Android的 - 存储/检索与共享preferences串 [英] Android - Storing/retrieving strings with shared preferences

问题描述

正如标题所说，我要保存和检索某些字符串。但我的code将不通过第一线通无论是在检索或存储。 我想请点击此链接：<一href="http://developer.android.com/guide/topics/data/data-storage.html">http://developer.android.com/guide/topics/data/data-storage.html

 私人无效savepath（字符串pathtilsave，int i）以{
    字符串TAL = NULL;
    //不走过去的线下
    共享preferences.Editor编辑= GET preferences（MODE_PRIVATE）.edit（）;
    TAL =将String.valueOf（我）;
    editor.putString（TAL，pathtilsave）;
    editor.commit（）;
}
 

和我的检索方式：

 公共无效getpaths（）{
    字符串TAL = NULL;
    //不走过去的线下
    共享preferences设置= getShared preferences（preFS_NAME，0）;
    的for（int i = 1; I＆LT; = lydliste.length  -  1;我++）{
        TAL =将String.valueOf（我）;
        字符串restoredText = settings.getString（TAL，NULL）;
        如果（restoredText！= NULL）{
            lydliste [我] = restoredText;
        }
    }
}
 

lydliste是一个静态的字符串数组。 preFS_NAME 是

 公共静态最后弦乐preFS_NAME =我的prefsFile;
 

解决方案

我解决了！ 这时候我打电话从类中的方法没有工作！我不得不从另一个类由于某种原因调用它，写的classname.this作为Context参数。 这里是最后的工作：

 共享preferences设置= ctx.getShared preferences（preFS_NAME，0）;
    设置= ctx.getShared preferences（preFS_NAME，0）;
    共享preferences.Editor编辑器= settings.edit（）;
    editor.putString（TAL，pathtilsave）;
     editor.commit（）;
 

As the title says, I want to save and retrieve certain strings. But my code won't pass through the first line neither in retrieve or store. I tried to follow this link: http://developer.android.com/guide/topics/data/data-storage.html

private void savepath(String pathtilsave, int i) {
    String tal = null;
    // doesn't go past the line below
    SharedPreferences.Editor editor = getPreferences(MODE_PRIVATE).edit();
    tal = String.valueOf(i);
    editor.putString(tal, pathtilsave);
    editor.commit();
}

and my retrieve method:

public void getpaths() {
    String tal = null;
    // doesn't go past the line below
    SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
    for (int i = 1; i <= lydliste.length - 1; i++) {
        tal = String.valueOf(i);
        String restoredText = settings.getString(tal, null);
        if (restoredText != null) {
            lydliste[i] = restoredText;
        }
    }
}

lydliste is a static string array. PREFS_NAME is

public static final String PREFS_NAME = "MyPrefsFile";

解决方案

I solved it! It didn't work when I called the methods from within the class! I had to call it from another class for some reason, and write "classname.this" as Context parameter. Here's the final working:

SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, 0);
    settings = ctx.getSharedPreferences(PREFS_NAME, 0);
    SharedPreferences.Editor editor = settings.edit();
    editor.putString(tal, pathtilsave);
     editor.commit(); 

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