Java tutorial
/* * Copyright (C) 2012-2014 Dominik Schrmann <dominik@dominikschuermann.de> * Copyright (C) 2010-2014 Thialfihar <thi@thialfihar.org> * * 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.remote.ui; import android.content.Context; import android.database.Cursor; import android.database.DatabaseUtils; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.LoaderManager; import android.support.v4.content.ContextCompat; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.text.Editable; import android.text.TextUtils; import android.text.TextWatcher; import android.view.Gravity; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; import android.widget.FrameLayout; import android.widget.LinearLayout; import android.widget.ProgressBar; import android.widget.TextView; import org.openintents.openpgp.util.OpenPgpUtils; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings; import org.sufficientlysecure.keychain.provider.KeychainDatabase.Tables; import org.sufficientlysecure.keychain.remote.ui.adapter.SelectEncryptKeyAdapter; import org.sufficientlysecure.keychain.ui.util.FormattingUtils; import org.sufficientlysecure.keychain.ui.base.RecyclerFragment; public class SelectPublicKeyFragment extends RecyclerFragment<SelectEncryptKeyAdapter> implements TextWatcher, LoaderManager.LoaderCallbacks<Cursor> { public static final String ARG_PRESELECTED_KEY_IDS = "preselected_key_ids"; private EditText mSearchView; private long mSelectedMasterKeyIds[]; private String mQuery; /** * Creates new instance of this fragment */ public static SelectPublicKeyFragment newInstance(long[] preselectedKeyIds) { SelectPublicKeyFragment frag = new SelectPublicKeyFragment(); Bundle args = new Bundle(); args.putLongArray(ARG_PRESELECTED_KEY_IDS, preselectedKeyIds); frag.setArguments(args); return frag; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mSelectedMasterKeyIds = getArguments().getLongArray(ARG_PRESELECTED_KEY_IDS); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { final Context context = getContext(); FrameLayout root = new FrameLayout(context); LinearLayout progressContainer = new LinearLayout(context); progressContainer.setId(INTERNAL_PROGRESS_CONTAINER_ID); progressContainer.setOrientation(LinearLayout.VERTICAL); progressContainer.setGravity(Gravity.CENTER); progressContainer.setVisibility(View.GONE); ProgressBar progressBar = new ProgressBar(context, null, android.R.attr.progressBarStyleLarge); progressContainer.addView(progressBar, new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)); root.addView(progressContainer, new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); FrameLayout listContainer = new FrameLayout(context); listContainer.setId(INTERNAL_LIST_CONTAINER_ID); TextView textView = new TextView(context); textView.setId(INTERNAL_EMPTY_VIEW_ID); textView.setGravity(Gravity.CENTER); listContainer.addView(textView, new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)); LinearLayout innerListContainer = new LinearLayout(context); innerListContainer.setOrientation(LinearLayout.VERTICAL); mSearchView = new EditText(context); mSearchView.setId(android.R.id.input); mSearchView.setHint(R.string.menu_search); mSearchView.setCompoundDrawablesWithIntrinsicBounds( ContextCompat.getDrawable(context, R.drawable.ic_search_grey_24dp), null, null, null); innerListContainer.addView(mSearchView, new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)); RecyclerView listView = new RecyclerView(context); listView.setId(INTERNAL_LIST_VIEW_ID); int padding = FormattingUtils.dpToPx(context, 8); listView.setPadding(padding, 0, padding, 0); listView.setClipToPadding(false); innerListContainer.addView(listView, new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); listContainer.addView(innerListContainer, new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); root.addView(listContainer, new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); root.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); return root; } /** * Define Adapter and Loader on create of Activity */ @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // Give some text to display if there is no data. In a real // application this would come from a resource. setEmptyText(getString(R.string.list_empty)); mSearchView.addTextChangedListener(this); setAdapter(new SelectEncryptKeyAdapter(getContext(), null)); setLayoutManager(new LinearLayoutManager(getContext())); // Start out with a progress indicator. hideList(false); // Prepare the loader. Either re-connect with an existing one, // or start a new one. getLoaderManager().initLoader(0, null, this); } public long[] getSelectedMasterKeyIds() { return getAdapter() != null ? getAdapter().getMasterKeyIds() : new long[0]; } public String[] getSelectedRawUserIds() { return getAdapter() != null ? getAdapter().getRawUserIds() : new String[0]; } public OpenPgpUtils.UserId[] getSelectedUserIds() { return getAdapter() != null ? getAdapter().getUserIds() : new OpenPgpUtils.UserId[0]; } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { Uri baseUri = KeyRings.buildUnifiedKeyRingsUri(); // These are the rows that we will retrieve. String[] projection = new String[] { KeyRings._ID, KeyRings.MASTER_KEY_ID, KeyRings.USER_ID, KeyRings.IS_EXPIRED, KeyRings.IS_REVOKED, KeyRings.HAS_ENCRYPT, KeyRings.VERIFIED, KeyRings.HAS_DUPLICATE_USER_ID, KeyRings.CREATION, }; String inMasterKeyList = null; if (mSelectedMasterKeyIds != null && mSelectedMasterKeyIds.length > 0) { inMasterKeyList = Tables.KEYS + "." + KeyRings.MASTER_KEY_ID + " IN ("; for (int i = 0; i < mSelectedMasterKeyIds.length; ++i) { if (i != 0) { inMasterKeyList += ", "; } inMasterKeyList += DatabaseUtils.sqlEscapeString("" + mSelectedMasterKeyIds[i]); } inMasterKeyList += ")"; } String orderBy = KeyRings.USER_ID + " ASC"; if (inMasterKeyList != null) { // sort by selected master keys orderBy = inMasterKeyList + " DESC, " + orderBy; } String where = null; String whereArgs[] = null; if (mQuery != null) { String[] words = mQuery.trim().split("\\s+"); whereArgs = new String[words.length]; for (int i = 0; i < words.length; ++i) { if (where == null) { where = ""; } else { where += " AND "; } where += KeyRings.USER_ID + " LIKE ?"; whereArgs[i] = "%" + words[i] + "%"; } } // Now create and return a CursorLoader that will take care of // creating a Cursor for the data being displayed. return new CursorLoader(getActivity(), baseUri, projection, where, whereArgs, orderBy); } @Override 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.) getAdapter().setQuery(mQuery); getAdapter().swapCursor(SelectEncryptKeyAdapter.PublicKeyCursor.wrap(data)); // The list should now be shown. if (isResumed()) { showList(true); } else { showList(false); } // preselect given master keys getAdapter().preselectMasterKeyIds(mSelectedMasterKeyIds); } @Override public void onLoaderReset(Loader<Cursor> loader) { // 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. getAdapter().swapCursor(null); } @Override public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) { } @Override public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) { } @Override public void afterTextChanged(Editable editable) { mQuery = !TextUtils.isEmpty(editable.toString()) ? editable.toString() : null; getLoaderManager().restartLoader(0, null, this); } }