Wie kann ich mich anmelden, um das erste Mal in Android zu bestätigen?

Question

Ich entwickle eine App, in der ein Login-Bildschirm für den Benutzer sichtbar ist, in dem ich drei Details wie mobile, password und isfirstLogin an den Server senden muss, wenn der Benutzer sich zum ersten Mal anmeldet, dann einige Aktivitäten anzeigt und dann die Anmeldeaktivität anzeigt . Bitte hilf mir, wie ich dieses Problem lösen kann.

public class CLoginScreen extends Fragment { 
public static String s_szLoginUrl = "http://577.168.0.110:8080/ireward/rest/json/metallica/getLoginInJSON"; 
public static String s_szresult = " "; 
public static String s_szMobileNumber, s_szPassword; 
public static String s_szResponseMobile, s_szResponsePassword; 
public View m_Main; 
public EditText m_InputMobile, m_InputPassword; 
public AppCompatButton m_loginBtn; 
public ProgressDialog m_PDialog; 
public CJsonsResponse m_oJsonsResponse; 
public boolean isFirstLogin; 
public JSONObject m_oResponseobject; 
public Snackbar m_SnackBar; 
public LinearLayout m_MainLayout; 
public AppCompatButton m_RegisterBtn; 
public CLoginSessionManagement m_oLoginSession; 

@Nullable 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    m_Main = inflater.inflate(R.layout.login_screen, container, false); 
    ((AppCompatActivity) getActivity()).getSupportActionBar().hide(); 
    m_oLoginSession = new CLoginSessionManagement(getActivity()); 
    Toast.makeText(getActivity(), "User Login Status: " + m_oLoginSession.isLogin(), Toast.LENGTH_LONG).show(); 


    init(); 
    return m_Main; 
} 

public void init() { 
    m_MainLayout = (LinearLayout) m_Main.findViewById(R.id.mainLayout); 

    m_InputMobile = (EditText) m_Main.findViewById(R.id.input_mobile); 
    m_InputPassword = (EditText) m_Main.findViewById(R.id.input_password); 

    m_loginBtn = (AppCompatButton) m_Main.findViewById(R.id.btn_Login); 
    m_RegisterBtn = (AppCompatButton) m_Main.findViewById(R.id.btn_Register); 
    m_RegisterBtn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.container, new CRegistrationScreen()).commit(); 
     } 
    }); 
    m_loginBtn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      new LoginAttempt().execute(); 
     } 
    }); 
} 

private class LoginAttempt extends AsyncTask<String, Void, String> { 
    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     m_PDialog = new ProgressDialog(getActivity()); 
     m_PDialog.setMessage("Please wait while Registering..."); 
     m_PDialog.setCancelable(false); 
     m_PDialog.show(); 
    } 

    @Override 
    protected String doInBackground(String... params) { 
     getLoginDetails();// getting login details from editText........... 
     InputStream inputStream = null; 
     m_oJsonsResponse = new CJsonsResponse(); 
     isFirstLogin = true; 
     try { 
      // 1. create HttpClient 
      HttpClient httpclient = new DefaultHttpClient(); 
      // 2. make POST request to the given URL 
      HttpPost httpPost = new HttpPost(s_szLoginUrl); 
      String json = ""; 
      // 3. build jsonObject 
      JSONObject jsonObject = new JSONObject(); 
      jsonObject.put("agentCode", s_szMobileNumber); 
      jsonObject.put("pin", s_szPassword); 
      jsonObject.put("firstloginflag", m_oLoginSession.isLogin()); 
      // 4. convert JSONObject to JSON to String 
      json = jsonObject.toString(); 
      // 5. set json to StringEntity 
      StringEntity se = new StringEntity(json); 
      // 6. set httpPost Entity 
      httpPost.setEntity(se); 
      // 7. Set some headers to inform server about the type of the content 
      // httpPost.setHeader("Accept", "application/json"); ///not required 
      httpPost.setHeader("Content-type", "application/json"); 
      // 8. Execute POST request to the given URL 
      HttpResponse httpResponse = httpclient.execute(httpPost); 
      HttpEntity entity = httpResponse.getEntity(); 
      // 9. receive response as inputStream 
      inputStream = entity.getContent(); 
      System.out.print("InputStream...." + inputStream.toString()); 
      System.out.print("Response...." + httpResponse.toString()); 

      StatusLine statusLine = httpResponse.getStatusLine(); 
      System.out.print("statusLine......" + statusLine.toString()); 
      ////Log.d("resp_body", resp_body.toString()); 
      int statusCode = statusLine.getStatusCode(); 
      if (statusCode == 200) { 
       // 10. convert inputstream to string 
       if (inputStream != null) { 
        s_szresult = m_oJsonsResponse.convertInputStreamToString(inputStream); 
        //String resp_body = 
        EntityUtils.toString(httpResponse.getEntity()); 
       } 
      } else 
       s_szresult = "Did not work!"; 

     } catch (Exception e) { 
      Log.d("InputStream", e.getLocalizedMessage()); 
     } 
     System.out.println("s_szResult....." + s_szresult); 
     System.out.println("password......" + s_szPassword); 
     // 11. return s_szResult 
     return s_szresult; 
    } 

    @Override 
    protected void onPostExecute(String response) { 
     super.onPostExecute(response); 
     m_PDialog.dismiss(); 

     try { 
      m_oResponseobject = new JSONObject(response);// getting response from server 
      new Thread() {// making child thread... 
       public void run() { 
        Looper.prepare(); 
        try { 
         if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Transaction Successful")) { 
          m_oLoginSession.setLoginData(s_szResponseMobile, s_szResponsePassword); 
         } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Agentcode Can Not Be Empty")) { 
          m_SnackBar = Snackbar.make(m_MainLayout, "Please enter valid mobile number", Snackbar.LENGTH_SHORT); 
          m_SnackBar.show(); 
         } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Pin Can Not Be Empty")) { 
          m_SnackBar = Snackbar.make(m_MainLayout, "Please enter Password", Snackbar.LENGTH_SHORT); 
          m_SnackBar.show(); 
         } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Invalid PIN")) { 
          m_SnackBar = Snackbar.make(m_MainLayout, "Invalid Password", Snackbar.LENGTH_SHORT); 
          m_SnackBar.show(); 
         } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Subscriber/Agent Blocked due to Wrong Attempts")) { 
          m_SnackBar = Snackbar.make(m_MainLayout, "You are bloacked", Snackbar.LENGTH_SHORT); 
          m_SnackBar.show(); 
         } 

         Looper.loop(); 
        } catch (JSONException e) { 
         e.printStackTrace(); 
        } 
       } 
      }.start(); 

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

    public void getLoginDetails() { 
     s_szMobileNumber = m_InputMobile.getText().toString(); 
     s_szPassword = m_InputPassword.getText().toString(); 
    } 
} 

}

Answer 1

In SplashActivity oder startActivity Sie haben für Homepage

 String PREFS_NAME = "Start_Page"; 
     SharedPreferences prefs = getSharedPreferences(PREFS_NAME, 
            MODE_PRIVATE); 
     strFirstTime = prefs.getString("Authentication", "NO Authentication"); 

     if (strFirstTime.equals("NO Authentication")) 
      { 
       Show Login page 
     } 
     else 
     { 
     // Intent for open HomePage 
     } 

     in Login page, after loging successfully done write below code 

     SharedPreferences.Editor editor = getSharedPreferences(PREFS_NAME, MODE_PRIVATE).edit(); 
          editor.putString("Authentication",et_email_add.getText().toString()); 
          editor.commit(); 

Anruf Absicht zu überprüfen

Answer 2

Sobald nach erfolgreicher Anmeldung den Benutzernamen und das Passwort in gemeinsamen Vorlieben und in splash speichern scannen Sie oder führen Sie eine Asynctask aus, um den Anmeldedienst beim Start der App zu überprüfen.

Answer 3

Um dies zu erreichen, müssen Sie die Einstellungen beibehalten und jedes Mal überprüfen, wann Ihre App startet.

Es gibt viele Tutorials und Antwort für How to use Shared preferences example, Android Shared preferences example