Java tutorial
/* * Copyright (C) 2014-2015 Dominik Schrmann <dominik@dominikschuermann.de> * Copyright (C) 2015 Vincent Breitmoser <v.breitmoser@mugenguild.com> * * 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.animation.ObjectAnimator; import android.app.Activity; import android.content.Context; import android.database.Cursor; import android.net.Uri; import android.os.Build; import android.os.Build.VERSION_CODES; import android.support.v4.content.CursorLoader; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.linked.LinkedAttribute; import org.sufficientlysecure.keychain.linked.UriAttribute; import org.sufficientlysecure.keychain.provider.KeychainContract.Certs; import org.sufficientlysecure.keychain.provider.KeychainContract.UserPackets; import org.sufficientlysecure.keychain.ui.linked.LinkedIdViewFragment; import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils; import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils.State; import org.sufficientlysecure.keychain.ui.util.SubtleAttentionSeeker; import org.sufficientlysecure.keychain.util.FilterCursorWrapper; import org.sufficientlysecure.keychain.util.Log; import java.io.IOException; import java.util.WeakHashMap; public class LinkedIdsAdapter extends UserAttributesAdapter { private final boolean mIsSecret; protected LayoutInflater mInflater; WeakHashMap<Integer, UriAttribute> mLinkedIdentityCache = new WeakHashMap<>(); private Cursor mUnfilteredCursor; private TextView mExpander; public LinkedIdsAdapter(Context context, Cursor c, int flags, boolean isSecret, TextView expander) { super(context, c, flags); mInflater = LayoutInflater.from(context); mIsSecret = isSecret; if (expander != null) { expander.setVisibility(View.GONE); /* don't show an expander (maybe in some sort of advanced view?) mExpander = expander; mExpander.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { showUnfiltered(); } }); */ } } @Override public Cursor swapCursor(Cursor cursor) { if (cursor == null) { mUnfilteredCursor = null; return super.swapCursor(null); } mUnfilteredCursor = cursor; FilterCursorWrapper filteredCursor = new FilterCursorWrapper(cursor) { @Override public boolean isVisible(Cursor cursor) { UriAttribute id = getItemAtPosition(cursor); return id instanceof LinkedAttribute; } }; if (mExpander != null) { int hidden = filteredCursor.getHiddenCount(); if (hidden == 0) { mExpander.setVisibility(View.GONE); } else { mExpander.setVisibility(View.VISIBLE); mExpander.setText(mContext.getResources().getQuantityString(R.plurals.linked_id_expand, hidden)); } } return super.swapCursor(filteredCursor); } private void showUnfiltered() { mExpander.setVisibility(View.GONE); super.swapCursor(mUnfilteredCursor); } @Override public void bindView(View view, Context context, Cursor cursor) { ViewHolder holder = (ViewHolder) view.getTag(); if (!mIsSecret) { int isVerified = cursor.getInt(INDEX_VERIFIED); switch (isVerified) { case Certs.VERIFIED_SECRET: KeyFormattingUtils.setStatusImage(mContext, holder.vVerified, null, State.VERIFIED, KeyFormattingUtils.DEFAULT_COLOR); break; case Certs.VERIFIED_SELF: KeyFormattingUtils.setStatusImage(mContext, holder.vVerified, null, State.UNVERIFIED, KeyFormattingUtils.DEFAULT_COLOR); break; default: KeyFormattingUtils.setStatusImage(mContext, holder.vVerified, null, State.INVALID, KeyFormattingUtils.DEFAULT_COLOR); break; } } UriAttribute id = getItemAtPosition(cursor); holder.setData(mContext, id); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { view.setTransitionName(id.mUri.toString()); } } public UriAttribute getItemAtPosition(Cursor cursor) { int rank = cursor.getInt(INDEX_RANK); Log.d(Constants.TAG, "requested rank: " + rank); UriAttribute ret = mLinkedIdentityCache.get(rank); if (ret != null) { Log.d(Constants.TAG, "cached!"); return ret; } Log.d(Constants.TAG, "not cached!"); try { byte[] data = cursor.getBlob(INDEX_ATTRIBUTE_DATA); ret = LinkedAttribute.fromAttributeData(data); mLinkedIdentityCache.put(rank, ret); return ret; } catch (IOException e) { Log.e(Constants.TAG, "could not read linked identity subpacket data", e); return null; } } @Override public UriAttribute getItem(int position) { Cursor cursor = getCursor(); cursor.moveToPosition(position); return getItemAtPosition(cursor); } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { View v = mInflater.inflate(R.layout.linked_id_item, null); ViewHolder holder = new ViewHolder(v); v.setTag(holder); return v; } // don't show revoked user ids, irrelevant for average users public static final String LINKED_IDS_WHERE = UserPackets.IS_REVOKED + " = 0"; public static CursorLoader createLoader(Activity activity, Uri dataUri) { Uri baseUri = UserPackets.buildLinkedIdsUri(dataUri); return new CursorLoader(activity, baseUri, UserIdsAdapter.USER_PACKETS_PROJECTION, LINKED_IDS_WHERE, null, null); } public LinkedIdViewFragment getLinkedIdFragment(Uri baseUri, int position, byte[] fingerprint) throws IOException { Cursor c = getCursor(); c.moveToPosition(position); int rank = c.getInt(UserIdsAdapter.INDEX_RANK); Uri dataUri = UserPackets.buildLinkedIdsUri(baseUri); return LinkedIdViewFragment.newInstance(dataUri, rank, mIsSecret, fingerprint); } public static class ViewHolder { final public ImageView vVerified; final public ImageView vIcon; final public TextView vTitle; final public TextView vComment; public ViewHolder(View view) { vVerified = (ImageView) view.findViewById(R.id.linked_id_certified_icon); vIcon = (ImageView) view.findViewById(R.id.linked_id_type_icon); vTitle = (TextView) view.findViewById(R.id.linked_id_title); vComment = (TextView) view.findViewById(R.id.linked_id_comment); } public void setData(Context context, UriAttribute id) { vTitle.setText(id.getDisplayTitle(context)); String comment = id.getDisplayComment(context); if (comment != null) { vComment.setVisibility(View.VISIBLE); vComment.setText(comment); } else { vComment.setVisibility(View.GONE); } vIcon.setImageResource(id.getDisplayIcon()); } public void seekAttention() { if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) { ObjectAnimator anim = SubtleAttentionSeeker.tintText(vComment, 1000); anim.setStartDelay(200); anim.start(); } } } }