2
, поэтому я пытался создать простое приложение для входа, подключенное к моему серверу wampserver, следуя учебному курсу в Интернете, и он отлично работает, но проблема возникает, когда мое устройство не подключено к Интернету, и я не могу объясните, почему, но я уверен, что проблема в моей асинтете. Мне так нужна помощь, спасибо.Ошибка приложения, когда нет подключения к Интернету
вот мой login.java
package id.wanda.smkkkristenimmanuelii;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Login extends Activity implements OnClickListener {
private EditText user, pass;
private Button mSubmit;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
private static final String LOGIN_URL = "http://192.168.1.110:80/smkkimmanuel2/login.php";
// JSON element ids from repsonse of php script:
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
private static final String TAG_LEVEL_AKSES = "level_akses";
private static final String TAG_JABATAN = "jabatan";
public static String level_akses = "5", jabatan = "", namaUser = "";
public static String login_status = "false";
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
// setup input fields
user = (EditText) findViewById(R.id.username);
pass = (EditText) findViewById(R.id.password);
// setup buttons
mSubmit = (Button) findViewById(R.id.btnLogin);
// register listeners
mSubmit.setOnClickListener(this);
}
@Override
public void onBackPressed() {
Login.this.finish();
startActivity(new Intent(this, MenuUtama.class));
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnLogin:
new AttemptLogin().execute();
break;
default:
break;
}
}
class AttemptLogin extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
boolean failure = false;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Login.this);
pDialog.setMessage("Attempting login...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// Check for success tag
int success;
String levelaks, jabat;
String username = user.getText().toString();
String password = pass.getText().toString();
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", username));
params.add(new BasicNameValuePair("password", password));
Log.d("request!", "starting");
// getting product details by making HTTP request
JSONObject json = jsonParser.makeHttpRequest(LOGIN_URL, "POST",
params);
// check your log for json response
Log.d("Login attempt", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
Log.d("Login Successful!", json.toString());
levelaks = json.getString(TAG_LEVEL_AKSES);
jabat = json.getString(TAG_JABATAN);
level_akses = levelaks;
jabatan = jabat;
namaUser = username;
login_status = "true";
Intent i = new Intent(Login.this, MenuUtama.class);
finish();
startActivity(i);
return json.getString(TAG_MESSAGE);
} else {
Log.d("Login Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (file_url != null) {
Toast.makeText(Login.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
и вот мой JSONParser.java:
package id.wanda.smkkkristenimmanuelii;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(final String url) {
// Making HTTP request
try {
// Construct the client and the HTTP request.
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
// Execute the POST request and store the response locally.
HttpResponse httpResponse = httpClient.execute(httpPost);
// Extract data from the response.
HttpEntity httpEntity = httpResponse.getEntity();
// Open an inputStream with the data content.
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
// Create a BufferedReader to parse through the inputStream.
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
// Declare a string builder to help with the parsing.
StringBuilder sb = new StringBuilder();
// Declare a string to store the JSON object data in string form.
String line = null;
// Build the string until null.
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
// Close the input stream.
is.close();
// Convert the string builder data to an actual string.
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// Try to parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// Return the JSON Object.
return jObj;
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
вот мой отчет о сбое:
05-19 09:56:44.040: E/AndroidRuntime(24861): FATAL EXCEPTION: AsyncTask #1
05-19 09:56:44.040: E/AndroidRuntime(24861): Process: id.wanda.smkkkristenimmanuelii, PID: 24861
05-19 09:56:44.040: E/AndroidRuntime(24861): java.lang.RuntimeException: An error occured while executing doInBackground()
05-19 09:56:44.040: E/AndroidRuntime(24861): at android.os.AsyncTask$3.done(AsyncTask.java:300)
05-19 09:56:44.040: E/AndroidRuntime(24861): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
05-19 09:56:44.040: E/AndroidRuntime(24861): at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
05-19 09:56:44.040: E/AndroidRuntime(24861): at java.util.concurrent.FutureTask.run(FutureTask.java:242)
05-19 09:56:44.040: E/AndroidRuntime(24861): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
05-19 09:56:44.040: E/AndroidRuntime(24861): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
05-19 09:56:44.040: E/AndroidRuntime(24861): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
05-19 09:56:44.040: E/AndroidRuntime(24861): at java.lang.Thread.run(Thread.java:841)
05-19 09:56:44.040: E/AndroidRuntime(24861): Caused by: java.lang.NullPointerException
05-19 09:56:44.040: E/AndroidRuntime(24861): at id.wanda.smkkkristenimmanuelii.Login$AttemptLogin.doInBackground(Login.java:138)
05-19 09:56:44.040: E/AndroidRuntime(24861): at id.wanda.smkkkristenimmanuelii.Login$AttemptLogin.doInBackground(Login.java:1)
05-19 09:56:44.040: E/AndroidRuntime(24861): at android.os.AsyncTask$2.call(AsyncTask.java:288)
05-19 09:56:44.040: E/AndroidRuntime(24861): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
05-19 09:56:44.040: E/AndroidRuntime(24861): ... 4 more
05-19 09:56:44.040: W/ActivityManager(571): Force finishing activity id.wanda.smkkkristenimmanuelii/.Login
05-19 09:56:44.050: E/IMGSRV(192): :0: PVRDRMOpen: TP3, ret = 107
Вы можете показать свой отчет об аварии? – Eoin
catch (Exception e) попробуйте добавить это ко всем кодам обработки исключений. и проверить, что говорит printstacktrace? – Mox
@Modge я добавил свой отчет о сбое, пожалуйста, посмотрите, спасибо. –