Android Open Source - SMSMorsify-Android Settings Preference Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.savanto.android.smsmorsify;
//from   w  ww  .  ja  v a  2s. com
import java.util.List;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.content.res.Configuration;
import android.os.Build;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceCategory;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;

/**
 * A {@link PreferenceActivity} that presents a set of application settings. On
 * handset devices, settings are presented as a single list. On tablets,
 * settings are split by category, with category headers shown to the left of
 * the list of settings.
 * <p>
 * See <a href="http://developer.android.com/design/patterns/settings.html">
 * Android Design: Settings</a> for design guidelines and the <a
 * href="http://developer.android.com/guide/topics/ui/settings.html">Settings
 * API Guide</a> for more information on developing a Settings UI.
 */
public class SettingsPreferenceActivity extends PreferenceActivity implements OnSharedPreferenceChangeListener
{
  private SeekBarPreference mDelayPreference;
  private SeekBarPreference mDitPreference;
  private SeekBarPreference mShortGapPreference;
  private SeekBarPreference mMediumGapPreference;

  private SharedPreferences mSharedPreferences;

  /**
   * Determines whether to always show the simplified settings UI, where
   * settings are presented in a single list. When false, settings are shown
   * as a master/detail two-pane view on tablets. When true, a single pane is
   * shown on tablets.
   */
  private static final boolean  ALWAYS_SIMPLE_PREFS  = false;

  @SuppressWarnings("deprecation")
  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);

    // Shows the simplified settings UI if the device configuration if the device
    // configuration dictates that a simplified, single-pane UI should be shown.
    if (SettingsPreferenceActivity.isSimplePreferences(this))
    {
      // In the simplified UI, fragments are not used at all and we instead
      // use the older PreferenceActivity APIs.
  
      // Add 'enable' preferences from xml.
      this.addPreferencesFromResource(R.xml.pref_enable);
      PreferenceManager.setDefaultValues(this, R.xml.pref_enable, false);  
  
      // Add 'general' preferences, and a corresponding header from xml.
      PreferenceCategory fakeHeader = new PreferenceCategory(this);
      fakeHeader.setTitle(R.string.pref_header_general);
      this.getPreferenceScreen().addPreference(fakeHeader);
      this.addPreferencesFromResource(R.xml.pref_general);
      PreferenceManager.setDefaultValues(this, R.xml.pref_general, false);  
  
      // Add 'Morse code' preferences, and a corresponding header, from xml.
      fakeHeader = new PreferenceCategory(this);
      fakeHeader.setTitle(R.string.pref_header_morse);
      this.getPreferenceScreen().addPreference(fakeHeader);
      this.addPreferencesFromResource(R.xml.pref_morse);
      PreferenceManager.setDefaultValues(this, R.xml.pref_morse, false);

      // Get references to the preferences.
      this.mDelayPreference = (SeekBarPreference) this.getPreferenceScreen().findPreference(this.getText(R.string.pref_key_delay));
      this.mDitPreference = (SeekBarPreference) this.getPreferenceScreen().findPreference(this.getText(R.string.pref_key_dit));
      this.mShortGapPreference = (SeekBarPreference) this.getPreferenceScreen().findPreference(this.getText(R.string.pref_key_short_gap));
      this.mMediumGapPreference = (SeekBarPreference) this.getPreferenceScreen().findPreference(this.getText(R.string.pref_key_medium_gap));

      // Get the shared preferences
      this.mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this.getBaseContext());
    }
  }

  @Override
  protected void onResume()
  {
    super.onResume();

    // Setup initial dynamic summary values of EditText/List/Dialog/Ringtone preferences.
    this.mDelayPreference.setSummary(Long.toString(this.mSharedPreferences.getLong(this.mDelayPreference.getKey(),
        this.mDelayPreference.getDefaultValue())) + this.mDelayPreference.getUnits());
    this.mDitPreference.setSummary(Long.toString(this.mSharedPreferences.getLong(this.mDitPreference.getKey(),
        this.mDitPreference.getDefaultValue())) + this.mDitPreference.getUnits());
    this.mShortGapPreference.setSummary(Long.toString(this.mSharedPreferences.getLong(this.mShortGapPreference.getKey(),
        this.mShortGapPreference.getDefaultValue())) + this.mShortGapPreference.getUnits());
    this.mMediumGapPreference.setSummary(Long.toString(this.mSharedPreferences.getLong(this.mMediumGapPreference.getKey(),
        this.mMediumGapPreference.getDefaultValue())) + this.mMediumGapPreference.getUnits());


    // Register the listener to watch for the preferences value changes.
    // When their values change, their summaries are updated
    // to reflect the new value, per the Android Design guidelines.
    this.mSharedPreferences.registerOnSharedPreferenceChangeListener(this);
  }

  @Override
  protected void onPause()
  {
    super.onPause();
    // Unregister shared preferences change listener
    this.mSharedPreferences.unregisterOnSharedPreferenceChangeListener(this);
  }

  /** {@inheritDoc} */
  @Override
  public boolean onIsMultiPane()
  {
    return SettingsPreferenceActivity.isXLargeTablet(this) && !SettingsPreferenceActivity.isSimplePreferences(this);
  }

  /**
   * Helper method to determine if the device has an extra-large screen. For
   * example, 10" tablets are extra-large.
   */
  private static boolean isXLargeTablet(Context context)
  {
    return (context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
  }

  /**
   * Determines whether the simplified settings UI should be shown. This is
   * true if this is forced via {@link #ALWAYS_SIMPLE_PREFS}, or the device
   * doesn't have newer APIs like {@link PreferenceFragment}, or the device
   * doesn't have an extra-large screen. In these cases, a single-pane
   * "simplified" settings UI should be shown.
   */
  private static boolean isSimplePreferences(Context context)
  {
    return SettingsPreferenceActivity.ALWAYS_SIMPLE_PREFS
        || Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB
        || !SettingsPreferenceActivity.isXLargeTablet(context);
  }

  /**
   * A preference value change listener that updates the preference's summary
   * to reflect its new value.
   */
  @SuppressWarnings("deprecation")
  @Override
  public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key)
  {
    Preference preference = this.findPreference(key);

    if (preference instanceof SeekBarPreference)
    {
      SeekBarPreference seekBarPreference = (SeekBarPreference) preference;
      preference.setSummary(Integer.toString(seekBarPreference.getProgress()) + seekBarPreference.getUnits());
    }
  }

  /*********************************************************************************
   * Fragment-based UI construction, for Honeycomb/tablets
   */

  /** {@inheritDoc} */
  @Override
  @TargetApi(Build.VERSION_CODES.HONEYCOMB)
  public void onBuildHeaders(List<Header> target)
  {
    if (!SettingsPreferenceActivity.isSimplePreferences(this))
      this.loadHeadersFromResource(R.xml.pref_headers, target);
  }

  /**
   * This fragment shows enable SMSMorsify preferences only. It is used when the
   * activity is showing a two-pane settings UI.
   */
  @TargetApi(Build.VERSION_CODES.HONEYCOMB)
  public static class EnablePreferenceFragment extends PreferenceFragment
  {
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
      super.onCreate(savedInstanceState);
      this.addPreferencesFromResource(R.xml.pref_enable);

      // Bind the summaries of EditText/List/Dialog/Ringtone preferences
      // to their values. When their values change, their summaries are
      // updated to reflect the new value, per the Android Design
      // guidelines.
//      SettingsPreferenceActivity.bindPreferenceSummaryToValue(this.findPreference("sync_frequency"));
    }
  }

  /**
   * This fragment shows general preferences only. It is used when the
   * activity is showing a two-pane settings UI.
   */
  @TargetApi(Build.VERSION_CODES.HONEYCOMB)
  public static class GeneralPreferenceFragment extends PreferenceFragment
  {
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
      super.onCreate(savedInstanceState);
      this.addPreferencesFromResource(R.xml.pref_general);

      // Bind the summaries of EditText/List/Dialog/Ringtone preferences
      // to their values. When their values change, their summaries are
      // updated to reflect the new value, per the Android Design
      // guidelines.
//      SettingsPreferenceActivity.bindPreferenceSummaryToValue(this.findPreference("example_text"));
//      SettingsPreferenceActivity.bindPreferenceSummaryToValue(this.findPreference("example_list"));
    }
  }

  /**
   * This fragment shows Morse code preferences only. It is used when the
   * activity is showing a two-pane settings UI.
   */
  @TargetApi(Build.VERSION_CODES.HONEYCOMB)
  public static class MorsePreferenceFragment extends PreferenceFragment
  {
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
      super.onCreate(savedInstanceState);
      this.addPreferencesFromResource(R.xml.pref_morse);

      // Bind the summaries of EditText/List/Dialog/Ringtone preferences
      // to their values. When their values change, their summaries are
      // updated to reflect the new value, per the Android Design
      // guidelines.
//      SettingsPreferenceActivity.bindPreferenceSummaryToValue(this.findPreference("notifications_new_message_ringtone"));
    }
  }
}

Java Source Code List

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