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Socket Exception while trying to connect to TCP Server [duplicate]

This question already has answers here:
How can I fix 'android.os.NetworkOnMainThreadException'?
(66 answers)
Closed 3 years ago.
I'm trying to check if I can establish a connection to my TCP server with this simple method:
public static boolean serverListening()
{
Socket s = null;
try
{
s = new Socket("192.168.42.213", 80);
return true;
}
catch (Exception e)
{
Log.d("SocketException", "Exception",e);
return false;
}
finally
{
if(s != null)
try {s.close();}
catch(Exception e){}
}
}
My server is already working as I'm able to connect to it with chrome inside the emulator so the problem must lie in my code.
Im getting the following exception if I try to run the code:
SocketException
android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1513)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:389)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:230)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:212)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:436)
at java.net.Socket.connect(Socket.java:621)
at java.net.Socket.connect(Socket.java:570)
at java.net.Socket.<init>(Socket.java:450)
at java.net.Socket.<init>(Socket.java:218)
at com.example.batterymonitor.MainActivity.serverListening(MainActivity.java:104)
at com.example.batterymonitor.MainActivity.onCreate(MainActivity.java:58)
at android.app.Activity.performCreate(Activity.java:7136)
at android.app.Activity.performCreate(Activity.java:7127)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Thank you very much for your help!

In android you can't run network related actions on the main thread - you need to run them on a different thread, for example:
Thread mThread = new Thread(new Runnable() {
#Override
public void run() {
try {
//Put your code that you want to run in here(check your connection for example)
} catch (Exception e) {
e.printStackTrace();
}
}
});
mThread.start

android OkHttpClient Requesting Error

I am trying to store some data in mysql database using my android app. I am using okhttp3 to send request , but an error appears to me at this line:
client.newCall(request).execute();
I tried it on local machine and online but it gives me the same error here is the code ,
public class MainActivity extends AppCompatActivity {
String token1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
System.out.println("MainActivity is :" + FirebaseInstanceId.getInstance().getToken());
FirebaseMessaging.getInstance().subscribeToTopic("test");
FirebaseInstanceId.getInstance().getToken();
token1=FirebaseInstanceId.getInstance().getToken();
}
public void clicking(View view) {
OkHttpClient client = new OkHttpClient();
RequestBody body = new FormBody.Builder()
.add("Token",token1)
.build();
okhttp3.Request request = new okhttp3.Request.Builder()
.url("http://saleh923.byethost8.com/hii.html")
.post(body)
.build();
try {
client.newCall(request).execute();
} catch (IOException e) {
e.printStackTrace();
}
}
}
and here is the log:
com.example.user.firebasenot E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.user.firebasenot, PID: 3280
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:5198) 
at android.view.View$PerformClick.run(View.java:21147) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273)
at java.net.InetAddress.lookupHostByName(InetAddress.java:431)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
at java.net.InetAddress.getAllByName(InetAddress.java:215)
at okhttp3.Dns$1.lookup(Dns.java:39)
at okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:172)
at okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.java:138)
at okhttp3.internal.connection.RouteSelector.next(RouteSelector.java:80)
at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:178)
at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:129)
at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:98)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:109)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:124)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:170)
at okhttp3.RealCall.execute(RealCall.java:60)
at com.example.user.firebasenot.MainActivity.clicking(MainActivity.java:54)
at java.lang.reflect.Method.invoke(Native Method) 
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
at android.view.View.performClick(View.java:5198) 
at android.view.View$PerformClick.run(View.java:21147) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

The error message says it all:
Caused by: android.os.NetworkOnMainThreadException
You are not supposed to make network requests on the main (aka UI) thread.
There are many ways in which you can make this request on a different thread, here's one:
final OkHttpClient client = new OkHttpClient();
RequestBody body = new FormBody.Builder()
.add("Token",token1)
.build();
final okhttp3.Request request = new okhttp3.Request.Builder()
.url("http://saleh923.byethost8.com/hii.html")
.post(body)
.build();
final Thread thread = new Thread(new Runnable() {
#Override
public void run() {
try {
client.newCall(request).execute();
} catch (IOException e) {
e.printStackTrace();
}
}
});
But okhttp makes it easier for us to make asynchronous requests using the enqueue method:
client.newCall(request).enqueue(new Callback() {
#Override
public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
#Override
public void onResponse(Call call, final Response response) throws IOException {
if (!response.isSuccessful()) {
throw new IOException("Unexpected code " + response);
}
// you code to handle response
}
);

Here is how you should go about debugging your code:
Your 1st cue in the log that states,
java.lang.IllegalStateException: Could not execute method for
android:onClick
tells you that there is something wrong with you onClick method implementation, which in this case is clicking(View view). You then go on to hunt for your next hint, which is your 2nd cue in the log that states,
Caused by: android.os.NetworkOnMainThreadException
and that certainly is happening in your clicking(View view) method implementation line that you pointed out. It's making a network request from the main thread; and oh!, Android system reckons it a bad thing.
So what is the way out? You can use any of the following alternatives methods:
Alternative 1: View.post(Runnable) or View.postDelayed(Runnable, long)
Alternative 2: Activity.runOnUiThread(Runnable)
Alternative 3: Handler
Alternative 4: AsyncTask
I have demoed each of these alternatives, including the wrong way like the one you showcased in my Github project titled, DemoThreadsAndProcesses. Please feel free to (fork and) download it and play with it to see which implementation alternative suits your interest and go about using it in you own very project.
For quick check, I'll go about implementing your clicking(View view) like below:
public void clicking(View view) {
new MakeNetworkRequestAsyncTask().execute();
}
private void makeNetworkRequest() {
OkHttpClient client = new OkHttpClient();
RequestBody body = new FormBody.Builder()
.add("Token",token1)
.build();
okhttp3.Request request = new okhttp3.Request.Builder()
.url("http://saleh923.byethost8.com/hii.html")
.post(body)
.build();
try {
client.newCall(request).execute();
} catch (IOException e) {
e.printStackTrace();
}
}
private class MakeNetworkRequestAsyncTask extends AsyncTask<Void, Void, Void> {
// The system calls this to perform work in a worker thread and
// delivers it the parameters given to AsyncTask.execute()
protected transient Void doInBackground(Void[] params) {
makeNetworkRequest();
}
// The system calls this to perform work in the UI thread and
// delivers the result from doInBackground() method defined above
#Override
protected void onPostExecute(Void result) {}
}
Hope that helps!

Checking for internet connectivity in Android app [duplicate]

This question already has answers here:
How can I fix 'android.os.NetworkOnMainThreadException'?
(66 answers)
Closed 7 years ago.
I'm trying to check for INTERNET connectivity from an Android app but just keep running in to problems.
I'm NOT looking for code that tests for an available network connection - I've got that bit working - this is to test whether I can reach an internet site or not.
(I appreciate that if I am behind a system which presents a logon screen instead of the requested site, I may not get the exact result I want, but I will handle that later)
Thanks to the following question I think I've made some progress, but when I run the app it crashes out (error info below).
The code I have so far is as follows (and I must admit that I find the try/catch stuff a bit puzzling and tedious :-/ )
static public boolean isInternetReachable() {
int statusCode = -1;
try{
URL url = new URL("http://www.google.com/humans.txt");
HttpURLConnection http = (HttpURLConnection) url.openConnection();
statusCode = http.getResponseCode();
http.disconnect();
} catch (MalformedURLException ex) {
return false;
} catch (IOException ex) {
return false;
}
if (statusCode == HttpURLConnection.HTTP_OK) {
return true;
}
else
{
//connection is not OK
return false;
}
}
I'm sure there are neater ways to do this and so any general advice is welcome.
The error that I'm getting when the app crashes is:
01-24 19:53:14.767 10617-10617/com.nooriginalthought.bluebadgeparking E/AndroidRuntime:
FATAL EXCEPTION: main
Process: com.nooriginalthought.bluebadgeparking, PID: 10617
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nooriginalthought.bluebadgeparking/com.nooriginalthought.bluebadgeparking.PreLoadChecks}: android.os.NetworkOnMainThreadException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2411)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2474)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1359)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:155)
at android.app.ActivityThread.main(ActivityThread.java:5696)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1028)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
Caused by: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1155)
at java.net.InetAddress.lookupHostByName(InetAddress.java:418)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
at java.net.InetAddress.getAllByName(InetAddress.java:215)
at com.android.okhttp.HostResolver$1.getAllByName(HostResolver.java:29)
at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:236)
at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:124)
at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:272)
at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:211)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:373)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:323)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:491)
at com.nooriginalthought.bluebadgeparking.PreLoadChecks.isInternetReachable(PreLoadChecks.java:41)
at com.nooriginalthought.bluebadgeparking.PreLoadChecks.onCreate(PreLoadChecks.java:70)
at android.app.Activity.performCreate(Activity.java:5958)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1129)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2364)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2474) 
at android.app.ActivityThread.access$800(ActivityThread.java:144) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1359) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:155) 
at android.app.ActivityThread.main(ActivityThread.java:5696) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1028) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823) 

As David is mentioning in the comments, you should just Google for the Exception name and try to get a turnaround by yourself.
By looking at the StackOverflow answer that he is referring to, you need to make all network communications outside the Main thread. The most used way to do this is by creating an AsyncTask.
In your case, it would look (you can create a new InternetTask.java or just append it to your current MainActivity.java) something like:
class InternetTask extends AsyncTask<Void, Void, Boolean>{
private MainActivity activity;
InternetTask(MainActivity activity){
this.activity = activity;
}
#Override
protected Boolean doInBackground(Void... params) {
int statusCode = -1;
try{
URL url = new URL("http://www.google.com/humans.txt");
HttpURLConnection http = (HttpURLConnection) url.openConnection();
statusCode = http.getResponseCode();
http.disconnect();
} catch (MalformedURLException ex) {
return false;
} catch (IOException ex) {
return false;
}
if (statusCode == HttpURLConnection.HTTP_OK) {
return true;
}
else
{
//connection is not OK
return false;
}
}
#Override
protected void onPostExecute(Boolean aBoolean) {
super.onPostExecute(aBoolean);
activity.receiveMagic(aBoolean);
}
}
Then, you just need to add a new public method in your activity to receive the boolean in your MainActivity.
public void receiveMagic(Boolean isGood){
if (isGood){
Toast.makeText(MainActivity.this, "It is good", Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(MainActivity.this, "It is not connected", Toast.LENGTH_SHORT).show();
}
}
And you would need to call your new AsyncTask from your Activity with:
new InternetTask(this).execute();
Make sure you add the internet permission to your Manifest also.

Android FTP connection problems [duplicate]

This question already has answers here:
How can I fix 'android.os.NetworkOnMainThreadException'?
(66 answers)
Closed 7 years ago.
Hi I have been trying for two days to get a simple ftp connection to transfer a small xml file. I have tried lots of different examples of code, but all seem to give the same errors.
Main FTP class code:
public class MyFTPClientFunctions {
public FTPClient mFTPClient = null;
public boolean ftpConnect(String host, String username, String password, int port) {
try {
mFTPClient = new FTPClient();
// connecting to the host
mFTPClient.connect(host, port);
// now check the reply code, if positive mean connection success
if (FTPReply.isPositiveCompletion(mFTPClient.getReplyCode())) {
// login using username & password
boolean status = mFTPClient.login(username, password);
mFTPClient.setFileType(FTP.BINARY_FILE_TYPE);
mFTPClient.enterLocalPassiveMode();
return status;
}
//Log.d(TAG, "Error: could not connect to host " + host);
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
private Context getApplicationContext() {
return null;
}
}
Main Activity code to send
send.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//set up FTP file transfer here
MyFTPClientFunctions ftpSend = new MyFTPClientFunctions();
ftpSend.ftpConnect("xxxxxx.asuscomm.com","admin","xxxxxxxxxx",21);
}
LogCat messages
06-22 12:09:21.460 17329-17329/com.example.rats.moham_2 E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.rats.moham_2, PID: 17329
android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1147)
at java.net.InetAddress.lookupHostByName(InetAddress.java:418)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
at java.net.InetAddress.getByName(InetAddress.java:305)
at org.apache.commons.net.SocketClient.connect(SocketClient.java:203)
at com.example.rats.moham_2.MyFTPClientFunctions.ftpConnect(MyFTPClientFunctions.java:25)
at com.example.rats.moham_2.MainActivity$3.onClick(MainActivity.java:155)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

This Exception is usualy thrown, if you are using the network on the main thread.
Please use Async Tasks.

Android HttpClient Asynctask

I have been stuck on this problem for a day or two now, so i decided to see if anyone out there could help me.
The current goal i have, is to make a HttpPost that connects to, and executes a script that i have on my Wamp server. I have implemented a class that extends AsyncTask, and includes the 3 necessary methods, that are required in order for it to work effectively.
I will first show you the code that i have used to put the variables into a Json Object, followed by the JSONParser class, that initializes the HttpPost and then executes it.
Afterwards i will tell you all about the log errors and the narrowing down of the problem; you all problem know what the problem may be already, and if you don't want to read below, briefly, it is caused by the line of code that calls the parser class.
Note: I am using this as a starting point for this type of work, so please understand that it is simple in terms of its passed parameters.
Further Note: I am using Eclipse, and i am testing with the inbuilt Emulator.
METHOD - CreateNewUser
/**
* Background Async Task to Create new user
*/
class CreateNewUser extends AsyncTask<String, String, String>{
/**
* Before starting background thread show progress dialog
*/
#Override
protected void onPreExecute(){
super.onPreExecute();
pDialog = new ProgressDialog(AddUserActivity.this);
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/*
* Creating user
*/
#Override
protected String doInBackground(String... args){
String username = inputUsername.getText().toString();
String password = inputPassword.getText().toString();
// Building parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", username));
params.add(new BasicNameValuePair("password", password));
// getting JSON object
// Note that create user url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_create_user, "POST",params);
// check log cat for response
Log.d("Create Response", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully created product
Intent i = new Intent(getApplicationContext(), MainActivity.class);
startActivity(i);
// closing this screen
finish();
} else {
// failed to create product
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
#Override
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
}
}
Next, the JSONParser Class:
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
// 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 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;
}
}
If i remove the line : ( JSONObject json = jsonParser.makeHttpRequest(url_create_user, "POST",params); ) - of course with intending the try catch out, then the program does not crash, when i press the button that calls the CreateNewUser class.
If i do not do that, my program brings up a loading screen that swirls around until it becomes unresponsive, and asks me to close down the application.
The logs describe Async errors, and illegal state ones:
E/AndroidRuntime(1132): FATAL EXCEPTION: AsyncTask #2
E/AndroidRuntime(1132): Process: com.example.propertypanther, PID: 1132
E/AndroidRuntime(1132): java.lang.RuntimeException: An error occured while executing
doInBackground()
E/AndroidRuntime(1132): at android.os.AsyncTask$3.done(AsyncTask.java:300)
E/AndroidRuntime(1132): at
java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
E/AndroidRuntime(1132): at
java.util.concurrent.FutureTask.setException(FutureTask.java:222)
E/AndroidRuntime(1132): at java.util.concurrent.FutureTask.run(FutureTask.java:242)
E/AndroidRuntime(1132): at
android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
E/AndroidRuntime(1132): at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
E/AndroidRuntime(1132): at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
E/AndroidRuntime(1132): at java.lang.Thread.run(Thread.java:841)
E/AndroidRuntime(1132): Caused by: java.lang.IllegalStateException: Target host must not
be null, or set in parameters. scheme=null, host=null,
path=localhost/android_connect/sqlconfig/create_user.php
E/AndroidRuntime(1132): at
org.apache.http.impl.client.DefaultRequestDirector.determineRoute(DefaultRequestDirector.jav
a:591)
E/AndroidRuntime(1132): at
org.apache.http.impl.client.DefaultRequestDirector.execute
(DefaultRequestDirector.java:293)
E/AndroidRuntime(1132): at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
E/AndroidRuntime(1132): at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
E/AndroidRuntime(1132): at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
E/AndroidRuntime(1132): at
com.example.propertypanther.JSONParser.makeHttpRequest(JSONParser.java:51)
E/AndroidRuntime(1132): at
com.example.propertypanther.AddUserActivity$CreateNewUser.doInBackground
(AddUserActivity.java:116)
E/AndroidRuntime(1132): at
com.example.propertypanther.AddUserActivity$CreateNewUser.doInBackground
(AddUserActivity.java:1)
E/AndroidRuntime(1132): at android.os.AsyncTask$2.call(AsyncTask.java:288)
E/AndroidRuntime(1132): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
E/AndroidRuntime(1132): ... 4 more
I/Choreographer(1132): Skipped 82 frames! The application may be doing too much work on
its main thread.
I/Choreographer(1132): Skipped 58 frames! The application may be doing too much work on
its main thread.
E/WindowManager(1132): android.view.WindowLeaked: Activity
com.example.propertypanther.AddUserActivity has leaked window
com.android.internal.policy.impl.PhoneWindow$DecorView{b1e3d240 V.E..... R.....ID 0,0-
729,192} that was originally added here
E/WindowManager(1132): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:348)
E/WindowManager(1132): at
android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:248)
E/WindowManager(1132): at
android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
E/WindowManager(1132): at android.app.Dialog.show(Dialog.java:286)
E/WindowManager(1132): at
com.example.propertypanther.AddUserActivity$CreateNewUser.onPreExecute
(AddUserActivity.java:97)
E/WindowManager(1132): at
android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
E/WindowManager(1132): at android.os.AsyncTask.execute(AsyncTask.java:535)
E/WindowManager(1132): at
com.example.propertypanther.AddUserActivity$2.run(AddUserActivity.java:78)
E/WindowManager(1132): at android.os.Handler.handleCallback(Handler.java:733)
E/WindowManager(1132): at android.os.Handler.dispatchMessage(Handler.java:95)
E/WindowManager(1132): at android.os.Looper.loop(Looper.java:136)
E/WindowManager(1132): at android.app.ActivityThread.main(ActivityThread.java:5017)
E/WindowManager(1132): at java.lang.reflect.Method.invokeNative(Native Method)
E/WindowManager(1132): at java.lang.reflect.Method.invoke(Method.java:515)
E/WindowManager(1132): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
E/WindowManager(1132): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
E/WindowManager(1132): at dalvik.system.NativeStart.main(Native Method)
The script files themselves work as far as i am aware - besides, the program never executes the script from what i can tell.
If anyone could help me out, i would really appreciate it! I understand you are all busy people, so thank you so much for taking some time out of your day if you do post ideas :)

The clue is in the exception thrown:
Caused by: java.lang.IllegalStateException: Target host must not be
null, or set in parameters. scheme=null, host=null,
path=localhost/android_connect/sqlconfig/create_user.php
I'm going to guess that there is an encoding problem, have you correctly included the "http://" at the beginning of your URL and have you printed the url you are requesting to LogCat to make sure it looks correct?