Android Open Source - final_app Preferences Fragment

From Project

Back to project page final_app.

License

The source code is released under:

CC0 1.0 Universal Statement of Purpose The laws of most jurisdictions throughout the world automatically confer exclusive Copyright and Related Rights (defined below) upon the creator and subsequent...

If you think the Android project final_app listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

/*
 * Copyright (C) 2013 ZXing authors//from  ww  w  .  j  a va 2 s .  c om
 *
 * 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.google.zxing.client.android;

import java.util.ArrayList;
import java.util.Collection;

import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceScreen;

public final class PreferencesFragment extends PreferenceFragment implements SharedPreferences.OnSharedPreferenceChangeListener {

  private CheckBoxPreference decode1D;
  private CheckBoxPreference decodeQR;
  private CheckBoxPreference decodeDataMatrix;

  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    addPreferencesFromResource(R.xml.preferences);

    PreferenceScreen preferences = getPreferenceScreen();
    preferences.getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
    decode1D = (CheckBoxPreference) preferences.findPreference(PreferencesActivity.KEY_DECODE_1D);
    decodeQR = (CheckBoxPreference) preferences.findPreference(PreferencesActivity.KEY_DECODE_QR);
    decodeDataMatrix = (CheckBoxPreference) preferences.findPreference(PreferencesActivity.KEY_DECODE_DATA_MATRIX);
    disableLastCheckedPref();
  }

  @Override
  public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
    disableLastCheckedPref();
  }

  private void disableLastCheckedPref() {
    Collection<CheckBoxPreference> checked = new ArrayList<CheckBoxPreference>(3);
    if (decode1D.isChecked()) {
      checked.add(decode1D);
    }
    if (decodeQR.isChecked()) {
      checked.add(decodeQR);
    }
    if (decodeDataMatrix.isChecked()) {
      checked.add(decodeDataMatrix);
    }
    boolean disable = checked.size() < 2;
    CheckBoxPreference[] checkBoxPreferences = { decode1D, decodeQR, decodeDataMatrix };
    for (CheckBoxPreference pref : checkBoxPreferences) {
      pref.setEnabled(!(disable && checked.contains(pref)));
    }
  }
}

Java Source Code List