SVIN3/Preferences.java at main · CyberCod/SVIN3 · GitHub

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package com.smiths;

import com.smiths.R;

import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceGroup;

public class Preferences extends PreferenceActivity implements OnSharedPreferenceChangeListener {

	SharedPreferences preferences;
	//ListPreference listpref0;
/** Called when the activity is first created. */

	@Override
	public void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);
	    addPreferencesFromResource(R.xml.preferences);
	    this.initSummaries(this.getPreferenceScreen());

	}


	@Override
    protected void onResume() {
        super.onResume();
     // Set up a listener whenever a key changes
        getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);


        this.initSummaries(this.getPreferenceScreen());

    }


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

        // Unregister the listener whenever a key changes
       getPreferenceScreen().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
    }


	/**
	    * Set the summaries of all preferences
	    */
	  private void initSummaries(PreferenceGroup pg) {
	    for (int i = 0; i < pg.getPreferenceCount(); ++i)
	    {
	    	Preference p = pg.getPreference(i);
	    	if (p instanceof PreferenceGroup)
	    		this.initSummaries((PreferenceGroup) p); // recursion
	    else
	      this.setSummary(p);
	    }
	  }


	/**
	    * Set the summaries of the given preference
	    */
	  private void setSummary(Preference pref) {
	    // react on type or key
	      if (pref instanceof ListPreference) {
	      ListPreference listPref = (ListPreference) pref;
	      pref.setSummary(listPref.getEntry());
	      }
	  }

	  /**
	    * used to change the summary of a preference
	    */
	  @Override
	  public void onSharedPreferenceChanged(SharedPreferences sp, String key) {

	    Preference pref = findPreference(key);
	    this.setSummary(pref);

	  }
}