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 org.goodev.material; import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.animation.AnimatorSet; import android.animation.ObjectAnimator; import android.annotation.TargetApi; import android.app.SearchManager; import android.content.Context; import android.content.Intent; import android.graphics.Color; import android.graphics.Typeface; import android.graphics.drawable.AnimatedVectorDrawable; import android.os.Build; import android.os.Bundle; import android.support.design.widget.Snackbar; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.GridLayoutManager; import android.support.v7.widget.RecyclerView; import android.text.InputType; import android.text.SpannableStringBuilder; import android.text.Spanned; import android.text.TextUtils; import android.text.style.StyleSpan; import android.transition.Transition; import android.transition.TransitionInflater; import android.transition.TransitionManager; import android.util.TypedValue; import android.view.View; import android.view.ViewAnimationUtils; import android.view.ViewGroup; import android.view.ViewStub; import android.view.ViewTreeObserver; import android.view.animation.AnimationUtils; import android.view.inputmethod.EditorInfo; import android.widget.ImageButton; import android.widget.ProgressBar; import android.widget.SearchView; import org.goodev.material.api.SearchDataManager; import org.goodev.material.model.Hit; import org.goodev.material.ui.FeedAdapter; import org.goodev.material.util.ImeUtils; import org.goodev.material.util.UI; import org.goodev.material.util.ViewUtils; import org.goodev.material.widget.BaselineGridTextView; import org.goodev.material.widget.InfiniteScrollListener; import java.util.List; import butterknife.Bind; import butterknife.BindDimen; import butterknife.BindInt; import butterknife.ButterKnife; import butterknife.OnClick; public class SearchActivity extends AppCompatActivity { public static final String EXTRA_MENU_LEFT = "EXTRA_MENU_LEFT"; public static final String EXTRA_MENU_CENTER_X = "EXTRA_MENU_CENTER_X"; public static final String EXTRA_QUERY = "EXTRA_QUERY"; public static final String EXTRA_SAVE_DRIBBBLE = "EXTRA_SAVE_DRIBBBLE"; public static final String EXTRA_SAVE_DESIGNER_NEWS = "EXTRA_SAVE_DESIGNER_NEWS"; public static final int RESULT_CODE_SAVE = 7; @Bind(R.id.searchback) ImageButton searchBack; @Bind(R.id.searchback_container) ViewGroup searchBackContainer; @Bind(R.id.search_view) SearchView searchView; @Bind(R.id.search_background) View searchBackground; @Bind(android.R.id.empty) ProgressBar progress; @Bind(R.id.search_results) RecyclerView results; @Bind(R.id.container) ViewGroup container; @Bind(R.id.search_toolbar) ViewGroup searchToolbar; @Bind(R.id.results_container) ViewGroup resultsContainer; @Bind(R.id.scrim) View scrim; @Bind(R.id.results_scrim) View resultsScrim; private BaselineGridTextView noResults; @BindInt(R.integer.shot_column) int columns; @BindDimen(R.dimen.z_app_bar) float appBarElevation; private Transition auto; private int searchBackDistanceX; private int searchIconCenterX; private SearchDataManager dataManager; private FeedAdapter adapter; public static Intent createStartIntent(Context context, int menuIconLeft, int menuIconCenterX) { Intent starter = new Intent(context, SearchActivity.class); starter.putExtra(EXTRA_MENU_LEFT, menuIconLeft); starter.putExtra(EXTRA_MENU_CENTER_X, menuIconCenterX); return starter; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_search); ButterKnife.bind(this); setupSearchView(); if (UI.isLollipop()) { auto = TransitionInflater.from(this).inflateTransition(R.transition.auto); } dataManager = new SearchDataManager(this) { @Override public void onDataLoaded(List<Hit> data) { if (data != null && data.size() > 0) { if (results.getVisibility() != View.VISIBLE) { if (UI.isLollipop()) { TransitionManager.beginDelayedTransition(container, auto); } progress.setVisibility(View.GONE); results.setVisibility(View.VISIBLE); } adapter.addAll(data); if (dataManager.getPage() == 0) { results.scrollToPosition(0); } } else if (adapter.getItemCount() == 0) { if (UI.isLollipop()) { TransitionManager.beginDelayedTransition(container, auto); } progress.setVisibility(View.GONE); setNoResultsVisibility(View.VISIBLE); } else { adapter.notifyDataSetChanged(); Snackbar.make(results, R.string.no_more_posts, Snackbar.LENGTH_LONG).show(); } } }; adapter = new FeedAdapter(this, dataManager, columns); results.setAdapter(adapter); GridLayoutManager layoutManager = new GridLayoutManager(this, columns); // layoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() { // @Override // public int getSpanSize(int position) { // return adapter.getItemColumnSpan(position); // } // }); results.setLayoutManager(layoutManager); results.addOnScrollListener(new InfiniteScrollListener(layoutManager, dataManager) { @Override public void onLoadMore() { dataManager.loadMore(); } }); results.setHasFixedSize(true); if (UI.isLollipop()) { results.addOnScrollListener(gridScroll); } // extract the search icon's location passed from the launching activity, minus 4dp to // compensate for different paddings in the views searchBackDistanceX = getIntent().getIntExtra(EXTRA_MENU_LEFT, 0) - (int) TypedValue .applyDimension(TypedValue.COMPLEX_UNIT_DIP, 4, getResources().getDisplayMetrics()); searchIconCenterX = getIntent().getIntExtra(EXTRA_MENU_CENTER_X, 0); int interpolator = UI.isLollipop() ? android.R.interpolator.fast_out_slow_in : android.R.interpolator.accelerate_decelerate; int backInterpolator = UI.isLollipop() ? android.R.interpolator.linear_out_slow_in : android.R.interpolator.accelerate_decelerate; // translate icon to match the launching screen then animate back into position searchBackContainer.setTranslationX(searchBackDistanceX); searchBackContainer.animate().translationX(0f).setDuration(650L) .setInterpolator(AnimationUtils.loadInterpolator(this, interpolator)); if (UI.isLollipop()) { // transform from search icon to back icon AnimatedVectorDrawable searchToBack = (AnimatedVectorDrawable) ContextCompat.getDrawable(this, R.drawable.avd_search_to_back); searchBack.setImageDrawable(searchToBack); searchToBack.start(); } else { searchBack.setVisibility(View.INVISIBLE); searchBack.setImageResource(R.drawable.ic_arrow_back_padded); } // for some reason the animation doesn't always finish (leaving a part arrow!?) so after // the animation set a static drawable. Also animation callbacks weren't added until API23 // so using post delayed :( // TODO fix properly!! searchBack.postDelayed(new Runnable() { @Override public void run() { searchBack.setImageDrawable( ContextCompat.getDrawable(SearchActivity.this, R.drawable.ic_arrow_back_padded)); } }, 600); // fade in the other search chrome searchBackground.animate().alpha(1f).setDuration(300L) .setInterpolator(AnimationUtils.loadInterpolator(this, backInterpolator)); searchView.animate().alpha(1f).setStartDelay(400L).setDuration(400L) .setInterpolator(AnimationUtils.loadInterpolator(this, backInterpolator)) .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { searchView.requestFocus(); ImeUtils.showIme(searchView); } }); if (UI.isLollipop()) { // animate in a scrim over the content behind scrim.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @TargetApi(Build.VERSION_CODES.LOLLIPOP) @Override public boolean onPreDraw() { scrim.getViewTreeObserver().removeOnPreDrawListener(this); AnimatorSet showScrim = new AnimatorSet(); showScrim.playTogether( ViewAnimationUtils.createCircularReveal(scrim, searchIconCenterX, searchBackground.getBottom(), 0, (float) Math.hypot(searchBackDistanceX, scrim.getHeight() - searchBackground.getBottom())), ObjectAnimator.ofArgb(scrim, ViewUtils.BACKGROUND_COLOR, Color.TRANSPARENT, ContextCompat.getColor(SearchActivity.this, R.color.scrim))); showScrim.setDuration(400L); showScrim.setInterpolator( AnimationUtils.loadInterpolator(SearchActivity.this, backInterpolator)); showScrim.start(); return false; } }); } onNewIntent(getIntent()); } @Override protected void onNewIntent(Intent intent) { if (intent.hasExtra(SearchManager.QUERY)) { String query = intent.getStringExtra(SearchManager.QUERY); if (!TextUtils.isEmpty(query)) { searchView.setQuery(query, false); searchFor(query); } } } @Override public void onBackPressed() { if (UI.isLollipop()) { dismiss(); } else { super.onBackPressed(); } } @Override protected void onPause() { // needed to suppress the default window animation when closing the activity overridePendingTransition(0, 0); super.onPause(); } @OnClick({ R.id.scrim, R.id.searchback }) protected void dismiss() { int interpolator = UI.isLollipop() ? android.R.interpolator.fast_out_slow_in : android.R.interpolator.accelerate_decelerate; int backInterpolator = UI.isLollipop() ? android.R.interpolator.fast_out_linear_in : android.R.interpolator.accelerate_decelerate; // translate the icon to match position in the launching activity searchBackContainer.animate().translationX(searchBackDistanceX).setDuration(600L) .setInterpolator(AnimationUtils.loadInterpolator(this, interpolator)) .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { supportFinishAfterTransition(); } }).start(); if (UI.isLollipop()) { // transform from back icon to search icon AnimatedVectorDrawable backToSearch = (AnimatedVectorDrawable) ContextCompat.getDrawable(this, R.drawable.avd_back_to_search); searchBack.setImageDrawable(backToSearch); // clear the background else the touch ripple moves with the translation which looks bad searchBack.setBackground(null); backToSearch.start(); } // fade out the other search chrome searchView.animate().alpha(0f).setStartDelay(0L).setDuration(120L) .setInterpolator(AnimationUtils.loadInterpolator(this, backInterpolator)).setListener(null).start(); searchBackground.animate().alpha(0f).setStartDelay(300L).setDuration(160L) .setInterpolator(AnimationUtils.loadInterpolator(this, backInterpolator)).setListener(null).start(); if (UI.isLollipop()) { if (searchToolbar.getZ() != 0f) { searchToolbar.animate().z(0f).setDuration(600L) .setInterpolator(AnimationUtils.loadInterpolator(this, backInterpolator)).start(); } } // if we're showing search results, circular hide them if (UI.isLollipop() && resultsContainer.getHeight() > 0) { Animator closeResults = ViewAnimationUtils.createCircularReveal(resultsContainer, searchIconCenterX, 0, (float) Math.hypot(searchIconCenterX, resultsContainer.getHeight()), 0f); closeResults.setDuration(500L); closeResults.setInterpolator( AnimationUtils.loadInterpolator(SearchActivity.this, android.R.interpolator.fast_out_slow_in)); closeResults.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { resultsContainer.setVisibility(View.INVISIBLE); } }); closeResults.start(); } // fade out the scrim scrim.animate().alpha(0f).setDuration(400L) .setInterpolator(AnimationUtils.loadInterpolator(this, backInterpolator)).setListener(null).start(); } @OnClick(R.id.results_scrim) protected void hideSaveConfimation() { } private void setupSearchView() { SearchManager searchManager = (SearchManager) getSystemService(SEARCH_SERVICE); searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName())); // hint, inputType & ime options seem to be ignored from XML! Set in code searchView.setQueryHint(getString(R.string.search_hint)); searchView.setInputType(InputType.TYPE_TEXT_FLAG_CAP_WORDS); searchView.setImeOptions(searchView.getImeOptions() | EditorInfo.IME_ACTION_SEARCH | EditorInfo.IME_FLAG_NO_EXTRACT_UI | EditorInfo.IME_FLAG_NO_FULLSCREEN); searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String query) { searchFor(query); return true; } @Override public boolean onQueryTextChange(String query) { if (TextUtils.isEmpty(query)) { clearResults(); } return true; } }); } private void clearResults() { adapter.clear(); dataManager.clear(); if (UI.isLollipop()) { TransitionManager.beginDelayedTransition(container, auto); } results.setVisibility(View.GONE); progress.setVisibility(View.GONE); resultsScrim.setVisibility(View.GONE); setNoResultsVisibility(View.GONE); } private void setNoResultsVisibility(int visibility) { if (visibility == View.VISIBLE) { if (noResults == null) { noResults = (BaselineGridTextView) ((ViewStub) findViewById(R.id.stub_no_search_results)).inflate(); noResults.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { searchView.setQuery("", false); searchView.requestFocus(); ImeUtils.showIme(searchView); } }); } String message = String.format(getString(R .string.no_search_results), searchView.getQuery().toString()); SpannableStringBuilder ssb = new SpannableStringBuilder(message); ssb.setSpan(new StyleSpan(Typeface.ITALIC), message.indexOf('') + 1, message.length() - 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); noResults.setText(ssb); } if (noResults != null) { noResults.setVisibility(visibility); } } private void searchFor(String query) { clearResults(); progress.setVisibility(View.VISIBLE); ImeUtils.hideIme(searchView); searchView.clearFocus(); dataManager.searchFor(query); } private int gridScrollY = 0; private RecyclerView.OnScrollListener gridScroll = new RecyclerView.OnScrollListener() { @TargetApi(Build.VERSION_CODES.LOLLIPOP) @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { gridScrollY += dy; if (gridScrollY > 0 && searchToolbar.getTranslationZ() != appBarElevation) { searchToolbar .animate().translationZ(appBarElevation).setDuration(300L).setInterpolator(AnimationUtils .loadInterpolator(SearchActivity.this, android.R.interpolator.fast_out_slow_in)) .start(); } else if (gridScrollY == 0 && searchToolbar.getTranslationZ() != 0) { searchToolbar .animate().translationZ(0f).setDuration(300L).setInterpolator(AnimationUtils .loadInterpolator(SearchActivity.this, android.R.interpolator.fast_out_slow_in)) .start(); } } }; }