Android Open Source - psiandroid P S I Preferences Activity

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License

The source code is released under:

GNU General Public License

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Java Source Code

package com.phpsysinfo.activity;
/*  w w  w .ja  v  a2s.c  o m*/
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;

import com.phpsysinfo.R;

public class PSIPreferencesActivity extends PreferenceActivity 
implements Preference.OnPreferenceChangeListener {

  @Override
  public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);

    addPreferencesFromResource(R.xml.prefs);

    bindPreferenceSummaryToValue(findPreference("autorefresh"));
  }

  /**
   * Attaches a listener so the summary is always updated with the preference value.
   * Also fires the listener once, to initialize the summary (so it shows up before the value
   * is changed.)
   */
  private void bindPreferenceSummaryToValue(Preference preference) {
    // Set the listener to watch for value changes.
    preference.setOnPreferenceChangeListener(this);

    // Trigger the listener immediately with the preference's
    // current value.
    onPreferenceChange(preference,
        PreferenceManager
        .getDefaultSharedPreferences(preference.getContext())
        .getString(preference.getKey(), ""));
  }

  @Override
  public boolean onPreferenceChange(Preference preference, Object value) {
    String stringValue = value.toString();

    if (preference instanceof ListPreference) {
      // For list preferences, look up the correct display value in
      // the preference's 'entries' list (since they have separate labels/values).
      ListPreference listPreference = (ListPreference) preference;
      int prefIndex = listPreference.findIndexOfValue(stringValue);
      if (prefIndex >= 0) {
        preference.setSummary(listPreference.getEntries()[prefIndex]);
      }
    } else {
      // For other preferences, set the summary to the value's simple string representation.
      preference.setSummary(stringValue);
    }
    return true;
  }

}

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