java/com/android/contacts/common/preference/SortOrderPreference.java

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.contacts.common.preference;

import android.app.AlertDialog.Builder;
import android.content.Context;
import android.preference.ListPreference;
import android.util.AttributeSet;
import com.android.contacts.common.R;

/** Custom preference: sort-by. */
public final class SortOrderPreference extends ListPreference {

  private ContactsPreferences mPreferences;
  private Context mContext;

  public SortOrderPreference(Context context) {
    super(context);
    prepare();
  }

  public SortOrderPreference(Context context, AttributeSet attrs) {
    super(context, attrs);
    prepare();
  }

  private void prepare() {
    mContext = getContext();
    mPreferences = new ContactsPreferences(mContext);
    setEntries(
        new String[] {
          mContext.getString(R.string.display_options_sort_by_given_name),
          mContext.getString(R.string.display_options_sort_by_family_name),
        });
    setEntryValues(
        new String[] {
          String.valueOf(ContactsPreferences.SORT_ORDER_PRIMARY),
          String.valueOf(ContactsPreferences.SORT_ORDER_ALTERNATIVE),
        });
    setValue(String.valueOf(mPreferences.getSortOrder()));
  }

  @Override
  protected boolean shouldPersist() {
    return false; // This preference takes care of its own storage
  }

  @Override
  public CharSequence getSummary() {
    switch (mPreferences.getSortOrder()) {
      case ContactsPreferences.SORT_ORDER_PRIMARY:
        return mContext.getString(R.string.display_options_sort_by_given_name);
      case ContactsPreferences.SORT_ORDER_ALTERNATIVE:
        return mContext.getString(R.string.display_options_sort_by_family_name);
    }
    return null;
  }

  @Override
  protected boolean persistString(String value) {
    int newValue = Integer.parseInt(value);
    if (newValue != mPreferences.getSortOrder()) {
      mPreferences.setSortOrder(newValue);
      notifyChanged();
    }
    return true;
  }

  @Override
  // UX recommendation is not to show cancel button on such lists.
  protected void onPrepareDialogBuilder(Builder builder) {
    super.onPrepareDialogBuilder(builder);
    builder.setNegativeButton(null, null);
  }
}