Java tutorial
/* * Copyright 2010-2013 Eric Kok et al. * * Transdroid is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Transdroid is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Transdroid. If not, see <http://www.gnu.org/licenses/>. */ package org.transdroid.core.gui.settings; import android.annotation.TargetApi; import android.app.AlertDialog; import android.app.Dialog; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.content.Intent; import android.content.SharedPreferences; import android.os.Build; import android.os.Bundle; import android.preference.CheckBoxPreference; import android.preference.Preference; import android.preference.Preference.OnPreferenceClickListener; import android.preference.PreferenceActivity; import android.preference.PreferenceManager; import android.text.TextUtils; import org.androidannotations.annotations.Bean; import org.androidannotations.annotations.EActivity; import org.androidannotations.annotations.OnActivityResult; import org.androidannotations.annotations.OptionsItem; import org.json.JSONException; import org.transdroid.R; import org.transdroid.core.app.settings.ApplicationSettings; import org.transdroid.core.app.settings.SettingsPersistence; import org.transdroid.core.gui.log.ErrorLogSender; import org.transdroid.core.gui.navigation.NavigationHelper; import org.transdroid.core.gui.search.BarcodeHelper; import org.transdroid.core.gui.search.SearchHistoryProvider; import org.transdroid.core.service.BootReceiver; import java.io.FileNotFoundException; import java.io.IOException; import de.keyboardsurfer.android.widget.crouton.Crouton; @EActivity public class SystemSettingsActivity extends PreferenceActivity { protected static final int DIALOG_IMPORTSETTINGS = 0; private OnPreferenceClickListener onImportSettingsClick = new OnPreferenceClickListener() { @SuppressWarnings("deprecation") @Override public boolean onPreferenceClick(Preference preference) { showDialog(DIALOG_IMPORTSETTINGS); return true; } }; protected static final int DIALOG_EXPORTSETTINGS = 1; private OnPreferenceClickListener onExportSettingsClick = new OnPreferenceClickListener() { @SuppressWarnings("deprecation") @Override public boolean onPreferenceClick(Preference preference) { showDialog(DIALOG_EXPORTSETTINGS); return true; } }; @Bean protected NavigationHelper navigationHelper; @Bean protected ApplicationSettings applicationSettings; @Bean protected ErrorLogSender errorLogSender; @Bean protected SettingsPersistence settingsPersistence; private OnPreferenceClickListener onCheckUpdatesClick = new OnPreferenceClickListener() { @Override public boolean onPreferenceClick(Preference preference) { if (((CheckBoxPreference) preference).isChecked()) { BootReceiver.startAppUpdatesService(getApplicationContext()); } else { BootReceiver.cancelAppUpdates(getApplicationContext()); } return true; } }; private OnPreferenceClickListener onClearSearchClick = new OnPreferenceClickListener() { @Override public boolean onPreferenceClick(Preference preference) { SearchHistoryProvider.clearHistory(getApplicationContext()); Crouton.showText(SystemSettingsActivity.this, R.string.pref_clearsearch_success, NavigationHelper.CROUTON_INFO_STYLE); return true; } }; private OnClickListener importSettingsFromFile = new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(SystemSettingsActivity.this); try { settingsPersistence.importSettingsFromFile(prefs, SettingsPersistence.DEFAULT_SETTINGS_FILE); Crouton.showText(SystemSettingsActivity.this, R.string.pref_import_success, NavigationHelper.CROUTON_INFO_STYLE); } catch (FileNotFoundException e) { Crouton.showText(SystemSettingsActivity.this, R.string.error_file_not_found, NavigationHelper.CROUTON_ERROR_STYLE); } catch (JSONException e) { Crouton.showText(SystemSettingsActivity.this, getString(R.string.error_no_valid_settings_file, getString(R.string.app_name)), NavigationHelper.CROUTON_ERROR_STYLE); } } }; private OnClickListener importSettingsFromQr = new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { BarcodeHelper.startBarcodeScanner(SystemSettingsActivity.this, BarcodeHelper.ACTIVITY_BARCODE_QRSETTINGS); } }; private OnClickListener exportSettingsToFile = new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(SystemSettingsActivity.this); try { settingsPersistence.exportSettingsToFile(prefs, SettingsPersistence.DEFAULT_SETTINGS_FILE); Crouton.showText(SystemSettingsActivity.this, R.string.pref_export_success, NavigationHelper.CROUTON_INFO_STYLE); } catch (JSONException e) { Crouton.showText(SystemSettingsActivity.this, R.string.error_cant_write_settings_file, NavigationHelper.CROUTON_ERROR_STYLE); } catch (IOException e) { Crouton.showText(SystemSettingsActivity.this, R.string.error_cant_write_settings_file, NavigationHelper.CROUTON_ERROR_STYLE); } } }; private OnClickListener exportSettingsToQr = new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(SystemSettingsActivity.this); try { String settings = settingsPersistence.exportSettingsAsString(prefs); BarcodeHelper.shareContentBarcode(SystemSettingsActivity.this, settings); } catch (JSONException e) { Crouton.showText(SystemSettingsActivity.this, R.string.error_cant_write_settings_file, NavigationHelper.CROUTON_ERROR_STYLE); } } }; @SuppressWarnings("deprecation") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getActionBar().setDisplayHomeAsUpEnabled(true); // Just load the system-related preferences from XML addPreferencesFromResource(R.xml.pref_system); // Handle outgoing links and preference changes if (navigationHelper.enableUpdateChecker()) { findPreference("system_checkupdates").setOnPreferenceClickListener(onCheckUpdatesClick); } else { getPreferenceScreen().removePreference(findPreference("system_checkupdates")); } findPreference("system_clearsearch").setOnPreferenceClickListener(onClearSearchClick); findPreference("system_importsettings").setOnPreferenceClickListener(onImportSettingsClick); findPreference("system_exportsettings").setOnPreferenceClickListener(onExportSettingsClick); } @TargetApi(Build.VERSION_CODES.HONEYCOMB) @OptionsItem(android.R.id.home) protected void navigateUp() { MainSettingsActivity_.intent(this).flags(Intent.FLAG_ACTIVITY_CLEAR_TOP).start(); } @OnActivityResult(BarcodeHelper.ACTIVITY_BARCODE_QRSETTINGS) public void onQrCodeScanned(int resultCode, Intent data) { // We should have received Intent extras with the QR-decoded data representing Transdroid settings SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(SystemSettingsActivity.this); String contents = data.getStringExtra("SCAN_RESULT"); String formatName = data.getStringExtra("SCAN_RESULT_FORMAT"); if (formatName != null && formatName.equals("QR_CODE") && !TextUtils.isEmpty(contents)) { try { settingsPersistence.importSettingsAsString(prefs, contents); Crouton.showText(SystemSettingsActivity.this, R.string.pref_import_success, NavigationHelper.CROUTON_INFO_STYLE); } catch (JSONException e) { Crouton.showText(SystemSettingsActivity.this, R.string.error_file_not_found, NavigationHelper.CROUTON_ERROR_STYLE); } } } @SuppressWarnings("deprecation") protected Dialog onCreateDialog(int id) { switch (id) { case DIALOG_IMPORTSETTINGS: // @formatter:off return new AlertDialog.Builder(this) .setMessage(getString(R.string.pref_import_dialog, getString(R.string.app_name), SettingsPersistence.DEFAULT_SETTINGS_FILE.toString())) .setPositiveButton(R.string.pref_import_fromfile, importSettingsFromFile) .setNeutralButton(R.string.pref_import_fromqr, importSettingsFromQr) .setNegativeButton(android.R.string.cancel, null).create(); // @formatter:on case DIALOG_EXPORTSETTINGS: // @formatter:off return new AlertDialog.Builder(this) .setMessage(getString(R.string.pref_export_dialog, getString(R.string.app_name), SettingsPersistence.DEFAULT_SETTINGS_FILE.toString())) .setPositiveButton(R.string.pref_export_tofile, exportSettingsToFile) .setNeutralButton(R.string.pref_export_toqr, exportSettingsToQr) .setNegativeButton(android.R.string.cancel, null).create(); // @formatter:on } return null; } }