Develop Reference

How to get Json object using UrlConnection in android?

Hi I am very for android just one week ago I come into this technology and in my app I am integrating services.
Here I have used HttpClient for that, but in android 6 I was deprecated.
That's why we have to use URlconnection, but how can we use this Url connection instead of HttpClient?
My code is below.
Please help me.
my code:-
public class MainActivity extends Activity {
ArrayList<Actors> actorsList;
ActorAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
actorsList = new ArrayList<Actors>();
new JSONAsyncTask().execute("http://microblogging.wingnity.com/JSONParsingTutorial/jsonActors");
ListView listview = (ListView)findViewById(R.id.list);
adapter = new ActorAdapter(getApplicationContext(), R.layout.row, actorsList);
listview.setAdapter(adapter);
listview.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long id) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), actorsList.get(position).getName(), Toast.LENGTH_LONG).show();
}
});
}
class JSONAsyncTask extends AsyncTask<String, Void, Boolean> {
ProgressDialog dialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(MainActivity.this);
dialog.setMessage("Loading, please wait");
dialog.setTitle("Connecting server");
dialog.show();
dialog.setCancelable(false);
}
#Override
protected Boolean doInBackground(String... urls) {
try {
//------------------>>
HttpGet httppost = new HttpGet(urls[0]);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);
// StatusLine stat = response.getStatusLine();
int status = response.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsono = new JSONObject(data);
JSONArray jarray = jsono.getJSONArray("actors");
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
Actors actor = new Actors();
actor.setName(object.getString("name"));
actor.setDescription(object.getString("description"));
actor.setDob(object.getString("dob"));
actor.setCountry(object.getString("country"));
actor.setHeight(object.getString("height"));
actor.setSpouse(object.getString("spouse"));
actor.setChildren(object.getString("children"));
actor.setImage(object.getString("image"));
actorsList.add(actor);
}
return true;
}
} catch (ParseException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return false;
}
protected void onPostExecute(Boolean result) {
dialog.cancel();
adapter.notifyDataSetChanged();
if(result == false)
Toast.makeText(getApplicationContext(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();
}
}
}

Use Volley instead. Volley is compatible with almost all APIs.
See here on how to do this.

Android web service error in http

In my project , to access the webservice am using http class which is not working properly and my project stops.
Can someone tell me an alternate way for accessing the webservice instead of using http.
Thank you in advance
class httpclass {
String result;
public String server_conn(String user_url)
{
// String user_url="";
String user_url3=user_url.replaceAll(" ","%20");
String user_url2=user_url3.replaceAll("\n","%0D");
HttpClient client = new DefaultHttpClient();
HttpGet siteRequest = new HttpGet(user_url2);
StringBuilder sb = new StringBuilder();
HttpResponse httpResponse;
try {
httpResponse = client.execute(siteRequest);
HttpEntity entity = httpResponse.getEntity();
InputStream in = entity.getContent();
String line = null;
BufferedReader reader = new BufferedReader(
new InputStreamReader(in));
while ((line = reader.readLine()) != null)
{
sb.append(line);
}
result = sb.toString();
} catch (ClientProtocolException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
}
log in form
public class LoginForm extends FragmentActivity {
/** Called when the activity is first created. */
TextView txt1, txt2, err,forget;
EditText name;
EditText pass;
Button click,vend;
CheckBox savepass;
Button newuser;
Button signin;
#SuppressWarnings("unused")
private Cursor signin1;
SharedPreferences sharedPreferences=null;
public static String str1, str2;
public static String result;
public static String username;
ProgressDialog myProgressDialog = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); BugSenseHandler.initAndStartSession(this, "68640bea");
setContentView(R.layout.login);
vend=(Button)findViewById(R.id.vend);
name = (EditText) findViewById(R.id.username);
pass = (EditText) findViewById(R.id.password);
savepass=(CheckBox)findViewById(R.id.savepass);
Button cancel = (Button) findViewById(R.id.cancel);
//Button back = (Button) findViewById(R.id.back);
cancel.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent second = new Intent( LoginForm.this,canceluser.class);
startActivity(second);
finish();
}
});
sharedPreferences=PreferenceManager.getDefaultSharedPreferences(this);
String name1=sharedPreferences.getString("p_name", "");
name.setText(name1.toString());
String pass1=sharedPreferences.getString("p_pass", "");
pass.setText(pass1.toString());
//s forget=(TextView)findViewById(R.id.forget);
signin = (Button) findViewById(R.id.signin);
click = (Button) findViewById(R.id.click);
newuser = (Button) findViewById(R.id.signup);
vend.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent viewIntent =
new Intent("android.intent.action.VIEW",
Uri.parse("http://www.iwedplanner.com/vendor/vendorhome.aspx"));
startActivity(viewIntent);
}});
click.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent1 = new Intent(LoginForm.this, forgetpwd.class);
startActivity(intent1);
finish();
}});
signin.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v) {
if(name.getText().toString().equals(""))
{
alertbox("Message!","Enter Your Username");
name.requestFocus();
}
else if(pass.getText().toString().equals(""))
{
alertbox("Message!","Enter Your Password");
pass.requestFocus();
}
else
{
str1 = name.getText().toString();
str2 = pass.getText().toString();
boolean value = false;
// validuser();
ConnectivityManager cm = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
if (info != null && info.isAvailable()) {
value = true;
openconn(str1, str2);
}
else
{
alertbox("Message!", "No Internet Connection!");
}
}
}
});
newuser.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
newuser();
}
});
}
public void openconn(String strr1, String strr2)
{
if (!strr1.equals("") && !strr2.equals(""))
{
err = (TextView) findViewById(R.id.err);
// String user_url = "http://iwedplanner.com/mobile/MLogin.aspx?uname="+ strr1 + "&pwd=" + strr2;
String user_url="http://mobileapps.iwedplanner.com/mobileapps/iwedplanner/mobile/MLogin.aspx?uname="+ strr1 + "&pwd=" + strr2;
httpclass obj = new httpclass();
result = obj.server_conn(user_url);
// alertbox("",""+result);
if (result != null)
{
StringTokenizer st = new StringTokenizer(result, "|");
result = st.nextToken();
if (result.equals("InvalidUser "))
{
Dialog locationError = new AlertDialog.Builder(
LoginForm.this).setIcon(0).setTitle("Message!")
.setPositiveButton(R.string.yes, null).setMessage(
"Sorry, Invalid Username or Password ")
.create();
locationError.show();
name.requestFocus();
}
else if(result.equals(strr1))
{
// Toast.makeText(getBaseContext(),"Valid User",Toast.LENGTH_SHORT).show();
if(savepass.isChecked())
{
SharedPreferences.Editor editor=sharedPreferences.edit();
editor.putString("p_name",name.getText().toString());
//editor.putString("p_pass",pass.getText().toString());
editor.commit();
}
else
{
SharedPreferences.Editor editor=sharedPreferences.edit();
editor.putString("p_name", "");
editor.putString("p_pass","");
editor.commit();
}
validuser();
}
else
{
alertbox("Message!","Error in network connection");
}
}
}
}
public void validuser()
{
username=str1;
name.setText("");
pass.setText("");
Intent userintent = new Intent(this, welcomeuser1.class);
//userintent.putExtra("name5",str1);
//Intent userintent=new Intent(this,WeddingInfo.class);
startActivity(userintent);
finish();
}
public void newuser() {
Intent userintent1 = new Intent(this, newuserform.class);
startActivity(userintent1);
finish();
}
protected void alertbox(String title, String mymessage) {
new AlertDialog.Builder(this)
.setMessage(mymessage)
.setTitle(title)
.setCancelable(true)
.setNeutralButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog,
int whichButton) {
}
}).show();
}
#Override
public void onStart() {
super.onStart();
// The rest of your onStart() code.
// // EasyTracker.getInstance(this).activityStart(this); // Add this method.
}
#Override
public void onStop() {
super.onStop();
// The rest of your onStop() code.
// EasyTracker.getInstance(this).activityStop(this); // Add this method.
}
}
Error:duplicate files during packaging of APK C:\Users\sentientit\Documents\Wed Studio\app\build\outputs\apk\app-debug-unaligned.apk
Path in archive: META-INF/LICENSE.txt
Origin 1: C:\Users\sentientit\Documents\Wed Studio\app\libs\twitter4j.jar
1 Origin 2: C:\Users\sentientit.gradle\caches\modules-2\files-2.1\joda-
time\joda-time\2.4\89e9725439adffbbd41c5f5c215c136082b34a7f\joda-time-2.4.jar
You can ignore those files in your build.gradle:
android {
packagingOptions {
exclude 'META-INF/LICENSE.txt'
}
}
Error:Execution failed for task ':app:packageDebug'.
Duplicate files copied in APK META-INF/LICENSE.txt
File 1: C:\Users\sentientit\Documents\Wed Studio\app\libs\twitter4j.jar
File 2: C:\Users\sentientit\.gradle\cache``s\modules-2\files-2.1\joda-time\joda-time\2.4\89e9725439adffbbd41c5f5c215c136082b34a7f\joda-time-2.4.jar

You can do this way:
AsyncTask for Web service:
private class AsyncCaller extends AsyncTask<Void, Void, Void>
{
ProgressDialog pdLoading = new ProgressDialog(AsyncExample.this);
#Override
protected void onPreExecute() {
super.onPreExecute();
//this method will be running on UI thread
pdLoading.setMessage("Loading...");
pdLoading.show();
}
#Override
protected Void doInBackground(Void... params) {
String serverGETResponse = getJsonDataStringFormat("Your_Url", "GET", "", "LOGIN_ACTIVITY");
String serverPOSTResponse = getJsonDataStringFormat("Your_Url", "POST", "YOUR_JSON_STRING", "LOGIN_ACTIVITY");
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
//this method will be running on UI thread
pdLoading.dismiss();
}
}
Now Get Response from server in Background thread:
public static String getJsonDataStringFormat(String url, String method,String jObjStr, String tag) {
InputStream is = null;
String Root_Response = null;
HttpResponse httpResponse;
HttpParams httpParameters = new BasicHttpParams();
DefaultHttpClient httpClient;
HttpConnectionParams.setConnectionTimeout(httpParameters,connectionTimeOut);
HttpConnectionParams.setSoTimeout(httpParameters, socketTimeOut);
try {
httpClient = new DefaultHttpClient(httpParameters);
url = url.replace(" ", "%20");
if (method == "POST") {
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new StringEntity(jObjStr));
httpResponse = httpClient.execute(httpPost);
is = httpResponse.getEntity().getContent();
} else if (method == "GET") {
HttpGet httpGet = new HttpGet(new URI(url));
httpResponse = httpClient.execute(httpGet);
is = httpResponse.getEntity().getContent();
}
Root_Response = convertStreamToString(is);
Log.i(tag, Root_Response);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}catch (URISyntaxException e) {
e.printStackTrace();
}
return Root_Response;
}
Convert Server's Response to String:
public static String convertStreamToString(InputStream inputStream)
throws IOException {
if (inputStream != null) {
StringBuilder sb = new StringBuilder();
String line;
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputStream, "UTF-8"));
while ((line = reader.readLine()) != null) {
sb.append(line).append("\n");
}
} finally {
inputStream.close();
}
return sb.toString();
} else {
return "";
}
}
Hope it will help you.

call the method server_conn() inside AsyncTask , and pass the url
private class AsyncTaskTest extends AsyncTask<String, Void, Void>
{
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected Void doInBackground(String... strings) {
server_conn(strings[0]);
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
}
}
and call the asynctastk using below syntax
new AsyncTaskTest().execute(url);

You are facing NetworkOnMainThread exception all you have to do is add this code :
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.detectAll()
.penaltyLog()
.build();
StrictMode.setThreadPolicy(policy);
For more details you can check developer site.

Response:wrong. [User registration via android app using http post not working]

I was able to successfully make login work. Now, I am stuck up with registration. Response is wrong.
public class Register extends Activity implements OnClickListener{
private String mTitle = "Write.My.Action";
private static final String LOGTAG = "tag";
public EditText fullname, email, password;
private Button register;
private ProgressDialog mDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
getActionBar().setTitle(mTitle);
fullname = (EditText) findViewById(R.id.fullname);
email = (EditText) findViewById(R.id.editText2);
password = (EditText) findViewById(R.id.editText1);
register = (Button) findViewById(R.id.button1);
register.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button1:
mDialog = new ProgressDialog(Register.this);
mDialog.setMessage("Attempting to Register...");
mDialog.setIndeterminate(false);
mDialog.setCancelable(false);
mDialog.show();
new Thread(new Runnable() {
#Override
public void run() {
register();
}
}).start();
}
}
void register() {
try {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("myurl");
System.out.println("httpPost is: " + httpPost);
String fullname_input = fullname.getText().toString().trim();
String email_input = email.getText().toString().trim();
String password_input = password.getText().toString().trim();
//adding data into list view so we can make post over the server
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();
nameValuePair.add(new BasicNameValuePair("fullname", fullname_input));
nameValuePair.add(new BasicNameValuePair("email", email_input));
nameValuePair.add(new BasicNameValuePair("password", password_input));
System.out.println("namevaluepair is: " + nameValuePair);
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
//execute http post resquest
HttpResponse httpResponse = httpClient.execute(httpPost);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpClient.execute(httpPost, responseHandler);
System.out.println("Response is: " + response);
runOnUiThread(new Runnable() {
#Override
public void run() {
mDialog.dismiss();
}
});
if(response.equalsIgnoreCase("Signed Up")){
runOnUiThread(new Runnable() {
#Override
public void run() {
startActivity(new Intent(Register.this, Registration_Success.class));
}
});
}else {
showAlert();
}
} catch (Exception e) {
mDialog.dismiss();
Log.i(LOGTAG, "Exception found"+ e.getMessage());
}
}
public void showAlert(){
Register.this.runOnUiThread(new Runnable() {
#Override
public void run() {
AlertDialog.Builder builder = new AlertDialog.Builder(Register.this);
builder.setTitle("Registration Error");
builder.setMessage("Please, try registration again!")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
}
}
Please Note: Every activities are registered in Manifest, INTERNET permission also included.
php file:
include "dbconnection.php";
$fullname = $_POST['fullname'];
$email = $_POST['email'];
$password = $_POST['password'];
$insert_data = "INSERT INTO register
Values ('', '$fullname', '$email', '$password')";
$insert_result = mysql_query($insert_data);
//echo "Signed Up";
if($insert_result){
echo "Signed Up";
}
else{
echo "wrong!";
}
I don't understand why it keeps on saying Response is : Wrong. Tired of spending almost a day .. I am here seeking help.
Excuse me if my questions seems naive.
Thank you in advance.

try below code:-
HttpResponse httpResponse = httpClient.execute(httpPost);
if (httpResponse != null)
{
InputStream in = httpResponse.getEntity().getContent();
result = ConvertStreamToString.convertStreamToString(in);
// System.out.println("result =>" + result);
}
convertStreamToString method
public String convertStreamToString(InputStream is)
{
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try
{
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{
try
{
is.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
return sb.toString();
}
do not under stand :-
HttpResponse httpResponse = httpClient.execute(httpPost); // getting response from server
// where you use this response and why using below line or whats the benefit of below line
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpClient.execute(httpPost, responseHandler);

Follow that tutorial very usefull, and clear how to work on json webservices with android.
How to connect Android with PHP, MySQL

Try this code using AsyncTask
public class Register extends Activity implements OnClickListener{
private String mTitle = "Write.My.Action";
private static final String LOGTAG = "tag";
public EditText fullname, email, password;
private Button register;
private ProgressDialog mDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
getActionBar().setTitle(mTitle);
fullname = (EditText) findViewById(R.id.fullname);
email = (EditText) findViewById(R.id.editText2);
password = (EditText) findViewById(R.id.editText1);
register = (Button) findViewById(R.id.button1);
register.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button1:
mDialog = new ProgressDialog(Register.this);
mDialog.setMessage("Attempting to Register...");
mDialog.setIndeterminate(false);
mDialog.setCancelable(false);
mDialog.show();
new RegisterUser().execute();
}
}
public class RegisterUser extends AsyncTask<Void, Void, String>
{
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
}
#Override
protected String doInBackground(Void... params) {
// TODO Auto-generated method stub
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("myurl");
System.out.println("httpPost is: " + httpPost);
String fullname_input = fullname.getText().toString().trim();
String email_input = email.getText().toString().trim();
String password_input = password.getText().toString().trim();
//adding data into list view so we can make post over the server
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();
nameValuePair.add(new BasicNameValuePair("fullname", fullname_input));
nameValuePair.add(new BasicNameValuePair("email", email_input));
nameValuePair.add(new BasicNameValuePair("password", password_input));
System.out.println("namevaluepair is: " + nameValuePair);
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
//execute http post resquest
HttpResponse httpResponse = httpClient.execute(httpPost);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpClient.execute(httpPost, responseHandler);
System.out.println("Response is: " + response);
return response;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if(response.equalsIgnoreCase("Signed Up")){
runOnUiThread(new Runnable() {
#Override
public void run() {
startActivity(new Intent(Register.this, Registration_Success.class));
}
});
}else {
showAlert();
}
}
}
public void showAlert(){
Register.this.runOnUiThread(new Runnable() {
#Override
public void run() {
AlertDialog.Builder builder = new AlertDialog.Builder(Register.this);
builder.setTitle("Registration Error");
builder.setMessage("Please, try registration again!")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
}
}
Hope this helps you!!!
If its not working please let me know i will try to help more...

Try using Volley if not. It's faster than the ussual HTTP connection classes.
Example:
RequestQueue queue = Volley.newRequestQueue(this);
String url = "url";
JSONObject juser = new JSONObject();
try {
juser.put("locationId", locID);
juser.put("email", email_input);
juser.put("password", password_input);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.POST, url, juser, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
// TODO Auto-generated method stub
txtDisplay.setText("Response => "+response.toString());
findViewById(R.id.progressBar1).setVisibility(View.GONE);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// TODO Auto-generated method stub
}
});
queue.add(jsObjRequest);

Like #Andrew T suggested , I am posting my solution.
The mysql_error()helped me debug the issue. mysql_error() displayed in the Logcat that "register table is not found" .. but the table name is registers. I was missing "s" at the end.
$fullname = $_POST['fullname'];
$email = $_POST['email'];
$password = $_POST['password'];
$insert_data = "INSERT INTO registers(id, fullname, email, password)
Values ('','$fullname', '$email', '$password')";
$insert_result = mysql_query($insert_data) or die(mysql_error());
//echo "Signed Up";
if($insert_result){
echo "Signed Up";
}
else{
echo "wrong!";
}
Everything worked perfect after that. Again, thank you all for your time and solutions. Everyone's suggestions are great, but I can not accept any answer at this point.. sorry:(

DefaultHttpClient's "connManager" is always null,cant execute http requests

i am building an application in which i prompt users to register. I have a django-restful server running at back end , and i m trying to make HTTP post requests to my server on android client with DefaultHttpClient class. I get email, username etc from user and at the button's onClick event, i create an AsnycTask to execute the request. Here is the code for the activity:
registerButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
String userName = usernameEditText.getText().toString();
String email = emailEditText.getText().toString();
String password = passwordEditText.getText().toString();
if( userName != null && email != null && password != null) {
new RegisterEventHandler().execute(userName , email , password);
}
}
});
....
class RegisterEventHandler extends AsyncTask<String, Integer, Boolean> {
#Override
protected Boolean doInBackground(String... params) {
RequestHandler handler = new RequestHandler();
return handler.register(params[0], params[1], params[2]);
}
#Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
if( result ) {
AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());
builder.setTitle(R.string.RegisterSuccessfullTitle);
builder.setMessage(R.string.RegisterSuccessfullMessage);
builder.setPositiveButton(R.string.OK, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
Intent redirect = new Intent(getApplicationContext() , SmartMapMainActivity.class);
startActivity(redirect);
}
});
builder.create().show();
}
else {
AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());
builder.setTitle(R.string.RegisterFailedTitle);
builder.setMessage(R.string.RegisterFailedMessage);
builder.create().show();
}
}
}
The RequestHandler class :
public class RequestHandler {
public boolean register(String userName , String email , String password) {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("http://127.0.0.1/users/");
try {
JSONObject jsonObj = new JSONObject();
jsonObj.put("username", userName);
jsonObj.put("email", email);
jsonObj.put("password", password);
StringEntity entity = new StringEntity(jsonObj.toString());
entity.setContentType("application/json");
httpPost.setEntity(entity);
HttpResponse response = httpClient.execute(httpPost);
if(response.getStatusLine().getStatusCode() == 200)
return true;
else
return false;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return false;
}
}
The problem is, DefaultHttpClient's connManager(ClientConnectionManager) is always null and on the execute() method of the HttpClient, it always throws an IOException. I tried initializing the DefaultHttpClient in my activity , rather than in the AsyncTask's doInBackground method , but the result was the same.

Android - android.os.NetworkOnMainThreadException when acess Http client [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
android.os.NetworkOnMainThreadException
When I run the my android application, I got android.os.NetworkOnMainThreadException, what is the reason for that.how do I fix It.this is my code
public class Login extends Activity {
private Button btnLogin;
private EditText txtusername;
private EditText txtPassword;
public String username;
public String password;
public boolean doLogin = false;
Intent intent;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.login);
btnLogin = (Button) findViewById(R.id.btnLogin);
txtusername = (EditText) findViewById(R.id.txtuserName);
txtPassword = (EditText) findViewById(R.id.txtPassword);
btnLogin.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
username = txtusername.getText().toString();
password = txtPassword.getText().toString();
if (username.equals("") || password.equals("")) {
AlertDialog alert = new AlertDialog.Builder(Login.this)
.create();
alert.setMessage("Username or Password can not be Empty");
alert.setButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
}
});
alert.setIcon(R.drawable.loginlogo);
alert.show();
}
else {
HttpAsync httpasync = new HttpAsync();
httpasync.execute(new String[] { "http://www.diskonbanget.com/bni/login/login.php" });
}
}
});
}
private class HttpAsync extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... params) {
String str = null;
try {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(
"http://www.diskonbanget.com/bni/login/login.php");
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
2);
nameValuePairs
.add(new BasicNameValuePair("username", username));
nameValuePairs
.add(new BasicNameValuePair("password", password));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
str = inputStreamToString(response.getEntity().getContent())
.toString();
} catch (Exception e) {
return str;
}
return str;
}
#Override
protected void onPostExecute(String result) {
String str = result;
if (str.toString().equalsIgnoreCase("false")) {
AlertDialog alert = new AlertDialog.Builder(Login.this)
.create();
alert.setMessage("Please enter valid username & Password");
alert.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alert.setIcon(R.drawable.loginlogo);
alert.show();
}
else if (str.toString().equalsIgnoreCase("null")) {
AlertDialog alert = new AlertDialog.Builder(Login.this)
.create();
alert.setMessage("Can not Connect to the server.please make sure your internet is Switch on ");
alert.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alert.setIcon(R.drawable.loginlogo);
alert.show();
}
else {
intent = new Intent(Login.this, MainMenu.class);
intent.putExtra("photo", str);
intent.putExtra("username", str);
getApplicationContext().startActivity(intent);
}
}
}
private StringBuilder inputStreamToString(InputStream is) {
String line = "";
StringBuilder total = new StringBuilder();
// Wrap a BufferedReader around the InputStream
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
// Read response until the end
try {
while ((line = rd.readLine()) != null) {
total.append(line);
}
return total;
} catch (Exception e) {
return null;
}
}
please someone help me.android version3.2, try to run using XOOM2 emulator

The reason is that your login method makes an http connection in the ui thread, you should do it in a separate thread or use an AsynchTask..
You can pass the context to the task, and then:
protected void onPostExecute(Void result) {
Intent showContent = new Intent(context, yourActivity.class);
context.startActivity(showContent);
}

I dont advise it though but you can use this for test. Refer to #imran khan for good practice.
Add this in your onCreate() method to bypass the checking.
if( Build.VERSION.SDK_INT >= 9){
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}