Java tutorial
/* * Copyright (C) 2014 Dominik Schrmann <dominik@dominikschuermann.de> * * This program 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. * * 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.sufficientlysecure.keychain.ui.dialog; import android.app.Activity; import android.app.Dialog; import android.content.DialogInterface; import android.os.Bundle; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.support.annotation.NonNull; import android.support.v4.app.DialogFragment; import android.text.format.DateFormat; import android.view.LayoutInflater; import android.view.View; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.DatePicker; import android.widget.LinearLayout; import android.widget.TextView; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.ui.util.Notify; import org.sufficientlysecure.keychain.ui.util.Notify.Style; import org.sufficientlysecure.keychain.util.Log; import java.util.Calendar; import java.util.Date; import java.util.TimeZone; public class EditSubkeyExpiryDialogFragment extends DialogFragment { private static final String ARG_MESSENGER = "messenger"; private static final String ARG_CREATION = "creation"; private static final String ARG_EXPIRY = "expiry"; public static final int MESSAGE_NEW_EXPIRY = 1; public static final int MESSAGE_CANCEL = 2; public static final String MESSAGE_DATA_EXPIRY = "expiry"; private Messenger mMessenger; /** * Creates new instance of this dialog fragment */ public static EditSubkeyExpiryDialogFragment newInstance(Messenger messenger, Long creationDate, Long expiryDate) { EditSubkeyExpiryDialogFragment frag = new EditSubkeyExpiryDialogFragment(); Bundle args = new Bundle(); args.putParcelable(ARG_MESSENGER, messenger); args.putSerializable(ARG_CREATION, creationDate); args.putSerializable(ARG_EXPIRY, expiryDate); frag.setArguments(args); return frag; } /** * Creates dialog */ @NonNull @Override public Dialog onCreateDialog(Bundle savedInstanceState) { Activity activity = getActivity(); mMessenger = getArguments().getParcelable(ARG_MESSENGER); long creation = getArguments().getLong(ARG_CREATION); long expiry = getArguments().getLong(ARG_EXPIRY); final Calendar creationCal = Calendar.getInstance(TimeZone.getTimeZone("UTC")); creationCal.setTimeInMillis(creation * 1000); Calendar expiryCal = Calendar.getInstance(TimeZone.getTimeZone("UTC")); expiryCal.setTimeInMillis(expiry * 1000); // date picker works with default time zone, we need to convert from UTC to default timezone creationCal.setTimeZone(TimeZone.getDefault()); expiryCal.setTimeZone(TimeZone.getDefault()); // Explicitly not using DatePickerDialog here! // DatePickerDialog is difficult to customize and has many problems (see old git versions) CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(activity); alert.setTitle(R.string.expiry_date_dialog_title); LayoutInflater inflater = activity.getLayoutInflater(); View view = inflater.inflate(R.layout.edit_subkey_expiry_dialog, null); alert.setView(view); final CheckBox noExpiry = (CheckBox) view.findViewById(R.id.edit_subkey_expiry_no_expiry); final DatePicker datePicker = (DatePicker) view.findViewById(R.id.edit_subkey_expiry_date_picker); final TextView currentExpiry = (TextView) view.findViewById(R.id.edit_subkey_expiry_current_expiry); final LinearLayout expiryLayout = (LinearLayout) view.findViewById(R.id.edit_subkey_expiry_layout); noExpiry.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { expiryLayout.setVisibility(View.GONE); } else { expiryLayout.setVisibility(View.VISIBLE); } } }); if (expiry == 0L) { noExpiry.setChecked(true); expiryLayout.setVisibility(View.GONE); currentExpiry.setText(R.string.btn_no_date); } else { noExpiry.setChecked(false); expiryLayout.setVisibility(View.VISIBLE); currentExpiry.setText(DateFormat.getDateFormat(getActivity()).format(expiryCal.getTime())); } // date picker works based on default time zone Calendar todayCal = Calendar.getInstance(TimeZone.getDefault()); if (creationCal.after(todayCal)) { // NOTE: This is just for the rare cases where creation is _after_ today // Min Date: Creation date + 1 day Calendar creationCalPlusOne = (Calendar) creationCal.clone(); creationCalPlusOne.add(Calendar.DAY_OF_YEAR, 1); datePicker.setMinDate(creationCalPlusOne.getTime().getTime()); datePicker.init(creationCalPlusOne.get(Calendar.YEAR), creationCalPlusOne.get(Calendar.MONTH), creationCalPlusOne.get(Calendar.DAY_OF_MONTH), null); } else { // Min Date: today + 1 day // at least one day after creation (today) todayCal.add(Calendar.DAY_OF_YEAR, 1); datePicker.setMinDate(todayCal.getTime().getTime()); datePicker.init(todayCal.get(Calendar.YEAR), todayCal.get(Calendar.MONTH), todayCal.get(Calendar.DAY_OF_MONTH), null); } alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { dismiss(); long expiry; if (noExpiry.isChecked()) { expiry = 0L; } else { Calendar selectedCal = Calendar.getInstance(TimeZone.getDefault()); //noinspection ResourceType selectedCal.set(datePicker.getYear(), datePicker.getMonth(), datePicker.getDayOfMonth()); // date picker uses default time zone, we need to convert to UTC selectedCal.setTimeZone(TimeZone.getTimeZone("UTC")); long numDays = (selectedCal.getTimeInMillis() / 86400000) - (creationCal.getTimeInMillis() / 86400000); if (numDays <= 0) { Activity activity = getActivity(); if (activity != null) { Notify.create(activity, R.string.error_expiry_past, Style.ERROR).show(); } return; } expiry = selectedCal.getTime().getTime() / 1000; } Bundle data = new Bundle(); data.putSerializable(MESSAGE_DATA_EXPIRY, expiry); sendMessageToHandler(MESSAGE_NEW_EXPIRY, data); } }); alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { dismiss(); } }); return alert.show(); } @Override public void onCancel(DialogInterface dialog) { super.onCancel(dialog); dismiss(); sendMessageToHandler(MESSAGE_CANCEL, null); } /** * Send message back to handler which is initialized in a activity * * @param what Message integer you want to send */ private void sendMessageToHandler(Integer what, Bundle data) { Message msg = Message.obtain(); msg.what = what; if (data != null) { msg.setData(data); } try { mMessenger.send(msg); } catch (RemoteException e) { Log.w(Constants.TAG, "Exception sending message, Is handler present?", e); } catch (NullPointerException e) { Log.w(Constants.TAG, "Messenger is null!", e); } } }