Develop Reference

Android - Error when uploading multiple images

I got error when I tried to upload all of the images. I use for to loop the process, but still got error in looping. if i don't use for, it still can upload the image but only 1 image that will be uploaded. how can I solve this?
UploadActivity.java
Intent intent = getIntent();
filePath = intent.getStringExtra("filePath");
ArrayList<String> flpath = new ArrayList<String>();
SharedPreferences prefs = getSharedPreferences("SavedFilePathsJSONArray",
Context.MODE_PRIVATE);
String myJSONArrayString = prefs.getString("SavedFilePathsJSONArray",
"");
if (!myJSONArrayString.isEmpty()) {
JSONArray jsonArray = null;
try {
jsonArray = new JSONArray(myJSONArrayString);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
for (int i = 0; i < jsonArray.length(); i++) {
try {
flpath.add(jsonArray.get(i).toString());
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
flpath.add(filePath);
JSONArray mJSONArray = new JSONArray(flpath);
SharedPreferences.Editor editor = prefs.edit();
editor.putString("SavedFilePathsJSONArray", mJSONArray.toString()).commit();
for (int i = 0; i < flpath.size(); i++) {
imgFile = new File(flpath.get(i));
if (imgFile.exists()) {
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath(),options);
ImageView myImage = new ImageView(this);
myImage.setMaxHeight(100);
myImage.setMaxWidth(100);
myImage.setImageBitmap(myBitmap);
layout2.addView(myImage);
}
}
private class UploadFileToServer extends AsyncTask<Void, Integer, String> {
#Override
protected void onPreExecute() {
// setting progress bar to zero
progressBar.setProgress(0);
super.onPreExecute();
}
#Override
protected void onProgressUpdate(Integer... progress) {
// Making progress bar visible
progressBar.setVisibility(View.VISIBLE);
// updating progress bar value
progressBar.setProgress(progress[0]);
// updating percentage value
txtPercentage.setText(String.valueOf(progress[0]) + "%");
}
#Override
protected String doInBackground(Void... params) {
return uploadFile();
}
#SuppressWarnings("deprecation")
private String uploadFile() {
String responseString = null;
for (int i = 0; i < flPath.size(); i++) {
File file = new File( flPath.get(i));
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(Config.FILE_UPLOAD_URL);
try {
AndroidMultiPartEntity entity = new AndroidMultiPartEntity(
new ProgressListener() {
#Override
public void transferred(long num) {
publishProgress((int) ((num / (float) totalSize) * 100));
}
});
// Adding file data to http body
entity.addPart("image", new FileBody(file));
// Extra parameters if you want to pass to server
entity.addPart("website",
new StringBody("www.androidhive.info"));
entity.addPart("email", new StringBody("abc#gmail.com"));
totalSize = entity.getContentLength();
httppost.setEntity(entity);
// Making server call
HttpResponse response = httpclient.execute(httppost);
HttpEntity r_entity = response.getEntity();
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 200) {
// Server response
responseString = EntityUtils.toString(r_entity);
} else {
responseString = "Error occurred! Http Status Code: "
+ statusCode;
}
} catch (ClientProtocolException e) {
responseString = e.toString();
} catch (IOException e) {
responseString = e.toString();
}
}
return responseString;
}
Config.Java
public class Config {
public static final String FILE_UPLOAD_URL = "http://....";
// Directory name to store captured images and videos
public static final String IMAGE_DIRECTORY_NAME = "andrd_upload";
}
error logcat
01-27 16:23:45.940: W/dalvikvm(15986): threadid=12: thread exiting with uncaught exception (group=0x40fe7438)
01-27 16:23:45.950: E/AndroidRuntime(15986): FATAL EXCEPTION: AsyncTask #1
01-27 16:23:45.950: E/AndroidRuntime(15986): java.lang.RuntimeException: An error occured while executing doInBackground()
01-27 16:23:45.950: E/AndroidRuntime(15986): at android.os.AsyncTask$3.done(AsyncTask.java:299)
01-27 16:23:45.950: E/AndroidRuntime(15986): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
01-27 16:23:45.950: E/AndroidRuntime(15986): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
01-27 16:23:45.950: E/AndroidRuntime(15986): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
01-27 16:23:45.950: E/AndroidRuntime(15986): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
01-27 16:23:45.950: E/AndroidRuntime(15986): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
01-27 16:23:45.950: E/AndroidRuntime(15986): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
01-27 16:23:45.950: E/AndroidRuntime(15986): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
01-27 16:23:45.950: E/AndroidRuntime(15986): at java.lang.Thread.run(Thread.java:856)
01-27 16:23:45.950: E/AndroidRuntime(15986): Caused by: java.lang.NullPointerException
01-27 16:23:45.950: E/AndroidRuntime(15986): at com.camerafileupload.UploadActivity$UploadFileToServer.uploadFile(UploadActivity.java:228)
01-27 16:23:45.950: E/AndroidRuntime(15986): at com.camerafileupload.UploadActivity$UploadFileToServer.doInBackground(UploadActivity.java:221)
01-27 16:23:45.950: E/AndroidRuntime(15986): at com.camerafileupload.UploadActivity$UploadFileToServer.doInBackground(UploadActivity.java:1)
01-27 16:23:45.950: E/AndroidRuntime(15986): at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-27 16:23:45.950: E/AndroidRuntime(15986): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
01-27 16:23:45.950: E/AndroidRuntime(15986): ... 5 more
01-27 16:23:46.130: D/HardwareRenderer(15986): draw surface is valid dirty= null
01-27 16:23:46.180: D/HardwareRenderer(15986): draw surface is valid dirty= null
01-27 16:23:46.220: D/HardwareRenderer(15986): draw surface is valid dirty= null
01-27 16:25:29.910: D/dalvikvm(15986): WAIT_FOR_CONCURRENT_GC blocked 0ms
01-27 16:25:29.950: D/dalvikvm(15986): GC_EXPLICIT freed 223K, 8% free 15337K/16583K, paused 2ms+4ms, total 38ms
ScreenShoot
Edit: i put the error logcat and the screenshoot of the error page (UploadActivity.java).

Insert into database AsyncTask error

I make an android application on movies. I have a database movies. In the application I display the movies in ListView and I add a new movie.
I have a problem when I try to insert in my dataBase a new movie. Indeed, I have n error in my AsyncTask in the doInBackground but I don't know why. When I use the debugger, I have reject on the begin of the doInBackground at the line :
String title = eTitle.getText().toString();
So I give you my java code :
public class AddMovie extends Activity implements OnClickListener{
// Edit and Button that the user fill
private EditText eTitle, eActors, eDirector, eKind, eDate, eImage, eSummary ;
private Button bAdd;
// Progress Dialog
private ProgressDialog pDialog;
//JSON parser class
//JSONParser jsonParser = new JSONParser();
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_movie);
eTitle = (EditText)findViewById(R.id.title);
eActors = (EditText)findViewById(R.id.actors);
eDirector = (EditText)findViewById(R.id.director);
eKind = (EditText)findViewById(R.id.kind);
eDate = (EditText)findViewById(R.id.date);
eImage = (EditText)findViewById(R.id.image);
eSummary = (EditText)findViewById(R.id.summary);
bAdd = (Button)findViewById(R.id.addMovies);
bAdd.setOnClickListener(this);
}
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.addMovies:
new AttempMovie().execute();
// here we have used, switch case, because on login activity you may //also want to show registration button, so if the user is new ! we can go the //registration activity , other than this we could also do this without switch //case.
default:
break;
}
}
class AttempMovie extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
boolean failure = false;
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AddMovie.this);
pDialog.setMessage("Attempting for add new movie...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// here Check for success tag
int success;
String title = eTitle.getText().toString();
String actors = eActors.getText().toString();
String director = eDirector.getText().toString();
String kind = eKind.getText().toString();
String date = eDate.getText().toString();
String image = eImage.getText().toString();
String summary = eSummary.getText().toString();
try {
// Building parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("title", title));
params.add(new BasicNameValuePair("actors", actors));
params.add(new BasicNameValuePair("director", director));
params.add(new BasicNameValuePair("kind", kind));
params.add(new BasicNameValuePair("date", date));
params.add(new BasicNameValuePair("image", image));
params.add(new BasicNameValuePair("summary", summary));
Log.d("request!", "starting");
JSONObject json = JSONfunctions.getJSONfromURL("http://10.0.0.35/BD_Enterprise_Mobility_Movies/add_movie.php");
// checking log for json response
Log.d("Register attempt", json.toString());
// success tag for json
success = json.getInt(TAG_SUCCESS);
if (success == 1)
{
Log.d("Successfully Register!", json.toString());
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;
}
/**
* Once the background process is done we need to Dismiss the progress dialog asap
* **/
protected void onPostExecute(String message) {
pDialog.dismiss();
if (message != null){
Intent i = new Intent(AddMovie.this,MainActivity.class);
finish();
// this finish() method is used to tell android os that we are done with current //activity now! Moving to other activity
startActivity(i);
Toast.makeText(AddMovie.this, message, Toast.LENGTH_LONG).show();
}
}
}
}
I give you also my JSONfunctions.java
public class JSONfunctions {
public static JSONObject getJSONfromURL(String url) {
InputStream is = null;
String result = "";
JSONObject json = null;
// Download JSON data from URL
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
} catch (Exception e) {
Log.e("log_tag", "Error in http connection " + e.toString());
}
// Convert response to string
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();
result = sb.toString();
} catch (Exception e) {
Log.e("log_tag", "Error converting result " + e.toString());
}
try {
json = new JSONObject(result);
} catch (JSONException e) {
Log.e("log_tag", "Error parsing data " + e.toString());
}
return json;
}
}
And my error in the logcat:
03-20 18:28:19.753: E/AndroidRuntime(14656): FATAL EXCEPTION: AsyncTask #3
03-20 18:28:19.753: E/AndroidRuntime(14656): Process: com.mickKoza.jsonkoza, PID: 14656
03-20 18:28:19.753: E/AndroidRuntime(14656): java.lang.RuntimeException: An error occured while executing doInBackground()
03-20 18:28:19.753: E/AndroidRuntime(14656): at android.os.AsyncTask$3.done(AsyncTask.java:300)
03-20 18:28:19.753: E/AndroidRuntime(14656): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
03-20 18:28:19.753: E/AndroidRuntime(14656): at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
03-20 18:28:19.753: E/AndroidRuntime(14656): at java.util.concurrent.FutureTask.run(FutureTask.java:242)
03-20 18:28:19.753: E/AndroidRuntime(14656): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
03-20 18:28:19.753: E/AndroidRuntime(14656): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
03-20 18:28:19.753: E/AndroidRuntime(14656): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
03-20 18:28:19.753: E/AndroidRuntime(14656): at java.lang.Thread.run(Thread.java:818)
03-20 18:28:19.753: E/AndroidRuntime(14656): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference
03-20 18:28:19.753: E/AndroidRuntime(14656): at com.mickKoza.jsonkoza.AddMovie$AttempMovie.doInBackground(AddMovie.java:81)
03-20 18:28:19.753: E/AndroidRuntime(14656): at com.mickKoza.jsonkoza.AddMovie$AttempMovie.doInBackground(AddMovie.java:1)
03-20 18:28:19.753: E/AndroidRuntime(14656): at android.os.AsyncTask$2.call(AsyncTask.java:288)
03-20 18:28:19.753: E/AndroidRuntime(14656): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
03-20 18:28:19.753: E/AndroidRuntime(14656): ... 4 more
03-20 18:28:20.184: E/WindowManager(14656): android.view.WindowLeaked: Activity com.mickKoza.jsonkoza.AddMovie has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{3e1b7378 V.E..... R......D 0,0-1026,288} that was originally added here
03-20 18:28:20.184: E/WindowManager(14656): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:363)
03-20 18:28:20.184: E/WindowManager(14656): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:261)
03-20 18:28:20.184: E/WindowManager(14656): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
03-20 18:28:20.184: E/WindowManager(14656): at android.app.Dialog.show(Dialog.java:298)
03-20 18:28:20.184: E/WindowManager(14656): at com.mickKoza.jsonkoza.AddMovie$AttempMovie.onPreExecute(AddMovie.java:74)
03-20 18:28:20.184: E/WindowManager(14656): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
03-20 18:28:20.184: E/WindowManager(14656): at android.os.AsyncTask.execute(AsyncTask.java:535)
03-20 18:28:20.184: E/WindowManager(14656): at com.mickKoza.jsonkoza.AddMovie.onClick(AddMovie.java:54)
03-20 18:28:20.184: E/WindowManager(14656): at android.view.View.performClick(View.java:4756)
03-20 18:28:20.184: E/WindowManager(14656): at android.view.View$PerformClick.run(View.java:19749)
03-20 18:28:20.184: E/WindowManager(14656): at android.os.Handler.handleCallback(Handler.java:739)
03-20 18:28:20.184: E/WindowManager(14656): at android.os.Handler.dispatchMessage(Handler.java:95)
03-20 18:28:20.184: E/WindowManager(14656): at android.os.Looper.loop(Looper.java:135)
03-20 18:28:20.184: E/WindowManager(14656): at android.app.ActivityThread.main(ActivityThread.java:5221)
03-20 18:28:20.184: E/WindowManager(14656): at java.lang.reflect.Method.invoke(Native Method)
03-20 18:28:20.184: E/WindowManager(14656): at java.lang.reflect.Method.invoke(Method.java:372)
03-20 18:28:20.184: E/WindowManager(14656): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
03-20 18:28:20.184: E/WindowManager(14656): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Thank you for your help
Michaël

One (or possibly all) of these views is null:
String title = eTitle.getText().toString();
String actors = eActors.getText().toString();
String director = eDirector.getText().toString();
String kind = eKind.getText().toString();
String date = eDate.getText().toString();
String image = eImage.getText().toString();
String summary = eSummary.getText().toString();
Possibly the view IDs that you're referencing during onCreate to find these views are not correct?

Error parsing data org.json.JSONException: Value <br with a login system android

I want to make a login registration system with my app but is not working properly. Here the code where I think I've got an error.
PHP LOGIN SCRIPT :
<?php
//load and connect to MySQL database stuff
require("config.inc.php");
if (!empty($_POST)) {
//gets user's info based off of a username.
$query = "
SELECT
id,
username,
password
FROM users
WHERE
username = :username
";
$query_params = array(
':username' => $_POST['username']
);
try {
$stmt = $db->prepare($query);
$result = $stmt->execute($query_params);
}
catch (PDOException $ex) {
// For testing, you could use a die and message.
//die("Failed to run query: " . $ex->getMessage());
//or just use this use this one to product JSON data:
$response["success"] = 0;
$response["message"] = "Database Error1. Please Try Again!";
die(json_encode($response));
}
//This will be the variable to determine whether or not the user's information is correct.
//we initialize it as false.
$validated_info = false;
//fetching all the rows from the query
$row = $stmt->fetch();
if ($row) {
//if we encrypted the password, we would unencrypt it here, but in our case we just
//compare the two passwords
if ($_POST['password'] === $row['password']) {
$login_ok = true;
}
}
// If the user logged in successfully, then we send them to the private members-only page
// Otherwise, we display a login failed message and show the login form again
if ($login_ok) {
$response["success"] = 1;
$response["message"] = "Login successful!";
die(json_encode($response));
} else {
$response["success"] = 0;
$response["message"] = "Invalid Credentials!";
die(json_encode($response));
}
} else {
$response["message"] = "Enter username and password!";
die(json_encode($response));
}
?>
<h1>Login</h1>
<form action="login.php" method="post">
Username:<br />
<input type="text" name="username" placeholder="username" />
<br /><br />
Password:<br />
<input type="password" name="password" placeholder="password" value="" />
<br /><br />
<input type="submit" value="Login" />
</form>
Register
<?php
?>
LoginActivity :
public class LoginActivity extends ActionBarActivity {
Button btnLogin;
Button btnLinkToRegister;
EditText inputEmail;
EditText inputPassword;
TextView loginErrorMsg;
private ProgressDialog pDialog;
JSONParser jsonParser = new JSONParser();
// JSON Response node names
private static String KEY_SUCCESS = "success";
private static String KEY_ERROR = "error";
private static String KEY_ERROR_MSG = "error_msg";
private static String KEY_UID = "uid";
private static String KEY_NAME = "name";
private static String KEY_EMAIL = "email";
private static String KEY_CREATED_AT = "created_at";
private static final String TAG_MESSAGE = "message";
// Testing on emulator
private static String LOGIN_URL = "http://10.0.2.2/webservice/login.php";
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
getSupportActionBar().hide();
setContentView(R.layout.login);
// Importing all assets like buttons, text fields
inputEmail = (EditText) findViewById(R.id.loginEmail);
inputPassword = (EditText) findViewById(R.id.loginPassword);
btnLogin = (Button) findViewById(R.id.btnLogin);
btnLinkToRegister = (Button) findViewById(R.id.btnLinkToRegisterScreen);
loginErrorMsg = (TextView) findViewById(R.id.login_error);
// Login button Click Event
btnLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
new LoginProcess().execute();
}
});
// Link to Register Screen
btnLinkToRegister.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(),
RegisterActivity.class);
startActivity(i);
finish();
}
});
}
private class LoginProcess extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(LoginActivity.this);
pDialog.setMessage("Attempting login...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected String doInBackground(String... args) {
// Check for success tag
int success;
String username = inputEmail.getText().toString();
String password = inputPassword.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(KEY_SUCCESS);
if (success == 1) {
Log.d("Login Successful!", json.toString());
Intent i = new Intent(LoginActivity.this,
MainActivity.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(LoginActivity.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
JSONParser Class:
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) {
// Making HTTP request
try {
// 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();
} 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();
Log.e("JSON", json);
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
Log.d("JSON Parser", json);
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
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;
}
}
When I want to login with the right username and password it's working but if I put right username and wrong password I've got an error. But if I delete query_params at :
$result = $stmt->execute($query_params);
I don't have any errors but I can't login anymore
The logcat :
08-31 10:40:39.885: E/Trace(1239): error opening trace file: No such file or directory (2)
08-31 10:40:40.785: D/dalvikvm(1239): GC_FOR_ALLOC freed 118K, 2% free 10936K/11143K, paused 55ms, total 57ms
08-31 10:40:40.845: I/dalvikvm-heap(1239): Grow heap (frag case) to 13.346MB for 2764816-byte allocation
08-31 10:40:40.954: D/dalvikvm(1239): GC_CONCURRENT freed 1K, 2% free 13635K/13895K, paused 24ms+6ms, total 108ms
08-31 10:40:41.334: D/libEGL(1239): loaded /system/lib/egl/libEGL_emulation.so
08-31 10:40:41.345: D/(1239): HostConnection::get() New Host Connection established 0x2a126450, tid 1239
08-31 10:40:41.357: D/libEGL(1239): loaded /system/lib/egl/libGLESv1_CM_emulation.so
08-31 10:40:41.376: D/libEGL(1239): loaded /system/lib/egl/libGLESv2_emulation.so
08-31 10:40:41.455: W/EGL_emulation(1239): eglSurfaceAttrib not implemented
08-31 10:40:41.465: D/OpenGLRenderer(1239): Enabling debug mode 0
08-31 10:40:45.545: D/request!(1239): starting
08-31 10:40:45.645: W/EGL_emulation(1239): eglSurfaceAttrib not implemented
08-31 10:40:48.205: E/JSON Parser(1239): Error parsing data org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
08-31 10:40:48.355: W/dalvikvm(1239): threadid=11: thread exiting with uncaught exception (group=0x40a13300)
08-31 10:40:48.754: E/AndroidRuntime(1239): FATAL EXCEPTION: AsyncTask #1
08-31 10:40:48.754: E/AndroidRuntime(1239): java.lang.RuntimeException: An error occured while executing doInBackground()
08-31 10:40:48.754: E/AndroidRuntime(1239): at android.os.AsyncTask$3.done(AsyncTask.java:299)
08-31 10:40:48.754: E/AndroidRuntime(1239): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
08-31 10:40:48.754: E/AndroidRuntime(1239): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
08-31 10:40:48.754: E/AndroidRuntime(1239): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
08-31 10:40:48.754: E/AndroidRuntime(1239): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
08-31 10:40:48.754: E/AndroidRuntime(1239): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
08-31 10:40:48.754: E/AndroidRuntime(1239): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
08-31 10:40:48.754: E/AndroidRuntime(1239): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
08-31 10:40:48.754: E/AndroidRuntime(1239): at java.lang.Thread.run(Thread.java:856)
08-31 10:40:48.754: E/AndroidRuntime(1239): Caused by: java.lang.NullPointerException
08-31 10:40:48.754: E/AndroidRuntime(1239): at com.example.diycenter.LoginActivity$LoginProcess.doInBackground(LoginActivity.java:118)
08-31 10:40:48.754: E/AndroidRuntime(1239): at com.example.diycenter.LoginActivity$LoginProcess.doInBackground(LoginActivity.java:1)
08-31 10:40:48.754: E/AndroidRuntime(1239): at android.os.AsyncTask$2.call(AsyncTask.java:287)
08-31 10:40:48.754: E/AndroidRuntime(1239): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
08-31 10:40:48.754: E/AndroidRuntime(1239): ... 5 more
08-31 10:40:51.844: E/WindowManager(1239): Activity com.example.diycenter.LoginActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView#4148a190 that was originally added here
08-31 10:40:51.844: E/WindowManager(1239): android.view.WindowLeaked: Activity com.example.diycenter.LoginActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView#4148a190 that was originally added here
08-31 10:40:51.844: E/WindowManager(1239): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:374)
08-31 10:40:51.844: E/WindowManager(1239): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:292)
08-31 10:40:51.844: E/WindowManager(1239): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
08-31 10:40:51.844: E/WindowManager(1239): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
08-31 10:40:51.844: E/WindowManager(1239): at android.view.Window$LocalWindowManager.addView(Window.java:547)
08-31 10:40:51.844: E/WindowManager(1239): at android.app.Dialog.show(Dialog.java:277)
08-31 10:40:51.844: E/WindowManager(1239): at com.example.diycenter.LoginActivity$LoginProcess.onPreExecute(LoginActivity.java:96)
08-31 10:40:51.844: E/WindowManager(1239): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
08-31 10:40:51.844: E/WindowManager(1239): at android.os.AsyncTask.execute(AsyncTask.java:534)
08-31 10:40:51.844: E/WindowManager(1239): at com.example.diycenter.LoginActivity$1.onClick(LoginActivity.java:69)
08-31 10:40:51.844: E/WindowManager(1239): at android.view.View.performClick(View.java:4084)
08-31 10:40:51.844: E/WindowManager(1239): at android.view.View$PerformClick.run(View.java:16966)
08-31 10:40:51.844: E/WindowManager(1239): at android.os.Handler.handleCallback(Handler.java:615)
08-31 10:40:51.844: E/WindowManager(1239): at android.os.Handler.dispatchMessage(Handler.java:92)
08-31 10:40:51.844: E/WindowManager(1239): at android.os.Looper.loop(Looper.java:137)
08-31 10:40:51.844: E/WindowManager(1239): at android.app.ActivityThread.main(ActivityThread.java:4745)
08-31 10:40:51.844: E/WindowManager(1239): at java.lang.reflect.Method.invokeNative(Native Method)
08-31 10:40:51.844: E/WindowManager(1239): at java.lang.reflect.Method.invoke(Method.java:511)
08-31 10:40:51.844: E/WindowManager(1239): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
08-31 10:40:51.844: E/WindowManager(1239): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-31 10:40:51.844: E/WindowManager(1239): at dalvik.system.NativeStart.main(Native Method)

The OP wrote in an edit:
UPDATE : I found the solution I add :
Log.e("jsonlol", json);
in the JSONParser class before i create the JSONObject and then i check in the logcat what was the the message and it was like that :
08-31 12:31:16.854: E/jsonlol(786): <br />
08-31 12:31:16.854: E/jsonlol(786): <b>Notice</b>: Undefined variable: login_ok in <b>C:\xampp\htdocs\webservice\login.php</b> on line <b>54</b><br />
08-31 12:31:16.854: E/jsonlol(786): {"success":0,"message":"Invalid Credentials!"}
08-31 12:31:17.012: E/JSON Parser(786): Error parsing data org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
So I went to the php file login.php on line 54 and there was a variable name problem I just change
$validated_info = false;
by
$login_ok = false;
If you follow the mybringback tutorial it's an error on the script.

Using webAPIs in android for login gives FATAL EXCEPTION: AsyncTask #1 error

I am very new in using JSON in Android. I have got the webAPI that the base URL is
Test server. While developing, I am trying to login using email and password from web server database.
A user token is calculated by following formula:
Token = MD5(email + userId); I do not know what is this. What I tried to do is ;
JSONParser.java
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
System.out.println("url:: "+url );
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
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 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;
}
// function get json from url
// by making HTTP POST or GET method
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
//Making HTTP request
try{
//check for the request method
if(method == "POST"){
//request method to post
//default HTTPClient
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 to 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;
}
}
Login.java
public class Login extends Activity {
EditText inputEmail;
EditText inputPassword;
Button loginBtn;
// Progress Dialog
ProgressDialog pDialog;
// JSONParser class
JSONParser jsonParser = new JSONParser();
// PHP Login Script location
private static final String LOGIN_URL = "http://www.sthng.com/ws/?c=profile&func=login";
// JSON element ids from repsonse of php script:
private static final String TAG_SUCCESS = "Success";
private static final String TAG_MESSAGE = "Message";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
inputEmail = (EditText) findViewById(R.id.email);
inputPassword = (EditText) findViewById(R.id.password);
loginBtn = (Button) findViewById(R.id.btnLogin);
loginBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
new AttemptLogin().execute();
}
});
}
// AsyncTask is a seperate thread than the thread that runs the GUI
// Any type of networking should be done with asynctask.
class AttemptLogin extends AsyncTask<String, Void, String> {
String email = inputEmail.getText().toString();
String password = inputPassword.getText().toString();
/**
* 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) {
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("email", email));
params.add(new BasicNameValuePair("password", password));
//params.add(new BasicNameValuePair("RegistrationID", ));
// Log.d("HERE", email);
// Log.d("HERE2", password);
Log.d("request!", "starting");
// getting users details by making HTTP request
JSONObject json = jsonParser.makeHttpRequest(LOGIN_URL, "GET", params);
Log.d("DEBUG!", "CHECKPOINT");
// json = json.toString();
// 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());
/* Intent i = new Intent(Login.this, Home.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) {
pDialog.dismiss();
if (file_url != null) {
Toast.makeText(Login.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
But I am getting error like;
04-29 19:03:22.691: D/request!(15060): starting
04-29 19:03:22.736: D/dalvikvm(15060): GC_CONCURRENT freed 222K, 14% free 9575K/11015K, paused 13ms+22ms, total 82ms
04-29 19:03:22.781: W/dalvikvm(15060): threadid=11: thread exiting with uncaught exception (group=0x41d082a0)
04-29 19:03:22.791: E/AndroidRuntime(15060): FATAL EXCEPTION: AsyncTask #1
04-29 19:03:22.791: E/AndroidRuntime(15060): java.lang.RuntimeException: An error occured while executing doInBackground()
04-29 19:03:22.791: E/AndroidRuntime(15060): at android.os.AsyncTask$3.done(AsyncTask.java:299)
04-29 19:03:22.791: E/AndroidRuntime(15060): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
04-29 19:03:22.791: E/AndroidRuntime(15060): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
04-29 19:03:22.791: E/AndroidRuntime(15060): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
04-29 19:03:22.791: E/AndroidRuntime(15060): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
04-29 19:03:22.791: E/AndroidRuntime(15060): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
04-29 19:03:22.791: E/AndroidRuntime(15060): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
04-29 19:03:22.791: E/AndroidRuntime(15060): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
04-29 19:03:22.791: E/AndroidRuntime(15060): at java.lang.Thread.run(Thread.java:856)
04-29 19:03:22.791: E/AndroidRuntime(15060): Caused by: java.lang.IllegalArgumentException: Host name may not be null
04-29 19:03:22.791: E/AndroidRuntime(15060): at org.apache.http.HttpHost.<init>(HttpHost.java:83)
04-29 19:03:22.791: E/AndroidRuntime(15060): at org.apache.http.impl.client.AbstractHttpClient.determineTarget(AbstractHttpClient.java:519)
04-29 19:03:22.791: E/AndroidRuntime(15060): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:509)
04-29 19:03:22.791: E/AndroidRuntime(15060): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
04-29 19:03:22.791: E/AndroidRuntime(15060): at com.example.sthng.JSONParser.makeHttpRequest(JSONParser.java:125)
04-29 19:03:22.791: E/AndroidRuntime(15060): at com.example.sthng.Login$AttemptLogin.doInBackground(Login.java:106)
04-29 19:03:22.791: E/AndroidRuntime(15060): at com.example.sthng.Login$AttemptLogin.doInBackground(Login.java:1)
04-29 19:03:22.791: E/AndroidRuntime(15060): at android.os.AsyncTask$2.call(AsyncTask.java:287)
04-29 19:03:22.791: E/AndroidRuntime(15060): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
04-29 19:03:22.791: E/AndroidRuntime(15060): ... 5 more
04-29 19:03:32.686: I/Choreographer(15060): Skipped 589 frames! The application may be doing too much work on its main thread.
04-29 19:03:33.256: E/WindowManager(15060): Activity com.example.sthng.Login has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView#427a0298 that was originally added here
04-29 19:03:33.256: E/WindowManager(15060): android.view.WindowLeaked: Activity com.example.clipme.Login has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView#427a0298 that was originally added here
04-29 19:03:33.256: E/WindowManager(15060): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:403)
04-29 19:03:33.256: E/WindowManager(15060): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:311)
04-29 19:03:33.256: E/WindowManager(15060): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
04-29 19:03:33.256: E/WindowManager(15060): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
04-29 19:03:33.256: E/WindowManager(15060): at android.view.Window$LocalWindowManager.addView(Window.java:554)
04-29 19:03:33.256: E/WindowManager(15060): at android.app.Dialog.show(Dialog.java:277)
04-29 19:03:33.256: E/WindowManager(15060): at com.example.sthng.Login$AttemptLogin.onPreExecute(Login.java:87)
04-29 19:03:33.256: E/WindowManager(15060): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
04-29 19:03:33.256: E/WindowManager(15060): at android.os.AsyncTask.execute(AsyncTask.java:534)
04-29 19:03:33.256: E/WindowManager(15060): at com.example.sthng.Login$1.onClick(Login.java:61)
04-29 19:03:33.256: E/WindowManager(15060): at android.view.View.performClick(View.java:4232)
04-29 19:03:33.256: E/WindowManager(15060): at android.view.View$PerformClick.run(View.java:17298)
04-29 19:03:33.256: E/WindowManager(15060): at android.os.Handler.handleCallback(Handler.java:615)
04-29 19:03:33.256: E/WindowManager(15060): at android.os.Handler.dispatchMessage(Handler.java:92)
04-29 19:03:33.256: E/WindowManager(15060): at android.os.Looper.loop(Looper.java:137)
04-29 19:03:33.256: E/WindowManager(15060): at android.app.ActivityThread.main(ActivityThread.java:4921)
04-29 19:03:33.256: E/WindowManager(15060): at java.lang.reflect.Method.invokeNative(Native Method)
04-29 19:03:33.256: E/WindowManager(15060): at java.lang.reflect.Method.invoke(Method.java:511)
04-29 19:03:33.256: E/WindowManager(15060): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
04-29 19:03:33.256: E/WindowManager(15060): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
04-29 19:03:33.256: E/WindowManager(15060): at dalvik.system.NativeStart.main(Native Method)
I am sure I have done some stupid mistake but please do not take it bad way. I hope I get some hints and solutions for this.

You are accessing UI element doInBackground()
Intent i = new Intent(Login.this, Home.class);
finish();
startActivity(i);
above method on doInBackground(). You have to call this method onPostExecute.
you are sending email and password two time.
You make url with https:sthng.com/ws?function=login&email=" + email+ "&password=" + password
JSONObject json = jsonParser.makeHttpRequest(
"https:sthng.com/ws?function=login&email=" + email
+ "&password=" + password, "POST", params);
or
Now you make below param.
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("email", email));
params.add(new BasicNameValuePair("password", password));
params.add(new BasicNameValuePair("androidToken", androidToken));// your token
and passing again
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));// passing again

Gson and Google

I have the following code:
public String test(){
URL url = null;
try {
url = new URL("http://api.heroesofnewerth.com/player_statistics/ranked/nickname/Hieratic/?token=0CZGH8ZI7UR8J2GN");
} catch (MalformedURLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
BufferedReader reader = null;
String x = "";
try {
reader = new BufferedReader(new InputStreamReader(url.openStream(), "UTF-8"));
for (String line; (line = reader.readLine()) != null;) {
System.out.println(line);
x = line;
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally{
if (reader !=null) try{reader.close();} catch (IOException ignore) {
}{}
}
JsonElement root = new JsonParser().parse(x);
return x;
}
}
now i want to insert the text into the following textView.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_competetion);
TextView tv = (TextView) findViewById(R.id.competetion_text);
JsonCollector jc = new JsonCollector();
tv.setText(jc.test());
However when i try to run it. i get the following error:
FATAL EXCEPTION: main
E/AndroidRuntime(1800): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.konkurrencesigner/com.example.konkurrencesigner.CreateCompetetion}: android.os.NetworkOnMainThreadException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
E/AndroidRuntime(1800): at android.app.ActivityThread.access$600(ActivityThread.java:141)
E/AndroidRuntime(1800): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
E/AndroidRuntime(1800): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(1800): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(1800): at android.app.ActivityThread.main(ActivityThread.java:5039)
E/AndroidRuntime(1800): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(1800): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime(1800): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
E/AndroidRuntime(1800): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
E/AndroidRuntime(1800): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(1800): Caused by: android.os.NetworkOnMainThreadException
E/AndroidRuntime(1800): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
E/AndroidRuntime(1800): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
E/AndroidRuntime(1800): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
E/AndroidRuntime(1800): at java.net.InetAddress.getAllByName(InetAddress.java:214)
E/AndroidRuntime(1800): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
E/AndroidRuntime(1800): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
E/AndroidRuntime(1800): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
E/AndroidRuntime(1800): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
E/AndroidRuntime(1800): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
E/AndroidRuntime(1800): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:316)
E/AndroidRuntime(1800): at libcore.net.http.HttpEngine.connect(HttpEngine.java:311)
E/AndroidRuntime(1800): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:290)
E/AndroidRuntime(1800): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:240)
E/AndroidRuntime(1800): at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:282)
Can anyone tell me why this is happening?
please note that i have already added the following line in my android manifest:
<uses-permission android:name="android.permission.INTERNET" />

You are doing HTTP communication on the main thread, that's why you're getting a NetworkOnMainThreadException. Do it in a separate thread, using an AsyncTask would be an ideal solution, here's an example of how you could implement it:
private TextView tv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_competetion);
tv = (TextView) findViewById(R.id.competetion_text);
JsonCollector jc = new JsonCollector();
// Create and execute a new AsyncTask, the TextView will
// be updated asynchronously when the task has finished.
updateTextView();
}
private void updateTextView() {
new AsyncTask<Void, Void, String>() {
#Override
/* Runs on a separate thread */
protected String doInBackground(Void... params) {
String result = null;
BufferedReader reader = null;
try {
URL url = new URL("http://api.heroesofnewerth.com/player_statistics/ranked/nickname/Hieratic/?token=0CZGH8ZI7UR8J2GN");
reader = new BufferedReader(new InputStreamReader(url.openStream(), "UTF-8"));
for (String line; (line = reader.readLine()) != null;) {
System.out.println(line);
result = line;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
// Ignore
}
}
}
return result;
}
#Override
/* Runs on the UI/Main thread when doInBackground()
* has finished */
protected void onPostExecute(String result) {
if(result != null) {
// Update the TextView only if we got a result
// from the HTTP request
tv.setText(result);
}
}
}.execute();
}

If you need networking in main thread add these lines of code in the onCreate() method
StrictMode.ThreadPolicy policy =
new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);