Develop Reference

Trying to fetch mysql data in android listview

Hello everyone I am trying to fetch data from mysql database in android ListView,
Following code is throwing java.lang.StringIndexOutOfBoundsException
I am new to Android Development, If anybody could guide me through this it will be much help.
Thank You.
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;
import java.util.ArrayList;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;
import android.os.AsyncTask;
public class Main_catagory_one extends Activity{
Activity context;
HttpPost httppost;
StringBuffer buffer;
HttpResponse response;
HttpClient httpclient;
ProgressDialog pd;
CustomAdapter adapter;
ListView listProduct;
ArrayList<Product> records;
protected void onCreate(Bundle savedInstanceState) {
//TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main1);
context=this;
records=new ArrayList<Product>();
listProduct=(ListView)findViewById(R.id.listView1);
adapter=new CustomAdapter(context, R.layout.list_view,R.id.textView3,
records);
listProduct.setAdapter(adapter);
}
public void onStart(){
super.onStart();
//execute background task
BackTask bt=new BackTask();
bt.execute();
}
//background process to make a request to server and list product information
private class BackTask extends AsyncTask<Void,Void,Void>{
protected void onPreExecute(){
super.onPreExecute();
pd = new ProgressDialog(context);
pd.setTitle("Retrieving data");
pd.setMessage("Please wait.");
pd.setCancelable(true);
pd.setIndeterminate(true);
pd.show();
}
protected Void doInBackground(Void...params){
InputStream is=null;
String result="";
try{
httpclient=new DefaultHttpClient();
httppost= new HttpPost("http://10.0.2.2/fetch_item/getproducts.php");
response=httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
// Get our response as a String.
is = entity.getContent();
}catch(Exception e){
if(pd!=null)
pd.dismiss(); //close the dialog if error occurs
Log.e("ERROR", e.getMessage());
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"),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("ERROR", "Error converting result "+e.toString());
}
//parse json data
try{
// Remove unexpected characters that might be added to beginning of the string
result=result.substring(result.indexOf("["));
JSONArray jArray =new JSONArray(result);
for(int i=0;i<jArray.length();i++){
JSONObject json_data =jArray.getJSONObject(i);
Product p=new Product();
p.setpName(json_data.getString("Item_name"));
p.setuPrice(json_data.getString("Item_price"));
p.setpQauntity(json_data.getString("Item_quantity"));
p.setpImage(json_data.getString("Item_img"));
records.add(p);
}
}
catch(Exception e){
Log.e("ERROR", "Error pasting data "+e.toString());
}
return null;
}
protected void onPostExecute(Void result){
if(pd!=null) pd.dismiss(); //close dialog
Log.e("size", records.size() + "");
adapter.notifyDataSetChanged(); //notify the ListView to get new records
}
}
}

IndexOutOfBoundsException - if beginIndex is negative or larger than
the length of this String object.
You should get used to using the API. It tells you what exceptions a method throws and why.
Try printing length of the string before and after doing substring.
For example...
String testing = "Hello World";
System.out.println("Length of testing = " + testing.length);
System.out.println("Value of testing = " + testing);
testing.substring(1,2);

Authenticate Login to Rest api With single click button

i Edited all my previous question . I solved that long time ago .
but now i am here and just getting all things done :
i have a login activity :
which makes a call to rest api with credentials .
i have created the login activity it works ok but i have to press the button two times in order to perform some action . i think there is a mistake in my code :
here is my login activity ... if anyone can help me in this i will accept it as answer and will close this link on my stickies....
login.java:
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.HttpResponse;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.List;
public class login_act extends Activity {
private ProgressDialog pDialog;
List<NameValuePair> params=null;
static String response = null;
private String url = "http://hostname_ip/rest-api/xxxxx/?format=json";
static String u="";
static String p="";
String temp= "";
// User name
private EditText et_Username;
// Password
private EditText et_Password;
// Sign In
private Button bt_SignIn;
// Message
private TextView tv_Message;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login_layout);
// Initialization
et_Username = (EditText) findViewById(R.id.u_name);
et_Password = (EditText) findViewById(R.id.password);
bt_SignIn = (Button) findViewById(R.id.sign_in);
tv_Message = (TextView) findViewById(R.id.statusop);
bt_SignIn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
// Stores User name
String username = String.valueOf(et_Username.getText());
u=username;
// Stores Password
String password = String.valueOf(et_Password.getText());
p=password;
new Getlogin().execute();
}
});
}
private class Getlogin extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(login_act.this);
pDialog.setMessage("Signing In...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
String credentials = u + ":" + p;
try {
if (params != null) {
String paramString = URLEncodedUtils
.format(params, "utf-8");
url += "?" + paramString;
}
HttpGet httpGet = new HttpGet(url);
String base64EncodedCredentials = Base64.encodeBytes(credentials.getBytes());
httpGet.addHeader("Authorization", "Basic " + base64EncodedCredentials);
httpResponse = httpClient.execute(httpGet);
httpEntity = httpResponse.getEntity();
temp = response = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
try {
pDialog.dismiss();
if(temp.contains("count")){
tv_Message.setText("Logged In");
Intent go = new Intent(login_act.this,Scnd.class);
Bundle extras = new Bundle();
extras.putString("status", response);
extras.putString("user", u);
extras.putString("pass", p);
// 4. add bundle to intent
go.putExtras(extras);
startActivity(go);
finish();
}else
tv_Message.setText("Invalid username or password");
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
}
i only want if user and pass are ok then intent to new activity . if the user pasword are wrong then display response with incorect user password
but the activity performs it by clicking twice a button . i want to make it single click.. any help ?? i would be thankful.

You need to have an installation of Newfies-Dialer in order to use the API, in other words the API url will be the one from your own server.
The documentation clearly say API URL => http://HOSTNAME_IP/rest-api/campaigns/

Android, send string from app to web server

I am trying to make an app where i am supposed to send data from the application to a web server.
So far i've been searching and not been able to find a working example, i've found some using asynctask which does not work, so any help is appreciated!

try below code :-
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONObject;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import com.hmkcode.android.vo.Person;
public class MainActivity extends Activity implements OnClickListener {
TextView tvIsConnected;
EditText etName,etCountry,etTwitter;
Button btnPost;
Person person;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// get reference to the views
tvIsConnected = (TextView) findViewById(R.id.tvIsConnected);
etName = (EditText) findViewById(R.id.etName);
etCountry = (EditText) findViewById(R.id.etCountry);
etTwitter = (EditText) findViewById(R.id.etTwitter);
btnPost = (Button) findViewById(R.id.btnPost);
// check if you are connected or not
if(isConnected()){
tvIsConnected.setBackgroundColor(0xFF00CC00);
tvIsConnected.setText("You are conncted");
}
else{
tvIsConnected.setText("You are NOT conncted");
}
// add click listener to Button "POST"
btnPost.setOnClickListener(this);
}
public static String POST(String url, Person person){
InputStream inputStream = null;
String result = "";
try {
// 1. create HttpClient
HttpClient httpclient = new DefaultHttpClient();
// 2. make POST request to the given URL
HttpPost httpPost = new HttpPost(url);
String json = "";
// 3. build jsonObject
JSONObject jsonObject = new JSONObject();
jsonObject.accumulate("name", person.getName());
jsonObject.accumulate("country", person.getCountry());
jsonObject.accumulate("twitter", person.getTwitter());
// 4. convert JSONObject to JSON to String
json = jsonObject.toString();
// ** Alternative way to convert Person object to JSON string usin Jackson Lib
// ObjectMapper mapper = new ObjectMapper();
// json = mapper.writeValueAsString(person);
// 5. set json to StringEntity
StringEntity se = new StringEntity(json);
// 6. set httpPost Entity
httpPost.setEntity(se);
// 7. Set some headers to inform server about the type of the content
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-type", "application/json");
// 8. Execute POST request to the given URL
HttpResponse httpResponse = httpclient.execute(httpPost);
// 9. receive response as inputStream
inputStream = httpResponse.getEntity().getContent();
// 10. convert inputstream to string
if(inputStream != null)
result = convertInputStreamToString(inputStream);
else
result = "Did not work!";
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
// 11. return result
return result;
}
public boolean isConnected(){
ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Activity.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnected())
return true;
else
return false;
}
#Override
public void onClick(View view) {
switch(view.getId()){
case R.id.btnPost:
if(!validate())
Toast.makeText(getBaseContext(), "Enter some data!", Toast.LENGTH_LONG).show();
// call AsynTask to perform network operation on separate thread
new HttpAsyncTask().execute("http://hmkcode.appspot.com/jsonservlet");
break;
}
}
private class HttpAsyncTask extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... urls) {
person = new Person();
person.setName(etName.getText().toString());
person.setCountry(etCountry.getText().toString());
person.setTwitter(etTwitter.getText().toString());
return POST(urls[0],person);
}
// onPostExecute displays the results of the AsyncTask.
#Override
protected void onPostExecute(String result) {
Toast.makeText(getBaseContext(), "Data Sent!", Toast.LENGTH_LONG).show();
}
}
private boolean validate(){
if(etName.getText().toString().trim().equals(""))
return false;
else if(etCountry.getText().toString().trim().equals(""))
return false;
else if(etTwitter.getText().toString().trim().equals(""))
return false;
else
return true;
}
private static String convertInputStreamToString(InputStream inputStream) throws IOException{
BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
String line = "";
String result = "";
while((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}
}
see below link for more info :-
http://hmkcode.com/android-send-json-data-to-server/
http://androidexample.com/How_To_Make_HTTP_POST_Request_To_Server_-_Android_Example/index.php?view=article_discription&aid=64&aaid=89

Try this,
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;
public class AdminLogin extends Activity {
EditText adminUN, adminPass;
CheckBox cb;
Button loginBtn;
HttpPost httppost;
StringBuffer buffer;
HttpResponse response;
HttpClient httpclient;
List<NameValuePair> nameValuePairs;
// Your IP address or your website complete address
String adminLoginURL = "http://192.168.1.1/admin_login.php";
ProgressDialog dialog = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.admin_login);
loginBtn = (Button) findViewById(R.id.adminLogin);
adminUN = (EditText) findViewById(R.id.adminUName);
adminPass = (EditText) findViewById(R.id.adminPass);
loginBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
new Admin_Login().execute();
}
});
}
class Admin_Login extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(AdminLogin.this);
dialog.setMessage("Please Wait..!");
dialog.setIndeterminate(false);
dialog.setCancelable(true);
dialog.show();
}
protected String doInBackground(String... params) {
new Thread(new Runnable() {
public void run() {
login();
}
}).start();
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once got all details
dialog.dismiss();
}
}
void login() {
try {
httpclient = new DefaultHttpClient();
httppost = new HttpPost(adminLoginURL);
// add your data
nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("username", adminUN
.getText().toString().trim()));
nameValuePairs.add(new BasicNameValuePair("password", adminPass
.getText().toString().trim()));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
response = httpclient.execute(httppost);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpclient.execute(httppost,
responseHandler);
boolean matches = response.startsWith("User Found");
if (matches) {
// Do something start an Activity or do anything you wanted
}
} else {
showAlert();
}
} catch (Exception e) {
dialog.dismiss();
System.out.println("Exception : " + e.getMessage());
}
}
public void showAlert() {
AdminLogin.this.runOnUiThread(new Runnable() {
public void run() {
AlertDialog.Builder builder = new AlertDialog.Builder(
AdminLogin.this);
builder.setTitle("Login Error.");
builder.setMessage("User not Found.")
.setCancelable(false)
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_exit, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.action_exit:
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
Create an .xml file to get the username, password, and login button
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/ic_wall"
android:gravity="center_horizontal"
android:orientation="vertical" >
<EditText
android:id="#+id/adminUName"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_marginTop="50dip"
android:hint="Username"
android:singleLine="true" />
<requestFocus />
<EditText
android:id="#+id/adminPass"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:ems="10"
android:hint="Password"
android:inputType="textPassword"
android:singleLine="true" />
<Button
android:id="#+id/adminLogin"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dip"
android:text="Login"
android:textColor="#0b84aa" />
</LinearLayout>
You must have PhpMyAdmin to try this in local system, if you have hosted server part then try use the following php code and run it.
adminLogin.php
<?php
$hostname_localhost ="";
$database_localhost ="";
$username_localhost ="";
$password_localhost ="";
# Make sure above fields are filled with your config values (must)
$localhost = mysql_connect($hostname_localhost,$username_localhost,$password_localhost)
or
trigger_error(mysql_error(),E_USER_ERROR);
mysql_select_db($database_localhost, $localhost);
if (empty($_POST['username'])) {
echo "Please Enter a name";
} else {
$username = $_POST['username'];
}
if (empty($_POST['password'])) {
echo "Please Enter Your Password ";
} else {
$password = SHA1($_POST['password']);
}
$query_search = "select * from adminregister where username = '".$username."' AND password = '".$password."'";
$query_exec = mysql_query($query_search) or die(mysql_error());
$rows = mysql_num_rows($query_exec);
//echo $rows;
if($rows == 0) {
echo "\nNo Such User Found";
}
else {
echo "User Found";
}
mysql_close();
?>
Note: You need to create database and table specified in mysql to feed and retrieve the data
If any errors please leave a comment.

using AsyncTask i want the data in list view when calling restful api

I just build a demo application through async task and now i want the json data in list view so i dont know where i can add json functions and array list etc so plz guide me or help me by edit the code i thankful in advance and plz help im new to android and java
package your.packag.namespace;
import java.io.IOException;
import java.io.InputStream;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class runActivity extends Activity implements OnClickListener {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.my_button).setOnClickListener(this);
}
#Override
public void onClick(View arg0) {
Button b = (Button)findViewById(R.id.my_button);
b.setClickable(false);
new LongRunningGetIO().execute();
}
private class LongRunningGetIO extends AsyncTask <Void, Void, String> {
protected String getASCIIContentFromEntity(HttpEntity entity) throws IllegalStateException, IOException {
InputStream in = entity.getContent();
StringBuffer out = new StringBuffer();
int n = 1;
while (n>0) {
byte[] b = new byte[4096];
n = in.read(b);
if (n>0) out.append(new String(b, 0, n));
}
return out.toString();
}
#Override
protected String doInBackground(Void... params) {
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpGet httpGet = new HttpGet("http://192.168.1.156/recess/document/document");
HttpClient client = new DefaultHttpClient();
HttpResponse response=null;
try{
response = client.execute(httpGet);}
catch(Exception e){}
System.out.println(response.getStatusLine());
String text = null;
try {
response = httpClient.execute(httpGet, localContext);
HttpEntity entity = response.getEntity();
text = getASCIIContentFromEntity(entity);
} catch (Exception e) {
return e.getLocalizedMessage();
}
return text;
}
protected void onPostExecute(String results) {
if (results!=null) {
EditText et = (EditText)findViewById(R.id.my_edit);
et.setText(results);
}
Button b = (Button)findViewById(R.id.my_button);
b.setClickable(true);
}
}}

You can use the built-in org.json classes to convert the retrieved string (your text variable content) in to JSON objects.
Have a look at the tutorial from Lars Vogel on how to do that.

http request and http response in android?

I am working on with:
org.apache.http.HttpResponse;
org.apache.http.client.HttpClient;
org.apache.http.client.methods.HttpGet;
org.apache.http.impl.client.DefaultHttpClient;
i am using jsp for writing server side code.
i am unaware of the procedure of sending some value to server from my emulator.
and get a value o a string from the server response.
I mean to say... what are the methods to be used? How to use them.?

To send a HTTP GET request and retrieve response:
private static void get(final Context context, final String url) {
new Thread() {
#Override
public void run() {
HttpClient client = new DefaultHttpClient();
HttpGet request = Utils.createHttpRequest(context, url, true, false);
setProxyIfNecessary(context, request);
try {
HttpResponse response = client.execute(request);
Log.v("Test", "StatusCode: " + response.getStatusLine().getStatusCode() + ", Entity: " + EntityUtils.toString(response.getEntity()));
} catch (Exception e) {
// Oh, crash
}
}
}.start();
}
private static void setProxyIfNecessary(Context context, HttpUriRequest request) {
ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivity == null ? null : connectivity.getActiveNetworkInfo();
if (networkInfo == null || networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
return;
}
String proxyHost = Proxy.getHost(context);
if (proxyHost == null) {
return;
}
int proxyPort = Proxy.getPort(context);
if (proxyPort < 0) {
return;
}
HttpHost proxy = new HttpHost(proxyHost, proxyPort);
ConnRouteParams.setDefaultProxy(request.getParams(), proxy);
}
Call it by:
get(context, "http://developer.android.com/index.html");
And you will get log by logcat *:S Test:V
Notice that the new thread is to avoid blocking UI thread

Below is a code i implemented for sending username and password from android to server side JSP page. The response from the server is a json object which is then processed.The code is as given below.
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Login_Menu extends Activity {
EditText usname;
EditText pass;
TextView tv;
HttpClient client;
HttpPost post;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login_lay);
tv=(TextView) findViewById(R.id.login_stat_tv);
usname=(EditText)findViewById(R.id.uname);
pass=(EditText)findViewById(R.id.pass);
Button login=(Button)findViewById(R.id.login_but);
Button cancel=(Button)findViewById(R.id.cancel_but);
client = new DefaultHttpClient();
String url="http://10.0.2.2:7001/proj/login.jsp";
post = new HttpPost(url);
login.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
new login().execute("");
}
});
cancel.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
usname.getText().clear();
pass.getText().clear();
}
});
}
private class login extends AsyncTask<String, Void, JSONObject>{
ProgressDialog dialog = ProgressDialog.show(Login_Menu.this, "", "Authenticating, Please wait...");
#Override
protected JSONObject doInBackground(String... params) {
Log.i("thread", "Doing Something...");
//authentication operation
try{
List<NameValuePair> pairs = new ArrayList<NameValuePair>();
pairs.add(new BasicNameValuePair("username",usname.getText().toString()));
pairs.add(new BasicNameValuePair("password",pass.getText().toString()));
post.setEntity(new UrlEncodedFormEntity(pairs));
HttpResponse response = client.execute(post);
int status=response.getStatusLine().getStatusCode();
if(status == 200)
{
HttpEntity e=response.getEntity();
String data=EntityUtils.toString(e);
JSONObject last=new JSONObject(data);
return last;
}
}
catch(Exception e)
{
e.printStackTrace();
}
return null;
}
protected void onPreExecute(){
//dialog.dismiss();
Log.i("thread", "Started...");
dialog.show();
}
protected void onPostExecute(JSONObject result){
Log.i("thread", "Done...");
String status;
String name;
try {
status= result.getString("status");
name=result.getString("uname");
if(dialog!=null)
{
dialog.dismiss();
}
else{}
if(status.equalsIgnoreCase("yes"))
{
tv.setText("Login Successful...");
Bundle newbundle=new Bundle();
newbundle.putString("uname",name);
Intent myIntent=new Intent(Login_Menu.this,Instruction.class);
myIntent.putExtras(newbundle);
startActivity(myIntent);
}
else{
tv.setText("No User Found, please try again!");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}