การทำระบบ Login ผ่าน Web Service ด้วย Parse.com

git clone https://github.com/Devahoy/android-login-example.git
git checkout part2

git clone git@github.com:Devahoy/android-login-example.git
git checkout part2

dependencies {
    compile files('libs/Parse-1.5.1.jar')
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
}

package com.devahoy.sample.login;

import android.app.Application;

import com.parse.Parse;

public class MainApplication extends Application {

    private final String APPLICATION_ID = "YOUR_APP_ID";
    private final String CLIENT_KEY = "YOUR_CLIENT_KEY";

    @Override
    public void onCreate() {
        super.onCreate();
        // Add your initialization code here
        Parse.initialize(this, APPLICATION_ID, CLIENT_KEY);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        ...
        android:name=".MainApplication">
        ...
    </application>
</manifest>

package com.devahoy.sample.login.ui;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.devahoy.sample.login.R;
import com.devahoy.sample.login.model.User;


public class LoginActivity extends ActionBarActivity {

    private Button mLogin;
    private EditText mUsername;
    private EditText mPassword;
    private TextView mRegister;
    private Context mContext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_login);
        mContext = this;

        mLogin = (Button) findViewById(R.id.button_login);
        mUsername = (EditText) findViewById(R.id.username);
        mPassword = (EditText) findViewById(R.id.password);
        mRegister = (TextView) findViewById(R.id.register);

        mLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                checkLogin();
            }
        });

        mRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(mContext, RegisterActivity.class);
                startActivity(intent);
            }
        });
    }

    private void checkLogin() {
        String username = mUsername.getText().toString().trim().toLowerCase();
        String password = mPassword.getText().toString().trim();

        User user = new User(username, password);


    }
}

private void checkLogin() {
    String username = mUsername.getText().toString().trim().toLowerCase();
    String password = mPassword.getText().toString().trim();

    ParseUser.logInInBackground(username, password, new LogInCallback() {
        @Override
        public void done(ParseUser user, ParseException e) {
            if (e == null) {
                Intent intent = new Intent(mContext, MainActivity.class);
                startActivity(intent);
                finish();
            } else {
                Toast.makeText(getApplicationContext(),
                        e.getMessage(),
                        Toast.LENGTH_LONG).show();
            }
        }
    });
}

ParseUser user = new ParseUser();
user.setUsername("my name");
user.setPassword("my pass");

user.signUpInBackground(new SignUpCallback() {
  public void done(ParseException e) {
    if (e == null) {
        // completed.
    } else {
        // some errors.
    }
  }
});

package com.devahoy.sample.login.ui;

import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.devahoy.sample.login.R;

public class RegisterActivity extends ActionBarActivity {

    private EditText mUsername;
    private EditText mPassword;
    private EditText mConfirmPassword;
    private Button mRegister;

    private Context mContext;

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

        mContext = this;

        mUsername = (EditText) findViewById(R.id.username);
        mPassword = (EditText) findViewById(R.id.password);
        mConfirmPassword = (EditText) findViewById(R.id.confirm_password);
        mRegister = (Button) findViewById(R.id.button_register);

        mRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String username = mUsername.getText().toString().trim().toLowerCase();
                String password = mPassword.getText().toString();
                String confirmPassword = mConfirmPassword.getText().toString();

                if (password.equals(confirmPassword)) {


                } else {
                    String message = getString(R.string.register_password_error);
                    Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show();
                }

            }
        });
    }

}

 mRegister.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {

        String username = mUsername.getText().toString().trim().toLowerCase();
        String password = mPassword.getText().toString();
        String confirmPassword = mConfirmPassword.getText().toString();

        if (password.equals(confirmPassword)) {
            ParseUser user = new ParseUser();
            user.setUsername(username);
            user.setPassword(password);

            user.signUpInBackground(new SignUpCallback() {
                @Override
                public void done(ParseException e) {
                    if (e == null) {
                        // Register Completed!
                        finish();
                    } else {
                        // Some Errors!
                    }
                }
            });

        } else {
            String message = getString(R.string.register_password_error);
            Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show();
        }
    }
});

package com.devahoy.sample.login.ui;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.devahoy.sample.login.R;
import com.parse.ParseException;
import com.parse.ParseUser;
import com.parse.RequestPasswordResetCallback;

public class MainActivity extends ActionBarActivity {

    Button mChangePassword;
    TextView mUsername;

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

        mChangePassword = (Button) findViewById(R.id.change_password);
        mUsername = (TextView) findViewById(R.id.say_hi);

        ParseUser user = ParseUser.getCurrentUser();
        mUsername.setText(getString(R.string.say_hi) + " " + user.getUsername());

        mChangePassword.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialogPassword();
            }
        });
    }
    ...
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent">
    <EditText
        android:id="@+id/email_address"
        android:inputType="textEmailAddress"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="4dp"
        android:layout_marginLeft="4dp"
        android:layout_marginRight="4dp"
        android:layout_marginBottom="16dp"
        android:hint="@string/email_address"/>
</LinearLayout>

<resources>
    <string name="email_address">Email Address</string>
</resources>

private void showDialogPassword() {
    AlertDialog.Builder builder =
            new AlertDialog.Builder(MainActivity.this);
    LayoutInflater inflater = getLayoutInflater();
    View view = inflater.inflate(R.layout.dialog, null);

    final EditText emailAddress = (EditText) view.findViewById(R.id.email_address);
    builder.setView(view);

    builder.setPositiveButton(getString(android.R.string.ok),
            new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            String email = emailAddress.getText().toString();
            if(!TextUtils.isEmpty(email)) {

                ParseUser.requestPasswordResetInBackground(email,
                    new RequestPasswordResetCallback() {
                        public void done(ParseException e) {
                            if (e == null) {
                                Toast.makeText(getApplicationContext(),
                                        getString(R.string.change_password_message),
                                        Toast.LENGTH_SHORT).show();
                                goToLogin();
                            } else {
                                Toast.makeText(getApplicationContext(),
                                        e.getMessage(),
                                        Toast.LENGTH_SHORT).show();
                            }
                        }
                });
            }
        }
    });
    builder.setNegativeButton(getString(android.R.string.cancel), null);
    builder.show();
}