java - Android 应用程序登录和登录问题

Question

我正在开发一个 Android 应用程序，其中有一个登录和注册选项。当新用户第一次进入应用程序时，他需要注册。当他按下登录选项时，他将被定向到帐户创建页面。他需要在其中提供用户名、密码和手机号码。所有这三个值都存储在 sqlite(应用程序内存)中，并创建一个密码并将其发送到用户提供的手机号码。下一页是注册页面，其中检查用户的用户名和密码以及他收到的密码。我执行此过程是为了验证手机号码。所以我的问题是，如果用户创建帐户并返回登录选项并输入用户名和密码..他将定向到应用程序首页...因为当帐户创建过程完成时，他的详细信息将保存在应用程序中数据库进行验证。所以用户不需要验证密码..那么有什么方法可以让登录按钮仅在注册过程后查看..或类似的东西...我在这里发布 siginactivity、signupactivity 和注册 Activity ..请检查如果发现任何错误请帮助我...

注册 Activity

public class SignUpActivity extends Activity

{

    EditText editTextUserName,editTextPassword,editTextConfirmPassword, editMobileNumber;
    Button btnCreateAccount;



    // Progress Dialog
        private ProgressDialog pDialog;

        JSONParser jsonParser = new JSONParser();




    Random r = new Random();
    int number =r.nextInt(9999 - 1000) + 1000;



    LoginDataBaseAdapter loginDataBaseAdapter;


private static String url_create_data = "http://iascpl.com/app/create_data1.php";

    // JSON Node names
    private static final String TAG_SUCCESS = "success";



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.signup_xm);



        // get Instance  of Database Adapter
                loginDataBaseAdapter=new LoginDataBaseAdapter(this);
                loginDataBaseAdapter=loginDataBaseAdapter.open();

                // Get References of Views


                editTextUserName=(EditText)findViewById(R.id.editTextUserName);
                editTextPassword=(EditText)findViewById(R.id.editTextPassword);
                editTextConfirmPassword=(EditText)findViewById(R.id.editTextConfirmPassword);
                editMobileNumber = (EditText)findViewById(R.id.mobileNumber);




                btnCreateAccount=(Button)findViewById(R.id.buttonCreateAccount);

                btnCreateAccount.setOnClickListener(new View.OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        // TODO Auto-generated method stub

                        String name=editTextUserName.getText().toString();
                        String password=editTextPassword.getText().toString();
                        String confirmPassword=editTextConfirmPassword.getText().toString();

                        String phoneNo = editMobileNumber.getText().toString();
                        String sms = Integer.toString(number);


                        //Intent intent = new Intent(SignUpActivity.this, RegisterActivity.class);

                        //intent.putExtra("number", sms + "");
                        //startActivity(intent);



                        //new CreateNewProduct().execute();


                        StringTokenizer st=new StringTokenizer(phoneNo,",");
                        while (st.hasMoreElements())

                        {

                            String tempMobileNumber = (String)st.nextElement();
                            if(tempMobileNumber.length()>0 && sms.trim().length()>0) 
                            {
                                sendSMS(tempMobileNumber, sms);

                            }


                            else 

                            {

                                Toast.makeText(getBaseContext(), 
                                        "Please enter both phone number and message.", 
                                        Toast.LENGTH_SHORT).show();
                            }





                        }








                        // check if any of the fields are vacant
                        if(name.equals("")||password.equals("")||confirmPassword.equals(""))
                        {
                                Toast.makeText(getApplicationContext(), "Field Vaccant", Toast.LENGTH_LONG).show();
                                return;
                        }
                        // check if both password matches
                        if(!password.equals(confirmPassword))
                        {
                            Toast.makeText(getApplicationContext(), "Password does not match", Toast.LENGTH_LONG).show();
                            return;
                        }
                        else
                        {
                            // Save the Data in Database
                           loginDataBaseAdapter.insertEntry(name, password);
                          Toast.makeText(getApplicationContext(), "Passcode is sent to the mobile number you provided. ", Toast.LENGTH_LONG).show();     


                            new CreateNewProduct().execute();

                           // Intent intent = new Intent(SignUpActivity.this, RegisterActivity.class);

                          //  intent.putExtra("number", sms + "");
                           // startActivity(intent);



                        }







                    }
                });

    }









    private void sendSMS(String phoneNumber, String message)
    {
        String SENT = "SMS_SENT";
        String DELIVERED = "SMS_DELIVERED";

        PendingIntent sentPI = PendingIntent.getBroadcast(this, 0,
            new Intent(SENT), 0);

        PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
            new Intent(DELIVERED), 0);

      //---when the SMS has been sent---
        registerReceiver(new BroadcastReceiver(){
            @Override
            public void onReceive(Context arg0, Intent arg1) {
                switch (getResultCode())
                {
                    case Activity.RESULT_OK:
                        Toast.makeText(getBaseContext(), "SMS sent", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                        Toast.makeText(getBaseContext(), "Generic failure", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_NO_SERVICE:
                        Toast.makeText(getBaseContext(), "No service", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_NULL_PDU:
                        Toast.makeText(getBaseContext(), "Null PDU", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_RADIO_OFF:
                        Toast.makeText(getBaseContext(), "Radio off", 
                                Toast.LENGTH_SHORT).show();
                        break;
                }
            }
        },new IntentFilter(SENT));

        //---when the SMS has been delivered---
        registerReceiver(new BroadcastReceiver(){
            @Override
            public void onReceive(Context arg0, Intent arg1) {
                switch (getResultCode())
                {
                    case Activity.RESULT_OK:
                        Toast.makeText(getBaseContext(), "SMS delivered", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case Activity.RESULT_CANCELED:
                        Toast.makeText(getBaseContext(), "SMS not delivered", 
                                Toast.LENGTH_SHORT).show();
                        break;                        
                }
            }
        }, new IntentFilter(DELIVERED));        

        SmsManager sms = SmsManager.getDefault();
        sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);       


    }













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

        loginDataBaseAdapter.close();
    }



    /**
     * Background Async Task to Create new product
     * */
    class CreateNewProduct extends AsyncTask<String, String, String> {

        /**
         * Before starting background thread Show Progress Dialog
         * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(SignUpActivity.this);
            pDialog.setMessage("Creating a new account..");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        /**
         * Creating product
         * */
        protected String doInBackground(String... args) {





            String name = editTextUserName.getText().toString();
            String password = editTextPassword.getText().toString();
            String mobile = editMobileNumber.getText().toString();
            String sms = Integer.toString(number);

            // Building Parameters
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("name", name));
            params.add(new BasicNameValuePair("password", password));
            params.add(new BasicNameValuePair("mobile", mobile));

            // getting JSON Object
            // Note that create product url accepts POST method
            JSONObject json = jsonParser.makeHttpRequest(url_create_data,
                    "POST", params);

            // check log cat fro 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(SignUpActivity.this, RegisterActivity.class);

                    i.putExtra("number", sms + "");
                    startActivity(i);

                    //closing this screen
                    //finish();
                } else {
                    // failed to create product
                    return "false";



                }



            } catch (JSONException e) {
                e.printStackTrace();
            }

            return null;
        }

        /**
         * After completing background task Dismiss the progress dialog
         * **/
        /*protected void onPostExecute(String file_url) {
            // dismiss the dialog once done
            pDialog.dismiss();
        }*/


        protected void onPostExecute(String result)

        {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
                        if (result == "false")
            Toast.makeText(SignUpActivity.this, "User Name already exists. Please choose another user name ", Toast.LENGTH_LONG).show();
                        pDialog.dismiss();

        }


    }





}

注册 Activity

public class RegisterActivity extends Activity {


    LoginDataBaseAdapter loginDataBaseAdapter;
    Button btnReg;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.register_xm);


        loginDataBaseAdapter=new LoginDataBaseAdapter(this);
        loginDataBaseAdapter=loginDataBaseAdapter.open();



        btnReg = (Button) findViewById (R.id.buttonRegister);

        final  EditText editTextUserName=(EditText)findViewById(R.id.editTextUserNameToLogin);
        final  EditText editTextPassword=(EditText)findViewById(R.id.editTextPasswordToLogin);
        final  EditText editTextMobileNumber = (EditText)findViewById(R.id.editText1);



        btnReg.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub


                String userName=editTextUserName.getText().toString();
                String password=editTextPassword.getText().toString();
                String mobileNumber = editTextMobileNumber.getText().toString();

                // fetch the Password form database for respective user name
                String storedPassword=loginDataBaseAdapter.getSinlgeEntry(userName);



                String sd = getIntent().getStringExtra("number"); 
                String name = editTextUserName.getText().toString();



                // check if the Stored password matches with  Password entered by user
                if(password.equals(storedPassword) && (mobileNumber.equals(sd))) 
                {
                    Toast.makeText(RegisterActivity.this, "Congrats: Registration Successfull", Toast.LENGTH_LONG).show();


                    Intent in = new Intent(RegisterActivity.this,HomePageActivity.class);
                    startActivity(in);



                }
                else
                {
                    Toast.makeText(RegisterActivity.this, "User Name, Passcode or Password does not match", Toast.LENGTH_LONG).show();
                }


            }
        });


    }







@Override
protected void onDestroy() 
     {
    super.onDestroy();
    // Close The Database
    loginDataBaseAdapter.close();

      }
    }

登录 Activity

public class SignInActivity extends Activity 


{
    /*LoginDataBaseAdapter loginDataBaseAdapter;*/
    Button btnsignin;
    EditText username,userpassword;

    TextView txtName;


    // Progress Dialog
    private ProgressDialog pDialog;

    // JSON parser class
    JSONParser jsonParser = new JSONParser();



    // single product url
    private static String url_get_name = "http://iascpl.com/app/get_name_details.php";


    // JSON Node names
    private static final String TAG_SUCCESS = "success";
    private static final String TAG_PRODUCT = "product";
    private static final String TAG_PASSWORD = "password";


    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.signin_xm);


        /*loginDataBaseAdapter=new LoginDataBaseAdapter(this);
        loginDataBaseAdapter=loginDataBaseAdapter.open();*/

        btnsignin = (Button) findViewById ( R.id.button401);
        username=(EditText)findViewById(R.id.editText401);
        userpassword=(EditText)findViewById(R.id.editText402);


        btnsignin.setOnClickListener(new View.OnClickListener() 

        {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub




                new GetProductDetails().execute();

               /* String storedPassword=loginDataBaseAdapter.getSinlgeEntry(userName);*/


                 // check if the Stored password matches with  Password entered by user
                /*if(password.equals(storedPassword)) 
                {
                    Toast.makeText(SignInActivity.this, "Login Successfull", Toast.LENGTH_LONG).show();


                    Intent i = new Intent(SignInActivity.this,HomePageActivity.class);
                    startActivity(i);




                }
                else
                {
                    Toast.makeText(SignInActivity.this, "User Name or Password does not match", Toast.LENGTH_LONG).show();
                }*/



            }
        });
    }



        class GetProductDetails extends AsyncTask<String, String, String> {

            /**
             * Before starting background thread Show Progress Dialog
             * */
            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                pDialog = new ProgressDialog(SignInActivity.this);
                pDialog.setMessage("Loading the result... Please wait...");
                pDialog.setIndeterminate(false);
                pDialog.setCancelable(true);
                pDialog.show();
            }

            /**
             * Getting product details in background thread
             * */
            protected String doInBackground(String... args) 


            {
                String pid=username.getText().toString();











                            // Building Parameters
                            List<NameValuePair> params = new ArrayList<NameValuePair>();
                            params.add(new BasicNameValuePair("pid", pid));





                            // getting product details by making HTTP request
                            // Note that product details url will use GET request
                            JSONObject json = jsonParser.makeHttpRequest(
                                    url_get_name, "GET", params);



                            // check your log for json response
                            Log.d("Single Product Details", json.toString());


                            // json success tag

                            try {
                            int success = json.getInt(TAG_SUCCESS);

                            if (success == 1) {
                                // successfully received product details
                                JSONArray productObj = json
                                        .getJSONArray(TAG_PRODUCT); // JSON Array

                                // get first product object from JSON Array
                                final JSONObject product = productObj.getJSONObject(0);

                                txtName = (TextView) findViewById(R.id.textView1);

                                // product with this pid found
                                // Edit Text
                                runOnUiThread(new Runnable() {  
                                    @Override
                                    public void run() 
                                    {
                                        // TODO Auto-generated method stub
                                        try {
                                            txtName.setText(product.getString(TAG_PASSWORD));

                                        } catch (JSONException e) {
                                            // TODO Auto-generated catch block
                                            e.printStackTrace();
                                        }
                                    }
                                });


                            }else{
                                // product with pid not found

                            }
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }




                    return null;
                }


/*
@Override
protected void onDestroy() 
     {
    super.onDestroy();
    // Close The Database
    loginDataBaseAdapter.close();
      }*/


                            /**
                             * After completing background task Dismiss the progress dialog
                             * **/
                            protected void onPostExecute(String result) 
                            {
                                // dismiss the dialog once got all details
                                /*super.onPostExecute(result);
                                if (result == "false")
                                Toast.makeText(SignInActivity.this, "User Name already exists. Please choose another user name ", Toast.LENGTH_LONG).show();*/
                                pDialog.dismiss();
                            }



            }
    }

Answer 1

我理解你的问题...你正在将注册详细信息保存在sqlite中，因此当用户输入用户名和密码时，它会保存在sqlite中，下一步是注册过程，用户必须输入密码..但作为用户名密码保存在 sqlite 用户可以按后退按钮并返回并使用用户名和密码登录，从而避免注册过程...在这里你可以做这样的事情。使用共享首选项

例如:注册成功后在注册页面给出值l。

 SharedPreferences set = getSharedPreferences(PREFS_NAME, 0); 
                        SharedPreferences.Editor ed = set.edit(); 
                        ed.putString("l", "l"); 
                        ed.commit();

并在您的主页中检查该值是否为 l，如果值为 l，则仅使您的登录按钮可见。您可以使用类似的方法使按钮不可见。

btn3.setVisibility(View.INVISIBLE);
                 btn4.setVisibility(View.INVISIBLE);