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; import android.app.ProgressDialog; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.os.Message; import android.os.Messenger; import android.support.v4.app.FragmentActivity; import android.widget.Toast; import com.google.zxing.integration.android.IntentIntegrator; import com.google.zxing.integration.android.IntentResult; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.api.OpenKeychainIntents; import org.sufficientlysecure.keychain.keyimport.ParcelableKeyRing; import org.sufficientlysecure.keychain.operations.results.ImportKeyResult; import org.sufficientlysecure.keychain.operations.results.OperationResult; import org.sufficientlysecure.keychain.operations.results.SingletonResult; import org.sufficientlysecure.keychain.service.KeychainIntentService; import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler; import org.sufficientlysecure.keychain.util.IntentIntegratorSupportV4; import org.sufficientlysecure.keychain.util.Log; import org.sufficientlysecure.keychain.util.Preferences; import java.util.ArrayList; import java.util.Locale; /** * Proxy activity (just a transparent content view) to scan QR Codes using the Barcode Scanner app */ public class QrCodeScanActivity extends FragmentActivity { public static final String ACTION_QR_CODE_API = OpenKeychainIntents.IMPORT_KEY_FROM_QR_CODE; public static final String ACTION_SCAN_WITH_RESULT = Constants.INTENT_PREFIX + "SCAN_QR_CODE_WITH_RESULT"; boolean returnResult; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // this activity itself has no content view (see manifest) handleActions(getIntent()); } protected void handleActions(Intent intent) { String action = intent.getAction(); Uri dataUri = intent.getData(); String scheme = intent.getScheme(); if (scheme != null && scheme.toLowerCase(Locale.ENGLISH).equals(Constants.FINGERPRINT_SCHEME)) { // Scanning a fingerprint directly with Barcode Scanner, thus we already have scanned returnResult = false; startCertify(dataUri); } else if (ACTION_SCAN_WITH_RESULT.equals(action)) { // scan using xzing's Barcode Scanner and return result parcel in OpenKeychain returnResult = true; new IntentIntegrator(this).initiateScan(); } else if (ACTION_QR_CODE_API.equals(action)) { // scan using xzing's Barcode Scanner from outside OpenKeychain returnResult = false; new IntentIntegrator(this).initiateScan(); } else { Log.e(Constants.TAG, "No valid scheme or action given!"); finish(); } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == IntentIntegratorSupportV4.REQUEST_CODE) { IntentResult scanResult = IntentIntegratorSupportV4.parseActivityResult(requestCode, resultCode, data); if (scanResult != null && scanResult.getFormatName() != null) { String scannedContent = scanResult.getContents(); Log.d(Constants.TAG, "scannedContent: " + scannedContent); startCertify(Uri.parse(scanResult.getContents())); } else { Log.e(Constants.TAG, "scanResult or formatName null! Should not happen!"); finish(); } return; } // if a result has been returned, return it down to other activity if (data != null && data.hasExtra(OperationResult.EXTRA_RESULT)) { returnResult(data); } else { super.onActivityResult(requestCode, resultCode, data); } } public void returnResult(Intent data) { if (returnResult) { setResult(RESULT_OK, data); finish(); } else { // display last log message but as Toast for calls from outside OpenKeychain OperationResult result = data.getParcelableExtra(OperationResult.EXTRA_RESULT); String str = getString(result.getLog().getLast().mType.getMsgId()); Toast.makeText(this, str, Toast.LENGTH_LONG).show(); finish(); } } public void startCertify(Uri dataUri) { // example: openpgp4fpr:73EE2314F65FA92EC2390D3A718C070100012282 if (dataUri.getScheme().equals(Constants.FINGERPRINT_SCHEME)) { String fingerprint = dataUri.getEncodedSchemeSpecificPart().toLowerCase(Locale.ENGLISH); importKeys(fingerprint); } else { SingletonResult result = new SingletonResult(SingletonResult.RESULT_ERROR, OperationResult.LogType.MSG_WRONG_QR_CODE); Intent intent = new Intent(); intent.putExtra(SingletonResult.EXTRA_RESULT, result); returnResult(intent); } } public void importKeys(String fingerprint) { // Message is received after importing is done in KeychainIntentService KeychainIntentServiceHandler serviceHandler = new KeychainIntentServiceHandler(this, getString(R.string.progress_importing), ProgressDialog.STYLE_HORIZONTAL, true) { public void handleMessage(Message message) { // handle messages by standard KeychainIntentServiceHandler first super.handleMessage(message); if (message.arg1 == KeychainIntentServiceHandler.MESSAGE_OKAY) { // get returned data bundle Bundle returnData = message.getData(); if (returnData == null) { finish(); return; } final ImportKeyResult result = returnData.getParcelable(OperationResult.EXTRA_RESULT); if (result == null) { Log.e(Constants.TAG, "result == null"); finish(); return; } if (!result.success()) { // only return if no success... Intent data = new Intent(); data.putExtras(returnData); returnResult(data); return; } Intent certifyIntent = new Intent(QrCodeScanActivity.this, CertifyKeyActivity.class); certifyIntent.putExtra(CertifyKeyActivity.EXTRA_RESULT, result); certifyIntent.putExtra(CertifyKeyActivity.EXTRA_KEY_IDS, result.getImportedMasterKeyIds()); startActivityForResult(certifyIntent, 0); } } }; // search config Preferences prefs = Preferences.getPreferences(this); Preferences.CloudSearchPrefs cloudPrefs = new Preferences.CloudSearchPrefs(true, true, prefs.getPreferredKeyserver()); // Send all information needed to service to query keys in other thread Intent intent = new Intent(this, KeychainIntentService.class); intent.setAction(KeychainIntentService.ACTION_IMPORT_KEYRING); // fill values for this action Bundle data = new Bundle(); data.putString(KeychainIntentService.IMPORT_KEY_SERVER, cloudPrefs.keyserver); ParcelableKeyRing keyEntry = new ParcelableKeyRing(fingerprint, null, null); ArrayList<ParcelableKeyRing> selectedEntries = new ArrayList<ParcelableKeyRing>(); selectedEntries.add(keyEntry); data.putParcelableArrayList(KeychainIntentService.IMPORT_KEY_LIST, selectedEntries); intent.putExtra(KeychainIntentService.EXTRA_DATA, data); // Create a new Messenger for the communication back Messenger messenger = new Messenger(serviceHandler); intent.putExtra(KeychainIntentService.EXTRA_MESSENGER, messenger); // show progress dialog serviceHandler.showProgressDialog(this); // start service with intent startService(intent); } }