Java tutorial
/* * Copyright 2011-2015 the original author or authors. * * 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 systems.soapbox.ombuds.client.ui; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.content.DialogInterface; import android.content.DialogInterface.OnCancelListener; import android.content.DialogInterface.OnClickListener; import android.content.Intent; import android.content.IntentFilter; import android.content.pm.PackageInfo; import android.content.res.Resources; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.support.design.widget.TabLayout; import android.support.v4.content.ContextCompat; import android.support.v4.view.ViewPager; import android.support.v7.widget.Toolbar; import android.text.format.DateUtils; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.CheckBox; import android.widget.EditText; import android.widget.Spinner; import android.widget.TextView; import com.google.common.base.Charsets; import com.gordonwong.materialsheetfab.MaterialSheetFab; import org.bitcoinj.core.Transaction; import org.bitcoinj.core.VerificationException; import org.bitcoinj.core.VersionedChecksummedBytes; import org.bitcoinj.core.Wallet; import org.bitcoinj.core.Wallet.BalanceType; import java.io.BufferedReader; import java.io.ByteArrayInputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.Collections; import java.util.Comparator; import java.util.LinkedList; import java.util.List; import systems.soapbox.ombuds.client.Configuration; import systems.soapbox.ombuds.client.Constants; import systems.soapbox.ombuds.client.WalletApplication; import systems.soapbox.ombuds.client.btc.data.PaymentIntent; import systems.soapbox.ombuds.client.ui.InputParser.StringInputParser; import systems.soapbox.ombuds.client.ui.omb.PublicRecordPagerAdapter; import systems.soapbox.ombuds.client.ui.omb.SearchActivity; import systems.soapbox.ombuds.client.ui.omb.SendBulletinActivity; import systems.soapbox.ombuds.client.ui.omb.SendFab; import systems.soapbox.ombuds.client.ui.preference.PreferenceActivity; import systems.soapbox.ombuds.client.ui.send.SendCoinsActivity; import systems.soapbox.ombuds.client.ui.send.SweepWalletActivity; import systems.soapbox.ombuds.client.util.CrashReporter; import systems.soapbox.ombuds.client.util.Crypto; import systems.soapbox.ombuds.client.util.Io; import systems.soapbox.ombuds.client.util.WalletUtils; import systems.soapbox.ombuds.client_test.R; /** * @author Andreas Schildbach */ public final class WalletActivity extends AbstractWalletActivity { private static final int DIALOG_RESTORE_WALLET = 0; private static final int DIALOG_LOW_STORAGE_ALERT = 1; private WalletApplication application; private Configuration config; private Wallet wallet; private MaterialSheetFab materialSheetFab; private Handler handler = new Handler(); private static final int REQUEST_CODE_SCAN = 0; @Override protected void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); application = getWalletApplication(); config = application.getConfiguration(); wallet = application.getWallet(); setContentView(R.layout.activity_ombuds); setupActionBar(); setupFab(); setupTabs(); if (savedInstanceState == null) checkAlerts(); config.touchLastUsed(); MaybeMaintenanceFragment.add(getFragmentManager()); } private void setupActionBar() { setSupportActionBar((Toolbar) findViewById(R.id.toolbar)); } private void setupFab() { SendFab fab = (SendFab) findViewById(R.id.fab); View sheetView = findViewById(R.id.fab_sheet); View overlay = findViewById(R.id.overlay); int sheetColor = ContextCompat.getColor(this, R.color.background_card); int fabColor = ContextCompat.getColor(this, R.color.theme_accent); // Create material sheet FAB materialSheetFab = new MaterialSheetFab<>(fab, sheetView, overlay, sheetColor, fabColor); // Set material sheet item click listeners final View sendCoinButton = findViewById(R.id.fab_sheet_item_send_coin); sendCoinButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(final View v) { handleSendCoins(); materialSheetFab.hideSheet(); } }); final View requestCoinButton = findViewById(R.id.fab_sheet_item_request_coin); requestCoinButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(final View v) { handleRequestCoins(); materialSheetFab.hideSheet(); } }); final View scanButton = findViewById(R.id.fab_sheet_item_scan); scanButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(final View v) { handleScan(); materialSheetFab.hideSheet(); } }); final View createBulletinButton = findViewById(R.id.fab_sheet_item_create_bulletin); createBulletinButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(final View v) { handleSendBulletin(); materialSheetFab.hideSheet(); } }); } private void setupTabs() { // Setup view pager ViewPager viewpager = (ViewPager) findViewById(R.id.viewpager); viewpager.setAdapter(new PublicRecordPagerAdapter(this, getFragmentManager())); viewpager.setOffscreenPageLimit(PublicRecordPagerAdapter.NUM_ITEMS); updatePage(viewpager.getCurrentItem()); // Setup tab layout final TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs); tabLayout.setupWithViewPager(viewpager); tabLayout.getTabAt(0).setIcon(R.drawable.ic_public_white_24dp); tabLayout.getTabAt(1).setIcon(R.drawable.ic_star_white_24dp); tabLayout.getTabAt(2).setIcon(R.drawable.ic_person_white_24dp); viewpager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int i, float v, int i1) { } @Override public void onPageSelected(int i) { updatePage(i); // tabLayout.getTabAt(0).setIcon(R.drawable.ic_add_grey_600_24dp); } @Override public void onPageScrollStateChanged(int i) { } }); } private void updatePage(int selectedPage) { updateFab(selectedPage); } private void updateFab(int selectedPage) { materialSheetFab.showFab(); // materialSheetFab.showFab(0, -getResources().getDimensionPixelSize(R.dimen.snackbar_height)); } @Override protected void onResume() { super.onResume(); handler.postDelayed(new Runnable() { @Override public void run() { // delayed start so that UI has enough time to initialize getWalletApplication().startBlockchainService(true); } }, 1000); checkLowStorageAlert(); } @Override protected void onPause() { handler.removeCallbacksAndMessages(null); super.onPause(); } @Override public void onActivityResult(final int requestCode, final int resultCode, final Intent intent) { if (requestCode == REQUEST_CODE_SCAN && resultCode == Activity.RESULT_OK) { final String input = intent.getStringExtra(ScanActivity.INTENT_EXTRA_RESULT); new StringInputParser(input) { @Override protected void handlePaymentIntent(final PaymentIntent paymentIntent) { SendCoinsActivity.start(WalletActivity.this, paymentIntent); } @Override protected void handlePrivateKey(final VersionedChecksummedBytes key) { SweepWalletActivity.start(WalletActivity.this, key); } @Override protected void handleDirectTransaction(final Transaction tx) throws VerificationException { application.processDirectTransaction(tx); } @Override protected void error(final int messageResId, final Object... messageArgs) { dialog(WalletActivity.this, null, R.string.button_scan, messageResId, messageArgs); } }.parse(); } } @Override public void onBackPressed() { if (materialSheetFab.isSheetVisible()) { materialSheetFab.hideSheet(); } else { super.onBackPressed(); } } @Override public boolean onCreateOptionsMenu(final Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.wallet_options, menu); return true; } @Override public boolean onPrepareOptionsMenu(final Menu menu) { super.onPrepareOptionsMenu(menu); final Resources res = getResources(); final String externalStorageState = Environment.getExternalStorageState(); menu.findItem(R.id.wallet_options_restore_wallet) .setEnabled(Environment.MEDIA_MOUNTED.equals(externalStorageState) || Environment.MEDIA_MOUNTED_READ_ONLY.equals(externalStorageState)); menu.findItem(R.id.wallet_options_backup_wallet) .setEnabled(Environment.MEDIA_MOUNTED.equals(externalStorageState)); menu.findItem(R.id.wallet_options_encrypt_keys) .setTitle(wallet.isEncrypted() ? R.string.wallet_options_encrypt_keys_change : R.string.wallet_options_encrypt_keys_set); return true; } @Override public boolean onOptionsItemSelected(final MenuItem item) { switch (item.getItemId()) { case R.id.action_search: startActivity(new Intent(this, SearchActivity.class)); return true; case R.id.wallet_options_address_book: AddressBookActivity.start(this); overridePendingTransition(R.anim.fade_in, R.anim.fade_out); return true; case R.id.wallet_options_sweep_wallet: SweepWalletActivity.start(this); overridePendingTransition(R.anim.fade_in, R.anim.fade_out); return true; case R.id.wallet_options_network_monitor: startActivity(new Intent(this, NetworkMonitorActivity.class)); overridePendingTransition(R.anim.fade_in, R.anim.fade_out); return true; case R.id.wallet_options_restore_wallet: showDialog(DIALOG_RESTORE_WALLET); return true; case R.id.wallet_options_backup_wallet: handleBackupWallet(); return true; case R.id.wallet_options_encrypt_keys: handleEncryptKeys(); return true; case R.id.wallet_options_preferences: startActivity(new Intent(this, PreferenceActivity.class)); return true; case R.id.wallet_options_safety: HelpDialogFragment.page(getFragmentManager(), R.string.help_safety); return true; case R.id.wallet_options_help: HelpDialogFragment.page(getFragmentManager(), R.string.help_wallet); return true; } return super.onOptionsItemSelected(item); } public void handleRequestCoins() { startActivity(new Intent(this, RequestCoinsActivity.class)); overridePendingTransition(R.anim.fade_in, R.anim.fade_out); } public void handleSendCoins() { startActivity(new Intent(this, SendCoinsActivity.class)); overridePendingTransition(R.anim.fade_in, R.anim.fade_out); } public void handleScan() { startActivityForResult(new Intent(this, ScanActivity.class), REQUEST_CODE_SCAN); overridePendingTransition(R.anim.fade_in, R.anim.fade_out); } public void handleSendBulletin() { startActivity(new Intent(this, SendBulletinActivity.class)); overridePendingTransition(R.anim.fade_in, R.anim.fade_out); } public void handleBackupWallet() { BackupWalletDialogFragment.show(getFragmentManager()); } public void handleEncryptKeys() { EncryptKeysDialogFragment.show(getFragmentManager()); } @Override protected Dialog onCreateDialog(final int id, final Bundle args) { if (id == DIALOG_RESTORE_WALLET) return createRestoreWalletDialog(); else if (id == DIALOG_LOW_STORAGE_ALERT) return createLowStorageAlertDialog(); else throw new IllegalArgumentException(); } @Override protected void onPrepareDialog(final int id, final Dialog dialog) { if (id == DIALOG_RESTORE_WALLET) prepareRestoreWalletDialog(dialog); } private Dialog createRestoreWalletDialog() { final View view = getLayoutInflater().inflate(R.layout.restore_wallet_dialog, null); final TextView messageView = (TextView) view.findViewById(R.id.restore_wallet_dialog_message); final Spinner fileView = (Spinner) view.findViewById(R.id.import_keys_from_storage_file); final EditText passwordView = (EditText) view.findViewById(R.id.import_keys_from_storage_password); final DialogBuilder dialog = new DialogBuilder(this); dialog.setTitle(R.string.import_keys_dialog_title); dialog.setView(view); dialog.setPositiveButton(R.string.import_keys_dialog_button_import, new OnClickListener() { @Override public void onClick(final DialogInterface dialog, final int which) { final File file = (File) fileView.getSelectedItem(); final String password = passwordView.getText().toString().trim(); passwordView.setText(null); // get rid of it asap if (WalletUtils.BACKUP_FILE_FILTER.accept(file)) restoreWalletFromProtobuf(file); else if (WalletUtils.KEYS_FILE_FILTER.accept(file)) restorePrivateKeysFromBase58(file); else if (Crypto.OPENSSL_FILE_FILTER.accept(file)) restoreWalletFromEncrypted(file, password); } }); dialog.setNegativeButton(R.string.button_cancel, new OnClickListener() { @Override public void onClick(final DialogInterface dialog, final int which) { passwordView.setText(null); // get rid of it asap } }); dialog.setOnCancelListener(new OnCancelListener() { @Override public void onCancel(final DialogInterface dialog) { passwordView.setText(null); // get rid of it asap } }); final FileAdapter adapter = new FileAdapter(this) { @Override public View getDropDownView(final int position, View row, final ViewGroup parent) { final File file = getItem(position); final boolean isExternal = Constants.Files.EXTERNAL_WALLET_BACKUP_DIR.equals(file.getParentFile()); final boolean isEncrypted = Crypto.OPENSSL_FILE_FILTER.accept(file); if (row == null) row = inflater.inflate(R.layout.restore_wallet_file_row, null); final TextView filenameView = (TextView) row .findViewById(R.id.wallet_import_keys_file_row_filename); filenameView.setText(file.getName()); final TextView securityView = (TextView) row .findViewById(R.id.wallet_import_keys_file_row_security); final String encryptedStr = context .getString(isEncrypted ? R.string.import_keys_dialog_file_security_encrypted : R.string.import_keys_dialog_file_security_unencrypted); final String storageStr = context .getString(isExternal ? R.string.import_keys_dialog_file_security_external : R.string.import_keys_dialog_file_security_internal); securityView.setText(encryptedStr + ", " + storageStr); final TextView createdView = (TextView) row.findViewById(R.id.wallet_import_keys_file_row_created); createdView.setText(context.getString( isExternal ? R.string.import_keys_dialog_file_created_manual : R.string.import_keys_dialog_file_created_automatic, DateUtils.getRelativeTimeSpanString(context, file.lastModified(), true))); return row; } }; final String path; final String backupPath = Constants.Files.EXTERNAL_WALLET_BACKUP_DIR.getAbsolutePath(); final String storagePath = Constants.Files.EXTERNAL_STORAGE_DIR.getAbsolutePath(); if (backupPath.startsWith(storagePath)) path = backupPath.substring(storagePath.length()); else path = backupPath; messageView.setText(getString(R.string.import_keys_dialog_message, path)); fileView.setAdapter(adapter); return dialog.create(); } private void prepareRestoreWalletDialog(final Dialog dialog) { final AlertDialog alertDialog = (AlertDialog) dialog; final List<File> files = new LinkedList<File>(); // external storage if (Constants.Files.EXTERNAL_WALLET_BACKUP_DIR.exists() && Constants.Files.EXTERNAL_WALLET_BACKUP_DIR.isDirectory()) for (final File file : Constants.Files.EXTERNAL_WALLET_BACKUP_DIR.listFiles()) if (Crypto.OPENSSL_FILE_FILTER.accept(file)) files.add(file); // internal storage for (final String filename : fileList()) if (filename.startsWith(Constants.Files.WALLET_KEY_BACKUP_PROTOBUF + '.')) files.add(new File(getFilesDir(), filename)); // sort Collections.sort(files, new Comparator<File>() { @Override public int compare(final File lhs, final File rhs) { return lhs.getName().compareToIgnoreCase(rhs.getName()); } }); final View replaceWarningView = alertDialog .findViewById(R.id.restore_wallet_from_storage_dialog_replace_warning); final boolean hasCoins = wallet.getBalance(BalanceType.ESTIMATED).signum() > 0; replaceWarningView.setVisibility(hasCoins ? View.VISIBLE : View.GONE); final Spinner fileView = (Spinner) alertDialog.findViewById(R.id.import_keys_from_storage_file); final FileAdapter adapter = (FileAdapter) fileView.getAdapter(); adapter.setFiles(files); fileView.setEnabled(!adapter.isEmpty()); final EditText passwordView = (EditText) alertDialog.findViewById(R.id.import_keys_from_storage_password); passwordView.setText(null); final ImportDialogButtonEnablerListener dialogButtonEnabler = new ImportDialogButtonEnablerListener( passwordView, alertDialog) { @Override protected boolean hasFile() { return fileView.getSelectedItem() != null; } @Override protected boolean needsPassword() { final File selectedFile = (File) fileView.getSelectedItem(); return selectedFile != null ? Crypto.OPENSSL_FILE_FILTER.accept(selectedFile) : false; } }; passwordView.addTextChangedListener(dialogButtonEnabler); fileView.setOnItemSelectedListener(dialogButtonEnabler); final CheckBox showView = (CheckBox) alertDialog.findViewById(R.id.import_keys_from_storage_show); showView.setOnCheckedChangeListener(new ShowPasswordCheckListener(passwordView)); } private void checkLowStorageAlert() { final Intent stickyIntent = registerReceiver(null, new IntentFilter(Intent.ACTION_DEVICE_STORAGE_LOW)); if (stickyIntent != null) showDialog(DIALOG_LOW_STORAGE_ALERT); } private Dialog createLowStorageAlertDialog() { final DialogBuilder dialog = DialogBuilder.warn(this, R.string.wallet_low_storage_dialog_title); dialog.setMessage(R.string.wallet_low_storage_dialog_msg); dialog.setPositiveButton(R.string.wallet_low_storage_dialog_button_apps, new DialogInterface.OnClickListener() { @Override public void onClick(final DialogInterface dialog, final int id) { startActivity(new Intent(android.provider.Settings.ACTION_MANAGE_APPLICATIONS_SETTINGS)); finish(); } }); dialog.setNegativeButton(R.string.button_dismiss, null); return dialog.create(); } private void checkAlerts() { final PackageInfo packageInfo = getWalletApplication().packageInfo(); if (CrashReporter.hasSavedCrashTrace()) { final StringBuilder stackTrace = new StringBuilder(); try { CrashReporter.appendSavedCrashTrace(stackTrace); } catch (final IOException x) { log.info("problem appending crash info", x); } final ReportIssueDialogBuilder dialog = new ReportIssueDialogBuilder(this, R.string.report_issue_dialog_title_crash, R.string.report_issue_dialog_message_crash) { @Override protected CharSequence subject() { return Constants.REPORT_SUBJECT_CRASH + " " + packageInfo.versionName; } @Override protected CharSequence collectApplicationInfo() throws IOException { final StringBuilder applicationInfo = new StringBuilder(); CrashReporter.appendApplicationInfo(applicationInfo, application); return applicationInfo; } @Override protected CharSequence collectStackTrace() throws IOException { if (stackTrace.length() > 0) return stackTrace; else return null; } @Override protected CharSequence collectDeviceInfo() throws IOException { final StringBuilder deviceInfo = new StringBuilder(); CrashReporter.appendDeviceInfo(deviceInfo, WalletActivity.this); return deviceInfo; } @Override protected CharSequence collectWalletDump() { return wallet.toString(false, true, true, null); } }; dialog.show(); } } private void restoreWalletFromEncrypted(final File file, final String password) { try { final BufferedReader cipherIn = new BufferedReader( new InputStreamReader(new FileInputStream(file), Charsets.UTF_8)); final StringBuilder cipherText = new StringBuilder(); Io.copy(cipherIn, cipherText, Constants.BACKUP_MAX_CHARS); cipherIn.close(); final byte[] plainText = Crypto.decryptBytes(cipherText.toString(), password.toCharArray()); final InputStream is = new ByteArrayInputStream(plainText); restoreWallet(WalletUtils.restoreWalletFromProtobufOrBase58(is, Constants.NETWORK_PARAMETERS)); log.info("successfully restored encrypted wallet: {}", file); } catch (final IOException x) { final DialogBuilder dialog = DialogBuilder.warn(this, R.string.import_export_keys_dialog_failure_title); dialog.setMessage(getString(R.string.import_keys_dialog_failure, x.getMessage())); dialog.setPositiveButton(R.string.button_dismiss, null); dialog.setNegativeButton(R.string.button_retry, new DialogInterface.OnClickListener() { @Override public void onClick(final DialogInterface dialog, final int id) { showDialog(DIALOG_RESTORE_WALLET); } }); dialog.show(); log.info("problem restoring wallet", x); } } private void restoreWalletFromProtobuf(final File file) { FileInputStream is = null; try { is = new FileInputStream(file); restoreWallet(WalletUtils.restoreWalletFromProtobuf(is, Constants.NETWORK_PARAMETERS)); log.info("successfully restored unencrypted wallet: {}", file); } catch (final IOException x) { final DialogBuilder dialog = DialogBuilder.warn(this, R.string.import_export_keys_dialog_failure_title); dialog.setMessage(getString(R.string.import_keys_dialog_failure, x.getMessage())); dialog.setPositiveButton(R.string.button_dismiss, null); dialog.setNegativeButton(R.string.button_retry, new DialogInterface.OnClickListener() { @Override public void onClick(final DialogInterface dialog, final int id) { showDialog(DIALOG_RESTORE_WALLET); } }); dialog.show(); log.info("problem restoring wallet", x); } finally { if (is != null) { try { is.close(); } catch (final IOException x2) { // swallow } } } } private void restorePrivateKeysFromBase58(final File file) { FileInputStream is = null; try { is = new FileInputStream(file); restoreWallet(WalletUtils.restorePrivateKeysFromBase58(is, Constants.NETWORK_PARAMETERS)); log.info("successfully restored unencrypted private keys: {}", file); } catch (final IOException x) { final DialogBuilder dialog = DialogBuilder.warn(this, R.string.import_export_keys_dialog_failure_title); dialog.setMessage(getString(R.string.import_keys_dialog_failure, x.getMessage())); dialog.setPositiveButton(R.string.button_dismiss, null); dialog.setNegativeButton(R.string.button_retry, new DialogInterface.OnClickListener() { @Override public void onClick(final DialogInterface dialog, final int id) { showDialog(DIALOG_RESTORE_WALLET); } }); dialog.show(); log.info("problem restoring private keys", x); } finally { if (is != null) { try { is.close(); } catch (final IOException x2) { // swallow } } } } private void restoreWallet(final Wallet wallet) throws IOException { application.replaceWallet(wallet); config.disarmBackupReminder(); final DialogBuilder dialog = new DialogBuilder(this); final StringBuilder message = new StringBuilder(); message.append(getString(R.string.restore_wallet_dialog_success)); message.append("\n\n"); message.append(getString(R.string.restore_wallet_dialog_success_replay)); dialog.setMessage(message); dialog.setNeutralButton(R.string.button_ok, new DialogInterface.OnClickListener() { @Override public void onClick(final DialogInterface dialog, final int id) { getWalletApplication().resetBlockchain(); finish(); } }); dialog.show(); } }