//优化
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Holer holer;
if (convertView == null){
convertView = View.inflate(context,R.layout.item,null);
holer = new Holer();
holer.textView = convertView.findViewById(R.id.ftext1);
holer.imageView = convertView.findViewById(R.id.iv1);
convertView.setTag(holer);
}else{
holer = (Holer) convertView.getTag();
}
holer.textView.setText(list.get(position).getNews_summary());
new MyBitMapAsyncTask(holer.imageView).execute(list.get(position).getPic_url());
return convertView;
}//Myapp要写在oncreate
ImageLoaderConfiguration build = new ImageLoaderConfiguration.Builder(MyApp.this).build();
ImageLoader instance = ImageLoader.getInstance();
instance.init(build);//创键new MyAsynTask().execute(urlString);
new MyAsynTask().execute(urlString);//class NetworkUtils {
public static String getJson(String string) {
try {
URL url = new URL(string);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
int responseCode = urlConnection.getResponseCode();
while (responseCode == 200){
InputStream inputStream = urlConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder stringBuilder = new StringBuilder();
String temp;
while ((temp = bufferedReader.readLine())!=null){
stringBuilder.append(temp);
}
return stringBuilder.toString();
}
} catch (Exception e) {
e.printStackTrace();
}
return "";
}//图片的
URL url = new URL(string);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
int responseCode = urlConnection.getResponseCode();
while (responseCode == 200){
InputStream inputStream = urlConnection.getInputStream();
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
return bitmap;
}//AsyncTask创建
private class MyAsynTask extends AsyncTask<String ,Void , String> {
@Override
protected String doInBackground(String... strings) {
String json = NetworkUtils.getJson(strings[0]);
return json;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
Gson gson = new Gson();
Bean bean = gson.fromJson(s, Bean.class);
ArrayList<Bean.DataBean> data = bean.getData();
list.addAll(data);
myAdapter.notifyDataSetChanged();
}
}private void GetGson() {
new Thread(new Runnable() {
@Override
public void run() {
String json = NetworkUtils.getJson(urlString);
Message message = handler.obtainMessage();
message.what = 1;
message.obj =json;
handler.sendMessage(message);
}
}).start();
}@SuppressLint("HandlerLeak")
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what ==1){
String json = (String) msg.obj;
Gson gson = new Gson();
Bean bean = gson.fromJson(json, Bean.class);
ArrayList<Bean.DataBean> data = bean.getData();
list.addAll(data);
myAdapter2.notifyDataSetChanged();;
}
}
};