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unfortunately android application has been stopped. At Http Post while attempting to call server

Unfortunately android application has been stopped. At Http Post while attempting to call server at post activity please help
HttpClient cli = new DefaultHttpClient();
//HttpPost post = new HttpPost("http://" + sp.getString("ip", "localhost") + "/attendance/cliLogin.php");
HttpPost post = new HttpPost("localhost/attendance/");
// seting post data
List<NameValuePair> loginData = new ArrayList<NameValuePair>(2);
loginData.add(new BasicNameValuePair("uname", uname));
loginData.add(new BasicNameValuePair("pass", pass));
post.setEntity(new UrlEncodedFormEntity(loginData));
// executing login
HttpResponse res = cli.execute(post);
HttpEntity resent = res.getEntity();
String result = EntityUtils.toString(resent);
// reading response
if(result.equals("NoParams"))
Commons.showToast("Something went wrong", true);
else if(result.equals("Login"))
{
navi = new Intent(this, HomeActivity.class);
startActivity(navi);
}
else
Commons.showToast(result, true);
}
catch (HttpHostConnectException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Commons.showToast("Can't reach server, check the Hostname", true);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else
Commons.showToast("Username/Password can't be empty", true);
}
}

Could you please share your logcat to see the error? I think that your are calling the php script in your main thread (that is your activity thread) and you may have NetworkOnMainThreadException
If that is the case:
Create a class that extends the AsyncTask.
Override its methods.
In the creator of this class pass the variables and assign them to the fields (variables) of your class.
Make your post in an AsyncTask inside the doInBackground method
And call the AsyncTask execute. Like this:
public class MyTask extends AsyncTask<String,String,String>{
private short errorType = -1;
private String result;
private String uname;
private String pass;
public MyTask(String uname, String pass){
this.uname = uname;
this.pass = pass;
}
#Override
protected String onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (errorType == 1){
Commons.showToast("Can't reach server, check the Hostname", true);
}
if(result.equals("NoParams")) {
Commons.showToast("Something went wrong", true); }
else if(result.equals("Login")) {
Intent navi = new Intent(this, HomeActivity.class); startActivity(navi);
}
else {
Commons.showToast(result, true);
}
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
}
#Override
protected String doInBackground(String... params) {
try
{
HttpClient cli = new DefaultHttpClient();
HttpPost post = new HttpPost("localhost/attendance/");
List<NameValuePair> loginData = new ArrayList<NameValuePair>(2);
loginData.add(new BasicNameValuePair("uname", uname));
loginData.add(new BasicNameValuePair("pass", pass));
post.setEntity(new UrlEncodedFormEntity(loginData));
// executing login
HttpResponse res = cli.execute(post);
HttpEntity resent = res.getEntity();
return result = EntityUtils.toString(resent);
}
catch (HttpHostConnectException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
errorType = 1;
return null;
}
catch (ParseException e) {
// TODO Auto-generated catch block e.printStackTrace();
errorType = 2;
return null;
}
catch (IOException e) {
// TODO Auto-generated catch block e.printStackTrace();
errorType = 3;
return null;
}
catch(Exception e){
errorType = 4;
return null;
}
}
}
And inside the activity make your call like this:
MyTask new MyTask(uname, pass).execute();
Again. All this is applicable only if you have
NetworkOnMainThreadException
Please share your logcat for further help.

Why does my json result only shows one record in textview?

I am new to android and stuck with the following problem. This is my async task and I want to show result in next activity. I am getting the whole result in the console but in textview, it only shows the last name.
private class MyTask extends AsyncTask<String, String, String>{
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
try{
String link = "http://www.amtechnologies.org/emergency/get_medicine.php";
HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost();
request.setURI(new URI(link));
List<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("disease_name", result2));
System.out.println("Result2:"+result2);
UrlEncodedFormEntity form = new UrlEncodedFormEntity(postParameters);
request.setEntity(form);
HttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
String result=EntityUtils.toString(entity);
result1 = result;
System.out.println("Result: "+result);
System.out.println("Result1: "+result1);
Intent i= new Intent(Medicines.this,View_medicines.class);
i.putExtra("result", result.toString());
startActivity(i);
}catch (URISyntaxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}
Next activty :
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_medicines);
mnm=(EditText) findViewById(R.id.m3);
mi=(TextView) findViewById(R.id.m2);
nextbtn=(Button) findViewById(R.id.okmedi);
nextbtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent myIntent = new Intent(View_medicines.this,Homepage.class);
startActivity(myIntent);
finish();
}
});
try {
Intent intent = getIntent();
String jsonArray=intent.getStringExtra("result");
jArray = new JSONArray(jsonArray);
System.out.println("Universe Acitivy Json Array: "+jArray);
for(int i=0;i<jArray.length();i++){
String names=new JSONObject(jArray.getString(i)).get("medicine_name").toString();
System.out.println(names+"");
mnm.setText(names);
mi.setText(""+new JSONObject(jArray.getString(i)).get("medicine_intake"));
Toast.makeText(getApplicationContext(),""+new JSONObject(jArray.getString(i)).get("medicine_name").toString(), Toast.LENGTH_SHORT).show();
}
int SDK_INT = android.os.Build.VERSION.SDK_INT;
if (SDK_INT > 8)
{
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

Change this part
for(int i=0;i<jArray.length();i++){
String names=new JSONObject(jArray.getString(i)).get("medicine_name").toString();
System.out.println(names+"");
mnm.setText(names);
mi.setText(""+new JSONObject(jArray.getString(i)).get("medicine_intake"));
Toast.makeText(getApplicationContext(),""+new JSONObject(jArray.getString(i)).get("medicine_name").toString(), Toast.LENGTH_SHORT).show();
}
to following
for(int i=0;i<jArray.length();i++){
String names=new JSONObject(jArray.getString(i)).get("medicine_name").toString();
System.out.println(names+"");
mnm.append(names);
mi.append(""+new JSONObject(jArray.getString(i)).get("medicine_intake"));
Toast.makeText(getApplicationContext(),""+new JSONObject(jArray.getString(i)).get("medicine_name").toString(), Toast.LENGTH_SHORT).show();
}

fetching the values from web api to andorid spinner

here my code for fetching values from web api. in my code no error is there. but in emulator doesn't show the values. please tell me where i done a mistake. let me know what is the correct code for that.
public class MainActivity extends ActionBarActivity {
Spinner sp1;
String url1=" http://www.cartrade.com/testmobileapplication/GetTopCitiesList.php? app_id=<random number>&action=Get Cities";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Spinner sp1=(Spinner)findViewById(R.id.spinner1);
}
public class Mysync extends AsyncTask<List<String>, List<String>, List<String>>{
#Override
protected List<String> doInBackground(List<String>... arg0) {
// TODO Auto-generated method stub
HttpClient httpclient = new DefaultHttpClient();
// Prepare a request object
HttpGet httpget = new HttpGet(url1);
// Execute the request
HttpResponse response;
JSONArray arr = new JSONArray();
try {
response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
if (entity != null && response.getStatusLine().getStatusCode() == 200) {
// A Simple JSON Response Read
InputStream instream = entity.getContent();
String result = convertStreamToString(instream);
arr=new JSONArray(result);
instream.close();
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
// Log.e(TAG,e.toString());
} catch (IOException e) {
// TODO Auto-generated catch block
// Log.e(TAG,e.toString());
} catch (JSONException e) {
// TODO Auto-generated catch block
//Log.e(TAG,e.toString());
}
List<String> list = new ArrayList<String>();
for(int i = 0; i < arr.length(); i++){
try {
list.add(arr.getJSONObject(i).getString("name"));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return list;
}
protected void onPostExecute(List<String> result){
sp1=(Spinner)findViewById(R.id.spinner1);
ArrayAdapter<String> adapter=new ArrayAdapter<String>(getApplicationContext(), R.layout.support_simple_spinner_dropdown_item);
sp1.setAdapter(adapter);
}
}
public String convertStreamToString(InputStream is) {
// TODO Auto-generated method stub
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) {
// Log.e(TAG + "ERROR",e.toString());
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
// Log.e(TAG + "ERRO",e.toString());
}
}
return sb.toString();
}
}

Define List under the line
String url1=" http://www.cartrade.com/testmobileapplication/GetTopCitiesList.php? app_id=&action=Get Cities";
like : List<String> list ;
And Try to Change the line
List list = new ArrayList();
Via
list = new ArrayList();
and Change
ArrayAdapter<String> adapter=new ArrayAdapter<String>(getApplicationContext(), R.layout.support_simple_spinner_dropdown_item);
Via
ArrayAdapter<String> adapter=new ArrayAdapter<String>(getApplicationContext(), R.layout.support_simple_spinner_dropdown_item,result);
Hope this may help you!

Taking Values from JSON

I am new in android.I need to take values from web service.Here i used json parsing.The out put Json format is { "flag": 0 }. Here i need to take the value of flag and using that value i want to start another method. How do i take the value of flag. please help me. I used in this way.
public String objectvalue(String result){
try {
JSONObject obj=new JSONObject(result);
String flag=obj.getString("flag");
mString=flag;
System.out.println(mString);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return mString;
}
But i didnot get the value of flag.Here argument result is output from the server.ie,result={ "flag": 0 }

First of all, where is the declaration of mString variable? I assume it is declared as instance variable in your java class having this method, if not please check.
You have a well formed JSON in the form of
{ "flag": 0 }
so converting it to a JSONObject should work perfectly.
For extracting value of flag key
There is key named flag in this JSONObject which has an Integer value and you are trying to extract it using getString() method.
You should be using either of the following methods calls
optInt(String key)
Get an optional int value associated with a key, or zero if there is no such key or if th value is not a number. If the value is a string, an attempt will be made to evaluate it as a number.
int flag = optInt("flag");
OR
optInt(String key, int defaultValue)
Get an optional int value associated with a key, or the default if there is no such key or if the value is not a number. If the value is a string, an attempt will be made to evaluate it as a number.
int flag = optInt("flag", 0);
Your code with changes
public int objectValue(String result){
int flag = 0;
try {
JSONObject obj=new JSONObject(result);
flag = obj.optInt("flag");
} catch (JSONException e) {
e.printStackTrace();
}
return flag;
}
Edit: Answer to question in comment.
public String objectValue(String result){
int flag = 0;
try {
JSONObject obj=new JSONObject(result);
flag = obj.optInt("flag");
} catch (JSONException e) {
e.printStackTrace();
}
return String.valueOf(flag);
}
Hope this helps.

You may try using AsyncTask for your concern. It's best and preffered way to fetch JSON data
Define AsyncTask like this ..
new BussinessOwnerHttpAsyncTask().execute();
and your AsyncTask class ..
class BussinessOwnerHttpAsyncTask extends AsyncTask<String, Void, String> {
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
// Progress dialog code goes over here ..
pDialog = new ProgressDialog(getParent());
pDialog.setMessage("Please wait ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected String doInBackground(String... params) {
// Maintaining Shared preferences class for further...
HttpClient httpclient = new DefaultHttpClient();
String myUrl = Your_url_goes_over_here;
String encodedURL = "";
try {
encodedURL = URLEncoder.encode(myUrl, "UTF-8");
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
URL url = new URL(encodedURL);
Log.d("asca", ""+url);
} catch (MalformedURLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
Log.i("url", city_name + "~" + country_name);
Log.d("location", request_url+encodedURL);
HttpGet httpget = new HttpGet(request_url+encodedURL);
try {
httpresponse = httpclient.execute(httpget);
System.out.println("httpresponse" + httpresponse);
Log.i("response", "Response" + httpresponse);
InputStream is = httpresponse.getEntity().getContent();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
String recievingDataFromServer = null;
while ((recievingDataFromServer = br.readLine()) != null) {
Log.i("CHECK WHILE", "CHECK WHILE");
sb.append(recievingDataFromServer);
}
myJsonString = sb.toString();
Log.d("manish", myJsonString);
serverSearchData = sb.toString();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return sb.toString();
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
pDialog.dismiss();
if (myJsonString.length() > 0) {
try {
myJsonObject = new JSONObject(myJsonString);
String your_flag = myJsonObject.getString("flag");
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
Now you are good to go with your queries..

{ // JSONObject
"flag": 0
}
Use
JSONObject obj=new JSONObject(result);
int flag=obj.getInt("flag");
http://developer.android.com/reference/org/json/JSONObject.html
public int getInt (String name)
Added in API level 1
Returns the value mapped by name if it exists and is an int or can be coerced to an int.
Throws
JSONException if the mapping doesn't exist or cannot be coerced to an int.
If this does not work you need to post more info.

the "flag" values format at interger, not string, this is simple code to do that :
int flagValues = jsonObject.getInt("flag");
Log.w("values ",String.valuesOf(flagValues));

Android Strict Mode

I have written a simple code on JSON Parsing using AsyncTask. I'm just displaying the response in TextView. I don't know whether it is right or wrong. Its working on GingerBread and showing NetworkOnMainThreadException on JellyBean. If I use StrictMode, its working on JellyBean and getting force close on GingerBread. How to write the code which support above Android 3.0 and below Android 3.0.
public class MainActivity extends Activity {
TextView tv;
Button b;
InputStream is = null;
DefaultHttpClient client;
HttpGet get;
HttpResponse response;
HttpEntity entity;
StringBuffer buffer;
#SuppressLint("NewApi")
#TargetApi(Build.VERSION_CODES.GINGERBREAD)
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
// StrictMode.setThreadPolicy(policy);
tv = (TextView) findViewById(R.id.texty);
b = (Button) findViewById(R.id.buttonGET);
b.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
MyOperation mytask = new MyOperation();
mytask.execute();
}
});
}
private class MyOperation extends AsyncTask<String, Void, String> {
ProgressDialog dialog = new ProgressDialog(MainActivity.this);
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog.setMessage("Loading...");
dialog.show();
}
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
client = new DefaultHttpClient();
get = new HttpGet("http://www.google.com");
try {
response = client.execute(get);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
entity = response.getEntity();
try {
is = entity.getContent();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
dialog.dismiss();
BufferedReader reader = new BufferedReader(
new InputStreamReader(is));
StringBuffer buffer = new StringBuffer();
String line = null;
do {
try {
line = reader.readLine();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
buffer.append(line);
} while (line != null);
tv.setText(buffer);
}
}
}

public class MainActivity extends Activity {
TextView tv;
Button b;
InputStream is = null;
DefaultHttpClient client;
HttpGet get;
HttpResponse response;
HttpEntity entity;
StringBuffer buffer;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//StrictMode.ThreadPolicy policy = new
// StrictMode.setThreadPolicy(policy);
tv = (TextView) findViewById(R.id.texty);
b = (Button) findViewById(R.id.buttonGET);
b.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
MyOperation mytask = new MyOperation();
mytask.execute();
}
});
}
private class MyOperation extends AsyncTask<String, Void, String> {
ProgressDialog dialog = new ProgressDialog(MainActivity.this);
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog.setMessage("Loading...");
dialog.show();
}
#Override
protected String doInBackground(String... params) {
StringBuffer buffer = new StringBuffer();
// TODO Auto-generated method stub
client = new DefaultHttpClient();
get = new HttpGet("http://www.google.com");
try {
response = client.execute(get);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
entity = response.getEntity();
try {
is = entity.getContent();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
BufferedReader reader = new BufferedReader(
new InputStreamReader(is));
String line = null;
do {
try {
line = reader.readLine();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
buffer.append(line);
} while (line != null);
return buffer.tostring();
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
dialog.dismiss();
tv.setText(result);
}}
}
otherwise you are running the read line operation in main thread

Make the InputStream is and Entity entity local field variables in the doInBackground() as return as result the string that you wanna set on the TextView...and on the onPostExecute() you just get the result (the string) and set it in the TextView straight on.

You should read inputStream data in doInBackground function, not in the onPostExecute. So construct StringBuffer in doInBackground append all lines to it and return StringBuffer.toString as result. In onPostExecute you will get what string as parameter.