| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.apis.animation; |
| |
| // Need the following import to get access to the app resources, since this |
| // class is in a sub-package. |
| import android.animation.*; |
| import android.view.animation.AccelerateInterpolator; |
| import com.example.android.apis.R; |
| |
| import java.util.ArrayList; |
| |
| import android.app.Activity; |
| import android.content.Context; |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.graphics.RadialGradient; |
| import android.graphics.Shader; |
| import android.graphics.drawable.ShapeDrawable; |
| import android.graphics.drawable.shapes.OvalShape; |
| import android.os.Bundle; |
| import android.view.View; |
| import android.view.animation.BounceInterpolator; |
| import android.widget.Button; |
| import android.widget.LinearLayout; |
| |
| /** |
| * This application demonstrates the seeking capability of ValueAnimator. The SeekBar in the |
| * UI allows you to set the position of the animation. Pressing the Run button will play from |
| * the current position of the animation. |
| */ |
| public class MultiPropertyAnimation extends Activity { |
| |
| private static final int DURATION = 1500; |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(R.layout.animation_multi_property); |
| LinearLayout container = (LinearLayout) findViewById(R.id.container); |
| final MyAnimationView animView = new MyAnimationView(this); |
| container.addView(animView); |
| |
| Button starter = (Button) findViewById(R.id.startButton); |
| starter.setOnClickListener(new View.OnClickListener() { |
| |
| public void onClick(View v) { |
| animView.startAnimation(); |
| } |
| }); |
| |
| } |
| |
| public class MyAnimationView extends View implements ValueAnimator.AnimatorUpdateListener { |
| |
| private static final float BALL_SIZE = 100f; |
| |
| public final ArrayList<ShapeHolder> balls = new ArrayList<ShapeHolder>(); |
| AnimatorSet animation = null; |
| Animator bounceAnim = null; |
| ShapeHolder ball = null; |
| |
| public MyAnimationView(Context context) { |
| super(context); |
| addBall(50, 0); |
| addBall(150, 0); |
| addBall(250, 0); |
| addBall(350, 0); |
| } |
| |
| private void createAnimation() { |
| if (bounceAnim == null) { |
| ShapeHolder ball; |
| ball = balls.get(0); |
| ObjectAnimator yBouncer = ObjectAnimator.ofFloat(ball, "y", |
| ball.getY(), getHeight() - BALL_SIZE).setDuration(DURATION); |
| yBouncer.setInterpolator(new BounceInterpolator()); |
| yBouncer.addUpdateListener(this); |
| |
| ball = balls.get(1); |
| PropertyValuesHolder pvhY = PropertyValuesHolder.ofFloat("y", ball.getY(), |
| getHeight() - BALL_SIZE); |
| PropertyValuesHolder pvhAlpha = PropertyValuesHolder.ofFloat("alpha", 1.0f, 0f); |
| ObjectAnimator yAlphaBouncer = ObjectAnimator.ofPropertyValuesHolder(ball, |
| pvhY, pvhAlpha).setDuration(DURATION/2); |
| yAlphaBouncer.setInterpolator(new AccelerateInterpolator()); |
| yAlphaBouncer.setRepeatCount(1); |
| yAlphaBouncer.setRepeatMode(ValueAnimator.REVERSE); |
| |
| |
| ball = balls.get(2); |
| PropertyValuesHolder pvhW = PropertyValuesHolder.ofFloat("width", ball.getWidth(), |
| ball.getWidth() * 2); |
| PropertyValuesHolder pvhH = PropertyValuesHolder.ofFloat("height", ball.getHeight(), |
| ball.getHeight() * 2); |
| PropertyValuesHolder pvTX = PropertyValuesHolder.ofFloat("x", ball.getX(), |
| ball.getX() - BALL_SIZE/2f); |
| PropertyValuesHolder pvTY = PropertyValuesHolder.ofFloat("y", ball.getY(), |
| ball.getY() - BALL_SIZE/2f); |
| ObjectAnimator whxyBouncer = ObjectAnimator.ofPropertyValuesHolder(ball, pvhW, pvhH, |
| pvTX, pvTY).setDuration(DURATION/2); |
| whxyBouncer.setRepeatCount(1); |
| whxyBouncer.setRepeatMode(ValueAnimator.REVERSE); |
| |
| ball = balls.get(3); |
| pvhY = PropertyValuesHolder.ofFloat("y", ball.getY(), getHeight() - BALL_SIZE); |
| float ballX = ball.getX(); |
| Keyframe kf0 = Keyframe.ofFloat(0f, ballX); |
| Keyframe kf1 = Keyframe.ofFloat(.5f, ballX + 100f); |
| Keyframe kf2 = Keyframe.ofFloat(1f, ballX + 50f); |
| PropertyValuesHolder pvhX = PropertyValuesHolder.ofKeyframe("x", kf0, kf1, kf2); |
| ObjectAnimator yxBouncer = ObjectAnimator.ofPropertyValuesHolder(ball, pvhY, |
| pvhX).setDuration(DURATION/2); |
| yxBouncer.setRepeatCount(1); |
| yxBouncer.setRepeatMode(ValueAnimator.REVERSE); |
| |
| |
| bounceAnim = new AnimatorSet(); |
| ((AnimatorSet)bounceAnim).playTogether(yBouncer, yAlphaBouncer, whxyBouncer, |
| yxBouncer); |
| } |
| } |
| |
| public void startAnimation() { |
| createAnimation(); |
| bounceAnim.start(); |
| } |
| |
| private ShapeHolder addBall(float x, float y) { |
| OvalShape circle = new OvalShape(); |
| circle.resize(BALL_SIZE, BALL_SIZE); |
| ShapeDrawable drawable = new ShapeDrawable(circle); |
| ShapeHolder shapeHolder = new ShapeHolder(drawable); |
| shapeHolder.setX(x); |
| shapeHolder.setY(y); |
| int red = (int)(100 + Math.random() * 155); |
| int green = (int)(100 + Math.random() * 155); |
| int blue = (int)(100 + Math.random() * 155); |
| int color = 0xff000000 | red << 16 | green << 8 | blue; |
| Paint paint = drawable.getPaint(); |
| int darkColor = 0xff000000 | red/4 << 16 | green/4 << 8 | blue/4; |
| RadialGradient gradient = new RadialGradient(37.5f, 12.5f, |
| 50f, color, darkColor, Shader.TileMode.CLAMP); |
| paint.setShader(gradient); |
| shapeHolder.setPaint(paint); |
| balls.add(shapeHolder); |
| return shapeHolder; |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| for (ShapeHolder ball : balls) { |
| canvas.translate(ball.getX(), ball.getY()); |
| ball.getShape().draw(canvas); |
| canvas.translate(-ball.getX(), -ball.getY()); |
| } |
| } |
| |
| public void onAnimationUpdate(ValueAnimator animation) { |
| invalidate(); |
| } |
| |
| } |
| } |