Add ApiDemo to show the new seeking behavior of Animator
Change-Id: I4ad4e322af9c1d8419e1d7f8bea6b20951a1dc4f
This commit is contained in:
Chet Haase
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.apis.animation;
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// Need the following import to get access to the app resources, since this
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// class is in a sub-package.
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import com.example.android.apis.R;
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import java.util.ArrayList;
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import android.animation.Animatable;
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import android.animation.Animator;
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import android.animation.PropertyAnimator;
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import android.animation.Sequencer;
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import android.animation.Animatable.AnimatableListener;
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import android.app.Activity;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.RadialGradient;
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import android.graphics.Shader;
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import android.graphics.drawable.ShapeDrawable;
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import android.graphics.drawable.shapes.OvalShape;
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import android.os.Bundle;
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import android.view.View;
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import android.view.animation.BounceInterpolator;
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import android.widget.Button;
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import android.widget.LinearLayout;
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import android.widget.SeekBar;
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/**
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* This application demonstrates the seeking capability of Animator. The SeekBar in the
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* UI allows you to set the position of the animation. Pressing the Run button will play from
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* the current position of the animation.
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*/
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public class AnimationSeeking extends Activity {
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private static final int DURATION = 1500;
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private SeekBar mSeekBar;
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/** Called when the activity is first created. */
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.animation_seeking);
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LinearLayout container = (LinearLayout) findViewById(R.id.container);
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final MyAnimationView animView = new MyAnimationView(this);
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container.addView(animView);
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Button starter = (Button) findViewById(R.id.startButton);
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starter.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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animView.startAnimation();
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}
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});
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mSeekBar = (SeekBar) findViewById(R.id.seekBar);
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mSeekBar.setMax(DURATION);
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mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
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@Override
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public void onStopTrackingTouch(SeekBar seekBar) {
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}
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@Override
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public void onStartTrackingTouch(SeekBar seekBar) {
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}
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@Override
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public void onProgressChanged(SeekBar seekBar, int progress,
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boolean fromUser) {
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// prevent seeking on app creation
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if (animView.getHeight() != 0) {
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animView.seek(progress);
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}
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}
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});
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}
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public class MyAnimationView extends View implements Animator.AnimatorUpdateListener, AnimatableListener {
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private static final int RED = 0xffFF8080;
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private static final int BLUE = 0xff8080FF;
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private static final int CYAN = 0xff80ffff;
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private static final int GREEN = 0xff80ff80;
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private static final float BALL_SIZE = 100f;
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public final ArrayList<ShapeHolder> balls = new ArrayList<ShapeHolder>();
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Sequencer animation = null;
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Animator bounceAnim = null;
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ShapeHolder ball = null;
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public MyAnimationView(Context context) {
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super(context);
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ball = addBall(200, 0);
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}
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private void createAnimation() {
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if (bounceAnim == null) {
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bounceAnim = new PropertyAnimator(1500, ball, "y",
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ball.getY(), getHeight() - BALL_SIZE);
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bounceAnim.setInterpolator(new BounceInterpolator());
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bounceAnim.addUpdateListener(this);
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}
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}
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public void startAnimation() {
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createAnimation();
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bounceAnim.start();
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}
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public void seek(long seekTime) {
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createAnimation();
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bounceAnim.setCurrentPlayTime(seekTime);
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}
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private ShapeHolder addBall(float x, float y) {
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OvalShape circle = new OvalShape();
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circle.resize(BALL_SIZE, BALL_SIZE);
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ShapeDrawable drawable = new ShapeDrawable(circle);
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ShapeHolder shapeHolder = new ShapeHolder(drawable);
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shapeHolder.setX(x);
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shapeHolder.setY(y);
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int red = (int)(100 + Math.random() * 155);
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int green = (int)(100 + Math.random() * 155);
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int blue = (int)(100 + Math.random() * 155);
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int color = 0xff000000 | red << 16 | green << 8 | blue;
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Paint paint = drawable.getPaint();
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int darkColor = 0xff000000 | red/4 << 16 | green/4 << 8 | blue/4;
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RadialGradient gradient = new RadialGradient(37.5f, 12.5f,
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50f, color, darkColor, Shader.TileMode.CLAMP);
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paint.setShader(gradient);
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shapeHolder.setPaint(paint);
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balls.add(shapeHolder);
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return shapeHolder;
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}
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@Override
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protected void onDraw(Canvas canvas) {
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canvas.translate(ball.getX(), ball.getY());
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ball.getShape().draw(canvas);
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}
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public void onAnimationUpdate(Animator animation) {
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invalidate();
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long playtime = bounceAnim.getCurrentPlayTime();
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//mSeekBar.setProgress((int)playtime);
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}
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@Override
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public void onAnimationCancel(Animatable animation) {
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}
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@Override
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public void onAnimationEnd(Animatable animation) {
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balls.remove(((PropertyAnimator)animation).getTarget());
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}
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@Override
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public void onAnimationRepeat(Animatable animation) {
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}
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@Override
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public void onAnimationStart(Animatable animation) {
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}
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}
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}
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@@ -0,0 +1,102 @@
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.apis.animation;
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import android.graphics.Paint;
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import android.graphics.RadialGradient;
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import android.graphics.drawable.ShapeDrawable;
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import android.graphics.drawable.shapes.Shape;
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import android.view.View;
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/**
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* A data structure that holds a Shape and various properties that can be used to define
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* how the shape is drawn.
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*/
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public class ShapeHolder {
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private float x = 0, y = 0;
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private ShapeDrawable shape;
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private int color;
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private RadialGradient gradient;
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private float alpha = 1f;
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private Paint paint;
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public void setPaint(Paint value) {
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paint = value;
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}
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public Paint getPaint() {
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return paint;
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}
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public void setX(float value) {
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x = value;
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}
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public float getX() {
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return x;
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}
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public void setY(float value) {
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y = value;
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}
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public float getY() {
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return y;
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}
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public void setShape(ShapeDrawable value) {
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shape = value;
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}
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public ShapeDrawable getShape() {
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return shape;
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}
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public int getColor() {
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return color;
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}
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public void setColor(int value) {
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color = value;
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}
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public void setGradient(RadialGradient value) {
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gradient = value;
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}
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public RadialGradient getGradient() {
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return gradient;
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}
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public void setAlpha(float alpha) {
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this.alpha = alpha;
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shape.setAlpha((int)((alpha * 255f) + .5f));
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}
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public float getWidth() {
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//return shape.getIntrinsicWidth();
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return shape.getShape().getWidth();
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}
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public void setWidth(float width) {
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//shape.setIntrinsicWidth(width);
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Shape s = shape.getShape();
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s.resize(width, s.getHeight());
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}
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public float getHeight() {
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return shape.getShape().getHeight();
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}
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public void setHeight(float height) {
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Shape s = shape.getShape();
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s.resize(s.getWidth(), height);
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//shape.setIntrinsicHeight(height);
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}
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public ShapeHolder(ShapeDrawable s) {
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shape = s;
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}
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}
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