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：

 <declare-styleable name="weiqiview">
<!--  黑子颜色-->
  <attr name="leftscolor" format="reference|color"/>
<!--  白子颜色-->
  <attr name="rightscolor" format="reference|color"/>
<!--  棋盘颜色-->
  <attr name="qipancolor" format="reference|color"/>
<!--  动画时间-->
  <attr name="animalstime" format="integer"/>
 </declare-styleable>

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

<resources>
 <declare-styleable name="weiqiview">
<!--  黑子颜色-->
  <attr name="leftscolor" format="reference|color"/>
<!--  白子颜色-->
  <attr name="rightscolor" format="reference|color"/>
<!--  棋盘颜色-->
  <attr name="qipancolor" format="reference|color"/>
<!--  动画时间-->
  <attr name="animalstime" format="integer"/>
 </declare-styleable>
</resources>

布局调用

<com.shenzhen.jimeng.lookui.ui.weiqiview
 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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