使用SharedPreferences保存用戶詳細信息

Question

嗨我想讓我的應用程序記住用戶登錄後的用戶登錄詳細信息，直到用戶按下「註銷」按鈕。我現在用的這種風格

private CheckBox mCheckSavePassword; 
    mCheckSavePassword.setChecked(preferences.getBoolean("prefSavePassword", false)); 
    SharedPreferences.Editor preferencesEditor = preferences.edit(); 
     preferencesEditor.putString("prefUserName", username); 
      if(mCheckSavePassword.isChecked()) { 
        preferencesEditor.putString("prefPassword", password); 
      } 
      preferencesEditor.putBoolean("prefSavePassword", mCheckSavePassword.isChecked()); 
      preferencesEditor.commit(); 

但它不工作

Answer 1

看到下面的用法編寫

SharedPreferences sharedpreferences = getSharedPreferences("pref_file_name", Context.MODE_PRIVATE); 
    Editor editor = sharedpreferences.edit(); 
    editor.putString("prefUserName", username); 
    if (mCheckSavePassword.isChecked()) 
     editor.putString("prefPassword", password); 
    editor.putBoolean("prefSavePassword", mCheckSavePassword.isChecked()); 
    editor.commit(); 

，你必須分離出你讀邏輯（上面只是寫它優先） 在屏幕初始化期間，只讀取首選項並初始化複選框和密碼框的狀態

Answer 2

試試這種方式，希望這會幫助你解決你的問題。

如何設置：

SharedPreferences sharedPreferences = getSharedPreferences(getString(R.string.app_name), MODE_PRIVATE); 
SharedPreferences.Editor editor = sharedPreferences.edit(); 
editor.putBoolean("prefUserName", username); 
editor.putBoolean("prefPassword", mCheckSavePassword.isChecked()?password:""); 
editor.commit(); 

如何獲得：

SharedPreferences sharedPreferences = getSharedPreferences("yourSharePreferenceName", MODE_PRIVATE); 
mCheckSavePassword.setChecked(sharedPreferences.getString("prefPassword","").trim().length()>0?true:false); 

Answer 3

這是你如何保存用戶的詳細信息，當用戶登錄成功。

此外，如果您想在共享首選項中爲用戶下次登錄屏幕時製作用戶名，此代碼將對您有所幫助。

我還包括代碼來填充EditText中的共享prefernces值，如果方向更改。

//Form Variables 
EditText userName; 
CheckBox chkRememberMe; 

//SharedPrefernces Variables to save userName and password of User 
SharedPreferences loginPreferences; 
private static final String SPF_NAME = "vidslogin"; 
private static final String USERNAME = "username"; 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_login); 

    //Getting Values from edit text fields 
    userName = (EditText) findViewById(R.id.login_et_username); 

    //Check box to remember UN and PSW 
    chkRememberMe = (CheckBox) findViewById(R.id.cb_rememberMe); 

    //Read previously saved userName from sharedPreferences and populate in the editText 
    loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE); 
    userName.setText(loginPreferences.getString(USERNAME, "")); 
} 

//Saving Activity State 
@Override 
public void onSaveInstanceState(Bundle savedInstanceState) { 
    super.onSaveInstanceState(savedInstanceState); 
} 

@Override 
public void onConfigurationChanged(Configuration newConfig) { 
    super.onConfigurationChanged(newConfig); 

    // Checks the orientation of the screen 
    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) { 
     //Read previously saved userName & password from sharedPreferences 
     loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE); 
     userName.setText(loginPreferences.getString(USERNAME, "")); 

    } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){ 
     //Read previously saved userName & password from sharedPreferences 
     loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE); 
     userName.setText(loginPreferences.getString(USERNAME, "")); 

    } 
} 

// login function 

public void login(){ 

//Check if he is authenticated 
// if Authenticated and if the user checks "REMEMBER ME"-- Checkbox, save his details 
//Saving userName into SharedPreferences to read for next time 

    String strUserName = userName.getText().toString().trim(); 
    if (chkRememberMe.isChecked()){ 
    loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE); 
    loginPreferences.edit().putString(USERNAME, strUserName).commit(); 
    } 
} 

希望能得到。