Java tutorial
package com.juegoteca.actividades; import android.annotation.SuppressLint; import android.annotation.TargetApi; import android.app.AlertDialog; import android.app.ProgressDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.PackageManager.NameNotFoundException; import android.content.res.Configuration; import android.content.res.Resources; import android.net.Uri; import android.os.AsyncTask; import android.os.Build; import android.os.Bundle; import android.preference.CheckBoxPreference; import android.preference.ListPreference; import android.preference.Preference; import android.preference.PreferenceActivity; import android.preference.PreferenceCategory; import android.preference.PreferenceFragment; import android.preference.PreferenceManager; import android.preference.SwitchPreference; import android.support.v4.content.FileProvider; import android.view.Menu; import android.view.MenuItem; import android.widget.Toast; import com.juegoteca.util.Utilidades; import com.mijuegoteca.BuildConfig; import com.mijuegoteca.R; import java.io.File; import java.util.List; import static java.security.AccessController.getContext; /** * 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 Opciones extends PreferenceActivity { protected static final int PICKFILE_RESULT_CODE = 0; /** * 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; private static final int FILE_SELECT_CODE = 0; private static Utilidades utilidades; /** * A preference value change listener that updates the preference's summary * to reflect its new value. */ private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() { @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. ListPreference listPreference = (ListPreference) preference; int index = listPreference.findIndexOfValue(stringValue); // Set the summary to reflect the new value. preference.setSummary(index >= 0 ? listPreference.getEntries()[index] : null); } else { // For all other preferences, set the summary to the value's // simple string representation. preference.setSummary(stringValue); } return true; } }; private ProgressDialog dialogoCopia; private ProgressDialog dialogoEmpaquetado; /** * Helper method to determine if the device has an extra-large screen. For * example, 10" tablets are extra-large. */ @SuppressLint("InlinedApi") 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 ALWAYS_SIMPLE_PREFS || Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB || !isXLargeTablet(context); } /** * Binds a preference's summary to its value. More specifically, when the * preference's value is changed, its summary (line of text below the * preference title) is updated to reflect the value. The summary is also * immediately updated upon calling this method. The exact display format is * dependent on the type of preference. * * @see #sBindPreferenceSummaryToValueListener */ private static void bindPreferenceSummaryToValue(Preference preference) { // Set the listener to watch for value changes. preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener); // Trigger the listener immediately with the preference's // current value. sBindPreferenceSummaryToValueListener.onPreferenceChange(preference, PreferenceManager .getDefaultSharedPreferences(preference.getContext()).getString(preference.getKey(), "")); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); utilidades = new Utilidades(this); setupSimplePreferencesScreen(); } /** * Shows the simplified settings UI if the device configuration if the * device configuration dictates that a simplified, single-pane UI should be * shown. */ @SuppressWarnings("deprecation") private void setupSimplePreferencesScreen() { if (!isSimplePreferences(this)) { return; } final SharedPreferences settings = getSharedPreferences("UserInfo", 0); // In the simplified UI, fragments are not used at all and we instead // use the older PreferenceActivity APIs. addPreferencesFromResource(R.xml.pref_container); // Add 'general' preferences. PreferenceCategory fakeHeader = new PreferenceCategory(this); fakeHeader.setTitle(R.string.pref_header_general); getPreferenceScreen().addPreference(fakeHeader); addPreferencesFromResource(R.xml.pref_general); CheckBoxPreference preferenciaOrden = (CheckBoxPreference) findPreference("orden_ultimos_anadidos"); preferenciaOrden.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() { public boolean onPreferenceChange(Preference preference, Object newValue) { if (newValue.toString().equals("true")) { SharedPreferences.Editor editor = settings.edit(); editor.putBoolean("orden_ultimos_fecha_compra", true); editor.commit(); } else { SharedPreferences.Editor editor = settings.edit(); editor.putBoolean("orden_ultimos_fecha_compra", false); editor.commit(); } return true; } }); ListPreference preferenciaModeda = (ListPreference) findPreference("currencys"); preferenciaModeda.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() { public boolean onPreferenceChange(Preference preference, Object newValue) { SharedPreferences.Editor editor = settings.edit(); editor.putString("currency", newValue.toString()); editor.commit(); return true; } }); CheckBoxPreference preferenciaDetalle = (CheckBoxPreference) findPreference("detalle_imagen"); preferenciaDetalle.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() { public boolean onPreferenceChange(Preference preference, Object newValue) { if (newValue.toString().equals("true")) { SharedPreferences.Editor editor = settings.edit(); editor.putBoolean("detalle_imagen", true); editor.commit(); } else { SharedPreferences.Editor editor = settings.edit(); editor.putBoolean("detalle_imagen", false); editor.commit(); } return true; } }); SwitchPreference preferenciaTwitter = (SwitchPreference) findPreference("twitter"); preferenciaTwitter.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() { @Override public boolean onPreferenceChange(Preference preference, Object newValue) { if (newValue instanceof Boolean) { boolean isChecked = (boolean) newValue; if (isChecked) { Intent intent = new Intent(getApplicationContext(), TwitterActivity.class); startActivity(intent); return true; } } return true; } }); // Add 'data and sync' preferences, and a corresponding header. PreferenceCategory fakeHeader2 = new PreferenceCategory(this); fakeHeader2.setTitle(R.string.pref_header_data); getPreferenceScreen().addPreference(fakeHeader2); addPreferencesFromResource(R.xml.pref_datos_seguridad); // Establece las acciones al hacer click en las preferencias Preference preferenciaCopiaExportar = findPreference("exportar_copia_seguridad"); preferenciaCopiaExportar.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() { public boolean onPreferenceClick(Preference preference) { Toast t; if (!utilidades.baseDatosEsVacia()) { new CopiaSeguridadFichero().execute(); } else { t = Toast.makeText(getApplicationContext(), getString(R.string.no_data_backup), Toast.LENGTH_SHORT); t.show(); } return true; } }); Preference preferenciaCopiaImportar = findPreference("importar_restaurar_seguridad"); preferenciaCopiaImportar.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() { public boolean onPreferenceClick(Preference preference) { AlertDialog.Builder builder = new AlertDialog.Builder(Opciones.this); builder.setMessage(R.string.alerta_restaurar_texto).setTitle(R.string.alerta_restaurar_titulo); builder.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { Intent intent = new Intent(Intent.ACTION_GET_CONTENT); intent.setType("application/zip"); intent.addCategory(Intent.CATEGORY_OPENABLE); startActivityForResult(Intent.createChooser(intent, "Escoja el fichero de copia..."), FILE_SELECT_CODE); } }); builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { // User cancelled the dialog return; } }); AlertDialog dialog = builder.create(); dialog.show(); return true; } }); Preference preferenciaBorrar = findPreference("borrar_todo"); preferenciaBorrar.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() { public boolean onPreferenceClick(Preference preference) { utilidades.borrarTodosDatos(true); return true; } }); // Add 'otros' preferences. PreferenceCategory fakeHeader3 = new PreferenceCategory(this); fakeHeader3.setTitle(R.string.pref_header_otros); getPreferenceScreen().addPreference(fakeHeader3); addPreferencesFromResource(R.xml.pref_otros); Resources res = getResources(); // String versionName = res.getString(R.string.app_version); String versionName = ""; try { versionName = getPackageManager().getPackageInfo(getPackageName(), 0).versionName; } catch (NameNotFoundException e) { // versionName = res.getString(R.string.app_version); } String version = res.getString(R.string.pref_title_version, versionName); Preference preferenciaInicioSesion = findPreference("about"); preferenciaInicioSesion.setTitle(version); Preference preferenciaLicencia = findPreference("licenses"); preferenciaLicencia.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() { public boolean onPreferenceClick(Preference preference) { Intent intent = new Intent(getApplicationContext(), AcercaDe.class); startActivity(intent); return true; } }); } /** * {@inheritDoc} */ @Override public boolean onIsMultiPane() { return isXLargeTablet(this) && !isSimplePreferences(this); } /** * {@inheritDoc} */ @Override @TargetApi(Build.VERSION_CODES.HONEYCOMB) public void onBuildHeaders(List<Header> target) { if (!isSimplePreferences(this)) { loadHeadersFromResource(R.xml.pref_headers, target); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.buscador, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { Intent intent; switch (item.getItemId()) { case R.id.action_home: intent = new Intent(this, Inicio.class); startActivity(intent); return true; default: return super.onOptionsItemSelected(item); } } /** * */ @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case FILE_SELECT_CODE: if (resultCode == RESULT_OK) { RestaurarCopiaFichero task = new RestaurarCopiaFichero(); task.data = data; task.execute(); } break; } super.onActivityResult(requestCode, resultCode, data); } /** * 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); 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. bindPreferenceSummaryToValue(findPreference("example_text")); bindPreferenceSummaryToValue(findPreference("example_list")); } } /** * This fragment shows data and sync preferences only. It is used when the * activity is showing a two-pane settings UI. */ @TargetApi(Build.VERSION_CODES.HONEYCOMB) public static class DataSyncPreferenceFragment extends PreferenceFragment { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.pref_datos_seguridad); } } /** * @author alvaro */ private class CopiaSeguridadFichero extends AsyncTask<Void, Void, String> { @Override protected void onPreExecute() { dialogoEmpaquetado = ProgressDialog.show(Opciones.this, null, getString(R.string.zip), true); } @Override protected void onPostExecute(String result) { dialogoEmpaquetado.dismiss(); Intent shareIntent = new Intent(); shareIntent.setAction(Intent.ACTION_SEND); shareIntent.putExtra(Intent.EXTRA_STREAM, FileProvider.getUriForFile(Opciones.this, BuildConfig.APPLICATION_ID + ".provider", new File(result))); shareIntent.setType("application/zip"); startActivity(Intent.createChooser(shareIntent, "Enviar a...")); return; } @Override protected String doInBackground(Void... arg0) { return utilidades.hacerCopiaSeguridadFichero(); } } /** * @author alvaro */ private class RestaurarCopiaFichero extends AsyncTask<Void, Void, Integer> { Intent data; @Override protected void onPreExecute() { dialogoCopia = ProgressDialog.show(Opciones.this, null, getString(R.string.unzip), true); } @Override protected Integer doInBackground(Void... params) { // Get the Uri of the selected file Uri uri = data.getData(); // Get the path String path = uri.getPath(); if (utilidades.restaurarCopiaSeguridadFichero(uri)) { return 1; } else { return 2; } } @Override protected void onPostExecute(Integer result) { dialogoCopia.dismiss(); Toast t; switch (result) { case 1: utilidades.reiniciarApp(getString(R.string.copia_restaurada_ok)); break; case 2: t = Toast.makeText(getApplicationContext(), "Error.", Toast.LENGTH_SHORT); t.show(); break; } return; } } }