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.animation.Animator; 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 android.view.ViewAnimationUtils; import android.view.animation.DecelerateInterpolator; import com.fastbootmobile.encore.app.fragments.ArtistFragment; import com.fastbootmobile.encore.providers.ProviderIdentifier; import com.fastbootmobile.encore.utils.Utils; import java.util.List; import java.util.Map; /** * Activity to view an Artist tracks, similar, etc. through * an {@link com.fastbootmobile.encore.app.fragments.ArtistFragment} */ public class ArtistActivity extends AppActivity { private static final String TAG = "ArtistActivity"; private static final String TAG_FRAGMENT = "fragment_inner"; public static final String EXTRA_ARTIST = "artist"; public static final String EXTRA_PROVIDER = "provider"; public static final String EXTRA_BACKGROUND_COLOR = "background_color"; public static final String BITMAP_ARTIST_HERO = "artist_hero"; private static final String EXTRA_RESTORE_INTENT = "restore_intent"; public static final int BACK_DELAY = 400; private Bundle mInitialIntent; private Bitmap mHero; private ArtistFragment mActiveFragment; private Handler mHandler; private Toolbar mToolbar; private boolean mIsEntering; /** * Creates a proper intent to open this activity * * @param ctx The current context * @param hero The hero (artist image) bitmap * @param artistRef The reference of the artist * @param provider The provider of the artist * @param color The back color of the header bar * @return An intent that will open this activity */ public static Intent craftIntent(Context ctx, Bitmap hero, String artistRef, ProviderIdentifier provider, int color) { Intent intent = new Intent(ctx, ArtistActivity.class); intent.putExtra(ArtistActivity.EXTRA_ARTIST, artistRef); intent.putExtra(ArtistActivity.EXTRA_PROVIDER, provider); intent.putExtra(ArtistActivity.EXTRA_BACKGROUND_COLOR, color); Utils.queueBitmap(ArtistActivity.BITMAP_ARTIST_HERO, hero); return intent; } @Override @TargetApi(Build.VERSION_CODES.LOLLIPOP) protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_artist); mHandler = new Handler(); FragmentManager fm = getSupportFragmentManager(); mActiveFragment = (ArtistFragment) fm.findFragmentByTag(TAG_FRAGMENT); if (savedInstanceState == null) { mHero = Utils.dequeueBitmap(BITMAP_ARTIST_HERO); mInitialIntent = getIntent().getExtras(); } else { mHero = Utils.dequeueBitmap(BITMAP_ARTIST_HERO); mInitialIntent = savedInstanceState.getBundle(EXTRA_RESTORE_INTENT); } if (mActiveFragment == null) { mActiveFragment = new ArtistFragment(); 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 fab = mActiveFragment.findViewById(R.id.fabPlay); fab.setVisibility(View.VISIBLE); // get the center for the clipping circle int cx = fab.getMeasuredWidth() / 2; int cy = fab.getMeasuredHeight() / 2; // get the final radius for the clipping circle final int finalRadius = fab.getWidth(); // create and start the animator for this view // (the start radius is zero) Animator anim; if (mIsEntering) { anim = ViewAnimationUtils.createCircularReveal(fab, cx, cy, 0, finalRadius); } else { anim = ViewAnimationUtils.createCircularReveal(fab, cx, cy, finalRadius, 0); } anim.setInterpolator(new DecelerateInterpolator()); anim.start(); fab.setTranslationX(-fab.getMeasuredWidth() / 4.0f); fab.setTranslationY(-fab.getMeasuredHeight() / 4.0f); fab.animate().translationX(0.0f).translationY(0.0f) .setDuration(getResources().getInteger(android.R.integer.config_shortAnimTime)) .setInterpolator(new DecelerateInterpolator()).start(); final View artistName = mActiveFragment.findViewById(R.id.tvArtist); if (artistName != null) { cx = artistName.getMeasuredWidth() / 4; cy = artistName.getMeasuredHeight() / 2; final int duration = getResources().getInteger(android.R.integer.config_mediumAnimTime); final int radius = Utils.getEnclosingCircleRadius(artistName, cx, cy); if (mIsEntering) { artistName.setVisibility(View.INVISIBLE); Utils.animateCircleReveal(artistName, cx, cy, 0, radius, duration, 300); } else { artistName.setVisibility(View.VISIBLE); Utils.animateCircleReveal(artistName, cx, cy, radius, 0, duration, 0); } } } }); } 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_ARTIST_HERO, mHero); } @Override public boolean onCreateOptionsMenu(final Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. 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 == android.R.id.home) { onBackPressed(); return true; } return super.onOptionsItemSelected(item); } @Override public void onBackPressed() { if (Utils.hasLollipop()) { mIsEntering = false; mActiveFragment.scrollToTop(); mActiveFragment.notifyClosing(); } super.onBackPressed(); } }