Registration Page

Registration Page

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+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.v7.app.ActionBarActivity;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+public class Login extends ActionBarActivity {
+
+public static android.content.SharedPreferences SharedPreferences = null;
+
+private static final String PREFER_NAME = null;
+
+Button buttonLogin;
+
+EditText txtUsername, txtPassword;
+
+// User Session Manager Class
+UserSession session;
+
+@Override
+public void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.login); 
+
+    Button switchButton = (Button)findViewById(R.id.buttonReg);
+    switchButton.setOnClickListener (new View.OnClickListener() {
+
+        @Override
+        public void onClick(View v) {
+            Intent intent=new Intent(Login.this, Reg.class);
+            startActivity(intent);
+
+        }
+    });
+
+
+    // User Session Manager
+    session = new UserSession(getApplicationContext());                
+
+    // get Email, Password input text
+    txtUsername = (EditText) findViewById(R.id.txtUsername);
+    txtPassword = (EditText) findViewById(R.id.txtPassword); 
+
+    Toast.makeText(getApplicationContext(), 
+            "User Login Status: " + session.isUserLoggedIn(), 
+            Toast.LENGTH_LONG).show();
+
+
+    // User Login button
+    buttonLogin = (Button) findViewById(R.id.buttonLogin);
+
+    SharedPreferences = getSharedPreferences(PREFER_NAME, Context.MODE_PRIVATE);
+
+
+    // Login button click event
+    buttonLogin.setOnClickListener(new View.OnClickListener() {
+
+        @Override
+        public void onClick(View arg0) {
+
+            // Get username, password from EditText
+            String username = txtUsername.getText().toString();
+            String password = txtPassword.getText().toString();
+
+            // Validate if username, password is filled             
+            if(username.trim().length() > 0 && password.trim().length() > 0){
+
+                if (SharedPreferences.contains("name"))
+                  {
+                     String uName = (SharedPreferences).getString("name", "");
+
+                  }
+
+                  if (SharedPreferences.contains("email"))
+                  {
+                     String uEmail = (SharedPreferences).getString("email", "");
+
+                  }
+
+                            Object uName = null;
+                            Object uEmail = null;
+                            if(username.equals(uName) && password.equals(uEmail)){
+
+                                session.createUserLoginSession(uName, 
+                                   uEmail);
+
+                                // Starting MainActivity
+                                Intent i = new  Intent(getApplicationContext(),MainActivity.class);
+                                i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+
+                                // Add new Flag to start new Activity
+                                i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                                startActivity(i);
+
+                                finish();
+
+                            }else{
+
+                                // username / password doesn't match&
+                                Toast.makeText(getApplicationContext(), 
+                                  "Username/Password is incorrect",
+                                        Toast.LENGTH_LONG).show();
+
+                            }               
+                        }else{
+
+                            // user didn't entered username or password
+                            Toast.makeText(getApplicationContext(), 
+                                 "Please enter username and password",
+                                      Toast.LENGTH_LONG).show();
+
+                        }
+
+                    }
+                });
+}
+    public boolean onCreateOptionsMenu(Menu menu) {
+        MenuInflater inflater = new MenuInflater(this);
+        inflater.inflate(R.menu.main, menu);
+        return true;
+    }
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+    int id = item.getItemId();
+        switch (id) {
+        case R.id.MENU_1:
+            Intent intent1 = new Intent(this, Login.class);
+            this.startActivity(intent1);
+            break;
+        case R.id.MENU_2:
+            Intent intent2 = new Intent(this, MainActivity.class);
+            this.startActivity(intent2);
+        break;
+        default:
+            return super.onOptionsItemSelected(item);
+        }
+
+        return true;
+    }