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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
      5  * in compliance with the License. You may obtain a copy of the License at
      6  *
      7  * http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the License
     10  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
     11  * or implied. See the License for the specific language governing permissions and limitations under
     12  * the License.
     13  */
     14 package com.example.android.leanback;
     15 
     16 import android.animation.Animator;
     17 import android.animation.AnimatorListenerAdapter;
     18 import android.animation.AnimatorSet;
     19 import android.animation.ObjectAnimator;
     20 import android.graphics.drawable.AnimationDrawable;
     21 import android.view.LayoutInflater;
     22 import android.view.View;
     23 import android.view.ViewGroup;
     24 import android.widget.ImageView;
     25 
     26 import androidx.leanback.app.OnboardingFragment;
     27 
     28 import java.util.ArrayList;
     29 
     30 public class OnboardingDemoFragment extends OnboardingFragment {
     31     private static final long ANIMATION_DURATION = 1000;
     32 
     33     private static final int[] CONTENT_BACKGROUNDS = {
     34             R.drawable.tv_bg,
     35             R.drawable.gallery_photo_6,
     36             R.drawable.gallery_photo_8
     37     };
     38 
     39     private static final int[] CONTENT_ANIMATIONS = {
     40             R.drawable.tv_content,
     41             android.R.drawable.stat_sys_download,
     42             android.R.drawable.ic_popup_sync
     43     };
     44 
     45     private String[] mTitles;
     46     private String[] mDescriptions;
     47 
     48     private View mBackgroundView;
     49     private View mContentView;
     50     private ImageView mContentBackgroundView;
     51     private ImageView mContentAnimationView;
     52 
     53     private Animator mContentAnimator;
     54 
     55     @SuppressWarnings("deprecation")
     56     @Override
     57     public void onAttach(android.app.Activity activity) {
     58         super.onAttach(activity);
     59         mTitles = getResources().getStringArray(R.array.onboarding_page_titles);
     60         mDescriptions = getResources().getStringArray(R.array.onboarding_page_descriptions);
     61         setLogoResourceId(R.drawable.ic_launcher);
     62     }
     63 
     64     @Override
     65     protected int getPageCount() {
     66         return mTitles.length;
     67     }
     68 
     69     @Override
     70     protected CharSequence getPageTitle(int i) {
     71         return mTitles[i];
     72     }
     73 
     74     @Override
     75     protected CharSequence getPageDescription(int i) {
     76         return mDescriptions[i];
     77     }
     78 
     79     @Override
     80     protected View onCreateBackgroundView(LayoutInflater layoutInflater, ViewGroup viewGroup) {
     81         mBackgroundView = layoutInflater.inflate(R.layout.onboarding_image, viewGroup, false);
     82         return mBackgroundView;
     83     }
     84 
     85     @Override
     86     protected View onCreateContentView(LayoutInflater layoutInflater, ViewGroup viewGroup) {
     87         mContentView = layoutInflater.inflate(R.layout.onboarding_content, viewGroup, false);
     88         mContentBackgroundView = (ImageView) mContentView.findViewById(R.id.background_image);
     89         mContentAnimationView = (ImageView) mContentView.findViewById(R.id.animation_image);
     90         return mContentView;
     91     }
     92 
     93     @Override
     94     protected View onCreateForegroundView(LayoutInflater layoutInflater, ViewGroup viewGroup) {
     95         return null;
     96     }
     97 
     98     @Override
     99     protected Animator onCreateEnterAnimation() {
    100         ArrayList<Animator> animators = new ArrayList<>();
    101         animators.add(createFadeInAnimator(mBackgroundView));
    102         mContentBackgroundView.setImageResource(CONTENT_BACKGROUNDS[0]);
    103         mContentAnimationView.setImageResource(CONTENT_ANIMATIONS[0]);
    104         mContentAnimator = createFadeInAnimator(mContentView);
    105         animators.add(mContentAnimator);
    106         AnimatorSet set = new AnimatorSet();
    107         set.playTogether(animators);
    108         set.addListener(new AnimatorListenerAdapter() {
    109             @Override
    110             public void onAnimationEnd(Animator animation) {
    111                 ((AnimationDrawable) mContentAnimationView.getDrawable()).start();
    112             }
    113         });
    114         return set;
    115     }
    116 
    117     @Override
    118     protected void onPageChanged(final int newPage, int previousPage) {
    119         if (mContentAnimator != null) {
    120             mContentAnimator.cancel();
    121         }
    122         ((AnimationDrawable) mContentAnimationView.getDrawable()).stop();
    123         ArrayList<Animator> animators = new ArrayList<>();
    124         Animator fadeOut = createFadeOutAnimator(mContentView);
    125         fadeOut.addListener(new AnimatorListenerAdapter() {
    126             @Override
    127             public void onAnimationEnd(Animator animation) {
    128                 mContentBackgroundView.setImageResource(CONTENT_BACKGROUNDS[newPage]);
    129                 mContentAnimationView.setImageResource(CONTENT_ANIMATIONS[newPage]);
    130             }
    131         });
    132         Animator fadeIn = createFadeInAnimator(mContentView);
    133         fadeIn.addListener(new AnimatorListenerAdapter() {
    134             @Override
    135             public void onAnimationEnd(Animator animation) {
    136                 ((AnimationDrawable) mContentAnimationView.getDrawable()).start();
    137             }
    138         });
    139         AnimatorSet set = new AnimatorSet();
    140         set.playSequentially(fadeOut, fadeIn);
    141         set.start();
    142         mContentAnimator = set;
    143     }
    144 
    145     private Animator createFadeInAnimator(View view) {
    146         return ObjectAnimator.ofFloat(view, View.ALPHA, 0.0f, 1.0f).setDuration(ANIMATION_DURATION);
    147     }
    148 
    149     private Animator createFadeOutAnimator(View view) {
    150         return ObjectAnimator.ofFloat(view, View.ALPHA, 1.0f, 0.0f).setDuration(ANIMATION_DURATION);
    151     }
    152 
    153     @Override
    154     protected void onFinishFragment() {
    155         getActivity().finish();
    156     }
    157 }
    158