1 /* 2 * Copyright (C) 2010 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.apis.animation; 18 19 // Need the following import to get access to the app resources, since this 20 // class is in a sub-package. 21 import android.animation.Animator; 22 import android.animation.ObjectAnimator; 23 import android.widget.CheckBox; 24 import android.widget.TextView; 25 import com.example.android.apis.R; 26 27 import java.util.ArrayList; 28 29 import android.animation.ValueAnimator; 30 import android.animation.AnimatorSet; 31 import android.app.Activity; 32 import android.content.Context; 33 import android.graphics.Canvas; 34 import android.graphics.Paint; 35 import android.graphics.RadialGradient; 36 import android.graphics.Shader; 37 import android.graphics.drawable.ShapeDrawable; 38 import android.graphics.drawable.shapes.OvalShape; 39 import android.os.Bundle; 40 import android.view.View; 41 import android.view.animation.AccelerateInterpolator; 42 import android.widget.Button; 43 import android.widget.LinearLayout; 44 45 /** 46 * This demo shows how the AnimatorListener events work. 47 */ 48 public class AnimatorEvents extends Activity { 49 50 TextView startText, repeatText, cancelText, endText; 51 TextView startTextAnimator, repeatTextAnimator, cancelTextAnimator, endTextAnimator; 52 53 @Override onCreate(Bundle savedInstanceState)54 public void onCreate(Bundle savedInstanceState) { 55 super.onCreate(savedInstanceState); 56 setContentView(R.layout.animator_events); 57 LinearLayout container = (LinearLayout) findViewById(R.id.container); 58 final MyAnimationView animView = new MyAnimationView(this); 59 container.addView(animView); 60 startText = (TextView) findViewById(R.id.startText); 61 startText.setAlpha(.5f); 62 repeatText = (TextView) findViewById(R.id.repeatText); 63 repeatText.setAlpha(.5f); 64 cancelText = (TextView) findViewById(R.id.cancelText); 65 cancelText.setAlpha(.5f); 66 endText = (TextView) findViewById(R.id.endText); 67 endText.setAlpha(.5f); 68 startTextAnimator = (TextView) findViewById(R.id.startTextAnimator); 69 startTextAnimator.setAlpha(.5f); 70 repeatTextAnimator = (TextView) findViewById(R.id.repeatTextAnimator); 71 repeatTextAnimator.setAlpha(.5f); 72 cancelTextAnimator = (TextView) findViewById(R.id.cancelTextAnimator); 73 cancelTextAnimator.setAlpha(.5f); 74 endTextAnimator = (TextView) findViewById(R.id.endTextAnimator); 75 endTextAnimator.setAlpha(.5f); 76 final CheckBox endCB = (CheckBox) findViewById(R.id.endCB); 77 78 79 Button starter = (Button) findViewById(R.id.startButton); 80 starter.setOnClickListener(new View.OnClickListener() { 81 82 public void onClick(View v) { 83 animView.startAnimation(endCB.isChecked()); 84 } 85 }); 86 87 Button canceler = (Button) findViewById(R.id.cancelButton); 88 canceler.setOnClickListener(new View.OnClickListener() { 89 90 public void onClick(View v) { 91 animView.cancelAnimation(); 92 } 93 }); 94 95 Button ender = (Button) findViewById(R.id.endButton); 96 ender.setOnClickListener(new View.OnClickListener() { 97 98 public void onClick(View v) { 99 animView.endAnimation(); 100 } 101 }); 102 103 } 104 105 public class MyAnimationView extends View implements Animator.AnimatorListener, 106 ValueAnimator.AnimatorUpdateListener { 107 108 public final ArrayList<ShapeHolder> balls = new ArrayList<ShapeHolder>(); 109 Animator animation; 110 ShapeHolder ball = null; 111 boolean endImmediately = false; 112 MyAnimationView(Context context)113 public MyAnimationView(Context context) { 114 super(context); 115 ball = createBall(25, 25); 116 } 117 createAnimation()118 private void createAnimation() { 119 if (animation == null) { 120 ObjectAnimator yAnim = ObjectAnimator.ofFloat(ball, "y", 121 ball.getY(), getHeight() - 50f).setDuration(1500); 122 yAnim.setRepeatCount(0); 123 yAnim.setRepeatMode(ValueAnimator.REVERSE); 124 yAnim.setInterpolator(new AccelerateInterpolator(2f)); 125 yAnim.addUpdateListener(this); 126 yAnim.addListener(this); 127 128 ObjectAnimator xAnim = ObjectAnimator.ofFloat(ball, "x", 129 ball.getX(), ball.getX() + 300).setDuration(1000); 130 xAnim.setStartDelay(0); 131 xAnim.setRepeatCount(0); 132 xAnim.setRepeatMode(ValueAnimator.REVERSE); 133 xAnim.setInterpolator(new AccelerateInterpolator(2f)); 134 135 ObjectAnimator alphaAnim = ObjectAnimator.ofFloat(ball, "alpha", 1f, .5f). 136 setDuration(1000); 137 AnimatorSet alphaSeq = new AnimatorSet(); 138 alphaSeq.play(alphaAnim); 139 140 animation = new AnimatorSet(); 141 ((AnimatorSet) animation).playTogether(yAnim, xAnim); 142 animation.addListener(this); 143 } 144 } 145 startAnimation(boolean endImmediately)146 public void startAnimation(boolean endImmediately) { 147 this.endImmediately = endImmediately; 148 startText.setAlpha(.5f); 149 repeatText.setAlpha(.5f); 150 cancelText.setAlpha(.5f); 151 endText.setAlpha(.5f); 152 startTextAnimator.setAlpha(.5f); 153 repeatTextAnimator.setAlpha(.5f); 154 cancelTextAnimator.setAlpha(.5f); 155 endTextAnimator.setAlpha(.5f); 156 createAnimation(); 157 animation.start(); 158 } 159 cancelAnimation()160 public void cancelAnimation() { 161 createAnimation(); 162 animation.cancel(); 163 } 164 endAnimation()165 public void endAnimation() { 166 createAnimation(); 167 animation.end(); 168 } 169 createBall(float x, float y)170 private ShapeHolder createBall(float x, float y) { 171 OvalShape circle = new OvalShape(); 172 circle.resize(50f, 50f); 173 ShapeDrawable drawable = new ShapeDrawable(circle); 174 ShapeHolder shapeHolder = new ShapeHolder(drawable); 175 shapeHolder.setX(x - 25f); 176 shapeHolder.setY(y - 25f); 177 int red = (int)(Math.random() * 255); 178 int green = (int)(Math.random() * 255); 179 int blue = (int)(Math.random() * 255); 180 int color = 0xff000000 | red << 16 | green << 8 | blue; 181 Paint paint = drawable.getPaint(); //new Paint(Paint.ANTI_ALIAS_FLAG); 182 int darkColor = 0xff000000 | red/4 << 16 | green/4 << 8 | blue/4; 183 RadialGradient gradient = new RadialGradient(37.5f, 12.5f, 184 50f, color, darkColor, Shader.TileMode.CLAMP); 185 paint.setShader(gradient); 186 shapeHolder.setPaint(paint); 187 return shapeHolder; 188 } 189 190 @Override onDraw(Canvas canvas)191 protected void onDraw(Canvas canvas) { 192 canvas.save(); 193 canvas.translate(ball.getX(), ball.getY()); 194 ball.getShape().draw(canvas); 195 canvas.restore(); 196 } 197 onAnimationUpdate(ValueAnimator animation)198 public void onAnimationUpdate(ValueAnimator animation) { 199 invalidate(); 200 } 201 onAnimationStart(Animator animation)202 public void onAnimationStart(Animator animation) { 203 if (animation instanceof AnimatorSet) { 204 startText.setAlpha(1f); 205 } else { 206 startTextAnimator.setAlpha(1f); 207 } 208 if (endImmediately) { 209 animation.end(); 210 } 211 } 212 onAnimationEnd(Animator animation)213 public void onAnimationEnd(Animator animation) { 214 if (animation instanceof AnimatorSet) { 215 endText.setAlpha(1f); 216 } else { 217 endTextAnimator.setAlpha(1f); 218 } 219 } 220 onAnimationCancel(Animator animation)221 public void onAnimationCancel(Animator animation) { 222 if (animation instanceof AnimatorSet) { 223 cancelText.setAlpha(1f); 224 } else { 225 cancelTextAnimator.setAlpha(1f); 226 } 227 } 228 onAnimationRepeat(Animator animation)229 public void onAnimationRepeat(Animator animation) { 230 if (animation instanceof AnimatorSet) { 231 repeatText.setAlpha(1f); 232 } else { 233 repeatTextAnimator.setAlpha(1f); 234 } 235 } 236 } 237 }