1

我开发了一个android应用程序......这是一个应用程序的第一页......它有两个按钮......注册和登录..当用户第一次进入时,他需要注册,当按下注册时注册过程将开始...用户必须提供用户名、密码和手机号码..一旦他提供所有这些,将生成一个密码并将发送到手机号码,前提是用户必须输入收到的密码以及用户名和密码注册...一旦他注册..他可以使用用户名和密码登录。所有这些部分都工作正常......我的要求是限制注册只有1个用户名......所以一次下载一个用户名是允许的......在一次注册后,注册选项必须停用......所以我必须为此..我正在给出代码..下面...

主要活动

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;

public class MainActivity extends Activity {


     Button btnSignIn,btnSignUp;
    LoginDataBaseAdapter loginDataBaseAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



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


        btnSignIn=(Button)findViewById(R.id.buttonSignIn);
        btnSignUp=(Button)findViewById(R.id.buttonSignUP);



        btnSignUp.setOnClickListener(new View.OnClickListener() {

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

                Intent intentSignUP=new Intent(getApplicationContext(),SignUPActivity.class);
                startActivity(intentSignUP);

            }
        });
    }

    public void signIn(View V)
    {
         final Dialog dialog = new Dialog(MainActivity.this);
         dialog.setContentView(R.layout.login);
         dialog.setTitle("Login");

         // get the References of views
         final  EditText editTextUserName=(EditText)dialog.findViewById(R.id.editTextUserNameToLogin);
         final  EditText editTextPassword=(EditText)dialog.findViewById(R.id.editTextPasswordToLogin);
         final  EditText editTextMobileNumber = (EditText)dialog.findViewById(R.id.editText1);


         Button btnSignIn=(Button)dialog.findViewById(R.id.buttonSignIn);


         btnSignIn.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"); 




                // check if the Stored password matches with  Password entered by user
                if(password.equals(storedPassword) && (mobileNumber.equals(sd))) 
                {
                    Toast.makeText(MainActivity.this, "Congrats: Login Successfull", Toast.LENGTH_LONG).show();
                    dialog.dismiss();
                }
                else
                {
                    Toast.makeText(MainActivity.this, "User Name or Password does not match", Toast.LENGTH_LONG).show();
                }

            }
        });


         dialog.show();
    }

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

注册活动

import java.util.Random;
import java.util.StringTokenizer;

import android.app.Activity;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class SignUPActivity extends Activity

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


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



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

        // 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() {

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



            String userName=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, MainActivity.class);

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



            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(userName.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(userName, password);
                Toast.makeText(getApplicationContext(), "Account Successfully Created and the passcode is sent to the mobile number you provided. ", Toast.LENGTH_LONG).show();






            }
        }
    });
}










    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();
    }



}

LoginDataBaseAdapter.java

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;

public class LoginDataBaseAdapter {

    static final String DATABASE_NAME = "login.db";
    static final int DATABASE_VERSION = 1;
    public static final int NAME_COLUMN = 1;
    // TODO: Create public field for each column in your table.
    // SQL Statement to create a new database.
    static final String DATABASE_CREATE = "create table "+"LOGIN"+
                                 "( " +"ID"+" integer primary key autoincrement,"+ "USERNAME  text,PASSWORD text); ";
    // Variable to hold the database instance
    public  SQLiteDatabase db;
    // Context of the application using the database.
    private final Context context;
    // Database open/upgrade helper
    private DataBaseHelper dbHelper;
    public  LoginDataBaseAdapter(Context _context) 
    {
        context = _context;
        dbHelper = new DataBaseHelper(context, DATABASE_NAME, null, DATABASE_VERSION);
    }
    public  LoginDataBaseAdapter open() throws SQLException 
    {
        db = dbHelper.getWritableDatabase();
        return this;
    }
    public void close() 
    {
        db.close();
    }

    public  SQLiteDatabase getDatabaseInstance()
    {
        return db;
    }

    public void insertEntry(String userName,String password)
    {
       ContentValues newValues = new ContentValues();
        // Assign values for each row.
        newValues.put("USERNAME", userName);
        newValues.put("PASSWORD",password);

        // Insert the row into your table
        db.insert("LOGIN", null, newValues);
        ///Toast.makeText(context, "Reminder Is Successfully Saved", Toast.LENGTH_LONG).show();
    }
    public int deleteEntry(String UserName)
    {
        //String id=String.valueOf(ID);
        String where="USERNAME=?";
        int numberOFEntriesDeleted= db.delete("LOGIN", where, new String[]{UserName}) ;
       // Toast.makeText(context, "Number for Entry Deleted Successfully : "+numberOFEntriesDeleted, Toast.LENGTH_LONG).show();
        return numberOFEntriesDeleted;
    }    
    public String getSinlgeEntry(String userName)
    {
        Cursor cursor=db.query("LOGIN", null, " USERNAME=?", new String[]{userName}, null, null, null);
        if(cursor.getCount()<1) // UserName Not Exist
        {
            cursor.close();
            return "NOT EXIST";
        }
        cursor.moveToFirst();
        String password= cursor.getString(cursor.getColumnIndex("PASSWORD"));
        cursor.close();
        return password;                
    }
    public void  updateEntry(String userName,String password)
    {
        // Define the updated row content.
        ContentValues updatedValues = new ContentValues();
        // Assign values for each row.
        updatedValues.put("USERNAME", userName);
        updatedValues.put("PASSWORD",password);

        String where="USERNAME = ?";
        db.update("LOGIN",updatedValues, where, new String[]{userName});               
    }        

}
4

2 回答 2

2

为了简单

只需获取LOGIN表的计数。如果它返回 1,则隐藏SignUp按钮,否则显示SignUP按钮。使用以下代码行获取表的总数。

活动中

 if(loginDataBaseAdapter.getUsercount()==1){
          btnSignUp.setVisibility(View.INVISIBLE);
 }

在数据库中

   public long getUsercount() { 
        return DatabaseUtils.queryNumEntries(db, "LOGIN");
    } 

它应该工作。

于 2013-10-03T08:23:41.880 回答
1

一种快速简单的方法是使用带有值的“标记”,指示他们是否创建了帐户。您可以使用布尔值或整数。

所以你的编程逻辑会这样:

主要活动

import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;

public class MainActivity extends Activity {


 Button btnSignIn,btnSignUp;
LoginDataBaseAdapter loginDataBaseAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) 
{

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);



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


    btnSignIn=(Button)findViewById(R.id.buttonSignIn);
    btnSignUp=(Button)findViewById(R.id.buttonSignUP);



    btnSignUp.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            if(getValue("registrationComplete"==1){
               Toast.makeText(getApplicationContext(), "You already have registered.",
                Toast.LENGTH_LONG).show(); }
           else{
                Intent intentSignUP = new
            Intent(getApplicationContext(),SignUPActivity.class);
            startActivity(intentSignUP);
                  }
        }
    });
}

public void signIn(View V)
{
     final Dialog dialog = new Dialog(MainActivity.this);
     dialog.setContentView(R.layout.login);
     dialog.setTitle("Login");

     // get the References of views
     final  EditText editTextUserName=(EditText)dialog.findViewById(R.id.editTextUserNameToLogin);
     final  EditText editTextPassword=(EditText)dialog.findViewById(R.id.editTextPasswordToLogin);
     final  EditText editTextMobileNumber = (EditText)dialog.findViewById(R.id.editText1);


     Button btnSignIn=(Button)dialog.findViewById(R.id.buttonSignIn);


     btnSignIn.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"); 




            // check if the Stored password matches with  Password entered by user
            if(password.equals(storedPassword) && (mobileNumber.equals(sd))) 
            {
                Toast.makeText(MainActivity.this, "Congrats: Login Successfull", Toast.LENGTH_LONG).show();
                dialog.dismiss();
            }
            else
            {
                Toast.makeText(MainActivity.this, "User Name or Password does not match", Toast.LENGTH_LONG).show();
            }

        }
    });


     dialog.show();
}
public int getValue(String name) {
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    return prefs.getInt(name, 0);
    }

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

唱歌活动

import android.content.SharedPreferences;
import java.util.Random;
import java.util.StringTokenizer;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle; 
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class SignUPActivity extends Activity
{
EditText editTextUserName,editTextPassword,editTextConfirmPassword, editMobileNumber;
Button btnCreateAccount;


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



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

    // 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() {

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



        String userName=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, MainActivity.class);

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



        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(userName.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(userName, password);
            // Set value of registrationComplete to 1 to indicate its done.
            setValue("registrationComplete",1);
            Toast.makeText(getApplicationContext(), "Account Successfully Created and the passcode is sent to the mobile number you provided. ", Toast.LENGTH_LONG).show();






        }
    }
});
}

public void setValue(String name, int newValue) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = prefs.edit();
editor.putInt(name, newValue);
editor.commit();
}

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();
}
于 2013-10-03T07:23:47.070 回答