android自定义改变宽度动画,Android自定义view之围棋动画效果的实现

前言

废话不多说直接开始

老规矩，文章最后有源码

完成效果图

棋子加渐变色

棋子不加渐变色

一、测量

1.获取宽高

@Override

protected void onSizeChanged(int w, int h, int oldw, int oldh) {

super.onSizeChanged(w, h, oldw, oldh);

mWidth = w;

mHeight = h;

useWidth = mWidth;

if (mWidth > mHeight) {

useWidth = mHeight;

}

}

2.定义测量最小长度

将布局分为10份。以minwidth的1，3，5，7，9的倍数为标准点。

minwidth = useWidth / 10;

二、绘制背景(棋盘)

1.初始化画笔

mPaint = new Paint(); //创建画笔对象

mPaint.setColor(Color.BLACK); //设置画笔颜色

mPaint.setStyle(Paint.Style.FILL); //设置画笔模式为填充

mPaint.setStrokeWidth(4f); //设置画笔宽度为10px

mPaint.setAntiAlias(true); //设置抗锯齿

mPaint.setAlpha(255); //设置画笔透明度

2.画棋盘

//细的X轴

canvas.drawLine(minwidth, 3 * minwidth, 9 * minwidth, 3 * minwidth, mPaint);// 斜线

canvas.drawLine(minwidth, 5 * minwidth, 9 * minwidth, 5 * minwidth, mPaint);// 斜线

canvas.drawLine(minwidth, 7 * minwidth, 9 * minwidth, 7 * minwidth, mPaint);// 斜线

//细的y轴

canvas.drawLine(3 * minwidth, minwidth, 3 * minwidth, 9 * minwidth, mPaint);// 斜线

canvas.drawLine(5 * minwidth, minwidth, 5 * minwidth, 9 * minwidth, mPaint);// 斜线

canvas.drawLine(7 * minwidth, minwidth, 7 * minwidth, 9 * minwidth, mPaint);// 斜线

mPaint.setStrokeWidth(8f);

//粗的X轴(边框)

canvas.drawLine(minwidth, minwidth, 9 * minwidth, minwidth, mPaint);// 斜线

canvas.drawLine(minwidth, 9 * minwidth, 9 * minwidth, 9 * minwidth, mPaint);// 斜线

//粗的y轴(边框)

canvas.drawLine(minwidth, minwidth, minwidth, 9 * minwidth, mPaint);// 斜线

canvas.drawLine(9 * minwidth, minwidth, 9 * minwidth, 9 * minwidth, mPaint);// 斜线

绘制完后，发现有点小瑕疵

效果图：

3.补棋盘瑕疵

canvas.drawPoint(minwidth, minwidth, mPaint);

canvas.drawPoint(9 * minwidth, minwidth, mPaint);

canvas.drawPoint(minwidth, 9 * minwidth, mPaint);

canvas.drawPoint(9 * minwidth, 9 * minwidth, mPaint);

效果图：

三.画个不可改变的棋子(以便于了解动画移动位置)

位置比例

(3,3)(3,5)(3,7)

(5,3)(5,5)(5,7)

(7,3)(7,5)(7,7)

//画围棋

canvas.drawCircle(3*minwidth, 3*minwidth, useWidth/16, mPaint);

canvas.drawCircle(3*minwidth, 7*minwidth, useWidth/16, mPaint);

canvas.drawCircle(5*minwidth, 5*minwidth, useWidth/16, mPaint);

canvas.drawCircle(7*minwidth, 3*minwidth, useWidth/16, mPaint);

canvas.drawCircle(7*minwidth, 7*minwidth, useWidth/16, mPaint);

mPaint.setColor(rightcolor);

canvas.drawCircle(3*minwidth, 5*minwidth, useWidth/16, mPaint);

canvas.drawCircle(5*minwidth, 3*minwidth, useWidth/16, mPaint);

canvas.drawCircle(5*minwidth, 7*minwidth, useWidth/16, mPaint);

canvas.drawCircle(7*minwidth, 5*minwidth, useWidth/16, mPaint);

效果图：

四.为动画开始做准备以及动画

1.三个辅助类为动画做准备(参数模仿Android官方Demo)

主要为get set构造，代码会贴到最后

2.自定义该接口实例来控制动画的更新计算表达式

public class XYEvaluator implements TypeEvaluator {

public Object evaluate(float fraction, Object startValue, Object endValue) {

XYHolder startXY = (XYHolder) startValue;

XYHolder endXY = (XYHolder) endValue;

return new XYHolder(startXY.getX() + fraction * (endXY.getX() - startXY.getX()),

startXY.getY() + fraction * (endXY.getY() - startXY.getY()));

}

}

3.棋子的创建

private ShapeHolder createBall(float x, float y, int color) {

OvalShape circle = new OvalShape();

circle.resize(useWidth / 8f, useWidth / 8f);

ShapeDrawable drawable = new ShapeDrawable(circle);

ShapeHolder shapeHolder = new ShapeHolder(drawable);

shapeHolder.setX(x - useWidth / 16f);

shapeHolder.setY(y - useWidth / 16f);

Paint paint = drawable.getPaint();

paint.setColor(color);

return shapeHolder;

}

4.动画的创建

private void createAnimation() {

if (bounceAnim == null) {

XYHolder lstartXY = new XYHolder(3 * minwidth - useWidth / 16f, 3 * minwidth - useWidth / 16f);

XYHolder processXY = new XYHolder(7 * minwidth - useWidth / 16f, 3 * minwidth - useWidth / 16f);

XYHolder lendXY = new XYHolder(7 * minwidth - useWidth / 16f, 7 * minwidth - useWidth / 16f);

bounceAnim = ObjectAnimator.ofObject(ballHolder, "xY",

new XYEvaluator(), lstartXY, processXY, lendXY, lstartXY);

bounceAnim.setDuration(animaltime);

bounceAnim.setRepeatCount(ObjectAnimator.INFINITE);

bounceAnim.setRepeatMode(ObjectAnimator.RESTART);

bounceAnim.addUpdateListener(this);

}

if (bounceAnim1 == null) {

XYHolder lstartXY = new XYHolder(7 * minwidth - useWidth / 16f, 7 * minwidth - useWidth / 16f);

XYHolder processXY = new XYHolder(3 * minwidth - useWidth / 16f, 7 * minwidth - useWidth / 16f);

XYHolder lendXY = new XYHolder(3 * minwidth - useWidth / 16f, 3 * minwidth - useWidth / 16f);

bounceAnim1 = ObjectAnimator.ofObject(ballHolder1, "xY",

new XYEvaluator(), lstartXY, processXY, lendXY, lstartXY);

bounceAnim1.setDuration(animaltime);

bounceAnim1.setRepeatCount(ObjectAnimator.INFINITE);

bounceAnim1.setRepeatMode(ObjectAnimator.RESTART);

bounceAnim1.addUpdateListener(this);

}

}

5.两个动画的同步执行

AnimatorSet animatorSet = new AnimatorSet();

animatorSet.play(bounceAnim).with(bounceAnim1);

animatorSet.start();

6.效果图

视觉效果：感觉白子不太明显

7.解决第6步问题

在棋子的创建方法中添加渐变色

RadialGradient gradient = new RadialGradient(useWidth / 16f, useWidth / 16f,

useWidth / 8f, color, Color.GRAY, Shader.TileMode.CLAMP);

paint.setShader(gradient);

shapeHolder.setPaint(paint);

效果图：

五.自定义属性

attrs文件：

java文件中获取

/**

* 获取自定义属性

*/

private void initCustomAttrs(Context context, AttributeSet attrs) {

//获取自定义属性

TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.WeiqiView);

//获取颜色

leftcolor = ta.getColor(R.styleable.WeiqiView_leftscolor, Color.BLACK);

rightcolor = ta.getColor(R.styleable.WeiqiView_rightscolor, Color.WHITE);

qipancolor = ta.getColor(R.styleable.WeiqiView_qipancolor, Color.BLACK);

//获取动画时间

animaltime = ta.getInt(R.styleable.WeiqiView_animalstime, 2000);

//回收

ta.recycle();

}

六.自定义属性设置后运行效果

七.小改变，视觉效果就不一样了！

然后，把背景注释，像不像那些等待动画？

八.源码

WeiqiView.java

public class WeiqiView extends View implements ValueAnimator.AnimatorUpdateListener {

private Paint mPaint;

private int mWidth;

private int mHeight;

private int useWidth, minwidth;

private int leftcolor;

private int rightcolor;

private int qipancolor;

private int animaltime;

//画一个圆(棋子)

ValueAnimator bounceAnim, bounceAnim1 = null;

ShapeHolder ball, ball1 = null;

QiziXYHolder ballHolder, ballHolder1 = null;

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)

public WeiqiView(Context context) {

this(context, null);

}

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)

public WeiqiView(Context context, @Nullable AttributeSet attrs) {

this(context, attrs, 0);

}

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)

public WeiqiView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {

this(context, attrs, defStyleAttr, 0);

initCustomAttrs(context, attrs);

}

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)

public WeiqiView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {

super(context, attrs, defStyleAttr, defStyleRes);

}

private void init() {

initPaint();

}

/**

* 获取自定义属性

*/

private void initCustomAttrs(Context context, AttributeSet attrs) {

//获取自定义属性。

TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.WeiqiView);

//获取颜色

leftcolor = ta.getColor(R.styleable.WeiqiView_leftscolor, Color.BLACK);

rightcolor = ta.getColor(R.styleable.WeiqiView_rightscolor, Color.WHITE);

qipancolor = ta.getColor(R.styleable.WeiqiView_qipancolor, Color.BLACK);

animaltime = ta.getInt(R.styleable.WeiqiView_animalstime, 2000);

//回收

ta.recycle();

}

/**

* 初始化画笔

*/

private void initPaint() {

mPaint = new Paint(); //创建画笔对象

mPaint.setColor(Color.BLACK); //设置画笔颜色

mPaint.setStyle(Paint.Style.FILL); //设置画笔模式为填充

mPaint.setStrokeWidth(4f); //设置画笔宽度为10px

mPaint.setAntiAlias(true); //设置抗锯齿

mPaint.setAlpha(255); //设置画笔透明度

}

@Override

protected void onSizeChanged(int w, int h, int oldw, int oldh) {

super.onSizeChanged(w, h, oldw, oldh);

mWidth = w;

mHeight = h;

useWidth = mWidth;

if (mWidth > mHeight) {

useWidth = mHeight;

}

}

@RequiresApi(api = Build.VERSION_CODES.KITKAT)

@Override

protected void onDraw(Canvas canvas) {

super.onDraw(canvas);

init();

minwidth = useWidth / 10;

mPaint.setColor(qipancolor);

if (ball == null) {

ball = createBall(3 * minwidth, 3 * minwidth, leftcolor);

ballHolder = new QiziXYHolder(ball);

}

if (ball1 == null) {

ball1 = createBall(7 * minwidth, 7 * minwidth, rightcolor);

ballHolder1 = new QiziXYHolder(ball1);

}

//细的X轴

canvas.drawLine(minwidth, 3 * minwidth, 9 * minwidth, 3 * minwidth, mPaint);// 斜线

canvas.drawLine(minwidth, 5 * minwidth, 9 * minwidth, 5 * minwidth, mPaint);// 斜线

canvas.drawLine(minwidth, 7 * minwidth, 9 * minwidth, 7 * minwidth, mPaint);// 斜线

//细的y轴

canvas.drawLine(3 * minwidth, minwidth, 3 * minwidth, 9 * minwidth, mPaint);// 斜线

canvas.drawLine(5 * minwidth, minwidth, 5 * minwidth, 9 * minwidth, mPaint);// 斜线

canvas.drawLine(7 * minwidth, minwidth, 7 * minwidth, 9 * minwidth, mPaint);// 斜线

mPaint.setStrokeWidth(8f);

//粗的X轴(边框)

canvas.drawLine(minwidth, minwidth, 9 * minwidth, minwidth, mPaint);// 斜线

canvas.drawLine(minwidth, 9 * minwidth, 9 * minwidth, 9 * minwidth, mPaint);// 斜线

//粗的y轴(边框)

canvas.drawLine(minwidth, minwidth, minwidth, 9 * minwidth, mPaint);// 斜线

canvas.drawLine(9 * minwidth, minwidth, 9 * minwidth, 9 * minwidth, mPaint);// 斜线

//补瑕疵

canvas.drawPoint(minwidth, minwidth, mPaint);

canvas.drawPoint(9 * minwidth, minwidth, mPaint);

canvas.drawPoint(minwidth, 9 * minwidth, mPaint);

canvas.drawPoint(9 * minwidth, 9 * minwidth, mPaint);

// //画围棋

// canvas.drawCircle(3*minwidth, 3*minwidth, useWidth/16, mPaint);

// canvas.drawCircle(3*minwidth, 7*minwidth, useWidth/16, mPaint);

// canvas.drawCircle(5*minwidth, 5*minwidth, useWidth/16, mPaint);

// canvas.drawCircle(7*minwidth, 3*minwidth, useWidth/16, mPaint);

// canvas.drawCircle(7*minwidth, 7*minwidth, useWidth/16, mPaint);

// mPaint.setColor(rightcolor);

// canvas.drawCircle(3*minwidth, 5*minwidth, useWidth/16, mPaint);

// canvas.drawCircle(5*minwidth, 3*minwidth, useWidth/16, mPaint);

// canvas.drawCircle(5*minwidth, 7*minwidth, useWidth/16, mPaint);

// canvas.drawCircle(7*minwidth, 5*minwidth, useWidth/16, mPaint);

canvas.save();

canvas.translate(ball.getX(), ball.getY());

ball.getShape().draw(canvas);

canvas.restore();

canvas.save();

canvas.translate(ball1.getX(), ball1.getY());

ball1.getShape().draw(canvas);

canvas.restore();

}

private ShapeHolder createBall(float x, float y, int color) {

OvalShape circle = new OvalShape();

circle.resize(useWidth / 8f, useWidth / 8f);

ShapeDrawable drawable = new ShapeDrawable(circle);

ShapeHolder shapeHolder = new ShapeHolder(drawable);

shapeHolder.setX(x - useWidth / 16f);

shapeHolder.setY(y - useWidth / 16f);

Paint paint = drawable.getPaint();

paint.setColor(color);

RadialGradient gradient = new RadialGradient(useWidth / 16f, useWidth / 16f,

useWidth / 8f, color, Color.GRAY, Shader.TileMode.CLAMP);

paint.setShader(gradient);

shapeHolder.setPaint(paint);

return shapeHolder;

}

private void createAnimation() {

if (bounceAnim == null) {

XYHolder lstartXY = new XYHolder(3 * minwidth - useWidth / 16f, 3 * minwidth - useWidth / 16f);

XYHolder processXY = new XYHolder(7 * minwidth - useWidth / 16f, 3 * minwidth - useWidth / 16f);

XYHolder lendXY = new XYHolder(7 * minwidth - useWidth / 16f, 7 * minwidth - useWidth / 16f);

bounceAnim = ObjectAnimator.ofObject(ballHolder, "xY",

new XYEvaluator(), lstartXY, processXY, lendXY, lstartXY);

bounceAnim.setDuration(animaltime);

bounceAnim.setRepeatCount(ObjectAnimator.INFINITE);

bounceAnim.setRepeatMode(ObjectAnimator.RESTART);

bounceAnim.addUpdateListener(this);

}

if (bounceAnim1 == null) {

XYHolder lstartXY = new XYHolder(7 * minwidth - useWidth / 16f, 7 * minwidth - useWidth / 16f);

XYHolder processXY = new XYHolder(3 * minwidth - useWidth / 16f, 7 * minwidth - useWidth / 16f);

XYHolder lendXY = new XYHolder(3 * minwidth - useWidth / 16f, 3 * minwidth - useWidth / 16f);

bounceAnim1 = ObjectAnimator.ofObject(ballHolder1, "xY",

new XYEvaluator(), lstartXY, processXY, lendXY, lstartXY);

bounceAnim1.setDuration(animaltime);

bounceAnim1.setRepeatCount(ObjectAnimator.INFINITE);

bounceAnim1.setRepeatMode(ObjectAnimator.RESTART);

bounceAnim1.addUpdateListener(this);

}

}

public void startAnimation() {

createAnimation();

AnimatorSet animatorSet = new AnimatorSet();

animatorSet.play(bounceAnim).with(bounceAnim1);

animatorSet.start();

}

@Override

public void onAnimationUpdate(ValueAnimator animation) {

invalidate();

}

}

QiziXYHolder.java

public class QiziXYHolder {

private ShapeHolder mBall;

public QiziXYHolder(ShapeHolder ball) {

mBall = ball;

}

public void setXY(XYHolder xyHolder) {

mBall.setX(xyHolder.getX());

mBall.setY(xyHolder.getY());

}

public XYHolder getXY() {

return new XYHolder(mBall.getX(), mBall.getY());

}

}

ShapeHolder.java

public class ShapeHolder {

private float x = 0, y = 0;

private ShapeDrawable shape;

private int color;

private RadialGradient gradient;

private float alpha = 1f;

private Paint paint;

public void setPaint(Paint value) {

paint = value;

}

public Paint getPaint() {

return paint;

}

public void setX(float value) {

x = value;

}

public float getX() {

return x;

}

public void setY(float value) {

y = value;

}

public float getY() {

return y;

}

public void setShape(ShapeDrawable value) {

shape = value;

}

public ShapeDrawable getShape() {

return shape;

}

public int getColor() {

return color;

}

public void setColor(int value) {

shape.getPaint().setColor(value);

color = value;

}

public void setGradient(RadialGradient value) {

gradient = value;

}

public RadialGradient getGradient() {

return gradient;

}

public void setAlpha(float alpha) {

this.alpha = alpha;

shape.setAlpha((int)((alpha * 255f) + .5f));

}

public float getWidth() {

return shape.getShape().getWidth();

}

public void setWidth(float width) {

Shape s = shape.getShape();

s.resize(width, s.getHeight());

}

public float getHeight() {

return shape.getShape().getHeight();

}

public void setHeight(float height) {

Shape s = shape.getShape();

s.resize(s.getWidth(), height);

}

public ShapeHolder(ShapeDrawable s) {

shape = s;

}

}

XYEvaluator.java

public class XYEvaluator implements TypeEvaluator {

public Object evaluate(float fraction, Object startValue, Object endValue) {

XYHolder startXY = (XYHolder) startValue;

XYHolder endXY = (XYHolder) endValue;

return new XYHolder(startXY.getX() + fraction * (endXY.getX() - startXY.getX()),

startXY.getY() + fraction * (endXY.getY() - startXY.getY()));

}

}

XYHolder.java

public class XYHolder {

private float mX;

private float mY;

public XYHolder(float x, float y) {

mX = x;

mY = y;

}

public float getX() {

return mX;

}

public void setX(float x) {

mX = x;

}

public float getY() {

return mY;

}

public void setY(float y) {

mY = y;

}

}

attrs.xml

布局调用

android:layout_centerInParent="true"

android:id="@+id/weiqi"

android:layout_width="400dp"

android:layout_height="400dp"/>

activity文件中开启动画

weiqi = (WeiqiView) findViewById(R.id.weiqi);

weiqi.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

weiqi.startAnimation();

}

});

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