how to create log in page in android app? [closed]

问题

I am new in android. I am developing android application for mobile. I want to save user name and password on server side when first time user use my app on mobile and also authenticate that user name and password with user name and password on my website. And if user do not registered on my website immediate signup button to redirect control to my website. I do not know how to implement this. I know its not good question. But i am in trouble. Please someone help me.

Thanks in Advance...

If someone have some code to explain me i am very thankful...

回答1:

This tutorial will walk you through everything you need to know about creating a registration/login authentication.

回答2:

Use OAuth to securely send username & password to your server & receive back response...As Facebook, Google, Twitter are using OAuth to Authenticate Users...

OAUth 1.0 - http://oauth.net/
OAuth 2.0 - http://oauth.net/2/

OAuth 2.0 Tutorials

http://tutorials.jenkov.com/oauth2/index.html

http://net.tutsplus.com/tag/oauth-2-0/

You can use Below steps to securely Authenticate Users in your android App with HTTP Post Request to your PHP server.

Create HTTP Post request & send username & password with HTTP request to your server

 public void postData() {
   // Create a new HttpClient and Post Header
   HttpClient httpclient = new DefaultHttpClient();
   HttpPost httppost = new HttpPost("http://www.yoursite.com/script.php");

   try {
      // Add your data
      List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
      nameValuePairs.add(new BasicNameValuePair("username", "12345"));
      nameValuePairs.add(new BasicNameValuePair("password", "12345676890"));
      httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

    // Execute HTTP Post Request
    HttpResponse response = httpclient.execute(httppost);
    BufferedReader reader = new BufferedReader(new      InputStreamReader(response.getEntity().getContent(), "UTF-8"));
    StringBuilder builder = new StringBuilder();
    for (String line = null; (line = reader.readLine()) != null;) {
        builder.append(line).append("\n");
    }
    builder.toString();
    //Use builder.toString() to see output

    } catch (ClientProtocolException e) {
      // TODO Auto-generated catch block
    } catch (IOException e) {
    // TODO Auto-generated catch block
  }
}

Receive username & password in script.php file on your server

below code is for mysql database -

if(isset($_POST)){
   $username = $_POST['username'];
   $password = $_POST['password'];

//Connect to your database & check if above values exists in your user database or not     
$host="localhost"; // Host name 
$username="root"; // Mysql username 
$password=""; // Mysql password 
$db_name="test"; // Database name 
$tbl_name="members"; // Table name 

// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");


  // To protect MySQL injection (more detail about MySQL injection)
  $username = stripslashes($myusername);
  $password = stripslashes($mypassword);
  $username = mysql_real_escape_string($username);
  $password = mysql_real_escape_string($password);
  $sql="SELECT * FROM $tbl_name WHERE username='$username' and     password='$password'";
  $result=mysql_query($sql);

  // Mysql_num_row is counting table row
  $count=mysql_num_rows($result);

  // If result matched $username and $password, table row must be 1 row
  if($count==1){

   //echo back the success string with code in JSON or any other format
   echo "SUCCESS:User is registered";
  }
  else {
     echo "FAILURE:Wrong Username or Password";
     }
  }

Parse out response from HTTP request in your Android Activity & based on response check if user is registered or not

Parse response from this line..
HttpResponse response = httpclient.execute(httppost);

BufferedReader reader = new BufferedReader(new      InputStreamReader(response.getEntity().getContent(), "UTF-8"));
StringBuilder builder = new StringBuilder();
for (String line = null; (line = reader.readLine()) != null;) {
     builder.append(line).append("\n");
}
builder.toString();
 //Use builder.toString() to see output

来源：https://stackoverflow.com/questions/18917620/how-to-create-log-in-page-in-android-app

标签

android

mysql

database