SamplePreferenceActivity.java

package hecosire.com.hecosireapp.smartwatch;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;
import android.preference.EditTextPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.Preference.OnPreferenceClickListener;
import android.preference.PreferenceActivity;
import android.preference.PreferenceCategory;
import android.preference.PreferenceManager;
import android.util.Log;

import hecosire.com.hecosireapp.MyApplication;
import hecosire.com.hecosireapp.R;


/**
 * The sample control preference activity handles the preferences for the sample
 * control extension.
 */
public class SamplePreferenceActivity extends PreferenceActivity  implements
        OnSharedPreferenceChangeListener  {

    private static final int DIALOG_READ_ME = 1;



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

        // Load the preferences from an XML resource
        addPreferencesFromResource(R.xml.preference);

        // Handle read me
        Preference preference = findPreference(getText(R.string.preference_key_read_me));
        preference.setOnPreferenceClickListener(new OnPreferenceClickListener() {

            @Override
            public boolean onPreferenceClick(Preference preference) {
                showDialog(DIALOG_READ_ME);
                return true;
            }
        });

        try {
            PreferenceManager.setDefaultValues(SamplePreferenceActivity.this, R.xml.preference,
                    false);
            for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); i++) {
                initSummary(getPreferenceScreen().getPreference(i));
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        ((MyApplication)getApplication()).reportScreenView("Smartwatch preferences");
    }

    @Override
    protected Dialog onCreateDialog(int id) {
        Dialog dialog = null;

        switch (id) {
            case DIALOG_READ_ME:
                dialog = createReadMeDialog();
                break;
            default:
                Log.w(SampleExtensionService.LOG_TAG, "Not a valid dialog id: " + id);
                break;
        }

        return dialog;
    }

    /**
     * Create the Read me dialog
     *
     * @return the Dialog
     */
    private Dialog createReadMeDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage(R.string.preference_option_read_me_txt)
                .setTitle(R.string.preference_option_read_me)
                .setIcon(android.R.drawable.ic_dialog_info)
                .setPositiveButton(android.R.string.ok, new OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                });
        return builder.create();
    }

    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
                                          String key) {
        updatePrefSummary(findPreference(key));
    }

    private void initSummary(Preference p) {
        if (p instanceof PreferenceCategory) {
            PreferenceCategory pCat = (PreferenceCategory) p;
            for (int i = 0; i < pCat.getPreferenceCount(); i++) {
                initSummary(pCat.getPreference(i));
            }
        } else {
            p.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
                @Override
                public boolean onPreferenceChange(Preference preference, Object newVal) {
                    preference.setSummary(newVal.toString());
                    return true;
                }

            });
            updatePrefSummary(p);
        }
    }

    private void updatePrefSummary(Preference p) {
        if (p instanceof ListPreference) {
            ListPreference listPref = (ListPreference) p;
            p.setSummary(listPref.getEntry());
        }
        if (p instanceof EditTextPreference) {
            EditTextPreference editTextPref = (EditTextPreference) p;
            p.setSummary(editTextPref.getText());
        }
    }


}