php - 通过 AsyncTask 登录自动获取先前输入的用户名，密码

Question

我正在使用 php 从 MYSQL 获取用户名和密码...代码没问题，但是当我显示警告栏时，我显示警告栏，你想注销吗？然后我的 LoginActivity 出现在图片中。即使用户输入了错误的用户名或密码，也会获取以前的登录数据。这是我的php代码

<?php

    include("db.php");

    include("database.php");

    $uname=$_REQUEST['Username'];

    $upassword=$_REQUEST['Password'];

    if($upassword!='' && $uname!=''){

    $resultFac = SelectSingleRow("FacultyLogin","Password='$upassword' AND Username='$uname'","");

    if($resultFac['FacultyID']!=''){

        $facid= $resultFac['FacultyID'];

        $resultEmp = SelectSingleRow("tblFaculty","ID='$facid'","");

        if($resultFac['ID']!=''){

        $empid= $resultEmp['EmployeeID'];

        $response["Emp_id"]=$empid;

         $response["flag"]=1;

         echo json_encode($response);

        }

    }

    else{

        $response["flag"]=0;

            echo "Please enter correct user name password";

         echo json_encode($response);

    } 

    }else{

        $response["flag"]=0;

         echo json_encode($response);

        echo "Please enter both the fields";

    }

  ?>

和我的登录活动

public class LoginActivity extends Activity {
    int flag;
    int empid;
    String username;
    String password;

    EditText edUsername,edPassword;

    private ProgressDialog pDialog;

    JSONParser jParser = new JSONParser();
    JSONArray jarray;

    ArrayList<HashMap<String, String>> productsList;

    private static String url_faculty_login = "http://10.0.2.2/xyz/login_check.php";
    private static final String TAG_EMPLOYEE = "employee_id";
    private static final String TAG_PID = "pid";
    private static final String TAG_NAME = "name";



    @Override
    public void onCreate(Bundle savedInstanceState) {


        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
    //  setTitleColor(1);

        Intent i=new Intent();


        edUsername=(EditText) findViewById(R.id.edUserName);
        edPassword=(EditText) findViewById(R.id.edPassword);
        String clear="clear";

    }

@Override
protected void onStop() {
    // TODO Auto-generated method stub
    super.onStop();
    LoginActivity.this.finish();
    //  LoginActivity.

}

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


    LoginActivity.this.finish();
}
//onClick login.xml Button
    public void signIn(View view) {
        //call to inner class
        if(edUsername!=null && edPassword!=null )
        {
            new LoadAllProducts().execute();

        }
        else 
        {
            Toast.makeText(getApplicationContext(), "Enter Both Fields", Toast.LENGTH_LONG);

        }
    }

    class LoadAllProducts extends AsyncTask<String, String, String> {
        private static final String Emp_id = "Emp_id";


        public String doInBackground(String... args) {
             username=edUsername.getText().toString();
             password=edPassword.getText().toString();

             List<NameValuePair> params = new ArrayList<NameValuePair>();

            params.add(new BasicNameValuePair("Username", username));
            params.add(new BasicNameValuePair("Password", password));



            JSONObject json = jParser.makeHttpRequest(url_faculty_login, "POST", params);
            Log.d("Username n password: ", json.toString());

            try {
                 flag=json.getInt("flag");
                Log.d("flags",""+flag);
            } catch (JSONException e) {

            e.printStackTrace();
            }

            if(flag==1)
            {           
                try 
                {
                    empid=json.getInt(Emp_id);
                } 
                catch (JSONException e) 
                {
                    e.printStackTrace();
                }
                Intent i=new Intent(getApplicationContext(),ClassActivity.class);
                i.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
                i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                i.putExtra("Emp_id", ""+empid);
                Log.d("Empid",""+empid);

                startActivity(i);
            }
            if(flag==0)
            {
                Intent i=new Intent(getApplicationContext(),InvalidUPLoginActivity.class);

                startActivity(i);
            }
        return null;
    }
}
}

Answer 1

后

  username=edUsername.getText().toString();
  password=edPassword.getText().toString();

  edUsername.setText("");
  edPassword.setText("");