CODEWITHSUNDEEP
android
Yarh
Yarh

Reputation: 4627

How to call ListPreference dialog only?

In preference activity I suply listpreference from xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
  <ListPreference
      android:key="lang"
      android:title="@string/LangTitle"
      android:summary="@string/LangSummary"
      android:defaultValue="en"

      android:entries="@array/entries_lang"
      android:entryValues="@array/entryvalues_lang"
      android:dialogTitle="@string/LangDialogTitle"
      />
</PreferenceScreen>

At first is shown preference screen with setting tittle and description. When I click it dialog with availible options is shown.
Is there a way to show only that dialog? Is there a direct call to it?

Upvotes: 1

Views: 1656

Answers (2)

Yarh
Yarh

Reputation: 4627

For all who may need it: There is no direct call, but it can be rebuilded easly. Following DialogFragment create the exact same dialog as ListPreference

public class LanguagePreferenceDialog extends DialogFragment {
  private CharSequence[] mEntries;
  private CharSequence[] mEntryValues;
  private String mValue;
  private boolean mValueSet;
  SharedPreferences prefs;
  private int mClickedDialogEntryIndex;

  @Override public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
    mEntries = getResources().getStringArray(R.array.entries_lang);
    mEntryValues = getResources().getStringArray(R.array.entryvalues_lang);
    mValue = prefs.getString("lang", "en");
  }

  @Override public Dialog onCreateDialog(Bundle savedInstanceState) {
    AlertDialog.Builder dialog = new AlertDialog.Builder(getActivity());
    dialog.setTitle(getString(R.string.LangDialogTitle));
    dialog.setPositiveButton(null, null);
    mClickedDialogEntryIndex = getValueIndex();
    dialog.setSingleChoiceItems(mEntries, mClickedDialogEntryIndex, selectItemListener);
    return dialog.create();
  }

  private int getValueIndex() {
    return findIndexOfValue(mValue);
  }

  public int findIndexOfValue(String value) {
    if (value != null && mEntryValues != null) {
      for (int i = mEntryValues.length - 1; i >= 0; i--) {
        if (mEntryValues[i].equals(value)) {
          return i;
        }
      }
    }
    return -1;
  }

  DialogInterface.OnClickListener selectItemListener = new DialogInterface.OnClickListener() {

    @Override public void onClick(DialogInterface dialog, int which) {
      if (mClickedDialogEntryIndex != which) {
        mClickedDialogEntryIndex = which;
        mValue = mEntryValues[mClickedDialogEntryIndex].toString();
        prefs.edit().putString("lang", mValue).commit();
      }
      dialog.dismiss();
    }
  };
}

Upvotes: 5

Msp
Msp

Reputation: 2493

We can't directly call ListPreference without inflating preference xml file. Preference should always be inside PreferenceScreen. And we have to inflate the whole xml file inorder to make them available on UI. You will have to show a dialog box with a ListView in it.

Upvotes: 0

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