position).getImg(),viewHolder.ivIcon1);
viewHolder.tvContent.setText(list.get(position).getTitle());
}
break;
}
returnconvertView;
}
//ViewHolder类
class ViewHolder{
TextViewtvContent;
ImageViewivIcon1;
}
class ViewHolder2{
TextViewtvContent;
ImageViewivIcon2;
}
