Java tutorial
/* BlitzMail * Copyright (C) 2013 Torsten Grote * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package de.grobox.blitzmail; import java.util.Iterator; import org.json.JSONObject; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.content.SharedPreferences.OnSharedPreferenceChangeListener; import android.net.Uri; import android.os.Bundle; import android.preference.CheckBoxPreference; import android.preference.Preference; import android.preference.Preference.OnPreferenceClickListener; import android.preference.PreferenceActivity; import android.preference.PreferenceCategory; @SuppressWarnings("deprecation") public class MainActivity extends PreferenceActivity implements OnSharedPreferenceChangeListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.preferences); addSendNowPref(this); setPrefState(); } @Override public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) { if (key.equals("pref_smtp_auth")) { setPrefState(); } } private void setPrefState() { CheckBoxPreference authPref = (CheckBoxPreference) findPreference("pref_smtp_auth"); if (authPref.isChecked()) { findPreference("pref_smtp_encryption").setEnabled(true); findPreference("pref_smtp_user").setEnabled(true); findPreference("pref_smtp_pass").setEnabled(true); } else { findPreference("pref_smtp_encryption").setEnabled(false); findPreference("pref_smtp_user").setEnabled(false); findPreference("pref_smtp_pass").setEnabled(false); } } @Override protected void onResume() { super.onResume(); getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this); // recreate send now preference PreferenceCategory cat = (PreferenceCategory) findPreference("pref_sending"); if (cat.findPreference("pref_send_now") != null) { cat.removePreference(findPreference("pref_send_now")); } addSendNowPref(this); } @Override protected void onPause() { super.onPause(); getPreferenceScreen().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this); } private void addSendNowPref(final Context c) { JSONObject mails = MailStorage.getMails(this); if (mails != null && mails.length() > 0) { PreferenceCategory targetCategory = (PreferenceCategory) findPreference("pref_sending"); Preference pref = new Preference(this); pref.setKey("pref_send_now"); pref.setTitle(R.string.pref_send_now); pref.setSummary( String.format(getResources().getString(R.string.pref_send_now_summary), mails.length())); pref.setOnPreferenceClickListener(new OnPreferenceClickListener() { public boolean onPreferenceClick(Preference preference) { if (BuildConfig.PRO) sendNow(); else { AlertDialog.Builder builder = new AlertDialog.Builder(c); builder.setTitle(c.getString(R.string.app_name)); builder.setMessage(c.getString(R.string.error_lite_version)); builder.setIcon(android.R.drawable.ic_dialog_info); // Add the buttons builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { Uri uri = Uri.parse( "https://play.google.com/store/apps/details?id=de.grobox.blitzmail.pro"); Intent intent = new Intent(Intent.ACTION_VIEW, uri); if (intent.resolveActivity(c.getPackageManager()) != null) { c.startActivity(intent); } dialog.dismiss(); } }); builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { dialog.dismiss(); } }); // Create and show the AlertDialog AlertDialog dialog = builder.create(); dialog.setCanceledOnTouchOutside(false); dialog.show(); } return true; } }); targetCategory.addPreference(pref); } } private void sendNow() { JSONObject mails = MailStorage.getMails(this); Iterator<?> i = mails.keys(); while (i.hasNext()) { String mail = mails.opt((String) i.next()).toString(); Intent intent = new Intent(this, SendActivity.class); intent.setAction("BlitzMailReSend"); intent.putExtra("mail", mail); startActivity(intent); } ((PreferenceCategory) findPreference("pref_sending")).removePreference(findPreference("pref_send_now")); } }