sharedpreferences不會記得在安卓

Question

值這裏是我把值碼：

if(soundima == 1){ 
         soundima=0; 
         editor.putInt("sOn", soundima); 
         editor.commit(); 
        } 
        else if(soundima == 0){ 
         soundima=1; 
         editor.putInt("sOn", soundima); 
         editor.commit(); 
        } 

於是，當我退出程序，值不記得。我得到這個代碼的值：

editor = PreferenceManager.getDefaultSharedPreferences(this); 
    soundima = editor.getInt("sOn", 0); 

Answer 1

我不完全確定爲什麼這是行不通的。但是，下面的代碼應該可以解決問題。

//create a constant to use for the shared preferences 
public static final String YOUR_CONSTANT = "Preferences"; 

然後放置值共享偏好，使用如下代碼：

if(soundima == 1){ 
    soundima = 0; 
    SharedPreferences sound = getSharedPreferences(YOUR_CONSTANT,0); 
    SharedPreferences.Editor editor = sound.edit(); 
    editor.putInt("sOn", soundima); 
    editor.commit(); 
} 
else if(soundima == 0){ 
    soundima = 1; 
    SharedPreferences sound = getSharedPreferences(YOUR_CONSTANT,0); 
    SharedPreferences.Editor editor = sound.edit(); 
    editor.putInt("sOn", soundima); 
    editor.commit(); 
} 

然後檢索值，使用此代碼：

SharedPreferences sound = getSharedPreferences(YOUR_CONSTANT,0); 
soundima = sound.getInt("sOn", 0);