Java tutorial
/* Copyright 2017 Andrew Dawson * * This file is a part of Tusky. * * 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. * * Tusky 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 Tusky; if not, * see <http://www.gnu.org/licenses>. */ package com.keylesspalace.tusky.adapter; import android.content.Context; import android.graphics.Color; import android.graphics.PorterDuff; import android.graphics.Typeface; import android.graphics.drawable.Drawable; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.v4.content.ContextCompat; import android.support.v4.text.BidiFormatter; import android.support.v7.widget.RecyclerView; import android.text.SpannableStringBuilder; import android.text.Spanned; import android.text.TextUtils; import android.text.style.StyleSpan; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.CompoundButton; import android.widget.ImageView; import android.widget.TextView; import android.widget.ToggleButton; import com.keylesspalace.tusky.R; import com.keylesspalace.tusky.entity.Account; import com.keylesspalace.tusky.entity.Emoji; import com.keylesspalace.tusky.entity.Notification; import com.keylesspalace.tusky.interfaces.LinkListener; import com.keylesspalace.tusky.interfaces.StatusActionListener; import com.keylesspalace.tusky.util.CustomEmojiHelper; import com.keylesspalace.tusky.util.DateUtils; import com.keylesspalace.tusky.util.LinkHelper; import com.keylesspalace.tusky.viewdata.NotificationViewData; import com.keylesspalace.tusky.viewdata.StatusViewData; import com.squareup.picasso.Picasso; import java.util.ArrayList; import java.util.Date; import java.util.List; public class NotificationsAdapter extends RecyclerView.Adapter { private static final int VIEW_TYPE_MENTION = 0; private static final int VIEW_TYPE_FOOTER = 1; private static final int VIEW_TYPE_STATUS_NOTIFICATION = 2; private static final int VIEW_TYPE_FOLLOW = 3; private static final int VIEW_TYPE_PLACEHOLDER = 4; private List<NotificationViewData> notifications; private StatusActionListener statusListener; private NotificationActionListener notificationActionListener; private FooterViewHolder.State footerState; private boolean mediaPreviewEnabled; private BidiFormatter bidiFormatter; public NotificationsAdapter(StatusActionListener statusListener, NotificationActionListener notificationActionListener) { super(); notifications = new ArrayList<>(); this.statusListener = statusListener; this.notificationActionListener = notificationActionListener; footerState = FooterViewHolder.State.END; mediaPreviewEnabled = true; bidiFormatter = BidiFormatter.getInstance(); } @NonNull @Override public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { switch (viewType) { default: case VIEW_TYPE_MENTION: { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_status, parent, false); return new StatusViewHolder(view); } case VIEW_TYPE_FOOTER: { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_footer, parent, false); return new FooterViewHolder(view); } case VIEW_TYPE_STATUS_NOTIFICATION: { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_status_notification, parent, false); return new StatusNotificationViewHolder(view); } case VIEW_TYPE_FOLLOW: { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_follow, parent, false); return new FollowViewHolder(view); } case VIEW_TYPE_PLACEHOLDER: { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_status_placeholder, parent, false); return new PlaceholderViewHolder(view); } } } @Override public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int position) { if (position < notifications.size()) { NotificationViewData notification = notifications.get(position); if (notification instanceof NotificationViewData.Placeholder) { NotificationViewData.Placeholder placeholder = ((NotificationViewData.Placeholder) notification); PlaceholderViewHolder holder = (PlaceholderViewHolder) viewHolder; holder.setup(!placeholder.isLoading(), statusListener); return; } NotificationViewData.Concrete concreteNotificaton = (NotificationViewData.Concrete) notification; Notification.Type type = concreteNotificaton.getType(); switch (type) { case MENTION: { StatusViewHolder holder = (StatusViewHolder) viewHolder; StatusViewData.Concrete status = concreteNotificaton.getStatusViewData(); holder.setupWithStatus(status, statusListener, mediaPreviewEnabled); break; } case FAVOURITE: case REBLOG: { StatusNotificationViewHolder holder = (StatusNotificationViewHolder) viewHolder; StatusViewData.Concrete statusViewData = concreteNotificaton.getStatusViewData(); if (statusViewData == null) { holder.showNotificationContent(false); } else { holder.showNotificationContent(true); holder.setDisplayName(statusViewData.getUserFullName(), statusViewData.getAccountEmojis()); holder.setUsername(statusViewData.getNickname()); holder.setCreatedAt(statusViewData.getCreatedAt()); holder.setAvatars(concreteNotificaton.getStatusViewData().getAvatar(), concreteNotificaton.getAccount().getAvatar()); } holder.setMessage(concreteNotificaton, statusListener, bidiFormatter); holder.setupButtons(notificationActionListener, concreteNotificaton.getAccount().getId(), concreteNotificaton.getId()); break; } case FOLLOW: { FollowViewHolder holder = (FollowViewHolder) viewHolder; holder.setMessage(concreteNotificaton.getAccount(), bidiFormatter); holder.setupButtons(notificationActionListener, concreteNotificaton.getAccount().getId()); break; } } } else { FooterViewHolder holder = (FooterViewHolder) viewHolder; holder.setState(footerState); } } @Override public int getItemCount() { return notifications.size() + 1; } @Override public int getItemViewType(int position) { if (position == notifications.size()) { return VIEW_TYPE_FOOTER; } else { NotificationViewData notification = notifications.get(position); if (notification instanceof NotificationViewData.Concrete) { NotificationViewData.Concrete concrete = ((NotificationViewData.Concrete) notification); switch (concrete.getType()) { default: case MENTION: { return VIEW_TYPE_MENTION; } case FAVOURITE: case REBLOG: { return VIEW_TYPE_STATUS_NOTIFICATION; } case FOLLOW: { return VIEW_TYPE_FOLLOW; } } } else if (notification instanceof NotificationViewData.Placeholder) { return VIEW_TYPE_PLACEHOLDER; } else { throw new AssertionError("Unknown notification type"); } } } public void update(@Nullable List<NotificationViewData> newNotifications) { if (newNotifications == null || newNotifications.isEmpty()) { return; } notifications.clear(); notifications.addAll(newNotifications); notifyDataSetChanged(); } public void updateItemWithNotify(int position, NotificationViewData notification, boolean notifyAdapter) { notifications.set(position, notification); if (notifyAdapter) notifyItemChanged(position); } public void addItems(List<NotificationViewData> newNotifications) { notifications.addAll(newNotifications); notifyItemRangeInserted(notifications.size(), newNotifications.size()); } public void clear() { notifications.clear(); notifyDataSetChanged(); } public void setFooterState(FooterViewHolder.State newFooterState) { FooterViewHolder.State oldValue = footerState; footerState = newFooterState; if (footerState != oldValue) { notifyItemChanged(notifications.size()); } } public void setMediaPreviewEnabled(boolean enabled) { mediaPreviewEnabled = enabled; } public interface NotificationActionListener { void onViewAccount(String id); void onViewStatusForNotificationId(String notificationId); void onExpandedChange(boolean expanded, int position); } private static class FollowViewHolder extends RecyclerView.ViewHolder { private TextView message; private TextView usernameView; private TextView displayNameView; private ImageView avatar; FollowViewHolder(View itemView) { super(itemView); message = itemView.findViewById(R.id.notification_text); usernameView = itemView.findViewById(R.id.notification_username); displayNameView = itemView.findViewById(R.id.notification_display_name); avatar = itemView.findViewById(R.id.notification_avatar); //workaround because Android < API 21 does not support setting drawableLeft from xml when it is a vector image Drawable followIcon = ContextCompat.getDrawable(message.getContext(), R.drawable.ic_person_add_24dp); message.setCompoundDrawablesWithIntrinsicBounds(followIcon, null, null, null); } void setMessage(Account account, BidiFormatter bidiFormatter) { Context context = message.getContext(); String format = context.getString(R.string.notification_follow_format); String wrappedDisplayName = bidiFormatter.unicodeWrap(account.getName()); String wholeMessage = String.format(format, wrappedDisplayName); CharSequence emojifiedMessage = CustomEmojiHelper.emojifyString(wholeMessage, account.getEmojis(), message); message.setText(emojifiedMessage); format = context.getString(R.string.status_username_format); String username = String.format(format, account.getUsername()); usernameView.setText(username); CharSequence emojifiedDisplayName = CustomEmojiHelper.emojifyString(wrappedDisplayName, account.getEmojis(), usernameView); displayNameView.setText(emojifiedDisplayName); if (TextUtils.isEmpty(account.getAvatar())) { avatar.setImageResource(R.drawable.avatar_default); } else { Picasso.with(context).load(account.getAvatar()).fit().placeholder(R.drawable.avatar_default) .into(avatar); } } void setupButtons(final NotificationActionListener listener, final String accountId) { avatar.setOnClickListener(v -> listener.onViewAccount(accountId)); } } private static class StatusNotificationViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, ToggleButton.OnCheckedChangeListener { private final TextView message; private final View statusNameBar; private final TextView displayName; private final TextView username; private final TextView timestampInfo; private final TextView statusContent; private final ViewGroup container; private final ImageView statusAvatar; private final ImageView notificationAvatar; private final TextView contentWarningDescriptionTextView; private final ToggleButton contentWarningButton; private String accountId; private String notificationId; private NotificationActionListener notificationActionListener; private StatusViewData.Concrete statusViewData; StatusNotificationViewHolder(View itemView) { super(itemView); message = itemView.findViewById(R.id.notification_top_text); statusNameBar = itemView.findViewById(R.id.status_name_bar); displayName = itemView.findViewById(R.id.status_display_name); username = itemView.findViewById(R.id.status_username); timestampInfo = itemView.findViewById(R.id.status_timestamp_info); statusContent = itemView.findViewById(R.id.notification_content); container = itemView.findViewById(R.id.notification_container); statusAvatar = itemView.findViewById(R.id.notification_status_avatar); notificationAvatar = itemView.findViewById(R.id.notification_notification_avatar); contentWarningDescriptionTextView = itemView .findViewById(R.id.notification_content_warning_description); contentWarningButton = itemView.findViewById(R.id.notification_content_warning_button); int darkerFilter = Color.rgb(123, 123, 123); statusAvatar.setColorFilter(darkerFilter, PorterDuff.Mode.MULTIPLY); notificationAvatar.setColorFilter(darkerFilter, PorterDuff.Mode.MULTIPLY); container.setOnClickListener(this); message.setOnClickListener(this); statusContent.setOnClickListener(this); contentWarningButton.setOnCheckedChangeListener(this); } private void showNotificationContent(boolean show) { statusNameBar.setVisibility(show ? View.VISIBLE : View.GONE); contentWarningDescriptionTextView.setVisibility(show ? View.VISIBLE : View.GONE); contentWarningButton.setVisibility(show ? View.VISIBLE : View.GONE); statusContent.setVisibility(show ? View.VISIBLE : View.GONE); statusAvatar.setVisibility(show ? View.VISIBLE : View.GONE); notificationAvatar.setVisibility(show ? View.VISIBLE : View.GONE); } private void setDisplayName(String name, List<Emoji> emojis) { CharSequence emojifiedName = CustomEmojiHelper.emojifyString(name, emojis, displayName); displayName.setText(emojifiedName); } private void setUsername(String name) { Context context = username.getContext(); String format = context.getString(R.string.status_username_format); String usernameText = String.format(format, name); username.setText(usernameText); } private void setCreatedAt(@Nullable Date createdAt) { // This is the visible timestampInfo. String readout; /* This one is for screen-readers. Frequently, they would mispronounce timestamps like "17m" * as 17 meters instead of minutes. */ CharSequence readoutAloud; if (createdAt != null) { long then = createdAt.getTime(); long now = new Date().getTime(); readout = DateUtils.getRelativeTimeSpanString(timestampInfo.getContext(), then, now); readoutAloud = android.text.format.DateUtils.getRelativeTimeSpanString(then, now, android.text.format.DateUtils.SECOND_IN_MILLIS, android.text.format.DateUtils.FORMAT_ABBREV_RELATIVE); } else { // unknown minutes~ readout = "?m"; readoutAloud = "? minutes"; } timestampInfo.setText(readout); timestampInfo.setContentDescription(readoutAloud); } void setMessage(NotificationViewData.Concrete notificationViewData, LinkListener listener, BidiFormatter bidiFormatter) { this.statusViewData = notificationViewData.getStatusViewData(); String displayName = bidiFormatter.unicodeWrap(notificationViewData.getAccount().getName()); Notification.Type type = notificationViewData.getType(); Context context = message.getContext(); String format; Drawable icon; switch (type) { default: case FAVOURITE: { icon = ContextCompat.getDrawable(context, R.drawable.ic_star_24dp); if (icon != null) { icon.setColorFilter( ContextCompat.getColor(context, R.color.status_favourite_button_marked_dark), PorterDuff.Mode.SRC_ATOP); } format = context.getString(R.string.notification_favourite_format); break; } case REBLOG: { icon = ContextCompat.getDrawable(context, R.drawable.ic_repeat_24dp); if (icon != null) { icon.setColorFilter(ContextCompat.getColor(context, R.color.color_accent_dark), PorterDuff.Mode.SRC_ATOP); } format = context.getString(R.string.notification_reblog_format); break; } } message.setCompoundDrawablesWithIntrinsicBounds(icon, null, null, null); String wholeMessage = String.format(format, displayName); final SpannableStringBuilder str = new SpannableStringBuilder(wholeMessage); str.setSpan(new StyleSpan(Typeface.BOLD), 0, displayName.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); CharSequence emojifiedText = CustomEmojiHelper.emojifyText(str, notificationViewData.getAccount().getEmojis(), message); message.setText(emojifiedText); if (statusViewData != null) { boolean hasSpoiler = !TextUtils.isEmpty(statusViewData.getSpoilerText()); contentWarningDescriptionTextView.setVisibility(hasSpoiler ? View.VISIBLE : View.GONE); contentWarningButton.setVisibility(hasSpoiler ? View.VISIBLE : View.GONE); setupContentAndSpoiler(notificationViewData, listener); } } void setupButtons(final NotificationActionListener listener, final String accountId, final String notificationId) { this.notificationActionListener = listener; this.accountId = accountId; this.notificationId = notificationId; } void setAvatars(@Nullable String statusAvatarUrl, @Nullable String notificationAvatarUrl) { Context context = statusAvatar.getContext(); if (TextUtils.isEmpty(statusAvatarUrl)) { statusAvatar.setImageResource(R.drawable.avatar_default); } else { Picasso.with(context).load(statusAvatarUrl).placeholder(R.drawable.avatar_default) .into(statusAvatar); } if (TextUtils.isEmpty(notificationAvatarUrl)) { notificationAvatar.setImageResource(R.drawable.avatar_default); } else { Picasso.with(context).load(notificationAvatarUrl).placeholder(R.drawable.avatar_default).fit() .into(notificationAvatar); } } @Override public void onClick(View v) { switch (v.getId()) { case R.id.notification_container: case R.id.notification_content: if (notificationActionListener != null) notificationActionListener.onViewStatusForNotificationId(notificationId); break; case R.id.notification_top_text: if (notificationActionListener != null) notificationActionListener.onViewAccount(accountId); break; } } private void setupContentAndSpoiler(NotificationViewData.Concrete notificationViewData, final LinkListener listener) { boolean shouldShowContentIfSpoiler = notificationViewData.isExpanded(); boolean hasSpoiler = !TextUtils.isEmpty(statusViewData.getSpoilerText()); if (!shouldShowContentIfSpoiler && hasSpoiler) { statusContent.setVisibility(View.GONE); } else { statusContent.setVisibility(View.VISIBLE); } Spanned content = statusViewData.getContent(); List<Emoji> emojis = statusViewData.getStatusEmojis(); Spanned emojifiedText = CustomEmojiHelper.emojifyText(content, emojis, statusContent); LinkHelper.setClickableText(statusContent, emojifiedText, statusViewData.getMentions(), listener); Spanned emojifiedContentWarning = CustomEmojiHelper.emojifyString(statusViewData.getSpoilerText(), statusViewData.getStatusEmojis(), contentWarningDescriptionTextView); contentWarningDescriptionTextView.setText(emojifiedContentWarning); } @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (getAdapterPosition() != RecyclerView.NO_POSITION) { notificationActionListener.onExpandedChange(isChecked, getAdapterPosition()); } if (isChecked) { statusContent.setVisibility(View.VISIBLE); } else { statusContent.setVisibility(View.GONE); } } } }