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.net.Uri; 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.ArrayAdapter; import android.widget.CheckBox; import android.widget.EditText; import android.widget.Spinner; import com.beardedhen.androidbootstrap.BootstrapButton; import com.devspark.appmsg.AppMsg; import org.thialfihar.android.apg.Constants; import org.thialfihar.android.apg.Id; import org.thialfihar.android.apg.R; import org.thialfihar.android.apg.helper.FileHelper; 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.DeleteFileDialogFragment; import org.thialfihar.android.apg.ui.dialog.FileDialogFragment; import org.thialfihar.android.apg.ui.dialog.PassphraseDialogFragment; import org.thialfihar.android.apg.util.Choice; import org.thialfihar.android.apg.util.Log; import java.io.File; public class EncryptFileFragment extends Fragment { public static final String ARG_FILENAME = "filename"; public static final String ARG_ASCII_ARMOR = "ascii_armor"; private static final int RESULT_CODE_FILE = 0x00007003; private EncryptActivityInterface mEncryptInterface; // view private CheckBox mAsciiArmor = null; private Spinner mFileCompression = null; private EditText mFilename = null; private CheckBox mDeleteAfter = null; private CheckBox mShareAfter = null; private BootstrapButton mBrowse = null; private View mEncryptFile; private FileDialogFragment mFileDialog; // model private String mInputFilename = null; private String mOutputFilename = null; @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_file_fragment, container, false); mEncryptFile = view.findViewById(R.id.action_encrypt_file); mEncryptFile.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { encryptClicked(); } }); mFilename = (EditText) view.findViewById(R.id.filename); mBrowse = (BootstrapButton) view.findViewById(R.id.btn_browse); mBrowse.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { FileHelper.openFile(EncryptFileFragment.this, mFilename.getText().toString(), "*/*", RESULT_CODE_FILE); } }); mFileCompression = (Spinner) view.findViewById(R.id.fileCompression); Choice[] choices = new Choice[] { new Choice(Constants.choice.compression.none, getString(R.string.choice_none) + " (" + getString(R.string.compression_fast) + ")"), new Choice(Constants.choice.compression.zip, "ZIP (" + getString(R.string.compression_fast) + ")"), new Choice(Constants.choice.compression.zlib, "ZLIB (" + getString(R.string.compression_fast) + ")"), new Choice(Constants.choice.compression.bzip2, "BZIP2 (" + getString(R.string.compression_very_slow) + ")"), }; ArrayAdapter<Choice> adapter = new ArrayAdapter<Choice>(getActivity(), android.R.layout.simple_spinner_item, choices); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); mFileCompression.setAdapter(adapter); int defaultFileCompression = Preferences.getPreferences(getActivity()).getDefaultFileCompression(); for (int i = 0; i < choices.length; ++i) { if (choices[i].getId() == defaultFileCompression) { mFileCompression.setSelection(i); break; } } mDeleteAfter = (CheckBox) view.findViewById(R.id.deleteAfterEncryption); mShareAfter = (CheckBox) view.findViewById(R.id.shareAfterEncryption); mAsciiArmor = (CheckBox) view.findViewById(R.id.asciiArmor); mAsciiArmor.setChecked(Preferences.getPreferences(getActivity()).getDefaultAsciiArmor()); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); String filename = getArguments().getString(ARG_FILENAME); if (filename != null) { mFilename.setText(filename); } boolean asciiArmor = getArguments().getBoolean(ARG_ASCII_ARMOR); if (asciiArmor) { mAsciiArmor.setChecked(asciiArmor); } } /** * Guess output filename based on input path * * @param path * @return Suggestion for output filename */ private String guessOutputFilename(String path) { // output in the same directory but with additional ending File file = new File(path); String ending = (mAsciiArmor.isChecked() ? ".asc" : ".gpg"); String outputFilename = file.getParent() + File.separator + file.getName() + ending; return outputFilename; } private void showOutputFileDialog() { // Message is received after file is selected Handler returnHandler = new Handler() { @Override public void handleMessage(Message message) { if (message.what == FileDialogFragment.MESSAGE_OKAY) { Bundle data = message.getData(); mOutputFilename = data.getString(FileDialogFragment.MESSAGE_DATA_FILENAME); encryptStart(); } } }; // Create a new Messenger for the communication back Messenger messenger = new Messenger(returnHandler); mFileDialog = FileDialogFragment.newInstance(messenger, getString(R.string.title_encrypt_to_file), getString(R.string.specify_file_to_encrypt_to), mOutputFilename, null); mFileDialog.show(getActivity().getSupportFragmentManager(), "fileDialog"); } private void encryptClicked() { String currentFilename = mFilename.getText().toString(); if (mInputFilename == null || !mInputFilename.equals(currentFilename)) { mInputFilename = mFilename.getText().toString(); } mOutputFilename = guessOutputFilename(mInputFilename); if (mInputFilename.equals("")) { AppMsg.makeText(getActivity(), R.string.no_file_selected, AppMsg.STYLE_ALERT).show(); return; } if (!mInputFilename.startsWith("content")) { File file = new File(mInputFilename); if (!file.exists() || !file.isFile()) { AppMsg.makeText(getActivity(), getString(R.string.error_message, getString(R.string.error_file_not_found)), AppMsg.STYLE_ALERT).show(); return; } } 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) { AppMsg.makeText(getActivity(), R.string.select_encryption_key, AppMsg.STYLE_ALERT).show(); return; } 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) { showOutputFileDialog(); } } }); return; } } showOutputFileDialog(); } private void encryptStart() { // 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_URI); 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()); } Log.d(Constants.TAG, "mInputFilename=" + mInputFilename + ", mOutputFilename=" + mOutputFilename); data.putString(ApgIntentService.ENCRYPT_INPUT_FILE, mInputFilename); data.putString(ApgIntentService.ENCRYPT_OUTPUT_FILE, mOutputFilename); boolean useAsciiArmor = mAsciiArmor.isChecked(); data.putBoolean(ApgIntentService.ENCRYPT_USE_ASCII_ARMOR, useAsciiArmor); int compressionId = ((Choice) mFileCompression.getSelectedItem()).getId(); data.putInt(ApgIntentService.ENCRYPT_COMPRESSION_ID, compressionId); intent.putExtra(ApgIntentService.EXTRA_DATA, data); // 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) { AppMsg.makeText(getActivity(), R.string.encrypt_sign_successful, AppMsg.STYLE_INFO).show(); if (mDeleteAfter.isChecked()) { // Create and show dialog to delete original file DeleteFileDialogFragment deleteFileDialog = DeleteFileDialogFragment .newInstance(mInputFilename); deleteFileDialog.show(getActivity().getSupportFragmentManager(), "deleteDialog"); } if (mShareAfter.isChecked()) { // Share encrypted file Intent sendFileIntent = new Intent(Intent.ACTION_SEND); sendFileIntent.setType("*/*"); sendFileIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(mOutputFilename)); startActivity(Intent.createChooser(sendFileIntent, getString(R.string.title_share_file))); } } } }; // 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); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case RESULT_CODE_FILE: { if (resultCode == Activity.RESULT_OK && data != null) { try { String path = FileHelper.getPath(getActivity(), data.getData()); Log.d(Constants.TAG, "path=" + path); mFilename.setText(path); } catch (NullPointerException e) { Log.e(Constants.TAG, "Nullpointer while retrieving path!"); } } return; } default: { super.onActivityResult(requestCode, resultCode, data); break; } } } }