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.adapter; import android.content.Context; import android.content.res.ColorStateList; import android.database.Cursor; import android.support.v4.widget.CursorAdapter; import android.text.format.DateFormat; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.helper.OtherHelper; import org.sufficientlysecure.keychain.pgp.PgpKeyHelper; import org.sufficientlysecure.keychain.provider.KeychainContract.Keys; import java.util.Date; public class ViewKeyKeysAdapter extends CursorAdapter { private LayoutInflater mInflater; private int mIndexKeyId; private int mIndexAlgorithm; private int mIndexKeySize; private int mIndexRank; private int mIndexCanCertify; private int mIndexCanEncrypt; private int mIndexCanSign; private int mIndexHasSecret; private int mIndexRevokedKey; private int mIndexExpiry; private boolean hasAnySecret; private ColorStateList mDefaultTextColor; public ViewKeyKeysAdapter(Context context, Cursor c, int flags) { super(context, c, flags); mInflater = LayoutInflater.from(context); initIndex(c); } @Override public Cursor swapCursor(Cursor newCursor) { initIndex(newCursor); hasAnySecret = false; if (newCursor != null) { newCursor.moveToFirst(); do { if (newCursor.getInt(mIndexHasSecret) != 0) { hasAnySecret = true; break; } } while (newCursor.moveToNext()); } return super.swapCursor(newCursor); } /** * Get column indexes for performance reasons just once in constructor and swapCursor. For a * performance comparison see http://stackoverflow.com/a/17999582 * * @param cursor */ private void initIndex(Cursor cursor) { if (cursor != null) { mIndexKeyId = cursor.getColumnIndexOrThrow(Keys.KEY_ID); mIndexAlgorithm = cursor.getColumnIndexOrThrow(Keys.ALGORITHM); mIndexKeySize = cursor.getColumnIndexOrThrow(Keys.KEY_SIZE); mIndexRank = cursor.getColumnIndexOrThrow(Keys.RANK); mIndexCanCertify = cursor.getColumnIndexOrThrow(Keys.CAN_CERTIFY); mIndexCanEncrypt = cursor.getColumnIndexOrThrow(Keys.CAN_ENCRYPT); mIndexCanSign = cursor.getColumnIndexOrThrow(Keys.CAN_SIGN); mIndexHasSecret = cursor.getColumnIndexOrThrow(Keys.HAS_SECRET); mIndexRevokedKey = cursor.getColumnIndexOrThrow(Keys.IS_REVOKED); mIndexExpiry = cursor.getColumnIndexOrThrow(Keys.EXPIRY); } } @Override public void bindView(View view, Context context, Cursor cursor) { TextView keyId = (TextView) view.findViewById(R.id.keyId); TextView keyDetails = (TextView) view.findViewById(R.id.keyDetails); TextView keyExpiry = (TextView) view.findViewById(R.id.keyExpiry); ImageView masterKeyIcon = (ImageView) view.findViewById(R.id.ic_masterKey); ImageView certifyIcon = (ImageView) view.findViewById(R.id.ic_certifyKey); ImageView encryptIcon = (ImageView) view.findViewById(R.id.ic_encryptKey); ImageView signIcon = (ImageView) view.findViewById(R.id.ic_signKey); ImageView revokedKeyIcon = (ImageView) view.findViewById(R.id.ic_revokedKey); String keyIdStr = PgpKeyHelper.convertKeyIdToHex(cursor.getLong(mIndexKeyId)); String algorithmStr = PgpKeyHelper.getAlgorithmInfo(context, cursor.getInt(mIndexAlgorithm), cursor.getInt(mIndexKeySize)); keyId.setText(keyIdStr); // may be set with additional "stripped" later on if (hasAnySecret && cursor.getInt(mIndexHasSecret) == 0) { keyDetails.setText(algorithmStr + ", " + context.getString(R.string.key_stripped)); } else { keyDetails.setText(algorithmStr); } // Set icons according to properties masterKeyIcon.setVisibility(cursor.getInt(mIndexRank) == 0 ? View.VISIBLE : View.INVISIBLE); certifyIcon.setVisibility(cursor.getInt(mIndexCanCertify) != 0 ? View.VISIBLE : View.GONE); encryptIcon.setVisibility(cursor.getInt(mIndexCanEncrypt) != 0 ? View.VISIBLE : View.GONE); signIcon.setVisibility(cursor.getInt(mIndexCanSign) != 0 ? View.VISIBLE : View.GONE); boolean valid = true; if (cursor.getInt(mIndexRevokedKey) > 0) { revokedKeyIcon.setVisibility(View.VISIBLE); valid = false; } else { keyId.setTextColor(mDefaultTextColor); keyDetails.setTextColor(mDefaultTextColor); keyExpiry.setTextColor(mDefaultTextColor); revokedKeyIcon.setVisibility(View.GONE); } if (!cursor.isNull(mIndexExpiry)) { Date expiryDate = new Date(cursor.getLong(mIndexExpiry) * 1000); valid = valid && expiryDate.after(new Date()); keyExpiry.setText(context.getString(R.string.label_expiry) + ": " + DateFormat.getDateFormat(context).format(expiryDate)); } else { keyExpiry.setText(context.getString(R.string.label_expiry) + ": " + context.getString(R.string.none)); } // if key is expired or revoked, strike through text if (!valid) { keyId.setText(OtherHelper.strikeOutText(keyId.getText())); keyDetails.setText(OtherHelper.strikeOutText(keyDetails.getText())); keyExpiry.setText(OtherHelper.strikeOutText(keyExpiry.getText())); } keyId.setEnabled(valid); keyDetails.setEnabled(valid); keyExpiry.setEnabled(valid); } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { View view = mInflater.inflate(R.layout.view_key_keys_item, null); if (mDefaultTextColor == null) { TextView keyId = (TextView) view.findViewById(R.id.keyId); mDefaultTextColor = keyId.getTextColors(); } return view; } // Disable selection of items, http://stackoverflow.com/a/4075045 @Override public boolean areAllItemsEnabled() { return false; } // Disable selection of items, http://stackoverflow.com/a/4075045 @Override public boolean isEnabled(int position) { return false; } }