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.app.Activity; import android.app.ActivityOptions; import android.content.Intent; import android.content.res.Resources; import android.graphics.drawable.AnimatedVectorDrawable; import android.os.Bundle; import android.support.v4.content.ContextCompat; import android.support.v7.widget.GridLayoutManager; import android.support.v7.widget.RecyclerView; import android.text.TextUtils; import android.transition.TransitionManager; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.WindowInsets; import android.widget.Button; import android.widget.ImageView; import android.widget.ProgressBar; import android.widget.TextView; import com.bumptech.glide.Glide; import java.text.NumberFormat; import java.util.List; import butterknife.BindInt; import butterknife.BindView; import butterknife.ButterKnife; import butterknife.OnClick; import io.plaidapp.R; import io.plaidapp.data.api.dribbble.PlayerShotsDataManager; import io.plaidapp.data.api.dribbble.model.Shot; import io.plaidapp.data.api.dribbble.model.User; import io.plaidapp.data.pocket.PocketUtils; import io.plaidapp.data.prefs.DribbblePrefs; import io.plaidapp.ui.recyclerview.InfiniteScrollListener; import io.plaidapp.ui.recyclerview.SlideInItemAnimator; import io.plaidapp.ui.transitions.MorphTransform; import io.plaidapp.ui.widget.ElasticDragDismissFrameLayout; import io.plaidapp.util.DribbbleUtils; import io.plaidapp.util.ViewUtils; import io.plaidapp.util.glide.CircleTransform; import retrofit2.Call; import retrofit2.Callback; import retrofit2.Response; /** * A screen displaying a player's details and their shots. */ public class PlayerActivity extends Activity { public static final String EXTRA_PLAYER = "EXTRA_PLAYER"; public static final String EXTRA_PLAYER_NAME = "EXTRA_PLAYER_NAME"; public static final String EXTRA_PLAYER_ID = "EXTRA_PLAYER_ID"; public static final String EXTRA_PLAYER_USERNAME = "EXTRA_PLAYER_USERNAME"; User player; PlayerShotsDataManager dataManager; FeedAdapter adapter; GridLayoutManager layoutManager; Boolean following; private ElasticDragDismissFrameLayout.SystemChromeFader chromeFader; private CircleTransform circleTransform; private int followerCount; @BindView(R.id.draggable_frame) ElasticDragDismissFrameLayout draggableFrame; @BindView(R.id.container) ViewGroup container; @BindView(R.id.avatar) ImageView avatar; @BindView(R.id.player_name) TextView playerName; @BindView(R.id.follow) Button follow; @BindView(R.id.player_bio) TextView bio; @BindView(R.id.shot_count) TextView shotCount; @BindView(R.id.followers_count) TextView followersCount; @BindView(R.id.likes_count) TextView likesCount; @BindView(R.id.loading) ProgressBar loading; @BindView(R.id.player_shots) RecyclerView shots; @BindInt(R.integer.num_columns) int columns; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_dribbble_player); ButterKnife.bind(this); circleTransform = new CircleTransform(this); chromeFader = new ElasticDragDismissFrameLayout.SystemChromeFader(this); final Intent intent = getIntent(); if (intent.hasExtra(EXTRA_PLAYER)) { player = intent.getParcelableExtra(EXTRA_PLAYER); bindPlayer(); } else if (intent.hasExtra(EXTRA_PLAYER_NAME)) { String name = intent.getStringExtra(EXTRA_PLAYER_NAME); playerName.setText(name); if (intent.hasExtra(EXTRA_PLAYER_ID)) { long userId = intent.getLongExtra(EXTRA_PLAYER_ID, 0L); loadPlayer(userId); } else if (intent.hasExtra(EXTRA_PLAYER_USERNAME)) { String username = intent.getStringExtra(EXTRA_PLAYER_USERNAME); loadPlayer(username); } } else if (intent.getData() != null) { // todo support url intents } // setup immersive mode i.e. draw behind the system chrome & adjust insets draggableFrame.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION); draggableFrame.setOnApplyWindowInsetsListener(new View.OnApplyWindowInsetsListener() { @Override public WindowInsets onApplyWindowInsets(View v, WindowInsets insets) { final ViewGroup.MarginLayoutParams lpFrame = (ViewGroup.MarginLayoutParams) draggableFrame .getLayoutParams(); lpFrame.leftMargin += insets.getSystemWindowInsetLeft(); // landscape lpFrame.rightMargin += insets.getSystemWindowInsetRight(); // landscape ((ViewGroup.MarginLayoutParams) avatar.getLayoutParams()).topMargin += insets .getSystemWindowInsetTop(); ViewUtils.setPaddingTop(container, insets.getSystemWindowInsetTop()); ViewUtils.setPaddingBottom(shots, insets.getSystemWindowInsetBottom()); // clear this listener so insets aren't re-applied draggableFrame.setOnApplyWindowInsetsListener(null); return insets; } }); setExitSharedElementCallback(FeedAdapter.createSharedElementReenterCallback(this)); } @Override protected void onResume() { super.onResume(); draggableFrame.addListener(chromeFader); } @Override protected void onPause() { draggableFrame.removeListener(chromeFader); super.onPause(); } @Override protected void onDestroy() { if (dataManager != null) { dataManager.cancelLoading(); } super.onDestroy(); } @Override public void onActivityReenter(int resultCode, Intent data) { if (data == null || resultCode != RESULT_OK || !data.hasExtra(DribbbleShot.RESULT_EXTRA_SHOT_ID)) return; // When reentering, if the shared element is no longer on screen (e.g. after an // orientation change) then scroll it into view. final long sharedShotId = data.getLongExtra(DribbbleShot.RESULT_EXTRA_SHOT_ID, -1L); if (sharedShotId != -1L // returning from a shot && adapter.getDataItemCount() > 0 // grid populated && shots.findViewHolderForItemId(sharedShotId) == null) { // view not attached final int position = adapter.getItemPosition(sharedShotId); if (position == RecyclerView.NO_POSITION) return; // delay the transition until our shared element is on-screen i.e. has been laid out postponeEnterTransition(); shots.addOnLayoutChangeListener(new View.OnLayoutChangeListener() { @Override public void onLayoutChange(View v, int l, int t, int r, int b, int oL, int oT, int oR, int oB) { shots.removeOnLayoutChangeListener(this); startPostponedEnterTransition(); } }); shots.scrollToPosition(position); } } void bindPlayer() { if (player == null) return; final Resources res = getResources(); final NumberFormat nf = NumberFormat.getInstance(); Glide.with(this).load(player.getHighQualityAvatarUrl()).placeholder(R.drawable.avatar_placeholder) .transform(circleTransform).into(avatar); playerName.setText(player.name.toLowerCase()); if (!TextUtils.isEmpty(player.bio)) { DribbbleUtils.parseAndSetText(bio, player.bio); } else { bio.setVisibility(View.GONE); } shotCount .setText(res.getQuantityString(R.plurals.shots, player.shots_count, nf.format(player.shots_count))); if (player.shots_count == 0) { shotCount.setCompoundDrawablesRelativeWithIntrinsicBounds(null, getDrawable(R.drawable.avd_no_shots), null, null); } setFollowerCount(player.followers_count); likesCount .setText(res.getQuantityString(R.plurals.likes, player.likes_count, nf.format(player.likes_count))); // load the users shots dataManager = new PlayerShotsDataManager(this, player) { @Override public void onDataLoaded(List<Shot> data) { if (data != null && data.size() > 0) { if (adapter.getDataItemCount() == 0) { loading.setVisibility(View.GONE); ViewUtils.setPaddingTop(shots, likesCount.getBottom()); } adapter.addAndResort(data); } } }; adapter = new FeedAdapter(this, dataManager, columns, PocketUtils.isPocketInstalled(this)); shots.setAdapter(adapter); shots.setItemAnimator(new SlideInItemAnimator()); shots.setVisibility(View.VISIBLE); layoutManager = new GridLayoutManager(this, columns); layoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() { @Override public int getSpanSize(int position) { return adapter.getItemColumnSpan(position); } }); shots.setLayoutManager(layoutManager); shots.addOnScrollListener(new InfiniteScrollListener(layoutManager, dataManager) { @Override public void onLoadMore() { dataManager.loadData(); } }); shots.setHasFixedSize(true); // forward on any clicks above the first item in the grid (i.e. in the paddingTop) // to 'pass through' to the view behind shots.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { final int firstVisible = layoutManager.findFirstVisibleItemPosition(); if (firstVisible > 0) return false; // if no data loaded then pass through if (adapter.getDataItemCount() == 0) { return container.dispatchTouchEvent(event); } final RecyclerView.ViewHolder vh = shots.findViewHolderForAdapterPosition(0); if (vh == null) return false; final int firstTop = vh.itemView.getTop(); if (event.getY() < firstTop) { return container.dispatchTouchEvent(event); } return false; } }); // check if following if (dataManager.getDribbblePrefs().isLoggedIn()) { if (player.id == dataManager.getDribbblePrefs().getUserId()) { TransitionManager.beginDelayedTransition(container); follow.setVisibility(View.GONE); ViewUtils.setPaddingTop(shots, container.getHeight() - follow.getHeight() - ((ViewGroup.MarginLayoutParams) follow.getLayoutParams()).bottomMargin); } else { final Call<Void> followingCall = dataManager.getDribbbleApi().following(player.id); followingCall.enqueue(new Callback<Void>() { @Override public void onResponse(Call<Void> call, Response<Void> response) { following = response.isSuccessful(); if (!following) return; TransitionManager.beginDelayedTransition(container); follow.setText(R.string.following); follow.setActivated(true); } @Override public void onFailure(Call<Void> call, Throwable t) { } }); } } if (player.shots_count > 0) { dataManager.loadData(); // kick off initial load } else { loading.setVisibility(View.GONE); } } @OnClick(R.id.follow) void follow() { if (DribbblePrefs.get(this).isLoggedIn()) { if (following != null && following) { final Call<Void> unfollowCall = dataManager.getDribbbleApi().unfollow(player.id); unfollowCall.enqueue(new Callback<Void>() { @Override public void onResponse(Call<Void> call, Response<Void> response) { } @Override public void onFailure(Call<Void> call, Throwable t) { } }); following = false; TransitionManager.beginDelayedTransition(container); follow.setText(R.string.follow); follow.setActivated(false); setFollowerCount(followerCount - 1); } else { final Call<Void> followCall = dataManager.getDribbbleApi().follow(player.id); followCall.enqueue(new Callback<Void>() { @Override public void onResponse(Call<Void> call, Response<Void> response) { } @Override public void onFailure(Call<Void> call, Throwable t) { } }); following = true; TransitionManager.beginDelayedTransition(container); follow.setText(R.string.following); follow.setActivated(true); setFollowerCount(followerCount + 1); } } else { Intent login = new Intent(this, DribbbleLogin.class); MorphTransform.addExtras(login, ContextCompat.getColor(this, R.color.dribbble), getResources().getDimensionPixelSize(R.dimen.dialog_corners)); ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(this, follow, getString(R.string.transition_dribbble_login)); startActivity(login, options.toBundle()); } } @OnClick({ R.id.shot_count, R.id.followers_count, R.id.likes_count }) void playerActionClick(TextView view) { ((AnimatedVectorDrawable) view.getCompoundDrawables()[1]).start(); switch (view.getId()) { case R.id.followers_count: PlayerSheet.start(PlayerActivity.this, player); break; } } private void loadPlayer(long userId) { final Call<User> userCall = DribbblePrefs.get(this).getApi().getUser(userId); userCall.enqueue(new Callback<User>() { @Override public void onResponse(Call<User> call, Response<User> response) { player = response.body(); bindPlayer(); } @Override public void onFailure(Call<User> call, Throwable t) { } }); } private void loadPlayer(String username) { final Call<User> userCall = DribbblePrefs.get(this).getApi().getUser(username); userCall.enqueue(new Callback<User>() { @Override public void onResponse(Call<User> call, Response<User> response) { player = response.body(); bindPlayer(); } @Override public void onFailure(Call<User> call, Throwable t) { } }); } private void setFollowerCount(int count) { followerCount = count; followersCount.setText(getResources().getQuantityString(R.plurals.follower_count, followerCount, NumberFormat.getInstance().format(followerCount))); if (followerCount == 0) { followersCount.setBackground(null); } } }