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.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ListView; import com.devspark.appmsg.AppMsg; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException; import org.sufficientlysecure.keychain.provider.KeychainContract; import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings; import org.sufficientlysecure.keychain.provider.KeychainContract.UserIds; import org.sufficientlysecure.keychain.provider.ProviderHelper; import org.sufficientlysecure.keychain.ui.adapter.ViewKeyUserIdsAdapter; import org.sufficientlysecure.keychain.util.Log; import java.util.Date; public class ViewKeyMainFragment extends LoaderFragment implements LoaderManager.LoaderCallbacks<Cursor> { public static final String ARG_DATA_URI = "uri"; private View mActionEdit; private View mActionEditDivider; private View mActionEncrypt; private View mActionCertify; private View mActionCertifyDivider; private ListView mUserIds; private static final int LOADER_ID_UNIFIED = 0; private static final int LOADER_ID_USER_IDS = 1; // conservative attitude private boolean mHasEncrypt = true; private ViewKeyUserIdsAdapter mUserIdsAdapter; private Uri mDataUri; @Override public View onCreateView(LayoutInflater inflater, ViewGroup superContainer, Bundle savedInstanceState) { View root = super.onCreateView(inflater, superContainer, savedInstanceState); View view = inflater.inflate(R.layout.view_key_main_fragment, getContainer()); mUserIds = (ListView) view.findViewById(R.id.view_key_user_ids); mActionEdit = view.findViewById(R.id.view_key_action_edit); mActionEditDivider = view.findViewById(R.id.view_key_action_edit_divider); mActionEncrypt = view.findViewById(R.id.view_key_action_encrypt); mActionCertify = view.findViewById(R.id.view_key_action_certify); mActionCertifyDivider = view.findViewById(R.id.view_key_action_certify_divider); return root; } @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) { mDataUri = dataUri; Log.i(Constants.TAG, "mDataUri: " + mDataUri.toString()); mActionEncrypt.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { encrypt(mDataUri); } }); mActionCertify.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { certify(mDataUri); } }); mActionEdit.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { editKey(mDataUri); } }); mUserIdsAdapter = new ViewKeyUserIdsAdapter(getActivity(), null, 0); mUserIds.setAdapter(mUserIdsAdapter); // Prepare the loaders. Either re-connect with an existing ones, // or start new ones. getLoaderManager().initLoader(LOADER_ID_UNIFIED, null, this); getLoaderManager().initLoader(LOADER_ID_USER_IDS, null, this); } static final String[] UNIFIED_PROJECTION = new String[] { KeyRings._ID, KeyRings.MASTER_KEY_ID, KeyRings.HAS_ANY_SECRET, KeyRings.IS_REVOKED, KeyRings.EXPIRY, KeyRings.HAS_ENCRYPT }; static final int INDEX_UNIFIED_MASTER_KEY_ID = 1; static final int INDEX_UNIFIED_HAS_ANY_SECRET = 2; static final int INDEX_UNIFIED_IS_REVOKED = 3; static final int INDEX_UNIFIED_EXPIRY = 4; static final int INDEX_UNIFIED_HAS_ENCRYPT = 5; public Loader<Cursor> onCreateLoader(int id, Bundle args) { setContentShown(false); switch (id) { case LOADER_ID_UNIFIED: { Uri baseUri = KeyRings.buildUnifiedKeyRingUri(mDataUri); return new CursorLoader(getActivity(), baseUri, UNIFIED_PROJECTION, null, null, null); } case LOADER_ID_USER_IDS: { Uri baseUri = UserIds.buildUserIdsUri(mDataUri); return new CursorLoader(getActivity(), baseUri, ViewKeyUserIdsAdapter.USER_IDS_PROJECTION, null, null, null); } default: return null; } } public void onLoadFinished(Loader<Cursor> loader, Cursor data) { /* TODO better error handling? May cause problems when a key is deleted, * because the notification triggers faster than the activity closes. */ // Avoid NullPointerExceptions... if (data.getCount() == 0) { return; } // Swap the new cursor in. (The framework will take care of closing the // old cursor once we return.) switch (loader.getId()) { case LOADER_ID_UNIFIED: { if (data.moveToFirst()) { if (data.getInt(INDEX_UNIFIED_HAS_ANY_SECRET) != 0) { // certify button mActionCertify.setVisibility(View.GONE); mActionCertifyDivider.setVisibility(View.GONE); // edit button mActionEdit.setVisibility(View.VISIBLE); mActionEditDivider.setVisibility(View.VISIBLE); } else { // certify button mActionCertify.setVisibility(View.VISIBLE); mActionCertifyDivider.setVisibility(View.VISIBLE); // edit button mActionEdit.setVisibility(View.GONE); mActionEditDivider.setVisibility(View.GONE); } // If this key is revoked, it cannot be used for anything! if (data.getInt(INDEX_UNIFIED_IS_REVOKED) != 0) { mActionEdit.setEnabled(false); mActionCertify.setEnabled(false); mActionEncrypt.setEnabled(false); } else { mActionEdit.setEnabled(true); Date expiryDate = new Date(data.getLong(INDEX_UNIFIED_EXPIRY) * 1000); if (!data.isNull(INDEX_UNIFIED_EXPIRY) && expiryDate.before(new Date())) { mActionCertify.setEnabled(false); mActionEncrypt.setEnabled(false); } else { mActionCertify.setEnabled(true); mActionEncrypt.setEnabled(true); } } mHasEncrypt = data.getInt(INDEX_UNIFIED_HAS_ENCRYPT) != 0; break; } } case LOADER_ID_USER_IDS: mUserIdsAdapter.swapCursor(data); break; } setContentShown(true); } /** * 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_USER_IDS: mUserIdsAdapter.swapCursor(null); break; } } private void encrypt(Uri dataUri) { // If there is no encryption key, don't bother. if (!mHasEncrypt) { AppMsg.makeText(getActivity(), R.string.error_no_encrypt_subkey, AppMsg.STYLE_ALERT).show(); return; } try { long keyId = new ProviderHelper(getActivity()).getCachedPublicKeyRing(dataUri) .extractOrGetMasterKeyId(); 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); } catch (PgpGeneralException e) { Log.e(Constants.TAG, "key not found!", e); } } private void certify(Uri dataUri) { Intent signIntent = new Intent(getActivity(), CertifyKeyActivity.class); signIntent.setData(dataUri); startActivity(signIntent); } private void editKey(Uri dataUri) { Intent editIntent = new Intent(getActivity(), EditKeyActivity.class); editIntent.setData(KeychainContract.KeyRingData.buildSecretKeyRingUri(dataUri)); editIntent.setAction(EditKeyActivity.ACTION_EDIT_KEY); startActivityForResult(editIntent, 0); } }