打上断点 出现Client not ready yet..???
请问如何出现老师的界面啊!
请问如何出现老师的界面啊!
2016-01-09
打上断点后出现后。输入Log.e("aa--ff","getJsonData");?????端口又出现问题了,请问怎么解决,谢谢
最主要的这一步怎么整体解决啊,谢谢啊!!!!
package com.yc.asynctask;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends Activity {
private ListView mListView;
private static String URL = "http://www.imooc.com/api/teacher?type=4&num=30";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mListView = (ListView) findViewById(R.id.lv_main);
new NewsAsyncTask().execute(URL);
}
private List<NewsBean> getJsonData(String url) {
List<NewsBean> newsBeanList = new ArrayList<>();
try {
String jsonString = readStream(new URL(url).openStream());
JSONObject jsonObject;
NewsBean newsBean;
try {
jsonObject = new JSONObject(jsonString);
JSONArray jsonArray = jsonObject.getJSONArray("data");
for(int i = 0; i <jsonArray.length(); i++){
jsonObject = jsonArray.getJSONObject(i);
newsBean = new NewsBean();
//从jsonObject中得到每个元素数据给newsBean
newsBean.newsIconUrl = jsonObject.getString("picSmall");
newsBean.newsTitle = jsonObject.getString("name");
newsBean.newsContent = jsonObject.getString("description");
newsBeanList.add(newsBean);
}
} catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
Log.e("aa--ff","getJsonData");
return newsBeanList;
}
private String readStream(InputStream is){
InputStreamReader isr;
String result = "";
try {
String line = "";
isr = new InputStreamReader(is, "utf-8");
// 字节流转化为字符流
BufferedReader br = new BufferedReader(isr);
while ((line = br.readLine()) != null){
result += line;
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
class NewsAsyncTask extends AsyncTask<String, Void, List<NewsBean>>{
@Override
protected List<NewsBean> doInBackground(String... params) {
return getJsonData(params[0]);
}
}
}
举报