Java tutorial
/* * Copyright (C) 2012-2014 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.content.Intent; 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.support.v7.app.AlertDialog; import android.view.ContextThemeWrapper; import android.view.View; import android.widget.Button; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.ui.util.ThemeChanger; import org.sufficientlysecure.keychain.util.Log; import org.sufficientlysecure.keychain.network.orbot.OrbotHelper; /** * displays a dialog asking the user to enable Tor */ public class OrbotStartDialogFragment extends DialogFragment { private static final String ARG_MESSENGER = "messenger"; private static final String ARG_TITLE = "title"; private static final String ARG_MESSAGE = "message"; private static final String ARG_MIDDLE_BUTTON = "middleButton"; private static final int ORBOT_REQUEST_CODE = 1; public static final int MESSAGE_MIDDLE_BUTTON = 1; public static final int MESSAGE_DIALOG_CANCELLED = 2; // for either cancel or enable pressed public static final int MESSAGE_ORBOT_STARTED = 3; // for either cancel or enable pressed public static OrbotStartDialogFragment newInstance(Messenger messenger, int title, int message, int middleButton) { Bundle args = new Bundle(); args.putParcelable(ARG_MESSENGER, messenger); args.putInt(ARG_TITLE, title); args.putInt(ARG_MESSAGE, message); args.putInt(ARG_MIDDLE_BUTTON, middleButton); OrbotStartDialogFragment fragment = new OrbotStartDialogFragment(); fragment.setArguments(args); return fragment; } @NonNull @Override public Dialog onCreateDialog(Bundle savedInstanceState) { final Messenger messenger = getArguments().getParcelable(ARG_MESSENGER); int title = getArguments().getInt(ARG_TITLE); final int message = getArguments().getInt(ARG_MESSAGE); int middleButton = getArguments().getInt(ARG_MIDDLE_BUTTON); final Activity activity = getActivity(); ContextThemeWrapper theme = ThemeChanger.getDialogThemeWrapper(activity); CustomAlertDialogBuilder builder = new CustomAlertDialogBuilder(theme); builder.setTitle(title).setMessage(message); builder.setNegativeButton(R.string.orbot_start_dialog_cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Message msg = Message.obtain(); msg.what = MESSAGE_DIALOG_CANCELLED; try { messenger.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); } } }); builder.setNeutralButton(middleButton, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Message msg = new Message(); msg.what = MESSAGE_MIDDLE_BUTTON; try { messenger.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); } } }); builder.setPositiveButton(R.string.orbot_start_dialog_start, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // actual onClick defined in onStart, this is just to make the button appear } }); return builder.show(); } @Override public void onStart() { super.onStart(); //super.onStart() is where dialog.show() is actually called on the underlying dialog, // so we have to do it after this point AlertDialog d = (AlertDialog) getDialog(); if (d != null) { Button positiveButton = d.getButton(Dialog.BUTTON_POSITIVE); positiveButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startActivityForResult(OrbotHelper.getShowOrbotStartIntent(), ORBOT_REQUEST_CODE); } }); } } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == ORBOT_REQUEST_CODE) { // assume Orbot was started final Messenger messenger = getArguments().getParcelable(ARG_MESSENGER); Message msg = Message.obtain(); msg.what = MESSAGE_ORBOT_STARTED; try { messenger.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); } dismiss(); } } }