Ederson dos Santos
Reputation: 105
Error only on the real device. Works on all emulators
I am making an application where it is presented a list of online radios in a listView, this list is obtained thru a MySql database online. I tested my application in all versions of emulators and it worked well. But in the device, the application terminates. When I connect via usb does not close the application, but does not load Json content.
With the device connected via usb debugging does not charge the radios
The log:
03-01 17:35:05.109: E/Buffer Error(2273): Error converting result java.lang.NullPointerException
03-01 17:35:05.109: E/JSON Parser(2273): Error parsing data org.json.JSONException: End of input at character 0 of
Below is the code:
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.http.NameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class ListaRadios extends ListActivity {
private ProgressDialog pDialog;
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> listaradios;
private static String url_radios = "Url to php mysql connection with";
private static final String TAG_SUCESSO = "sucesso";
private static final String TAG_RADIOS = "radios";
private static final String TAG_ID = "id";
private static final String TAG_NOME = "nome";
JSONArray radios = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.lista_radios);
listaradios = new ArrayList<HashMap<String, String>>();
new LoadAllRadios().execute();
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> parent, View view, int position, long id_item) {
String id = ((TextView) view.findViewById(R.id.id)).getText().toString();
Intent in = new Intent(getApplicationContext(), Player.class);
in.putExtra(TAG_ID, id);
startActivityForResult(in, 100);
}
});
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
private void direciona(Class<?> menu){
Intent myIntent = new Intent(this, menu);
startActivity(myIntent);
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.contato:
direciona(Contato.class);
return true;
case R.id.sugerir:
direciona(Sugerir.class);
return true;
case R.id.listar:
direciona(ListaRadios.class);
return true;
case R.id.player:
direciona(Player.class);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == 100) {
Intent intent = getIntent();
finish();
startActivity(intent);
}
}
class LoadAllRadios extends AsyncTask<String, String, String> {
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ListaRadios.this);
pDialog.setMessage("Buscando rádios. Aguarde...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... args) {
List<NameValuePair> params = new ArrayList<NameValuePair>();
JSONObject json = jParser.makeHttpRequest(url_radios, "GET", params);
Log.d("Todas as rádios: ", json.toString());
try {
// Checking for SUCCESS TAG
int sucesso = json.getInt(TAG_SUCESSO);
if (sucesso == 1) {
radios = json.getJSONArray(TAG_RADIOS);
for (int i = 0; i < radios.length(); i++) {
JSONObject c = radios.getJSONObject(i);
String id = c.getString(TAG_ID);
String nome = c.getString(TAG_NOME);
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_ID, id);
map.put(TAG_NOME, nome);
listaradios.add(map);
}
} else {
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
pDialog.dismiss();
runOnUiThread(new Runnable() {
public void run() {
ListAdapter adapter = new SimpleAdapter(ListaRadios.this,
listaradios, R.layout.lista_item_radios,
new String[] {TAG_ID, TAG_NOME},
new int[] {R.id.id, R.id.nome});
setListAdapter(adapter);
}
});
}
}
}
php code:
<?php
$resposta = array();
require_once 'db_connect.php';
$db = new DB_CONNECT();
$resultado = mysql_query("SELECT * FROM radios") or die(mysql_error());
if (mysql_num_rows($resultado) > 0) {
$resposta["radios"] = array();
while ($row = mysql_fetch_array($resultado)) {
$radio = array();
$radio["id"] = $row["id"];
$radio["nome"] = $row["nome"];
$radio["site"] = $row["site"];
$radio["imagem"] = $row["imagem"];
$radio["url_streaming"] = $row["url_streaming"];
array_push($resposta["radios"], $radio);
}
$resposta["sucesso"] = 1;
echo json_encode($resposta);
} else {
$resposta["sucesso"] = 0;
$resposta["mensagem"] = "Não foram encontradas rádios.";
echo json_encode($resposta);
}
?>
What can it be?
If I run the emulator the output of this is below:
03-01 18:41:40.047: D/Todas as rádios:(594): {"sucesso":1,"radios":[{"site":"www.radiomiriam.com.br","id":"1","url_streaming":"http:\/\/69.64.48.96:9880\/","nome":"Radio Miriam","imagem":""},{"site":"www.clarimdopampa.com.br","id":"2","url_streaming":"http:\/\/70.36.96.25:9928\/","nome":"Radio Clarim do Pampa","imagem":""},{"site":"","id":"5","url_streaming":"http:\/\/189.76.158.139:50004\/","nome":"Itapema FM - RS","imagem":""}]}
But if I run the usb debug output does not list this just this:
03-01 18:48:21.319: I/System.out(3717): Debugger has connected
03-01 18:48:21.319: I/System.out(3717): waiting for debugger to settle...
03-01 18:48:21.519: I/System.out(3717): waiting for debugger to settle...
03-01 18:48:21.719: I/System.out(3717): waiting for debugger to settle...
03-01 18:48:21.919: I/System.out(3717): waiting for debugger to settle...
03-01 18:48:22.119: I/System.out(3717): waiting for debugger to settle...
03-01 18:48:22.319: I/System.out(3717): waiting for debugger to settle...
03-01 18:48:22.519: I/System.out(3717): waiting for debugger to settle...
03-01 18:48:22.719: I/System.out(3717): waiting for debugger to settle...
03-01 18:48:22.919: I/System.out(3717): debugger has settled (1475)
03-01 18:48:23.699: W/System.err(3717): java.net.UnknownHostException: nsi.inf.br
03-01 18:48:23.709: W/System.err(3717): at java.net.InetAddress.lookupHostByName(InetAddress.java:508)
03-01 18:48:23.709: W/System.err(3717): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:296)
03-01 18:48:23.719: W/System.err(3717): at java.net.InetAddress.getAllByName(InetAddress.java:258)
03-01 18:48:23.719: W/System.err(3717): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:136)
03-01 18:48:23.719: W/System.err(3717): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
03-01 18:48:23.729: W/System.err(3717): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
03-01 18:48:23.739: W/System.err(3717): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:359)
03-01 18:48:23.739: W/System.err(3717): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
03-01 18:48:23.749: W/System.err(3717): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
03-01 18:48:23.749: W/System.err(3717): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
03-01 18:48:23.749: W/System.err(3717): at com.nsistations.JSONParser.makeHttpRequest(JSONParser.java:62)
03-01 18:48:23.749: W/System.err(3717): at com.nsistations.ListaRadios$LoadAllRadios.doInBackground(ListaRadios.java:120)
03-01 18:48:23.749: W/System.err(3717): at com.nsistations.ListaRadios$LoadAllRadios.doInBackground(ListaRadios.java:1)
03-01 18:48:23.749: W/System.err(3717): at android.os.AsyncTask$2.call(AsyncTask.java:185)
03-01 18:48:23.749: W/System.err(3717): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
03-01 18:48:23.749: W/System.err(3717): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
03-01 18:48:23.749: W/System.err(3717): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
03-01 18:48:23.759: W/System.err(3717): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
03-01 18:48:23.759: W/System.err(3717): at java.lang.Thread.run(Thread.java:1019)
03-01 18:48:23.759: E/Buffer Error(3717): Error converting result java.lang.NullPointerException
03-01 18:48:23.759: E/JSON Parser(3717): Error parsing data org.json.JSONException: End of input at character 0 of
Upvotes: 1
Views: 1119
Answers (1)
ivan.aguirre
Reputation: 510
java.net.UnknownHostException: nsi.inf.br
Your device can't reach nsi.inf.br but the emulator, i.e. your workstation, can.
Check device's connectivity settings agains your workstation settings. Check if they are on same network and if there's proxy/firewall issues.
Upvotes: 2
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