Question

I am developing a small application and for that authentication is needed. That I’m trying to develop by connecting to MYsql db through php.

add uname/pw –> loging –> send to php –> check db –> ok sends back to android –> authenticated. / error sends back to re loging.

I have developed so far, I think this is how it should be but I’m NOT sure since I’m really new to the cording.
Please be kind enough to help me with cording. Thank you.

public class Loging extends Activity{

    TextView txt;
    EditText uname,pwd;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);

        setContentView(R.layout.loging);
        Button b = (Button)findViewById(R.id.log);
        uname = (EditText)findViewById(R.id.uname);
        pwd = (EditText)findViewById(R.id.pwd);

        b.setOnClickListener(new View.OnClickListener() {

            public void onClick(View arg0) {
                // TODO Auto-generated method stub

                ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();

                    nameValuePairs.add(new BasicNameValuePair("name", uname.getText().toString()));
                    nameValuePairs.add(new BasicNameValuePair("Pass", pwd.getText().toString()));

                    try 
                    {
                     HttpClient httpclient = new DefaultHttpClient();
                     HttpPost httppost = new HttpPost("http://www.helloworld.com/report.php");
                     httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                     HttpResponse response = httpclient.execute(httppost);
                     HttpEntity entity = response.getEntity();
                     InputStream is = entity.getContent();
                    }
                    catch(Exception e)
                    {
                            Log.e("log_tag","Error in http connection"+e.toString());
                    }   
            }
        });
    }
}

Answer 1

public class Loging extends Activity{

    TextView txt;
    EditText uname,pwd;
    final Loging login = this; 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);

        setContentView(R.layout.loging);
        Button loging = (Button)findViewById(R.id.log);
        Button adduser = (Button)findViewById(R.id.adduser);
        uname = (EditText)findViewById(R.id.uname);
        pwd = (EditText)findViewById(R.id.pwd);


        loging.setOnClickListener(new View.OnClickListener() {


            public void onClick(View arg0) {
                // TODO Auto-generated method stub


                // Create a new HttpClient and Post Header
                HttpClient httpclient = new DefaultHttpClient();

                /* login.php returns true if username and password is equal to saranga */
                HttpPost httppost = new HttpPost("http://www.xoxoxoxox.com/login.php");

                try {
                    // Add user name and password
                 EditText uname = (EditText)findViewById(R.id.uname);
                 String username = uname.getText().toString();

                 EditText pword = (EditText)findViewById(R.id.pwd);
                 String password = pword.getText().toString();

                    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
                    Log.w("SENCIDE", "Execute HTTP Post Request");
                    HttpResponse response = httpclient.execute(httppost);

                    String str = inputStreamToString(response.getEntity().getContent()).toString();
                    Log.w("SENCIDE", str);

                    if(str.toString().equalsIgnoreCase("true"))
                    {
                     Log.w("SENCIDE", "TRUE");
                     //result.setText("Login successful");   

                     Intent in = new Intent();
                        in.setClass(login, MappingActivity.class);
                                startActivity(in);
                    }else
                    {
                     Log.w("SENCIDE", "FALSE");
                     AlertDialog alertDialog = new AlertDialog.Builder(Loging.this).create();
                        alertDialog.setTitle("Credentials Missing");
                        alertDialog.setMessage("Please add UserName and Password");
                        alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
                           public void onClick(DialogInterface dialog, int which) {
                              // here you can add functions
                               Intent i = new Intent();
                                i.setClass(login, MappingActivity.class);
                                        startActivity(i);
                           }
                        });
                        alertDialog.show();            
                    }

                } catch (ClientProtocolException e) {
                 e.printStackTrace();
                } catch (IOException e) {
                 e.printStackTrace();
                }


            }

            private Object inputStreamToString(InputStream is) {
                // TODO Auto-generated method stub
                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); 
                  }
                 } catch (IOException e) {
                  e.printStackTrace();
                 }
                 // Return full string
                 return total;
            }
        });

        adduser.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent in = new Intent();
                in.setClass(login, Adduser.class);
                        startActivity(in);
            }
        });




    }

}