package animtest.com.example.e531.week2_10month.Utils;
import android.os.AsyncTask;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
/**
* 使用AsyncTask+HttpURLConnection请求数据
* Created by e531 on 2017/10/12.
*/
public class MyTask extends AsyncTask<String,Void,String> {
private Icallbacks icallbacks;
private MyTask(){}
public MyTask(Icallbacks icallbacks) {
this.icallbacks = icallbacks;
}
@Override
protected String doInBackground(String... params) {
String str="";
try {
URL url=new URL(params[0]);
HttpURLConnection connection=(HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setReadTimeout(5000);
connection.setConnectTimeout(5000);
if(connection.getResponseCode()==200){
InputStream inputStream=connection.getInputStream();
str=StreamToString.streamToStr(inputStream,"utf-8");
}
} catch (MalformedURLException e) {
e.printStackTrace();
}catch (IOException e){
e.printStackTrace();
}
return str;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
icallbacks.updateUiByjson(s);
}
public interface Icallbacks{
/**
* 根据回传的json字符串,解析并更新页面组件
* @param jsonstr
*/
void updateUiByjson(String jsonstr);
}
}
StreamtoString