Java tutorial
/* * Copyright 2015 Google Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package io.plaidapp.ui; import android.animation.ValueAnimator; import android.annotation.TargetApi; import android.app.Activity; import android.app.ActivityOptions; import android.app.assist.AssistContent; import android.content.Intent; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.drawable.AnimatedVectorDrawable; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.customtabs.CustomTabsIntent; import android.support.design.widget.Snackbar; import android.support.v4.content.ContextCompat; import android.support.v7.graphics.Palette; import android.support.v7.widget.RecyclerView; import android.text.Spanned; import android.text.TextUtils; import android.text.format.DateUtils; import android.transition.AutoTransition; import android.transition.Transition; import android.transition.TransitionManager; import android.util.Pair; import android.util.TypedValue; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.ViewTreeObserver; import android.widget.Button; import android.widget.EditText; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.bumptech.glide.Glide; import com.bumptech.glide.Priority; import com.bumptech.glide.load.engine.DiskCacheStrategy; import com.bumptech.glide.load.resource.drawable.GlideDrawable; import com.bumptech.glide.request.RequestListener; import com.bumptech.glide.request.target.Target; import java.text.NumberFormat; import java.util.ArrayList; import java.util.List; import butterknife.BindDimen; import butterknife.BindView; import butterknife.ButterKnife; import io.plaidapp.R; import io.plaidapp.data.api.dribbble.DribbbleService; import io.plaidapp.data.api.dribbble.model.Comment; import io.plaidapp.data.api.dribbble.model.Like; import io.plaidapp.data.api.dribbble.model.Shot; import io.plaidapp.data.prefs.DribbblePrefs; import io.plaidapp.ui.recyclerview.InsetDividerDecoration; import io.plaidapp.ui.recyclerview.SlideInItemAnimator; import io.plaidapp.ui.transitions.FabTransform; import io.plaidapp.ui.widget.AuthorTextView; import io.plaidapp.ui.widget.CheckableImageButton; import io.plaidapp.ui.widget.ElasticDragDismissFrameLayout; import io.plaidapp.ui.widget.FABToggle; import io.plaidapp.ui.widget.FabOverlapTextView; import io.plaidapp.ui.widget.ForegroundImageView; import io.plaidapp.ui.widget.ParallaxScrimageView; import io.plaidapp.util.ColorUtils; import io.plaidapp.util.HtmlUtils; import io.plaidapp.util.ImeUtils; import io.plaidapp.util.TransitionUtils; import io.plaidapp.util.ViewUtils; import io.plaidapp.util.customtabs.CustomTabActivityHelper; import io.plaidapp.util.glide.CircleTransform; import io.plaidapp.util.glide.GlideUtils; import okhttp3.HttpUrl; import retrofit2.Call; import retrofit2.Callback; import retrofit2.Response; import static io.plaidapp.util.AnimUtils.getFastOutSlowInInterpolator; public class DribbbleShot extends Activity { public final static String EXTRA_SHOT = "EXTRA_SHOT"; public final static String RESULT_EXTRA_SHOT_ID = "RESULT_EXTRA_SHOT_ID"; private static final int RC_LOGIN_LIKE = 0; private static final int RC_LOGIN_COMMENT = 1; private static final float SCRIM_ADJUSTMENT = 0.075f; @BindView(R.id.draggable_frame) ElasticDragDismissFrameLayout draggableFrame; @BindView(R.id.back) ImageButton back; @BindView(R.id.shot) ParallaxScrimageView imageView; @BindView(R.id.dribbble_comments) RecyclerView commentsList; @BindView(R.id.fab_heart) FABToggle fab; View shotDescription; View shotSpacer; Button likeCount; Button viewCount; Button share; ImageView playerAvatar; EditText enterComment; ImageButton postComment; private View title; private View description; private TextView playerName; private TextView shotTimeAgo; private View commentFooter; private ImageView userAvatar; private ElasticDragDismissFrameLayout.SystemChromeFader chromeFader; Shot shot; int fabOffset; DribbblePrefs dribbblePrefs; boolean performingLike; boolean allowComment; CircleTransform circleTransform; CommentsAdapter adapter; CommentAnimator commentAnimator; @BindDimen(R.dimen.large_avatar_size) int largeAvatarSize; @BindDimen(R.dimen.z_card) int cardElevation; @Override protected void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_dribbble_shot); dribbblePrefs = DribbblePrefs.get(this); circleTransform = new CircleTransform(this); ButterKnife.bind(this); shotDescription = getLayoutInflater().inflate(R.layout.dribbble_shot_description, commentsList, false); shotSpacer = shotDescription.findViewById(R.id.shot_spacer); title = shotDescription.findViewById(R.id.shot_title); description = shotDescription.findViewById(R.id.shot_description); likeCount = (Button) shotDescription.findViewById(R.id.shot_like_count); viewCount = (Button) shotDescription.findViewById(R.id.shot_view_count); share = (Button) shotDescription.findViewById(R.id.shot_share_action); playerName = (TextView) shotDescription.findViewById(R.id.player_name); playerAvatar = (ImageView) shotDescription.findViewById(R.id.player_avatar); shotTimeAgo = (TextView) shotDescription.findViewById(R.id.shot_time_ago); setupCommenting(); commentsList.addOnScrollListener(scrollListener); commentsList.setOnFlingListener(flingListener); back.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { setResultAndFinish(); } }); fab.setOnClickListener(fabClick); chromeFader = new ElasticDragDismissFrameLayout.SystemChromeFader(this) { @Override public void onDragDismissed() { setResultAndFinish(); } }; final Intent intent = getIntent(); if (intent.hasExtra(EXTRA_SHOT)) { shot = intent.getParcelableExtra(EXTRA_SHOT); bindShot(true); } else if (intent.getData() != null) { final HttpUrl url = HttpUrl.parse(intent.getDataString()); if (url.pathSize() == 2 && url.pathSegments().get(0).equals("shots")) { try { final String shotPath = url.pathSegments().get(1); final long id = Long.parseLong(shotPath.substring(0, shotPath.indexOf("-"))); final Call<Shot> shotCall = dribbblePrefs.getApi().getShot(id); shotCall.enqueue(new Callback<Shot>() { @Override public void onResponse(Call<Shot> call, Response<Shot> response) { shot = response.body(); bindShot(false); } @Override public void onFailure(Call<Shot> call, Throwable t) { reportUrlError(); } }); } catch (NumberFormatException | StringIndexOutOfBoundsException ex) { reportUrlError(); } } else { reportUrlError(); } } } @Override protected void onResume() { super.onResume(); if (!performingLike) { checkLiked(); } draggableFrame.addListener(chromeFader); } @Override protected void onPause() { draggableFrame.removeListener(chromeFader); super.onPause(); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case RC_LOGIN_LIKE: if (resultCode == RESULT_OK) { // TODO when we add more authenticated actions will need to keep track of what // the user was trying to do when forced to login fab.setChecked(true); doLike(); setupCommenting(); } break; case RC_LOGIN_COMMENT: if (resultCode == RESULT_OK) { setupCommenting(); } } } @Override public void onBackPressed() { setResultAndFinish(); } @Override public boolean onNavigateUp() { setResultAndFinish(); return true; } @Override @TargetApi(Build.VERSION_CODES.M) public void onProvideAssistContent(AssistContent outContent) { outContent.setWebUri(Uri.parse(shot.url)); } public void postComment(View view) { if (dribbblePrefs.isLoggedIn()) { if (TextUtils.isEmpty(enterComment.getText())) return; enterComment.setEnabled(false); final Call<Comment> postCommentCall = dribbblePrefs.getApi().postComment(shot.id, enterComment.getText().toString().trim()); postCommentCall.enqueue(new Callback<Comment>() { @Override public void onResponse(Call<Comment> call, Response<Comment> response) { loadComments(); enterComment.getText().clear(); enterComment.setEnabled(true); } @Override public void onFailure(Call<Comment> call, Throwable t) { enterComment.setEnabled(true); } }); } else { Intent login = new Intent(DribbbleShot.this, DribbbleLogin.class); FabTransform.addExtras(login, ContextCompat.getColor(DribbbleShot.this, R.color.background_light), R.drawable.ic_comment_add); ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(DribbbleShot.this, postComment, getString(R.string.transition_dribbble_login)); startActivityForResult(login, RC_LOGIN_COMMENT, options.toBundle()); } } void bindShot(final boolean postponeEnterTransition) { final Resources res = getResources(); // load the main image final int[] imageSize = shot.images.bestSize(); Glide.with(this).load(shot.images.best()).listener(shotLoadListener) .diskCacheStrategy(DiskCacheStrategy.SOURCE).priority(Priority.IMMEDIATE) .override(imageSize[0], imageSize[1]).into(imageView); imageView.setOnClickListener(shotClick); shotSpacer.setOnClickListener(shotClick); if (postponeEnterTransition) postponeEnterTransition(); imageView.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { imageView.getViewTreeObserver().removeOnPreDrawListener(this); calculateFabPosition(); if (postponeEnterTransition) startPostponedEnterTransition(); return true; } }); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { ((FabOverlapTextView) title).setText(shot.title); } else { ((TextView) title).setText(shot.title); } if (!TextUtils.isEmpty(shot.description)) { final Spanned descText = shot.getParsedDescription( ContextCompat.getColorStateList(this, R.color.dribbble_links), ContextCompat.getColor(this, R.color.dribbble_link_highlight)); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { ((FabOverlapTextView) description).setText(descText); } else { HtmlUtils.setTextWithNiceLinks((TextView) description, descText); } } else { description.setVisibility(View.GONE); } NumberFormat nf = NumberFormat.getInstance(); likeCount.setText( res.getQuantityString(R.plurals.likes, (int) shot.likes_count, nf.format(shot.likes_count))); likeCount.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { ((AnimatedVectorDrawable) likeCount.getCompoundDrawables()[1]).start(); if (shot.likes_count > 0) { PlayerSheet.start(DribbbleShot.this, shot); } } }); if (shot.likes_count == 0) { likeCount.setBackground(null); // clear touch ripple if doesn't do anything } viewCount.setText( res.getQuantityString(R.plurals.views, (int) shot.views_count, nf.format(shot.views_count))); viewCount.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { ((AnimatedVectorDrawable) viewCount.getCompoundDrawables()[1]).start(); } }); share.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { ((AnimatedVectorDrawable) share.getCompoundDrawables()[1]).start(); new ShareDribbbleImageTask(DribbbleShot.this, shot).execute(); } }); if (shot.user != null) { playerName.setText(shot.user.name.toLowerCase()); Glide.with(this).load(shot.user.getHighQualityAvatarUrl()).transform(circleTransform) .placeholder(R.drawable.avatar_placeholder).override(largeAvatarSize, largeAvatarSize) .into(playerAvatar); View.OnClickListener playerClick = new View.OnClickListener() { @Override public void onClick(View v) { Intent player = new Intent(DribbbleShot.this, PlayerActivity.class); if (shot.user.shots_count > 0) { // legit user object player.putExtra(PlayerActivity.EXTRA_PLAYER, shot.user); } else { // search doesn't fully populate the user object, // in this case send the ID not the full user player.putExtra(PlayerActivity.EXTRA_PLAYER_NAME, shot.user.username); player.putExtra(PlayerActivity.EXTRA_PLAYER_ID, shot.user.id); } ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(DribbbleShot.this, playerAvatar, getString(R.string.transition_player_avatar)); startActivity(player, options.toBundle()); } }; playerAvatar.setOnClickListener(playerClick); playerName.setOnClickListener(playerClick); if (shot.created_at != null) { shotTimeAgo .setText( DateUtils .getRelativeTimeSpanString(shot.created_at.getTime(), System.currentTimeMillis(), DateUtils.SECOND_IN_MILLIS) .toString().toLowerCase()); } } else { playerName.setVisibility(View.GONE); playerAvatar.setVisibility(View.GONE); shotTimeAgo.setVisibility(View.GONE); } commentAnimator = new CommentAnimator(); commentsList.setItemAnimator(commentAnimator); adapter = new CommentsAdapter(shotDescription, commentFooter, shot.comments_count, getResources().getInteger(R.integer.comment_expand_collapse_duration)); commentsList.setAdapter(adapter); commentsList.addItemDecoration(new InsetDividerDecoration(CommentViewHolder.class, res.getDimensionPixelSize(R.dimen.divider_height), res.getDimensionPixelSize(R.dimen.keyline_1), ContextCompat.getColor(this, R.color.divider))); if (shot.comments_count != 0) { loadComments(); } checkLiked(); } void reportUrlError() { Snackbar.make(draggableFrame, R.string.bad_dribbble_shot_url, Snackbar.LENGTH_SHORT).show(); draggableFrame.postDelayed(new Runnable() { @Override public void run() { finishAfterTransition(); } }, 3000L); } private View.OnClickListener shotClick = new View.OnClickListener() { @Override public void onClick(View view) { openLink(shot.url); } }; /** * We run a transition to expand/collapse comments. Scrolling the RecyclerView while this is * running causes issues, so we consume touch events while the transition runs. */ View.OnTouchListener touchEater = new View.OnTouchListener() { @Override public boolean onTouch(View view, MotionEvent motionEvent) { return true; } }; void openLink(String url) { CustomTabActivityHelper.openCustomTab(DribbbleShot.this, new CustomTabsIntent.Builder() .setToolbarColor(ContextCompat.getColor(DribbbleShot.this, R.color.dribbble)) .addDefaultShareMenuItem().build(), Uri.parse(url)); } private RequestListener shotLoadListener = new RequestListener<String, GlideDrawable>() { @Override public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) { final Bitmap bitmap = GlideUtils.getBitmap(resource); final int twentyFourDip = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 24, DribbbleShot.this.getResources().getDisplayMetrics()); Palette.from(bitmap).maximumColorCount(3) .clearFilters() /* by default palette ignore certain hues (e.g. pure black/white) but we don't want this. */ .setRegion(0, 0, bitmap.getWidth() - 1, twentyFourDip) /* - 1 to work around https://code.google.com/p/android/issues/detail?id=191013 */ .generate(new Palette.PaletteAsyncListener() { @Override public void onGenerated(Palette palette) { boolean isDark; @ColorUtils.Lightness int lightness = ColorUtils.isDark(palette); if (lightness == ColorUtils.LIGHTNESS_UNKNOWN) { isDark = ColorUtils.isDark(bitmap, bitmap.getWidth() / 2, 0); } else { isDark = lightness == ColorUtils.IS_DARK; } if (!isDark) { // make back icon dark on light images back.setColorFilter(ContextCompat.getColor(DribbbleShot.this, R.color.dark_icon)); } // color the status bar. Set a complementary dark color on L, // light or dark color on M (with matching status bar icons) int statusBarColor = getWindow().getStatusBarColor(); final Palette.Swatch topColor = ColorUtils.getMostPopulousSwatch(palette); if (topColor != null && (isDark || Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)) { statusBarColor = ColorUtils.scrimify(topColor.getRgb(), isDark, SCRIM_ADJUSTMENT); // set a light status bar on M+ if (!isDark && Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { ViewUtils.setLightStatusBar(imageView); } } if (statusBarColor != getWindow().getStatusBarColor()) { imageView.setScrimColor(statusBarColor); ValueAnimator statusBarColorAnim = ValueAnimator .ofArgb(getWindow().getStatusBarColor(), statusBarColor); statusBarColorAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { getWindow().setStatusBarColor((int) animation.getAnimatedValue()); } }); statusBarColorAnim.setDuration(1000L); statusBarColorAnim.setInterpolator(getFastOutSlowInInterpolator(DribbbleShot.this)); statusBarColorAnim.start(); } } }); Palette.from(bitmap).clearFilters().generate(new Palette.PaletteAsyncListener() { @Override public void onGenerated(Palette palette) { // color the ripple on the image spacer (default is grey) shotSpacer.setBackground(ViewUtils.createRipple(palette, 0.25f, 0.5f, ContextCompat.getColor(DribbbleShot.this, R.color.mid_grey), true)); // slightly more opaque ripple on the pinned image to compensate // for the scrim imageView.setForeground(ViewUtils.createRipple(palette, 0.3f, 0.6f, ContextCompat.getColor(DribbbleShot.this, R.color.mid_grey), true)); } }); // TODO should keep the background if the image contains transparency?! imageView.setBackground(null); return false; } @Override public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) { return false; } }; private View.OnFocusChangeListener enterCommentFocus = new View.OnFocusChangeListener() { @Override public void onFocusChange(View view, boolean hasFocus) { // kick off an anim (via animated state list) on the post button. see // @drawable/ic_add_comment postComment.setActivated(hasFocus); // prevent content hovering over image when not pinned. if (hasFocus) { imageView.bringToFront(); imageView.setOffset(-imageView.getHeight()); imageView.setImmediatePin(true); } } }; private RecyclerView.OnScrollListener scrollListener = new RecyclerView.OnScrollListener() { @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { final int scrollY = shotDescription.getTop(); imageView.setOffset(scrollY); fab.setOffset(fabOffset + scrollY); } @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { // as we animate the main image's elevation change when it 'pins' at it's min height // a fling can cause the title to go over the image before the animation has a chance to // run. In this case we short circuit the animation and just jump to state. imageView.setImmediatePin(newState == RecyclerView.SCROLL_STATE_SETTLING); } }; private RecyclerView.OnFlingListener flingListener = new RecyclerView.OnFlingListener() { @Override public boolean onFling(int velocityX, int velocityY) { imageView.setImmediatePin(true); return false; } }; private View.OnClickListener fabClick = new View.OnClickListener() { @Override public void onClick(View view) { if (dribbblePrefs.isLoggedIn()) { fab.toggle(); doLike(); } else { final Intent login = new Intent(DribbbleShot.this, DribbbleLogin.class); FabTransform.addExtras(login, ContextCompat.getColor(DribbbleShot.this, R.color.dribbble), R.drawable.ic_heart_empty_56dp); ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(DribbbleShot.this, fab, getString(R.string.transition_dribbble_login)); startActivityForResult(login, RC_LOGIN_LIKE, options.toBundle()); } } }; void loadComments() { final Call<List<Comment>> commentsCall = dribbblePrefs.getApi().getComments(shot.id, 0, DribbbleService.PER_PAGE_MAX); commentsCall.enqueue(new Callback<List<Comment>>() { @Override public void onResponse(Call<List<Comment>> call, Response<List<Comment>> response) { final List<Comment> comments = response.body(); if (comments != null && !comments.isEmpty()) { adapter.addComments(comments); } } @Override public void onFailure(Call<List<Comment>> call, Throwable t) { } }); } void setResultAndFinish() { final Intent resultData = new Intent(); resultData.putExtra(RESULT_EXTRA_SHOT_ID, shot.id); setResult(RESULT_OK, resultData); finishAfterTransition(); } void calculateFabPosition() { // calculate 'natural' position i.e. with full height image. Store it for use when scrolling fabOffset = imageView.getHeight() + title.getHeight() - (fab.getHeight() / 2); fab.setOffset(fabOffset); // calculate min position i.e. pinned to the collapsed image when scrolled fab.setMinOffset(imageView.getMinimumHeight() - (fab.getHeight() / 2)); } void doLike() { performingLike = true; if (fab.isChecked()) { final Call<Like> likeCall = dribbblePrefs.getApi().like(shot.id); likeCall.enqueue(new Callback<Like>() { @Override public void onResponse(Call<Like> call, Response<Like> response) { performingLike = false; } @Override public void onFailure(Call<Like> call, Throwable t) { performingLike = false; } }); } else { final Call<Void> unlikeCall = dribbblePrefs.getApi().unlike(shot.id); unlikeCall.enqueue(new Callback<Void>() { @Override public void onResponse(Call<Void> call, Response<Void> response) { performingLike = false; } @Override public void onFailure(Call<Void> call, Throwable t) { performingLike = false; } }); } } boolean isOP(long playerId) { return shot.user != null && shot.user.id == playerId; } private void checkLiked() { if (shot != null && dribbblePrefs.isLoggedIn()) { final Call<Like> likedCall = dribbblePrefs.getApi().liked(shot.id); likedCall.enqueue(new Callback<Like>() { @Override public void onResponse(Call<Like> call, Response<Like> response) { // note that like.user will be null here fab.setChecked(response.body() != null); } @Override public void onFailure(Call<Like> call, Throwable t) { // 404 is expected if shot is not liked fab.setChecked(false); fab.jumpDrawablesToCurrentState(); } }); } } private void setupCommenting() { allowComment = !dribbblePrefs.isLoggedIn() || (dribbblePrefs.isLoggedIn() && dribbblePrefs.userCanPost()); if (allowComment && commentFooter == null) { commentFooter = getLayoutInflater().inflate(R.layout.dribbble_enter_comment, commentsList, false); userAvatar = (ForegroundImageView) commentFooter.findViewById(R.id.avatar); enterComment = (EditText) commentFooter.findViewById(R.id.comment); postComment = (ImageButton) commentFooter.findViewById(R.id.post_comment); enterComment.setOnFocusChangeListener(enterCommentFocus); } else if (!allowComment && commentFooter != null) { adapter.removeCommentingFooter(); commentFooter = null; Toast.makeText(getApplicationContext(), R.string.prospects_cant_post, Toast.LENGTH_SHORT).show(); } if (allowComment && dribbblePrefs.isLoggedIn() && !TextUtils.isEmpty(dribbblePrefs.getUserAvatar())) { Glide.with(this).load(dribbblePrefs.getUserAvatar()).transform(circleTransform) .placeholder(R.drawable.ic_player).into(userAvatar); } } class CommentsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { private static final int EXPAND = 0x1; private static final int COLLAPSE = 0x2; private static final int COMMENT_LIKE = 0x3; private static final int REPLY = 0x4; private final List<Comment> comments = new ArrayList<>(); final Transition expandCollapse; private final View description; private View footer; private boolean loading; private boolean noComments; int expandedCommentPosition = RecyclerView.NO_POSITION; CommentsAdapter(@NonNull View description, @Nullable View footer, long commentCount, long expandDuration) { this.description = description; this.footer = footer; noComments = commentCount == 0L; loading = !noComments; expandCollapse = new AutoTransition(); expandCollapse.setDuration(expandDuration); expandCollapse.setInterpolator(getFastOutSlowInInterpolator(DribbbleShot.this)); expandCollapse.addListener(new TransitionUtils.TransitionListenerAdapter() { @Override public void onTransitionStart(Transition transition) { commentsList.setOnTouchListener(touchEater); } @Override public void onTransitionEnd(Transition transition) { commentAnimator.setAnimateMoves(true); commentsList.setOnTouchListener(null); } }); } @Override public int getItemViewType(int position) { if (position == 0) return R.layout.dribbble_shot_description; if (position == 1) { if (loading) return R.layout.loading; if (noComments) return R.layout.dribbble_no_comments; } if (footer != null) { int footerPos = (loading || noComments) ? 2 : comments.size() + 1; if (position == footerPos) return R.layout.dribbble_enter_comment; } return R.layout.dribbble_comment; } @Override public int getItemCount() { int count = 1; // description if (!comments.isEmpty()) { count += comments.size(); } else { count++; // either loading or no comments } if (footer != null) count++; return count; } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { switch (viewType) { case R.layout.dribbble_shot_description: return new SimpleViewHolder(description); case R.layout.dribbble_comment: return createCommentHolder(parent, viewType); case R.layout.loading: case R.layout.dribbble_no_comments: return new SimpleViewHolder(getLayoutInflater().inflate(viewType, parent, false)); case R.layout.dribbble_enter_comment: return new SimpleViewHolder(footer); } throw new IllegalArgumentException(); } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { switch (getItemViewType(position)) { case R.layout.dribbble_comment: bindComment((CommentViewHolder) holder, getComment(position)); break; } } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position, List<Object> partialChangePayloads) { if (holder instanceof CommentViewHolder) { bindPartialCommentChange((CommentViewHolder) holder, position, partialChangePayloads); } else { onBindViewHolder(holder, position); } } Comment getComment(int adapterPosition) { return comments.get(adapterPosition - 1); // description } void addComments(List<Comment> newComments) { hideLoadingIndicator(); noComments = false; comments.addAll(newComments); notifyItemRangeInserted(1, newComments.size()); } void removeCommentingFooter() { if (footer == null) return; int footerPos = getItemCount() - 1; footer = null; notifyItemRemoved(footerPos); } private CommentViewHolder createCommentHolder(ViewGroup parent, int viewType) { final CommentViewHolder holder = new CommentViewHolder( getLayoutInflater().inflate(viewType, parent, false)); holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { final int position = holder.getAdapterPosition(); if (position == RecyclerView.NO_POSITION) return; final Comment comment = getComment(position); TransitionManager.beginDelayedTransition(commentsList, expandCollapse); commentAnimator.setAnimateMoves(false); // collapse any currently expanded items if (RecyclerView.NO_POSITION != expandedCommentPosition) { notifyItemChanged(expandedCommentPosition, COLLAPSE); } // expand this item (if it wasn't already) if (expandedCommentPosition != position) { expandedCommentPosition = position; notifyItemChanged(position, EXPAND); if (comment.liked == null) { final Call<Like> liked = dribbblePrefs.getApi().likedComment(shot.id, comment.id); liked.enqueue(new Callback<Like>() { @Override public void onResponse(Call<Like> call, Response<Like> response) { comment.liked = response.isSuccessful(); holder.likeHeart.setChecked(comment.liked); holder.likeHeart.jumpDrawablesToCurrentState(); } @Override public void onFailure(Call<Like> call, Throwable t) { } }); } if (enterComment != null && enterComment.hasFocus()) { enterComment.clearFocus(); ImeUtils.hideIme(enterComment); } holder.itemView.requestFocus(); } else { expandedCommentPosition = RecyclerView.NO_POSITION; } } }); holder.avatar.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { final int position = holder.getAdapterPosition(); if (position == RecyclerView.NO_POSITION) return; final Comment comment = getComment(position); final Intent player = new Intent(DribbbleShot.this, PlayerActivity.class); player.putExtra(PlayerActivity.EXTRA_PLAYER, comment.user); ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(DribbbleShot.this, Pair.create(holder.itemView, getString(R.string.transition_player_background)), Pair.create((View) holder.avatar, getString(R.string.transition_player_avatar))); startActivity(player, options.toBundle()); } }); holder.reply.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { final int position = holder.getAdapterPosition(); if (position == RecyclerView.NO_POSITION) return; final Comment comment = getComment(position); enterComment.setText("@" + comment.user.username + " "); enterComment.setSelection(enterComment.getText().length()); // collapse the comment and scroll the reply box (in the footer) into view expandedCommentPosition = RecyclerView.NO_POSITION; notifyItemChanged(position, REPLY); holder.reply.jumpDrawablesToCurrentState(); enterComment.requestFocus(); commentsList.smoothScrollToPosition(getItemCount() - 1); } }); holder.likeHeart.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (dribbblePrefs.isLoggedIn()) { final int position = holder.getAdapterPosition(); if (position == RecyclerView.NO_POSITION) return; final Comment comment = getComment(position); if (comment.liked == null || !comment.liked) { comment.liked = true; comment.likes_count++; holder.likesCount.setText(String.valueOf(comment.likes_count)); notifyItemChanged(position, COMMENT_LIKE); final Call<Like> likeCommentCall = dribbblePrefs.getApi().likeComment(shot.id, comment.id); likeCommentCall.enqueue(new Callback<Like>() { @Override public void onResponse(Call<Like> call, Response<Like> response) { } @Override public void onFailure(Call<Like> call, Throwable t) { } }); } else { comment.liked = false; comment.likes_count--; holder.likesCount.setText(String.valueOf(comment.likes_count)); notifyItemChanged(position, COMMENT_LIKE); final Call<Void> unlikeCommentCall = dribbblePrefs.getApi().unlikeComment(shot.id, comment.id); unlikeCommentCall.enqueue(new Callback<Void>() { @Override public void onResponse(Call<Void> call, Response<Void> response) { } @Override public void onFailure(Call<Void> call, Throwable t) { } }); } } else { holder.likeHeart.setChecked(false); startActivityForResult(new Intent(DribbbleShot.this, DribbbleLogin.class), RC_LOGIN_LIKE); } } }); holder.likesCount.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { final int position = holder.getAdapterPosition(); if (position == RecyclerView.NO_POSITION) return; final Comment comment = getComment(position); final Call<List<Like>> commentLikesCall = dribbblePrefs.getApi().getCommentLikes(shot.id, comment.id); commentLikesCall.enqueue(new Callback<List<Like>>() { @Override public void onResponse(Call<List<Like>> call, Response<List<Like>> response) { // TODO something better than this. StringBuilder sb = new StringBuilder("Liked by:\n\n"); for (Like like : response.body()) { if (like.user != null) { sb.append("@"); sb.append(like.user.username); sb.append("\n"); } } Toast.makeText(getApplicationContext(), sb.toString(), Toast.LENGTH_SHORT).show(); } @Override public void onFailure(Call<List<Like>> call, Throwable t) { } }); } }); return holder; } private void bindComment(CommentViewHolder holder, Comment comment) { final int position = holder.getAdapterPosition(); final boolean isExpanded = position == expandedCommentPosition; Glide.with(DribbbleShot.this).load(comment.user.getHighQualityAvatarUrl()).transform(circleTransform) .placeholder(R.drawable.avatar_placeholder).override(largeAvatarSize, largeAvatarSize) .into(holder.avatar); holder.author.setText(comment.user.name.toLowerCase()); holder.author.setOriginalPoster(isOP(comment.user.id)); holder.timeAgo .setText(comment.created_at == null ? "" : DateUtils .getRelativeTimeSpanString(comment.created_at.getTime(), System.currentTimeMillis(), DateUtils.SECOND_IN_MILLIS) .toString().toLowerCase()); HtmlUtils.setTextWithNiceLinks(holder.commentBody, comment.getParsedBody(holder.commentBody)); holder.likeHeart.setChecked(comment.liked != null && comment.liked); holder.likeHeart.setEnabled(comment.user.id != dribbblePrefs.getUserId()); holder.likesCount.setText(String.valueOf(comment.likes_count)); setExpanded(holder, isExpanded); } private void setExpanded(CommentViewHolder holder, boolean isExpanded) { holder.itemView.setActivated(isExpanded); holder.reply.setVisibility((isExpanded && allowComment) ? View.VISIBLE : View.GONE); holder.likeHeart.setVisibility(isExpanded ? View.VISIBLE : View.GONE); holder.likesCount.setVisibility(isExpanded ? View.VISIBLE : View.GONE); } private void bindPartialCommentChange(CommentViewHolder holder, int position, List<Object> partialChangePayloads) { // for certain changes we don't need to rebind data, just update some view state if ((partialChangePayloads.contains(EXPAND) || partialChangePayloads.contains(COLLAPSE)) || partialChangePayloads.contains(REPLY)) { setExpanded(holder, position == expandedCommentPosition); } else if (partialChangePayloads.contains(COMMENT_LIKE)) { return; // nothing to do } else { onBindViewHolder(holder, position); } } private void hideLoadingIndicator() { if (!loading) return; loading = false; notifyItemRemoved(1); } } static class SimpleViewHolder extends RecyclerView.ViewHolder { SimpleViewHolder(View itemView) { super(itemView); } } static class CommentViewHolder extends RecyclerView.ViewHolder { @BindView(R.id.player_avatar) ImageView avatar; @BindView(R.id.comment_author) AuthorTextView author; @BindView(R.id.comment_time_ago) TextView timeAgo; @BindView(R.id.comment_text) TextView commentBody; @BindView(R.id.comment_reply) ImageButton reply; @BindView(R.id.comment_like) CheckableImageButton likeHeart; @BindView(R.id.comment_likes_count) TextView likesCount; CommentViewHolder(View itemView) { super(itemView); ButterKnife.bind(this, itemView); } } /** * A {@link RecyclerView.ItemAnimator} which allows disabling move animations. RecyclerView * does not like animating item height changes. {@link android.transition.ChangeBounds} allows * this but in order to simultaneously collapse one item and expand another, we need to run the * Transition on the entire RecyclerView. As such it attempts to move views around. This * custom item animator allows us to stop RecyclerView from trying to handle this for us while * the transition is running. */ static class CommentAnimator extends SlideInItemAnimator { private boolean animateMoves = false; CommentAnimator() { super(); } void setAnimateMoves(boolean animateMoves) { this.animateMoves = animateMoves; } @Override public boolean animateMove(RecyclerView.ViewHolder holder, int fromX, int fromY, int toX, int toY) { if (!animateMoves) { dispatchMoveFinished(holder); return false; } return super.animateMove(holder, fromX, fromY, toX, toY); } } }