我创建了一个用于在Android姜饼中的ListView中显示用户时间线的活动它工作正常但是当我在android 4设备上启动时，列表为空并且logcat输出为：
E/log_tag(5083): Error in parsing data org.json.JSONException: End of input at character 0 of
我已经发布了以下代码：
package nl.safan.e_app;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Locale;
import eu.erikw.PullToRefreshListView.OnRefreshListener;
import eu.erikw.PullToRefreshListView;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class TwitterParseHandler extends SherlockActivity {
ArrayList<TwitterFeed> arrayOfWebData = new ArrayList<TwitterFeed>();
class TwitterFeed {
public String text;
public String created_at;
}
FancyAdapter aa=null;
static ArrayList<String> resultRow;
private PullToRefreshListView listView;
public void onCreate(Bundle savedInstanceState) {
try
{
setTheme(TabActivity.THEME);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_twitter_parse_handler);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
String result = "";
try
{
HttpClient httpclient = new DefaultHttpClient();
HttpGet httppost = new HttpGet("https://api.twitter.com/1/statuses/user_timeline.json?include_entities=true&include_rts=true&screen_name=safanbv&count=20&exclude_replies=True&lang=en");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
InputStream webs = entity.getContent();
try
{
BufferedReader reader = new BufferedReader(new InputStreamReader(webs, "iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "/n");
}
webs.close();
result=sb.toString();
}catch(Exception e){
Log.e("log_tag", "Error in converting result "+e.toString());
}
}catch(Exception e){
Log.e("log_tag", "Error in http connection "+e.toString());
}
try
{
JSONArray jArray = new JSONArray(result);
for (int i=0;i<jArray.length();i++)
{
JSONObject json_data = jArray.getJSONObject(i);
TwitterFeed resultRow = new TwitterFeed();
String date = json_data.getString("created_at");
final String TWITTER="EEE MMM dd HH:mm:ss ZZZZZ yyyy";
SimpleDateFormat sf = new SimpleDateFormat(TWITTER,Locale.ENGLISH);
sf.setLenient(true);
Date created_at = sf.parse(date);
resultRow.text = json_data.getString("text");
resultRow.created_at = DateFormat.getDateInstance().format(created_at);;
arrayOfWebData.add(resultRow);
}
}catch(JSONException e){
Log.e("log_tag", "Error in parsing data "+e.toString());
}
ListView myListView = (ListView)findViewById(R.id.list);
aa=new FancyAdapter();
myListView.setAdapter(aa);
listView = (PullToRefreshListView)findViewById(R.id.list);
listView.setOnRefreshListener(new OnRefreshListener() {
@Override
public void onRefresh() {
listView.postDelayed(new Runnable() {
@Override
public void run() {
String result = "";
try
{
HttpClient httpclient = new DefaultHttpClient();
HttpGet httppost = new HttpGet("https://api.twitter.com/1/statuses/user_timeline.json?include_entities=true&include_rts=true&screen_name=safanbv&count=20&exclude_replies=True");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
InputStream webs = entity.getContent();
try
{
BufferedReader reader = new BufferedReader(new InputStreamReader(webs, "iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "/n");
}
webs.close();
result=sb.toString();
}catch(Exception e){
Log.e("log_tag", "Error in converting result "+e.toString());
}
}catch(Exception e){
Log.e("log_tag", "Error in http connection "+e.toString());
}
try
{
JSONArray jArray = new JSONArray(result);
for (int i=0;i<jArray.length();i++)
{
JSONObject json_data = jArray.getJSONObject(i);
TwitterFeed resultRow = new TwitterFeed();
String date = json_data.getString("created_at");
final String TWITTER="EEE MMM dd HH:mm:ss ZZZZZ yyyy";
SimpleDateFormat sf = new SimpleDateFormat(TWITTER,Locale.ENGLISH);
sf.setLenient(true);
Date created_at = sf.parse(date);
resultRow.text = json_data.getString("text");
resultRow.created_at = DateFormat.getDateInstance().format(created_at);;
arrayOfWebData.add(resultRow);
}
}catch(JSONException e){
Log.e("log_tag", "Error in parsing data "+e.toString());
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
listView.onRefreshComplete();
}
}, 2000);
}
});
}
catch(Exception e){
Log.e("ERROR", "ERROR IN CODE: "+e.toString());
e.printStackTrace();
}
}
class FancyAdapter extends ArrayAdapter<TwitterFeed> {
FancyAdapter() {
super(TwitterParseHandler.this, android.R.layout.simple_list_item_1, arrayOfWebData);
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView==null) {
LayoutInflater inflater=getLayoutInflater();
convertView=inflater.inflate(R.layout.twitterlist, null);
holder=new ViewHolder(convertView);
convertView.setTag(holder);
}
else
{
holder=(ViewHolder)convertView.getTag();
}
holder.populateFrom(arrayOfWebData.get(position));
return(convertView);
}
}
class ViewHolder {
public TextView name=null;
public TextView birthday=null;
ViewHolder(View row) {
name=(TextView)row.findViewById(R.id.TwitterText);
birthday=(TextView)row.findViewById(R.id.TwitterDatum);
}
void populateFrom(TwitterFeed r) {
name.setText(r.text);
birthday.setText(r.created_at);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
/*menu.add("refresh")
.setIcon(R.drawable.ic_menu_refresh)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);*/
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case android.R.id.home:
finish();
return true;
case Menu.FIRST:
//examineJSONdata();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
我希望有人能找到问题所在。 提前谢谢！