Get all SharedPreferences names and all their keys?

Question

I'm making backup program, that saved the phone SharedPreferences data into a file of my own structure. But I don't know how to list them all, which I need:

For example, 2 program saved their SharedPreferences with names "Program A" and "Program B". I need to obtains thay String array contain these 2 names. Then, I use getSharedPreferences with "Program A", I need to get all keys that program has saved.

Is it really possible?

EDIT1: I DON'T know what programs/activities on the phone. I want to get ALL the keys that every programs saved. It just like you back up all your phone data, but only SharedPreferences values.

For example: Your phone has 10 programs, each creates a SharedPreferences named Program 1 to Program 10 (but of course, whatever name they want). And I would like to obtain all these Program 1 to Program 10 String. Then, if Program 1 has 5 keys called Key 1 to Key 5, I want to obtain these keys name.

EDIT2: According to NikolaMKD guide, this is what I've done so far, but the list return all programs, with "No Preferences" at all line, even at the first, I saved the SharedPreferences with my activity:

public class Test extends ListActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        SharedPreferences preferences = getSharedPreferences("Test", 1);
        // No matter what name is: Test or the package name
        Editor editor = preferences.edit();
        editor.putInt("TestKey", 0);
        editor.commit();

        List Temp = 
            getPackageManager().queryIntentActivities(
                    new Intent(Intent.ACTION_MAIN, null)
                    .addCategory(Intent.CATEGORY_LAUNCHER), 0);
        String[] App = new String[Temp.size()];
        for (int i = 0; i < Temp.size(); i++) {
            App[i] = Temp.get(i).activityInfo.name;
            FileReader reader = null;
            try {
                reader = new FileReader("/data/data/"
                        + App[i] + "/shared_prefs/" + App[i] + "_preferences.xml");
            } catch (FileNotFoundException e) {
                reader = null;
            }
            if (reader != null)
                App[i] += " (Have Prefereces)";
            else
                App[i] += " (No Prefereces)";
        }
        setListAdapter(new ArrayAdapter(this, R.layout.main, App));
    }



}

user_5380942 · Answer

You can loop through all the xml files in your shared preference directory and get the name of all the files which are the shared preference names in your app.

File src = new File("/data/data/" + BuildConfig.APPLICATION_ID + "/shared_prefs");
if (src.isDirectory()) {
    String files[] = src.list();
    for (int i = 0; i < files.length; i++) {
        if (files[i].contains(".xml")) {
            reloadSharedPreference(context, files[i].replace(".xml", ""));
        }
    }
}

Get all SharedPreferences names and all their keys?

6 Answers