Ich habe eine Anmeldeaktivität für meine Android-App erstellt. Nachdem der Benutzer die korrekten Anmeldeinformationen eingegeben hat, wechselt die Anmeldeaktivität zur Startseite. Ich weiß jedoch nicht, warum sich mein Code nicht ändert und in meinem Logcat kein Fehler angezeigt wird. Das Manifest wurde auch richtig definiert.

Dies ist meine Login-Aktivität:

public class LoginEmployerActivity extends Activity { 
Button btnLoginEmployer; 
Button btnLinkToEmployerRegisterScreen; 
EditText inputEmail; 
EditText inputPassword; 
TextView loginErrorMsg; 
TextView forgotPassword; 

// JSON Response node names 
private static String KEY_SUCCESS = "success"; 
private static String KEY_ERROR = "error"; 
private static String KEY_ERROR_MSG = "error_msg"; 
private static String KEY_UID = "uid"; 
private static String KEY_NAME = "name"; 
private static String KEY_CNAME = "cname"; 
private static String KEY_EMAIL = "email"; 
private static String KEY_CREATED_AT = "created_at"; 
private ProgressDialog pDialog; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.login_employer); 

// Importing all assets like buttons, text fields 
inputEmail = (EditText) findViewById(R.id.loginEmployerEmail); 
inputPassword = (EditText) findViewById(R.id.loginEmployerPassword); 
btnLoginEmployer = (Button) findViewById(R.id.btnLoginEmployer); 
btnLinkToEmployerRegisterScreen = (Button) findViewById(R.id.btnLinkToEmployerRegisterScreen); 
loginErrorMsg = (TextView) findViewById(R.id.login_error); 
forgotPassword = (TextView) findViewById(R.id.link_to_forgetPassword); 

// Login button Click Event 
btnLoginEmployer.setOnClickListener(new View.OnClickListener() { 

    public void onClick(View view) { 
        // Checking for server respond 
            new LoginEmployer().execute(); 
        } 
    } 
}); 

// Link to Register Screen 
btnLinkToEmployerRegisterScreen 
        .setOnClickListener(new View.OnClickListener() { 

            public void onClick(View view) { 
                Intent i = new Intent(getApplicationContext(), 
                        RegisterEmployerActivity.class); 
                startActivity(i); 
                finish(); 
            } 
        }); 

// Link to forgot password link 
forgotPassword.setOnClickListener(new View.OnClickListener() { 
    public void onClick(View view) { 
        // Switching to forgot password screen 
        Intent i = new Intent(getApplicationContext(), 
                ForgotPasswordEmployerActivity.class); 
        startActivity(i); 
    } 
}); 
} 

// Background ASYNC Task to login by making HTTP Request 
class LoginEmployer extends AsyncTask<String, String, String> { 

// Before starting background thread Show Progress Dialog 
@Override 
protected void onPreExecute() { 
    super.onPreExecute(); 
    pDialog = new ProgressDialog(LoginEmployerActivity.this); 
    pDialog.setMessage("Authenticating..."); 
    pDialog.setIndeterminate(false); 
    pDialog.setCancelable(false); 
    pDialog.show(); 
} 

// Checking login in background 
protected String doInBackground(String... params) { 
    runOnUiThread(new Runnable() { 
        public void run() { 

            String email = inputEmail.getText().toString(); 
            String password = inputPassword.getText().toString(); 
            EmployerFunctions employerFunctions = new EmployerFunctions(); 
            JSONObject json = employerFunctions.loginUser(email, 
                    password); 

            // check for login response 
            try { 
                if (json.getString(KEY_SUCCESS) != null) { 
                    loginErrorMsg.setText(""); 
                    String res = json.getString(KEY_SUCCESS); 
                    if (Integer.parseInt(res) == 1) { 
                        // user successfully logged in 
                        // Store user details in SQLite Database 
                        DatabaseHandlerEmployer dbe = new DatabaseHandlerEmployer( 
                                getApplicationContext()); 
                        JSONObject json_user = json 
                                .getJSONObject("user"); 

                        // Clear all previous data in database 
                        employerFunctions 
                                .logoutUser(getApplicationContext()); 
                        dbe.addUser( 
                                json_user.getString(KEY_NAME), 
                                //json_user.getString(KEY_CNAME), 
                                json_user.getString(KEY_EMAIL), 
                                json.getString(KEY_UID), 
                                json_user.getString(KEY_CREATED_AT)); 
                        // Launch Employer homePage Screen 
                        Intent homepage = new Intent( 
                                getApplicationContext(), 
                                HomepageEmployerActivity.class); 

                        // Close all views before launching Employer 
                        // homePage 
                        homepage.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
                        startActivity(homepage); 

                        // Close Login Screen 
                        finish(); 
                    } else { 
                        // Error in login 
                        loginErrorMsg 
                                .setText("Invalid username/password"); 
                    } 
                } 
            } 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(); 
} 
} 
}

BEARBEITETER CODE NACH BEWEGUNG DER ABSICHT AUF ONPOSTEXECUTE-METHODE

public class LoginEmployerActivity extends Activity {
Button btnLoginEmployer;
Button btnLinkToEmployerRegisterScreen;
EditText inputEmail;
EditText inputPassword;
TextView loginErrorMsg;
TextView forgotPassword;

// JSON Response node names
private static String KEY_SUCCESS = "success";
private static String KEY_ERROR = "error";
private static String KEY_ERROR_MSG = "error_msg";
private static String KEY_UID = "uid";
private static String KEY_NAME = "name";
private static String KEY_CNAME = "cname";
private static String KEY_EMAIL = "email";
private static String KEY_CREATED_AT = "created_at";
private ProgressDialog pDialog;

boolean loginVerify= false;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.login_employer);

    // Importing all assets like buttons, text fields
    inputEmail = (EditText) findViewById(R.id.loginEmployerEmail);
    inputPassword = (EditText) findViewById(R.id.loginEmployerPassword);
    btnLoginEmployer = (Button) findViewById(R.id.btnLoginEmployer);
    btnLinkToEmployerRegisterScreen = (Button) findViewById(R.id.btnLinkToEmployerRegisterScreen);
    loginErrorMsg = (TextView) findViewById(R.id.login_error);
    forgotPassword = (TextView) findViewById(R.id.link_to_forgetPassword);

    // Login button Click Event
    btnLoginEmployer.setOnClickListener(new View.OnClickListener() {

        public void onClick(View view) {
            // Checking for server respond
                new LoginEmployer().execute();
            }
        }
    });

    // Link to Register Screen
    btnLinkToEmployerRegisterScreen
            .setOnClickListener(new View.OnClickListener() {

                public void onClick(View view) {
                    Intent i = new Intent(getApplicationContext(),
                            RegisterEmployerActivity.class);
                    startActivity(i);
                    finish();
                }
            });

    // Link to forgot password link
    forgotPassword.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            // Switching to forgot password screen
            Intent i = new Intent(getApplicationContext(),
                    ForgotPasswordEmployerActivity.class);
            startActivity(i);
        }
    });
}

// Background ASYNC Task to login by making HTTP Request
class LoginEmployer extends AsyncTask<String, String, String> {

    // Before starting background thread Show Progress Dialog
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(LoginEmployerActivity.this);
        pDialog.setMessage("Authenticating...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(false);
        pDialog.show();
    }

    // Checking login in background
    protected String doInBackground(String... params) {
        runOnUiThread(new Runnable() {
            public void run() {

                String email = inputEmail.getText().toString();
                String password = inputPassword.getText().toString();
                EmployerFunctions employerFunctions = new EmployerFunctions();
                JSONObject json = employerFunctions.loginUser(email,
                        password);

                // check for login response
                try {
                    if (json.getString(KEY_SUCCESS) != null) {
                        loginErrorMsg.setText("");
                        String res = json.getString(KEY_SUCCESS);
                        if (Integer.parseInt(res) == 1) {
                            loginVerify = true;
                            // user successfully logged in
                            // Store user details in SQLite Database
                            DatabaseHandlerEmployer dbe = new DatabaseHandlerEmployer(
                                    getApplicationContext());
                            JSONObject json_user = json
                                    .getJSONObject("user");

                            // Clear all previous data in database
                            employerFunctions
                                    .logoutUser(getApplicationContext());
                            dbe.addUser(
                                    json_user.getString(KEY_NAME),
                                    json_user.getString(KEY_CNAME),
                                    json_user.getString(KEY_EMAIL),
                                    json.getString(KEY_UID),
                                    json_user.getString(KEY_CREATED_AT));

                        } else {
                            // Error in login
                            loginErrorMsg
                                    .setText("Invalid username/password");
                        }
                    }
                } 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();
        if ( loginVerify == true ) 
        {
        // Launch Employer homePage Screen
        Intent homepage = new Intent(getApplicationContext(),
                HomepageEmployerActivity.class);

        // Close all views before launching Employer
        // homePage
        homepage.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(homepage);

        // Close Login Screen
        finish();
        }
    }
}

}