獲取用戶的ID到開放類

Question

我有一個類根據用戶的電子郵件地址和密碼登錄到MySQL數據庫;

public class LoginActivity extends Activity { 
Button btnLogin; 
Button btnLinkToRegister; 
EditText inputEmail; 
EditText inputPassword; 
TextView loginErrorMsg; 

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

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

    // Importing all assets like buttons, text fields 
    inputEmail = (EditText) findViewById(R.id.loginEmail); 
    inputPassword = (EditText) findViewById(R.id.loginPassword); 
    btnLogin = (Button) findViewById(R.id.btnLogin); 
    btnLinkToRegister = (Button) findViewById(R.id.btnLinkToRegisterScreen); 
    loginErrorMsg = (TextView) findViewById(R.id.login_error); 
    inputEmail.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS); 
    // Login button Click Event 
    btnLogin.setOnClickListener(new View.OnClickListener() { 

     public void onClick(View view) { 
      String email = inputEmail.getText().toString(); 
      String password = inputPassword.getText().toString(); 
      UserFunctions userFunction = new UserFunctions(); 
      Log.d("Button", "Login"); 
      JSONObject json = userFunction.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 
         DatabaseHandler db = new DatabaseHandler(getApplicationContext()); 
         JSONObject json_user = json.getJSONObject("user"); 

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

         // Launch Dashboard Screen 
         Intent dashboard = new Intent(getApplicationContext(), DashboardActivity.class); 

         // Close all views before launching Dashboard 
         dashboard.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
         startActivity(dashboard); 

         // Close Login Screen 
         finish(); 
        }else{ 
         // Error in login 
         loginErrorMsg.setText("Incorrect username/password"); 
        } 
       } 
      } catch (JSONException e) { 
       e.printStackTrace(); 
      } 
     } 
    }); 

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

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

本課程作爲已經註冊的用戶沒有任何問題。信息被設置爲具有註冊的MySQL數據庫。一旦登錄，該應用程序將打開該類的DashboardActivity類，目前只有一個註銷按鈕。

如何獲取登錄用戶的uid並將其顯示在DashboardActivity類的文本視圖中？

Answer 1

從當前活動，使用putExtra發送UID：

// Launch Dashboard Screen 
Intent dashboard = new Intent(getApplicationContext(), DashboardActivity.class); 
dashboard.putExtra("UID", json.getString(KEY_UID)); 
// Close all views before launching Dashboard 
dashboard.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
startActivity(dashboard); 

在儀表盤活動onCreate有：

String uid = getIntent().getStringExtra("UID"); 

然後將其設置使用的setText功能的儀表盤活動的TextView TextView對象。