Java tutorial
/* * Copyright (C) 2012-2014 Dominik Schrmann <dominik@dominikschuermann.de> * Copyright (C) 2011 Senecaso * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.thialfihar.android.apg.ui; import android.annotation.SuppressLint; import android.app.ProgressDialog; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.nfc.NdefMessage; import android.nfc.NfcAdapter; import android.os.Bundle; import android.os.Message; import android.os.Messenger; import android.os.Parcelable; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.ActionBar; import android.view.View; import android.view.View.OnClickListener; import android.widget.ArrayAdapter; import com.beardedhen.androidbootstrap.BootstrapButton; import com.devspark.appmsg.AppMsg; import org.thialfihar.android.apg.Constants; import org.thialfihar.android.apg.R; import org.thialfihar.android.apg.pgp.PgpKeyHelper; import org.thialfihar.android.apg.service.ApgIntentService; import org.thialfihar.android.apg.service.ApgIntentServiceHandler; import org.thialfihar.android.apg.ui.adapter.ImportKeysListEntry; import org.thialfihar.android.apg.ui.dialog.BadImportKeyDialogFragment; import org.thialfihar.android.apg.util.Log; import java.util.ArrayList; import java.util.Locale; public class ImportKeysActivity extends DrawerActivity implements ActionBar.OnNavigationListener { public static final String ACTION_IMPORT_KEY = Constants.INTENT_PREFIX + "IMPORT_KEY"; public static final String ACTION_IMPORT_KEY_FROM_QR_CODE = Constants.INTENT_PREFIX + "IMPORT_KEY_FROM_QR_CODE"; public static final String ACTION_IMPORT_KEY_FROM_KEYSERVER = Constants.INTENT_PREFIX + "IMPORT_KEY_FROM_KEYSERVER"; // TODO: implement: public static final String ACTION_IMPORT_KEY_FROM_KEYSERVER_AND_RETURN = Constants.INTENT_PREFIX + "IMPORT_KEY_FROM_KEY_SERVER_AND_RETURN"; // Actions for internal use only: public static final String ACTION_IMPORT_KEY_FROM_FILE = Constants.INTENT_PREFIX + "IMPORT_KEY_FROM_FILE"; public static final String ACTION_IMPORT_KEY_FROM_NFC = Constants.INTENT_PREFIX + "IMPORT_KEY_FROM_NFC"; // only used by ACTION_IMPORT_KEY public static final String EXTRA_KEY_BYTES = "key_bytes"; // only used by ACTION_IMPORT_KEY_FROM_KEYSERVER public static final String EXTRA_QUERY = "query"; public static final String EXTRA_KEY_ID = "key_id"; public static final String EXTRA_FINGERPRINT = "fingerprint"; // view private ImportKeysListFragment mListFragment; private String[] mNavigationStrings; private Fragment mCurrentFragment; private BootstrapButton mImportButton; private static final Class[] NAVIGATION_CLASSES = new Class[] { ImportKeysServerFragment.class, ImportKeysFileFragment.class, ImportKeysQrCodeFragment.class, ImportKeysClipboardFragment.class, ImportKeysNFCFragment.class }; private int mCurrentNavPostition = -1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.import_keys_activity); mImportButton = (BootstrapButton) findViewById(R.id.import_import); mImportButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { importKeys(); } }); getSupportActionBar().setDisplayShowTitleEnabled(false); setupDrawerNavigation(savedInstanceState); // set drop down navigation mNavigationStrings = getResources().getStringArray(R.array.import_action_list); Context context = getSupportActionBar().getThemedContext(); ArrayAdapter<CharSequence> navigationAdapter = ArrayAdapter.createFromResource(context, R.array.import_action_list, android.R.layout.simple_spinner_dropdown_item); getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST); getSupportActionBar().setListNavigationCallbacks(navigationAdapter, this); handleActions(savedInstanceState, getIntent()); } protected void handleActions(Bundle savedInstanceState, Intent intent) { String action = intent.getAction(); Bundle extras = intent.getExtras(); Uri dataUri = intent.getData(); String scheme = intent.getScheme(); if (extras == null) { extras = new Bundle(); } if (Intent.ACTION_VIEW.equals(action)) { // Android's Action when opening file associated to Keychain (see AndroidManifest.xml) // override action to delegate it to Keychain's ACTION_IMPORT_KEY action = ACTION_IMPORT_KEY; } if (scheme != null && scheme.toLowerCase(Locale.ENGLISH).equals(Constants.FINGERPRINT_SCHEME)) { /* Scanning a fingerprint directly with Barcode Scanner */ loadFromFingerprintUri(savedInstanceState, dataUri); } else if (ACTION_IMPORT_KEY.equals(action)) { /* Keychain's own Actions */ // display file fragment loadNavFragment(1, null); if (dataUri != null) { // action: directly load data startListFragment(savedInstanceState, null, dataUri, null); } else if (extras.containsKey(EXTRA_KEY_BYTES)) { byte[] importData = intent.getByteArrayExtra(EXTRA_KEY_BYTES); // action: directly load data startListFragment(savedInstanceState, importData, null, null); } } else if (ACTION_IMPORT_KEY_FROM_KEYSERVER.equals(action)) { String query = null; if (extras.containsKey(EXTRA_QUERY)) { query = extras.getString(EXTRA_QUERY); } else if (extras.containsKey(EXTRA_KEY_ID)) { long keyId = intent.getLongExtra(EXTRA_KEY_ID, 0); if (keyId != 0) { query = PgpKeyHelper.convertKeyIdToHex(keyId); } } else if (extras.containsKey(EXTRA_FINGERPRINT)) { String fingerprint = intent.getStringExtra(EXTRA_FINGERPRINT); if (fingerprint != null) { query = "0x" + fingerprint; } } else { Log.e(Constants.TAG, "IMPORT_KEY_FROM_KEYSERVER action needs to contain the 'query', " + "'key_id', or 'fingerprint' extra!"); return; } // display keyserver fragment with query Bundle args = new Bundle(); args.putString(ImportKeysServerFragment.ARG_QUERY, query); loadNavFragment(0, args); // action: search immediately startListFragment(savedInstanceState, null, null, query); } else if (ACTION_IMPORT_KEY_FROM_FILE.equals(action)) { // NOTE: this only displays the appropriate fragment, no actions are taken loadNavFragment(1, null); // no immediate actions! startListFragment(savedInstanceState, null, null, null); } else if (ACTION_IMPORT_KEY_FROM_QR_CODE.equals(action)) { // also exposed in AndroidManifest // NOTE: this only displays the appropriate fragment, no actions are taken loadNavFragment(2, null); // no immediate actions! startListFragment(savedInstanceState, null, null, null); } else if (ACTION_IMPORT_KEY_FROM_NFC.equals(action)) { // NOTE: this only displays the appropriate fragment, no actions are taken loadNavFragment(3, null); // no immediate actions! startListFragment(savedInstanceState, null, null, null); } else { startListFragment(savedInstanceState, null, null, null); } } private void startListFragment(Bundle savedInstanceState, byte[] bytes, Uri dataUri, String serverQuery) { // However, if we're being restored from a previous state, // then we don't need to do anything and should return or else // we could end up with overlapping fragments. if (savedInstanceState != null) { return; } // Create an instance of the fragment mListFragment = ImportKeysListFragment.newInstance(bytes, dataUri, serverQuery); // Add the fragment to the 'fragment_container' FrameLayout // NOTE: We use commitAllowingStateLoss() to prevent weird crashes! getSupportFragmentManager().beginTransaction().replace(R.id.import_keys_list_container, mListFragment) .commitAllowingStateLoss(); // do it immediately! getSupportFragmentManager().executePendingTransactions(); } /** * "Basically, when using a list navigation, onNavigationItemSelected() is automatically * called when your activity is created/re-created, whether you like it or not. To prevent * your Fragment's onCreateView() from being called twice, this initial automatic call to * onNavigationItemSelected() should check whether the Fragment is already in existence * inside your Activity." * <p/> * from http://bit.ly/1dBYThO * <p/> * In our case, if we start ImportKeysActivity with parameters to directly search using a fingerprint, * the fragment would be loaded twice resulting in the query being empty after the second load. * <p/> * Our solution: * To prevent that a fragment will be loaded again even if it was already loaded loadNavFragment * checks against mCurrentNavPostition. * * @param itemPosition * @param itemId * @return */ @Override public boolean onNavigationItemSelected(int itemPosition, long itemId) { Log.d(Constants.TAG, "onNavigationItemSelected"); loadNavFragment(itemPosition, null); return true; } private void loadNavFragment(int itemPosition, Bundle args) { if (mCurrentNavPostition != itemPosition) { getSupportActionBar().setSelectedNavigationItem(itemPosition); loadFragment(NAVIGATION_CLASSES[itemPosition], args, mNavigationStrings[itemPosition]); mCurrentNavPostition = itemPosition; } } private void loadFragment(Class<?> clss, Bundle args, String tag) { mCurrentFragment = Fragment.instantiate(this, clss.getName(), args); FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); // Replace whatever is in the fragment container with this fragment // and give the fragment a tag name equal to the string at the position selected ft.replace(R.id.import_navigation_fragment, mCurrentFragment, tag); // Apply changes ft.commit(); } public void loadFromFingerprintUri(Bundle savedInstanceState, Uri dataUri) { String fingerprint = dataUri.toString().split(":")[1].toLowerCase(Locale.ENGLISH); Log.d(Constants.TAG, "fingerprint: " + fingerprint); if (fingerprint.length() < 16) { AppMsg.makeText(this, R.string.import_qr_code_too_short_fingerprint, AppMsg.STYLE_ALERT).show(); return; } String query = "0x" + fingerprint; // display keyserver fragment with query Bundle args = new Bundle(); args.putString(ImportKeysServerFragment.ARG_QUERY, query); loadNavFragment(0, args); // action: search directly startListFragment(savedInstanceState, null, null, query); } public void loadCallback(byte[] importData, Uri dataUri, String serverQuery, String keyServer) { mListFragment.loadNew(importData, dataUri, serverQuery, keyServer); } // private void importAndSignOld(final long keyId, final String expectedFingerprint) { // if (expectedFingerprint != null && expectedFingerprint.length() > 0) { // // Thread t = new Thread() { // @Override // public void run() { // try { // // TODO: display some sort of spinner here while the user waits // // // TODO: there should be only 1 // HkpKeyServer server = new HkpKeyServer(mPreferences.getKeyServers()[0]); // String encodedKey = server.get(keyId); // // PGPKeyRing keyring = PGPHelper.decodeKeyRing(new ByteArrayInputStream( // encodedKey.getBytes())); // if (keyring != null && keyring instanceof PGPPublicKeyRing) { // PGPPublicKeyRing publicKeyRing = (PGPPublicKeyRing) keyring; // // // make sure the fingerprints match before we cache this thing // String actualFingerprint = PGPHelper.convertFingerprintToHex(publicKeyRing // .getPublicKey().getFingerprint()); // if (expectedFingerprint.equals(actualFingerprint)) { // // store the signed key in our local cache // int retval = PGPMain.storeKeyRingInCache(publicKeyRing); // if (retval != Id.return_value.ok // && retval != Id.return_value.updated) { // status.putString(EXTRA_ERROR, // "Failed to store signed key in local cache"); // } else { // Intent intent = new Intent(ImportFromQRCodeActivity.this, // SignKeyActivity.class); // intent.putExtra(EXTRA_KEY_ID, keyId); // startActivityForResult(intent, Id.request.sign_key); // } // } else { // status.putString( // EXTRA_ERROR, // "Scanned fingerprint does NOT match the fingerprint of the received key. " + // "You shouldnt trust this key."); // } // } // } catch (QueryException e) { // Log.e(TAG, "Failed to query KeyServer", e); // status.putString(EXTRA_ERROR, "Failed to query KeyServer"); // status.putInt(Constants.extras.STATUS, Id.message.done); // } catch (IOException e) { // Log.e(TAG, "Failed to query KeyServer", e); // status.putString(EXTRA_ERROR, "Failed to query KeyServer"); // status.putInt(Constants.extras.STATUS, Id.message.done); // } // } // }; // // t.setName("KeyExchange Download Thread"); // t.setDaemon(true); // t.start(); // } // } /** * Import keys with mImportData */ public void importKeys() { // Message is received after importing is done in ApgService ApgIntentServiceHandler mSaveHandler = new ApgIntentServiceHandler(this, getString(R.string.progress_importing), 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 returnData = message.getData(); int added = returnData.getInt(ApgIntentService.RESULT_IMPORT_ADDED); int updated = returnData.getInt(ApgIntentService.RESULT_IMPORT_UPDATED); int bad = returnData.getInt(ApgIntentService.RESULT_IMPORT_BAD); String toastMessage; if (added > 0 && updated > 0) { String addedStr = getResources().getQuantityString(R.plurals.keys_added_and_updated_1, added, added); String updatedStr = getResources().getQuantityString(R.plurals.keys_added_and_updated_2, updated, updated); toastMessage = addedStr + updatedStr; } else if (added > 0) { toastMessage = getResources().getQuantityString(R.plurals.keys_added, added, added); } else if (updated > 0) { toastMessage = getResources().getQuantityString(R.plurals.keys_updated, updated, updated); } else { toastMessage = getString(R.string.no_keys_added_or_updated); } AppMsg.makeText(ImportKeysActivity.this, toastMessage, AppMsg.STYLE_INFO).show(); if (bad > 0) { BadImportKeyDialogFragment badImportKeyDialogFragment = BadImportKeyDialogFragment .newInstance(bad); badImportKeyDialogFragment.show(getSupportFragmentManager(), "badKeyDialog"); } } } }; if (mListFragment.getKeyBytes() != null || mListFragment.getDataUri() != null) { Log.d(Constants.TAG, "importKeys started"); // Send all information needed to service to import key in other thread Intent intent = new Intent(this, ApgIntentService.class); intent.setAction(ApgIntentService.ACTION_IMPORT_KEYRING); // fill values for this action Bundle data = new Bundle(); // get selected key entries ArrayList<ImportKeysListEntry> selectedEntries = mListFragment.getSelectedData(); data.putParcelableArrayList(ApgIntentService.IMPORT_KEY_LIST, selectedEntries); intent.putExtra(ApgIntentService.EXTRA_DATA, data); // Create a new Messenger for the communication back Messenger messenger = new Messenger(mSaveHandler); intent.putExtra(ApgIntentService.EXTRA_MESSENGER, messenger); // show progress dialog mSaveHandler.showProgressDialog(this); // start service with intent startService(intent); } else if (mListFragment.getServerQuery() != null) { // Send all information needed to service to query keys in other thread Intent intent = new Intent(this, ApgIntentService.class); intent.setAction(ApgIntentService.ACTION_DOWNLOAD_AND_IMPORT_KEYS); // fill values for this action Bundle data = new Bundle(); data.putString(ApgIntentService.DOWNLOAD_KEY_SERVER, mListFragment.getKeyServer()); // get selected key entries ArrayList<ImportKeysListEntry> selectedEntries = mListFragment.getSelectedData(); data.putParcelableArrayList(ApgIntentService.DOWNLOAD_KEY_LIST, selectedEntries); intent.putExtra(ApgIntentService.EXTRA_DATA, data); // Create a new Messenger for the communication back Messenger messenger = new Messenger(mSaveHandler); intent.putExtra(ApgIntentService.EXTRA_MESSENGER, messenger); // show progress dialog mSaveHandler.showProgressDialog(this); // start service with intent startService(intent); } else { AppMsg.makeText(this, R.string.error_nothing_import, AppMsg.STYLE_ALERT).show(); } } /** * NFC */ @Override public void onResume() { super.onResume(); // Check to see that the Activity started due to an Android Beam if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) { handleActionNdefDiscovered(getIntent()); } } /** * NFC */ @Override public void onNewIntent(Intent intent) { // onResume gets called after this to handle the intent setIntent(intent); } /** * NFC: Parses the NDEF Message from the intent and prints to the TextView */ @SuppressLint("NewApi") void handleActionNdefDiscovered(Intent intent) { Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES); // only one message sent during the beam NdefMessage msg = (NdefMessage) rawMsgs[0]; // record 0 contains the MIME type, record 1 is the AAR, if present byte[] receivedKeyringBytes = msg.getRecords()[0].getPayload(); Intent importIntent = new Intent(this, ImportKeysActivity.class); importIntent.setAction(ImportKeysActivity.ACTION_IMPORT_KEY); importIntent.putExtra(ImportKeysActivity.EXTRA_KEY_BYTES, receivedKeyringBytes); handleActions(null, importIntent); } }