1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.example.android.toongame; 18 19 import android.animation.Animator; 20 import android.animation.AnimatorListenerAdapter; 21 import android.animation.AnimatorSet; 22 import android.animation.ObjectAnimator; 23 import android.animation.PropertyValuesHolder; 24 import android.animation.ValueAnimator; 25 import android.app.Activity; 26 import android.content.Intent; 27 import android.graphics.Color; 28 import android.os.Bundle; 29 import android.view.MotionEvent; 30 import android.view.View; 31 import android.view.View.OnTouchListener; 32 import android.view.ViewGroup; 33 import android.view.ViewTreeObserver; 34 import android.view.animation.AccelerateInterpolator; 35 import android.view.animation.DecelerateInterpolator; 36 import android.view.animation.LinearInterpolator; 37 import android.widget.Button; 38 39 /** 40 * This application shows various cartoon animation techniques in the context of 41 * a larger application, to show how such animations might be used to create a more 42 * interactive, fun, and engaging experience. 43 * 44 * This main activity launches a sub-activity when the Play button is clicked. The 45 * main action in this manager activity is bouncing the Play button in, randomly 46 * bouncing it while waiting for input, and animating its press and click behaviors 47 * when the user interacts with it. 48 * 49 * Watch the associated video for this demo on the DevBytes channel of developer.android.com 50 * or on the DevBytes playlist in the androiddevelopers channel on YouTube at 51 * https://www.youtube.com/playlist?list=PLWz5rJ2EKKc_XOgcRukSoKKjewFJZrKV0. 52 */ 53 public class ToonGame extends Activity { 54 55 Button mStarter; 56 ViewGroup mContainer; 57 private static final AccelerateInterpolator sAccelerator = new AccelerateInterpolator(); 58 private static final DecelerateInterpolator sDecelerator = new DecelerateInterpolator(); 59 private static final LinearInterpolator sLinearInterpolator = new LinearInterpolator(); 60 static long SHORT_DURATION = 100; 61 static long MEDIUM_DURATION = 200; 62 static long REGULAR_DURATION = 300; 63 static long LONG_DURATION = 500; 64 65 private static float sDurationScale = 1f; 66 67 @Override onCreate(Bundle savedInstanceState)68 protected void onCreate(Bundle savedInstanceState) { 69 super.onCreate(savedInstanceState); 70 overridePendingTransition(0, 0); 71 setContentView(R.layout.activity_toon_game); 72 73 mStarter = (Button) findViewById(R.id.startButton); 74 mContainer = (ViewGroup) findViewById(R.id.container); 75 mStarter.setOnTouchListener(funButtonListener); 76 mStarter.animate().setDuration(100); 77 78 } 79 80 @Override onResume()81 protected void onResume() { 82 super.onResume(); 83 mContainer.setScaleX(1); 84 mContainer.setScaleY(1); 85 mContainer.setAlpha(1); 86 mStarter.setVisibility(View.INVISIBLE); 87 mContainer.getViewTreeObserver().addOnPreDrawListener(mOnPreDrawListener); 88 } 89 90 @Override onPause()91 protected void onPause() { 92 super.onPause(); 93 mStarter.removeCallbacks(mSquishRunnable); 94 } 95 96 private OnTouchListener funButtonListener = new OnTouchListener() { 97 98 @Override 99 public boolean onTouch(View v, MotionEvent event) { 100 switch (event.getAction()) { 101 case MotionEvent.ACTION_DOWN: 102 mStarter.animate().scaleX(.8f).scaleY(.8f).setInterpolator(sDecelerator); 103 mStarter.setTextColor(Color.CYAN); 104 mStarter.removeCallbacks(mSquishRunnable); 105 mStarter.setPressed(true); 106 break; 107 case MotionEvent.ACTION_MOVE: 108 float x = event.getX(); 109 float y = event.getY(); 110 boolean isInside = (x > 0 && x < mStarter.getWidth() && 111 y > 0 && y < mStarter.getHeight()); 112 if (mStarter.isPressed() != isInside) { 113 mStarter.setPressed(isInside); 114 } 115 break; 116 case MotionEvent.ACTION_UP: 117 if (mStarter.isPressed()) { 118 mStarter.performClick(); 119 mStarter.setPressed(false); 120 } else { 121 mStarter.animate().scaleX(1).scaleY(1).setInterpolator(sAccelerator); 122 } 123 mStarter.setTextColor(Color.BLUE); 124 break; 125 } 126 return true; 127 } 128 }; 129 130 private Runnable mSquishRunnable = new Runnable() { 131 public void run() { 132 squishyBounce(mStarter, 0, 133 mContainer.getHeight() - mStarter.getTop() - mStarter.getHeight(), 134 0, .5f, 1.5f); 135 } 136 }; 137 play(View view)138 public void play(View view) { 139 mContainer.animate().scaleX(5).scaleY(5).alpha(0).setDuration(LONG_DURATION). 140 setInterpolator(sLinearInterpolator). 141 withEndAction(new Runnable() { 142 @Override 143 public void run() { 144 mStarter.postOnAnimation(new Runnable() { 145 public void run() { 146 Intent intent = new Intent(ToonGame.this, 147 PlayerSetupActivity.class); 148 startActivity(intent); 149 overridePendingTransition(0, 0); 150 } 151 }); 152 } 153 }); 154 view.removeCallbacks(mSquishRunnable); 155 } 156 157 private ViewTreeObserver.OnPreDrawListener mOnPreDrawListener = 158 new ViewTreeObserver.OnPreDrawListener() { 159 160 @Override 161 public boolean onPreDraw() { 162 mContainer.getViewTreeObserver().removeOnPreDrawListener(this); 163 mContainer.postDelayed(new Runnable() { 164 public void run() { 165 // Drop in the button from off the top of the screen 166 mStarter.setVisibility(View.VISIBLE); 167 mStarter.setY(-mStarter.getHeight()); 168 squishyBounce(mStarter, 169 -(mStarter.getTop() + mStarter.getHeight()), 170 mContainer.getHeight() - mStarter.getTop() - 171 mStarter.getHeight(), 172 0, .5f, 1.5f); 173 } 174 }, 500); 175 return true; 176 } 177 }; 178 squishyBounce(final View view, final float startTY, final float bottomTY, final float endTY, final float squash, final float stretch)179 private void squishyBounce(final View view, final float startTY, final float bottomTY, 180 final float endTY, final float squash, final float stretch) { 181 view.setPivotX(view.getWidth() / 2); 182 view.setPivotY(view.getHeight()); 183 PropertyValuesHolder pvhTY = PropertyValuesHolder.ofFloat(View.TRANSLATION_Y, 184 startTY, bottomTY); 185 PropertyValuesHolder pvhSX = PropertyValuesHolder.ofFloat(View.SCALE_X, .7f); 186 PropertyValuesHolder pvhSY = PropertyValuesHolder.ofFloat(View.SCALE_Y, 1.2f); 187 ObjectAnimator downAnim = ObjectAnimator.ofPropertyValuesHolder(view, pvhTY, pvhSX, pvhSY); 188 downAnim.setInterpolator(sAccelerator); 189 190 pvhTY = PropertyValuesHolder.ofFloat(View.TRANSLATION_Y, bottomTY, endTY); 191 pvhSX = PropertyValuesHolder.ofFloat(View.SCALE_X, 1); 192 pvhSY = PropertyValuesHolder.ofFloat(View.SCALE_Y, 1); 193 ObjectAnimator upAnim = ObjectAnimator.ofPropertyValuesHolder(view, pvhTY, pvhSX, pvhSY); 194 upAnim.setInterpolator(sDecelerator); 195 196 pvhSX = PropertyValuesHolder.ofFloat(View.SCALE_X, stretch); 197 pvhSY = PropertyValuesHolder.ofFloat(View.SCALE_Y, squash); 198 ObjectAnimator stretchAnim = ObjectAnimator.ofPropertyValuesHolder(view, pvhSX, pvhSY); 199 stretchAnim.setRepeatCount(1); 200 stretchAnim.setRepeatMode(ValueAnimator.REVERSE); 201 stretchAnim.setInterpolator(sDecelerator); 202 203 AnimatorSet set = new AnimatorSet(); 204 set.playSequentially(downAnim, stretchAnim, upAnim); 205 set.setDuration(getDuration(SHORT_DURATION)); 206 set.start(); 207 set.addListener(new AnimatorListenerAdapter() { 208 public void onAnimationEnd(Animator animation) { 209 view.postDelayed(mSquishRunnable, (long) (500 + Math.random() * 2000)); 210 } 211 }); 212 } 213 getDuration(long baseDuration)214 public static long getDuration(long baseDuration) { 215 return (long) (baseDuration * sDurationScale); 216 } 217 218 219 } 220