Java tutorial
/* * Copyright (C) 2014 Fastboot Mobile, LLC. * * 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 com.fastbootmobile.encore.app; import android.annotation.TargetApi; import android.app.SharedElementCallback; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.FragmentManager; import android.support.v7.app.ActionBar; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import com.fastbootmobile.encore.app.fragments.AlbumViewFragment; import com.fastbootmobile.encore.app.fragments.PlaylistChooserFragment; import com.fastbootmobile.encore.framework.PlaybackProxy; import com.fastbootmobile.encore.model.Album; import com.fastbootmobile.encore.model.Artist; import com.fastbootmobile.encore.providers.ProviderAggregator; import com.fastbootmobile.encore.providers.ProviderIdentifier; import com.fastbootmobile.encore.utils.Utils; import java.util.List; import java.util.Map; /** * Activity for viewing an album details through * {@link com.fastbootmobile.encore.app.fragments.AlbumViewFragment} */ public class AlbumActivity extends AppActivity { private static final String TAG_FRAGMENT = "fragment_inner"; public static final String EXTRA_ALBUM = "album"; public static final String EXTRA_PROVIDER = "provider"; public static final String EXTRA_BACKGROUND_COLOR = "background_color"; public static final String BITMAP_ALBUM_HERO = "album_hero"; private static final String EXTRA_RESTORE_INTENT = "restore_intent"; public static final int BACK_DELAY = 300; private AlbumViewFragment mActiveFragment; private Bundle mInitialIntent; private Bitmap mHero; private Handler mHandler; private Toolbar mToolbar; private boolean mIsEntering; /** * Creates a proper intent to open this activity * @param context The original context * @param hero The hero image bitmap * @param albumRef The reference of the album to view * @param backColor The back color of the header bar * @return An intent to open this activity */ public static Intent craftIntent(Context context, Bitmap hero, String albumRef, ProviderIdentifier provider, int backColor) { Intent intent = new Intent(context, AlbumActivity.class); intent.putExtra(EXTRA_ALBUM, albumRef); intent.putExtra(EXTRA_PROVIDER, provider.serialize()); intent.putExtra(EXTRA_BACKGROUND_COLOR, backColor); Utils.queueBitmap(BITMAP_ALBUM_HERO, hero); return intent; } @TargetApi(Build.VERSION_CODES.LOLLIPOP) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_artist); mHandler = new Handler(); // Load or restore the fragment FragmentManager fm = getSupportFragmentManager(); mActiveFragment = (AlbumViewFragment) fm.findFragmentByTag(TAG_FRAGMENT); if (savedInstanceState == null) { mHero = Utils.dequeueBitmap(BITMAP_ALBUM_HERO); mInitialIntent = getIntent().getExtras(); } else { mHero = Utils.dequeueBitmap(BITMAP_ALBUM_HERO); mInitialIntent = savedInstanceState.getBundle(EXTRA_RESTORE_INTENT); } if (mActiveFragment == null) { mActiveFragment = new AlbumViewFragment(); fm.beginTransaction().add(R.id.container, mActiveFragment, TAG_FRAGMENT).commit(); } mActiveFragment.setArguments(mHero, mInitialIntent); // Remove the activity title as we don't want it here mToolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(mToolbar); final ActionBar actionBar = getSupportActionBar(); if (actionBar != null) { actionBar.setDisplayHomeAsUpEnabled(true); actionBar.setHomeButtonEnabled(true); actionBar.setTitle(""); } mIsEntering = true; if (Utils.hasLollipop()) { setEnterSharedElementCallback(new SharedElementCallback() { @Override public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) { View imageHeader = mActiveFragment.getHeroImageView(); if (imageHeader != null) { sharedElements.put("itemImage", imageHeader); } View albumName = mActiveFragment.findViewById(R.id.tvAlbumName); if (albumName != null) { final int cx = albumName.getMeasuredWidth() / 4; final int cy = albumName.getMeasuredHeight() / 2; final int duration = getResources().getInteger(android.R.integer.config_mediumAnimTime); final int radius = Utils.getEnclosingCircleRadius(albumName, cx, cy); try { if (mIsEntering) { albumName.setVisibility(View.INVISIBLE); Utils.animateCircleReveal(albumName, cx, cy, 0, radius, duration, 300); } else { albumName.setVisibility(View.VISIBLE); Utils.animateCircleReveal(albumName, cx, cy, radius, 0, duration, 0); } } catch (IllegalStateException ignore) { // Animation was cancelled before animation mapping } } } }); } getWindow().getDecorView() .setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putBundle(EXTRA_RESTORE_INTENT, mInitialIntent); Utils.queueBitmap(BITMAP_ALBUM_HERO, mHero); } @Override public boolean onCreateOptionsMenu(final Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.album, menu); // Keep in tune with the XML! final ProviderAggregator aggregator = ProviderAggregator.getDefault(); final Runnable updateMenuArtist = new Runnable() { @Override public void run() { String artistRef = mActiveFragment.getArtist(); MenuItem item = menu.getItem(2); if (artistRef != null) { final Artist artist = aggregator.retrieveArtist(artistRef, mActiveFragment.getAlbum().getProvider()); if (artist != null) { item.setTitle(getString(R.string.more_from, artist.getName())); item.setVisible(true); } } else { // We don't have the tracks for that album yet, try again. mHandler.postDelayed(this, 1000); item.setVisible(false); } } }; updateMenuArtist.run(); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.menu_add_to_queue) { Album album = mActiveFragment.getAlbum(); if (album != null && album.isLoaded()) { PlaybackProxy.queueAlbum(album, false); } else { Utils.shortToast(this, R.string.toast_album_not_loaded_yet); } return true; } else if (id == R.id.menu_add_to_playlist) { Album album = mActiveFragment.getAlbum(); if (album != null && album.isLoaded()) { PlaylistChooserFragment fragment = PlaylistChooserFragment.newInstance(album); fragment.show(getSupportFragmentManager(), album.getRef()); } else { Utils.shortToast(this, R.string.toast_album_not_loaded_yet); } } else if (id == R.id.menu_more_from_artist) { String artistRef = mActiveFragment.getArtist(); Intent intent = ArtistActivity.craftIntent(this, null, artistRef, mActiveFragment.getAlbum().getProvider(), getResources().getColor(R.color.default_album_art_background)); startActivity(intent); } else if (id == android.R.id.home) { supportFinishAfterTransition(); return true; } return super.onOptionsItemSelected(item); } @Override public void onBackPressed() { mIsEntering = false; if (Utils.hasLollipop()) { mActiveFragment.notifyReturnTransition(); } super.onBackPressed(); } }