ProferencesProgActivity.java

package com.google.mcommerce.sample.android.chapter07.preferences;

// This file is MainActivity.java
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.TextView;

import com.google.mcommerce.sample.android.R;

public class ProferencesProgActivity extends Activity {
	private Resources resources;
	private SharedPreferences prefs;
	private TextView tv = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.c07_preferences_layout);

		resources = this.getResources();

		prefs = PreferenceManager.getDefaultSharedPreferences(this);
		PreferenceManager.setDefaultValues(this, R.xml.flightoptions01, false);

		tv = (TextView) findViewById(R.id.text1);

		setOptionText();
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		MenuInflater inflater = getMenuInflater();
		inflater.inflate(R.menu.mainmenu, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		if (item.getItemId() == R.id.menu_prefs) {
			Intent intent = new Intent().setClass(this,
					FlightPreferenceActivity01.class);
			this.startActivityForResult(intent, 0);
		}
		return true;
	}

	@Override
	public void onActivityResult(int reqCode, int resCode, Intent data) {
		super.onActivityResult(reqCode, resCode, data);
		setOptionText();
	}

	private void setOptionText() {
		String option = prefs.getString(
				resources.getString(R.string.selected_flight_sort_option),
				resources.getString(R.string.flight_sort_option_default_value));

		tv.setText("option value is "
				+ option
				+ " ("
				+ FlightPreferenceActivity01.optionText[Integer
						.parseInt(option)] + ")");
	}
}