Android:如何获取我的应用程序的所有偏好 xml 列表并阅读它们? [英] Android: how to get list of all preference xml's for my app and read them?

问题描述

如何获取应用程序的所有应用程序首选项列表，

1. 我正在以这种方式保存共享首选项

2. 我知道它们在 data/data/app_packagename/shared_prefs

<小时>

3.问题: 但是如何在微调器中获取所有首选项 xml 文件的列表

并阅读每个首选项，我在 SO 中搜索，但我没有找到任何有关此的帮助，如何读取所有首选项 xml 文件我的应用程序目录并访问首选项?

PS:我知道 SharedPreference.getAll();，一旦我拿到文件就足够阅读了吗?>

我用bits(Rough Code)写的，运行时报错，下面是实现方法

void getList(){//将从 onCreate 调用以填充微调器，是的微调器已绑定PackageManager m = getPackageManager();String s = getPackageName();尝试 {PackageInfo p = m.getPackageInfo(s, 0);s = p.applicationInfo.dataDir;} catch (NameNotFoundException e) {Log.w("yourtag", "未找到错误包名", e);}Log.i("dir", s=s+"/shared_prefs");//是这种写法，怎么从这里开始}

解决方案

试试这个

 File prefsdir = new File(getApplicationInfo().dataDir,"shared_prefs");if(prefsdir.exists() && prefsdir.isDirectory()){String[] list = prefsdir.list();ArrayAdapter适配器 = 新的 ArrayAdapter(this, android.R.layout.simple_expandable_list_item_1, android.R.id.text1,list);Spinner sp = (Spinner) findViewById(R.id.spinner1);sp.setAdapter(适配器)；}

//获取选中的item

String item = (String) sp.getSelectedItem();//从文件名中删除.xmlString preffile = item.substring(0, item.length()-4);SharedPreferences sp2 = getSharedPreferences(preffile, MODE_PRIVATE);映射<字符串，?>地图 = sp2.getAll();for (Entry entry : map.entrySet()){System.out.println("key为"+ entry.getKey() + " and value is " + entry.getValue());}

how to get list of all application preferences for application,

1. I am saving shared preference in this manner

2. I know that they are in data/data/app_packagename/shared_prefs

---

3. THE PROBLEM: But how to get list of all preference xml files in a spinner

and read each preference, i searched in SO, but i did not found any help regarding this, how to do read all preference xml files in my application directory and access the preferences?

P.S: I am aware of SharedPreference.getAll();, will be enough to read once i get the file?

I have wrote in bits(Rough Code), it give error when tried to run, here is the implemented method

void getList()
{
  //will be invoked from onCreate to populate spinner,yes spinner is already binded
   PackageManager m = getPackageManager();
        String s = getPackageName();
        try {
            PackageInfo p = m.getPackageInfo(s, 0);
            s = p.applicationInfo.dataDir;
        } catch (NameNotFoundException e) {
            Log.w("yourtag", "Error Package name not found ", e);
        }
        Log.i("dir", s=s+"/shared_prefs");
     //is this write way, how to proceed from here
}

解决方案

Try this

    File prefsdir = new File(getApplicationInfo().dataDir,"shared_prefs");

    if(prefsdir.exists() && prefsdir.isDirectory()){
        String[] list = prefsdir.list();
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, android.R.id.text1,list);
        Spinner sp = (Spinner) findViewById(R.id.spinner1);
        sp.setAdapter(adapter);

    }

//To get the selected item

String item = (String) sp.getSelectedItem();
    //remove .xml from the file name
    String preffile = item.substring(0, item.length()-4);

    SharedPreferences sp2 = getSharedPreferences(preffile, MODE_PRIVATE);
    Map<String, ?> map = sp2.getAll();          

    for (Entry<String, ?> entry : map.entrySet()){
        System.out.println("key is "+ entry.getKey() + " and value is " + entry.getValue());
    }

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