Question

我已经厌倦了使用sharedpreference来存储会话，并使用Log来测试是否存储了信息。但是，android studio似乎跳过了涉及共享偏好的代码。我做错了吗？

全局

public static final String MyPREFERENCES = "MyPrefs" ;
public static final String EmployeeID = "employeeID";
public static final String EmployeeName = "employeeName";
SharedPreferences sharedpreferences;

的OnCreate

sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
    String user = sharedpreferences.getString("EmployeeName", "");
    if (user.equalsIgnoreCase("")) {
        Log.i("Status", "No session detected");
    } else {
        Intent i = new Intent(getApplicationContext(), MainActivity.class);
        startActivity(i);
    }


protected void onPostExecute(Employee results){
        if (results != null){

            SharedPreferences.Editor editor = sharedpreferences.edit();

            editor.putString(EmployeeID, results.getEmployeeID());
            editor.putString(EmployeeName, results.getFirstName()+" "+results.getLastName());
            editor.apply();
            editor.commit();
            Log.i("aaaaaaaa", "hellloooo"); // It print this libe
            String a = sharedpreferences.getString("EmployeeID", "");
            Log.i("aaaaaaaa", a); // but not this line
            Toast.makeText(LoginActivity.this, " Authenticated", Toast.LENGTH_SHORT).show();
            Intent i = new Intent(getApplicationContext(), MainActivity.class);
            startActivity(i);

        }
        else {
            Toast.makeText(LoginActivity.this, "Invalid ID", Toast.LENGTH_SHORT).show();
        }
    }

Answer 1

尝试使用PreferenceManager.getDefaultSharedPreferences(context)，看看是否能解决您的问题。它基本上是一回事，唯一的区别是你用这种方式写入默认的prefs文件。

Answer 2

String a = sharedpreferences.getString("EmployeeID", "");

这可能只是修复bug但我会尝试使用常量值＆＃34; public static final String EmployeeID =＆＃34; employeeID＆＃34 ;;＆＃34;代替。也许关键变量区分大小写？

忽略sharedPreference代码

2 个答案: