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.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.text.format.DateFormat; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ListView; import android.widget.TextView; import com.beardedhen.androidbootstrap.BootstrapButton; import org.thialfihar.android.apg.Constants; import org.thialfihar.android.apg.R; import org.thialfihar.android.apg.pgp.PgpKeyHelper; import org.thialfihar.android.apg.provider.KeychainContract; import org.thialfihar.android.apg.provider.ProviderHelper; import org.thialfihar.android.apg.ui.adapter.ViewKeyKeysAdapter; import org.thialfihar.android.apg.ui.adapter.ViewKeyUserIdsAdapter; import org.thialfihar.android.apg.util.Log; import java.util.Date; public class ViewKeyMainFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> { public static final String ARG_DATA_URI = "uri"; private TextView mName; private TextView mEmail; private TextView mComment; private TextView mAlgorithm; private TextView mKeyId; private TextView mExpiry; private TextView mCreation; private TextView mFingerprint; private TextView mSecretKey; private BootstrapButton mActionEdit; private BootstrapButton mActionEncrypt; private BootstrapButton mActionCertify; private ListView mUserIds; private ListView mKeys; private static final int LOADER_ID_KEYRING = 0; private static final int LOADER_ID_USER_IDS = 1; private static final int LOADER_ID_KEYS = 2; private ViewKeyUserIdsAdapter mUserIdsAdapter; private ViewKeyKeysAdapter mKeysAdapter; private Uri mDataUri; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.view_key_main_fragment, container, false); mName = (TextView) view.findViewById(R.id.name); mEmail = (TextView) view.findViewById(R.id.email); mComment = (TextView) view.findViewById(R.id.comment); mKeyId = (TextView) view.findViewById(R.id.key_id); mAlgorithm = (TextView) view.findViewById(R.id.algorithm); mCreation = (TextView) view.findViewById(R.id.creation); mExpiry = (TextView) view.findViewById(R.id.expiry); mFingerprint = (TextView) view.findViewById(R.id.fingerprint); mSecretKey = (TextView) view.findViewById(R.id.secret_key); mUserIds = (ListView) view.findViewById(R.id.user_ids); mKeys = (ListView) view.findViewById(R.id.keys); mActionEdit = (BootstrapButton) view.findViewById(R.id.action_edit); mActionEncrypt = (BootstrapButton) view.findViewById(R.id.action_encrypt); mActionCertify = (BootstrapButton) view.findViewById(R.id.action_certify); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); Uri dataUri = getArguments().getParcelable(ARG_DATA_URI); if (dataUri == null) { Log.e(Constants.TAG, "Data missing. Should be Uri of key!"); getActivity().finish(); return; } loadData(dataUri); } private void loadData(Uri dataUri) { if (dataUri.equals(mDataUri)) { Log.d(Constants.TAG, "Same URI, no need to load the data again!"); return; } mDataUri = dataUri; Log.i(Constants.TAG, "mDataUri: " + mDataUri.toString()); { // label whether secret key is available, and edit button if it is final long masterKeyId = ProviderHelper.getMasterKeyId(getActivity(), mDataUri); if (ProviderHelper.hasSecretKeyByMasterKeyId(getActivity(), masterKeyId)) { // set this attribute. this is a LITTLE unclean, but we have the info available // right here, so why not. mSecretKey.setTextColor(getResources().getColor(R.color.emphasis)); mSecretKey.setText(R.string.secret_key_yes); // certify button // TODO this button MIGHT be useful if the user wants to // certify a private key with another... // mActionCertify.setVisibility(View.GONE); // edit button mActionEdit.setVisibility(View.VISIBLE); mActionEdit.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { Intent editIntent = new Intent(getActivity(), EditKeyActivity.class); editIntent.setData(KeychainContract.KeyRings .buildSecretKeyRingsByMasterKeyIdUri(Long.toString(masterKeyId))); editIntent.setAction(EditKeyActivity.ACTION_EDIT_KEY); startActivityForResult(editIntent, 0); } }); } else { mSecretKey.setText(getResources().getString(R.string.secret_key_no)); // certify button mActionCertify.setVisibility(View.VISIBLE); // edit button mActionEdit.setVisibility(View.GONE); } // TODO see todo note above, doing this here for now mActionCertify.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { certifyKey(KeychainContract.KeyRings .buildPublicKeyRingsByMasterKeyIdUri(Long.toString(masterKeyId))); } }); } mActionEncrypt.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { encryptToContact(mDataUri); } }); mUserIdsAdapter = new ViewKeyUserIdsAdapter(getActivity(), null, 0); mUserIds.setAdapter(mUserIdsAdapter); mKeysAdapter = new ViewKeyKeysAdapter(getActivity(), null, 0); mKeys.setAdapter(mKeysAdapter); // Prepare the loaders. Either re-connect with an existing ones, // or start new ones. getActivity().getSupportLoaderManager().initLoader(LOADER_ID_KEYRING, null, this); getActivity().getSupportLoaderManager().initLoader(LOADER_ID_USER_IDS, null, this); getActivity().getSupportLoaderManager().initLoader(LOADER_ID_KEYS, null, this); } static final String[] KEYRING_PROJECTION = new String[] { KeychainContract.KeyRings._ID, KeychainContract.KeyRings.MASTER_KEY_ID, KeychainContract.UserIds.USER_ID, }; static final int KEYRING_INDEX_ID = 0; static final int KEYRING_INDEX_MASTER_KEY_ID = 1; static final int KEYRING_INDEX_USER_ID = 2; static final String[] USER_IDS_PROJECTION = new String[] { KeychainContract.UserIds._ID, KeychainContract.UserIds.USER_ID, KeychainContract.UserIds.RANK, }; // not the main user id static final String USER_IDS_SELECTION = KeychainContract.UserIds.RANK + " > 0 "; static final String USER_IDS_SORT_ORDER = KeychainContract.UserIds.USER_ID + " COLLATE LOCALIZED ASC"; static final String[] KEYS_PROJECTION = new String[] { KeychainContract.Keys._ID, KeychainContract.Keys.KEY_ID, KeychainContract.Keys.IS_MASTER_KEY, KeychainContract.Keys.ALGORITHM, KeychainContract.Keys.KEY_SIZE, KeychainContract.Keys.CAN_CERTIFY, KeychainContract.Keys.CAN_SIGN, KeychainContract.Keys.CAN_ENCRYPT, KeychainContract.Keys.IS_REVOKED, KeychainContract.Keys.CREATION, KeychainContract.Keys.EXPIRY, KeychainContract.Keys.FINGERPRINT, }; static final String KEYS_SORT_ORDER = KeychainContract.Keys.RANK + " ASC"; static final int KEYS_INDEX_ID = 0; static final int KEYS_INDEX_KEY_ID = 1; static final int KEYS_INDEX_IS_MASTER_KEY = 2; static final int KEYS_INDEX_ALGORITHM = 3; static final int KEYS_INDEX_KEY_SIZE = 4; static final int KEYS_INDEX_CAN_CERTIFY = 5; static final int KEYS_INDEX_CAN_SIGN = 6; static final int KEYS_INDEX_CAN_ENCRYPT = 7; static final int KEYS_INDEX_IS_REVOKED = 8; static final int KEYS_INDEX_CREATION = 9; static final int KEYS_INDEX_EXPIRY = 10; static final int KEYS_INDEX_FINGERPRINT = 11; public Loader<Cursor> onCreateLoader(int id, Bundle args) { switch (id) { case LOADER_ID_KEYRING: { Uri baseUri = mDataUri; // Now create and return a CursorLoader that will take care of // creating a Cursor for the data being displayed. return new CursorLoader(getActivity(), baseUri, KEYRING_PROJECTION, null, null, null); } case LOADER_ID_USER_IDS: { Uri baseUri = KeychainContract.UserIds.buildUserIdsUri(mDataUri); // Now create and return a CursorLoader that will take care of // creating a Cursor for the data being displayed. return new CursorLoader(getActivity(), baseUri, USER_IDS_PROJECTION, null, null, USER_IDS_SORT_ORDER); } case LOADER_ID_KEYS: { Uri baseUri = KeychainContract.Keys.buildKeysUri(mDataUri); // Now create and return a CursorLoader that will take care of // creating a Cursor for the data being displayed. return new CursorLoader(getActivity(), baseUri, KEYS_PROJECTION, null, null, KEYS_SORT_ORDER); } default: return null; } } public void onLoadFinished(Loader<Cursor> loader, Cursor data) { // Swap the new cursor in. (The framework will take care of closing the // old cursor once we return.) switch (loader.getId()) { case LOADER_ID_KEYRING: if (data.moveToFirst()) { // get name, email, and comment from USER_ID String[] mainUserId = PgpKeyHelper.splitUserId(data.getString(KEYRING_INDEX_USER_ID)); if (mainUserId[0] != null) { getActivity().setTitle(mainUserId[0]); mName.setText(mainUserId[0]); } else { getActivity().setTitle(R.string.user_id_no_name); mName.setText(R.string.user_id_no_name); } mEmail.setText(mainUserId[1]); mComment.setText(mainUserId[2]); } break; case LOADER_ID_USER_IDS: mUserIdsAdapter.swapCursor(data); break; case LOADER_ID_KEYS: // the first key here is our master key if (data.moveToFirst()) { // get key id from MASTER_KEY_ID long keyId = data.getLong(KEYS_INDEX_KEY_ID); String keyIdStr = PgpKeyHelper.convertKeyIdToHex(keyId); mKeyId.setText(keyIdStr); // get creation date from CREATION if (data.isNull(KEYS_INDEX_CREATION)) { mCreation.setText(R.string.none); } else { Date creationDate = new Date(data.getLong(KEYS_INDEX_CREATION) * 1000); mCreation.setText( DateFormat.getDateFormat(getActivity().getApplicationContext()).format(creationDate)); } // get expiry date from EXPIRY if (data.isNull(KEYS_INDEX_EXPIRY)) { mExpiry.setText(R.string.none); } else { Date expiryDate = new Date(data.getLong(KEYS_INDEX_EXPIRY) * 1000); mExpiry.setText( DateFormat.getDateFormat(getActivity().getApplicationContext()).format(expiryDate)); } String algorithmStr = PgpKeyHelper.getAlgorithmInfo(data.getInt(KEYS_INDEX_ALGORITHM), data.getInt(KEYS_INDEX_KEY_SIZE)); mAlgorithm.setText(algorithmStr); byte[] fingerprintBlob = data.getBlob(KEYS_INDEX_FINGERPRINT); if (fingerprintBlob == null) { // FALLBACK for old database entries fingerprintBlob = ProviderHelper.getFingerprint(getActivity(), mDataUri); } String fingerprint = PgpKeyHelper.convertFingerprintToHex(fingerprintBlob); mFingerprint.setText(PgpKeyHelper.colorizeFingerprint(fingerprint)); } mKeysAdapter.swapCursor(data); break; default: break; } } /** * This is called when the last Cursor provided to onLoadFinished() above is about to be closed. * We need to make sure we are no longer using it. */ public void onLoaderReset(Loader<Cursor> loader) { switch (loader.getId()) { case LOADER_ID_KEYRING: // No resources need to be freed for this ID break; case LOADER_ID_USER_IDS: mUserIdsAdapter.swapCursor(null); break; case LOADER_ID_KEYS: mKeysAdapter.swapCursor(null); break; default: break; } } private void encryptToContact(Uri dataUri) { long keyId = ProviderHelper.getMasterKeyId(getActivity(), dataUri); long[] encryptionKeyIds = new long[] { keyId }; Intent intent = new Intent(getActivity(), EncryptActivity.class); intent.setAction(EncryptActivity.ACTION_ENCRYPT); intent.putExtra(EncryptActivity.EXTRA_ENCRYPTION_KEY_IDS, encryptionKeyIds); // used instead of startActivity set actionbar based on callingPackage startActivityForResult(intent, 0); } private void certifyKey(Uri dataUri) { Intent signIntent = new Intent(getActivity(), CertifyKeyActivity.class); signIntent.setData(dataUri); startActivity(signIntent); } }