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.thialfihar.android.apg.ui; import android.app.Activity; import android.app.ProgressDialog; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.os.Messenger; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import com.devspark.appmsg.AppMsg; import org.thialfihar.android.apg.Constants; import org.thialfihar.android.apg.R; import org.thialfihar.android.apg.compatibility.ClipboardReflection; import org.thialfihar.android.apg.helper.Preferences; import org.thialfihar.android.apg.service.ApgIntentService; import org.thialfihar.android.apg.service.ApgIntentServiceHandler; import org.thialfihar.android.apg.service.PassphraseCacheService; import org.thialfihar.android.apg.ui.dialog.PassphraseDialogFragment; import org.thialfihar.android.apg.util.Log; public class EncryptMessageFragment extends Fragment { public static final String ARG_TEXT = "text"; private boolean mLegacyMode = false; private TextView mMessage = null; private View mEncryptShare; private View mEncryptClipboard; private EncryptActivityInterface mEncryptInterface; @Override public void onAttach(Activity activity) { super.onAttach(activity); try { mEncryptInterface = (EncryptActivityInterface) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement EncryptActivityInterface"); } } /** * Inflate the layout for this fragment */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.encrypt_message_fragment, container, false); mMessage = (TextView) view.findViewById(R.id.message); mEncryptClipboard = view.findViewById(R.id.action_encrypt_clipboard); mEncryptShare = view.findViewById(R.id.action_encrypt_share); mEncryptClipboard.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { encryptClicked(true); } }); mEncryptShare.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { encryptClicked(false); } }); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); String text = getArguments().getString(ARG_TEXT); if (text != null) { mMessage.setText(text); } } @Override public void onStart() { super.onStart(); mLegacyMode = mEncryptInterface.getLegacyMode(); if (mLegacyMode) { encryptClicked(true); } } /** * Fixes bad message characters for gmail * * @param message * @return */ private String fixBadCharactersForGmail(String message) { // fix the message a bit, trailing spaces and newlines break stuff, // because GMail sends as HTML and such things fuck up the // signature, // TODO: things like "<" and ">" also fuck up the signature message = message.replaceAll(" +\n", "\n"); message = message.replaceAll("\n\n+", "\n\n"); message = message.replaceFirst("^\n+", ""); // make sure there'll be exactly one newline at the end message = message.replaceFirst("\n*$", "\n"); return message; } private void encryptClicked(final boolean toClipboard) { if (mEncryptInterface.isModeSymmetric()) { // symmetric encryption boolean gotPassphrase = (mEncryptInterface.getPassphrase() != null && mEncryptInterface.getPassphrase().length() != 0); if (!gotPassphrase) { AppMsg.makeText(getActivity(), R.string.passphrase_must_not_be_empty, AppMsg.STYLE_ALERT).show(); return; } if (!mEncryptInterface.getPassphrase().equals(mEncryptInterface.getPassphraseAgain())) { AppMsg.makeText(getActivity(), R.string.passphrases_do_not_match, AppMsg.STYLE_ALERT).show(); return; } } else { // asymmetric encryption boolean gotEncryptionKeys = (mEncryptInterface.getEncryptionKeys() != null && mEncryptInterface.getEncryptionKeys().length > 0); if (!gotEncryptionKeys && mEncryptInterface.getSignatureKey() == 0) { AppMsg.makeText(getActivity(), R.string.select_encryption_or_signature_key, AppMsg.STYLE_ALERT) .show(); return; } if (mEncryptInterface.getSignatureKey() != 0 && PassphraseCacheService .getCachedPassphrase(getActivity(), mEncryptInterface.getSignatureKey()) == null) { PassphraseDialogFragment.show(getActivity(), mEncryptInterface.getSignatureKey(), new Handler() { @Override public void handleMessage(Message message) { if (message.what == PassphraseDialogFragment.MESSAGE_OKAY) { encryptStart(toClipboard); } } }); return; } } encryptStart(toClipboard); } private void encryptStart(final boolean toClipboard) { // Send all information needed to service to edit key in other thread Intent intent = new Intent(getActivity(), ApgIntentService.class); intent.setAction(ApgIntentService.ACTION_ENCRYPT_SIGN); // fill values for this action Bundle data = new Bundle(); data.putInt(ApgIntentService.TARGET, ApgIntentService.TARGET_BYTES); String message = mMessage.getText().toString(); if (mEncryptInterface.isModeSymmetric()) { Log.d(Constants.TAG, "Symmetric encryption enabled!"); String passphrase = mEncryptInterface.getPassphrase(); if (passphrase.length() == 0) { passphrase = null; } data.putString(ApgIntentService.ENCRYPT_SYMMETRIC_PASSPHRASE, passphrase); } else { data.putLong(ApgIntentService.ENCRYPT_SIGNATURE_KEY_ID, mEncryptInterface.getSignatureKey()); data.putLongArray(ApgIntentService.ENCRYPT_ENCRYPTION_KEYS_IDS, mEncryptInterface.getEncryptionKeys()); boolean signOnly = (mEncryptInterface.getEncryptionKeys() == null || mEncryptInterface.getEncryptionKeys().length == 0); if (signOnly) { message = fixBadCharactersForGmail(message); } } data.putByteArray(ApgIntentService.ENCRYPT_MESSAGE_BYTES, message.getBytes()); data.putBoolean(ApgIntentService.ENCRYPT_USE_ASCII_ARMOR, true); int compressionId = Preferences.getPreferences(getActivity()).getDefaultMessageCompression(); data.putInt(ApgIntentService.ENCRYPT_COMPRESSION_ID, compressionId); intent.putExtra(ApgIntentService.EXTRA_DATA, data); final Activity activity = getActivity(); // Message is received after encrypting is done in ApgIntentService ApgIntentServiceHandler saveHandler = new ApgIntentServiceHandler(getActivity(), getString(R.string.progress_encrypting), ProgressDialog.STYLE_HORIZONTAL) { public void handleMessage(Message message) { // handle messages by standard ApgIntentServiceHandler first super.handleMessage(message); if (message.arg1 == ApgIntentServiceHandler.MESSAGE_OKAY) { // get returned data bundle Bundle data = message.getData(); String output = new String(data.getByteArray(ApgIntentService.RESULT_BYTES)); Log.d(Constants.TAG, "output: " + output); if (mLegacyMode) { Intent result = new Intent(); result.putExtra("encryptedMessage", output); activity.setResult(activity.RESULT_OK, result); activity.finish(); return; } else if (toClipboard) { ClipboardReflection.copyToClipboard(getActivity(), output); AppMsg.makeText(getActivity(), R.string.encrypt_sign_clipboard_successful, AppMsg.STYLE_INFO).show(); } else { Intent sendIntent = new Intent(Intent.ACTION_SEND); // Type is set to text/plain so that encrypted messages can // be sent with Whatsapp, Hangouts, SMS etc... sendIntent.setType("text/plain"); sendIntent.putExtra(Intent.EXTRA_TEXT, output); startActivity(Intent.createChooser(sendIntent, getString(R.string.title_share_with))); } } } }; // Create a new Messenger for the communication back Messenger messenger = new Messenger(saveHandler); intent.putExtra(ApgIntentService.EXTRA_MESSENGER, messenger); // show progress dialog saveHandler.showProgressDialog(getActivity()); // start service with intent getActivity().startService(intent); } }