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自定义LoadingView大全

来源:程序员人生   发布时间:2016-08-26 09:26:36 阅读次数:2299次

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概述

有时候我会为了实现某个动画的算法而挖空心思,苦苦思考。常常会在草稿上面绘制动画轨迹,真的很多时候几天就在纠结1个动画的实现,不过最后成功后真的很满足喜悦。

我陆续出过1些LodingView的文章,但都比较杂乱。近来我在网上看到1张图,并通过代码实现了出来。在这边非常感谢@ldoublem,我会不断更新LodingView把好看及简洁的动画集成进来,希望能够帮助到你。

下载源码

先出图说话:

load

WSCircleCD

public class WSCircleCD extends View { private Paint mPaint; private Context mContext; private int circleCenterX, circleCenterY; private int circleRadius; private final static float RADIUS_RATIO = 2 / 3f; public WSCircleCD(Context context) { this(context, null); } public WSCircleCD(Context context, AttributeSet attrs) { this(context, attrs, 0); } public WSCircleCD(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(context); } private void init(Context context) { mContext = context; mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setDither(true); mPaint.setColor(Color.WHITE); mPaint.setStyle(Paint.Style.STROKE); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec); int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec); int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); //处理 wrap_content问题 int defaultDimension = dip2px(100); if (widthSpecMode == MeasureSpec.AT_MOST && heightSpecMode == MeasureSpec.AT_MOST) { setMeasuredDimension(defaultDimension, defaultDimension); } else if (widthSpecMode == MeasureSpec.AT_MOST) { setMeasuredDimension(defaultDimension, heightSpecSize); } else if (heightSpecMode == MeasureSpec.AT_MOST) { setMeasuredDimension(widthSpecSize, defaultDimension); } } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); circleCenterX = w / 2; circleCenterY = h / 2; //处理padding情况 circleRadius = (int) (Math.min(Math.min(circleCenterY - getPaddingTop(), circleCenterY - getPaddingBottom()), Math.min(circleCenterX - getPaddingLeft(), circleCenterX - getPaddingRight())) * RADIUS_RATIO); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setStrokeWidth(dip2px(2)); canvas.drawCircle(circleCenterX, circleCenterY, circleRadius, mPaint);//画大圆 canvas.drawCircle(circleCenterX, circleCenterY, dip2px(4), mPaint);//画中心小圆圆 // 下面是画弧线 RectF rectF = new RectF(circleCenterX - circleRadius * RADIUS_RATIO, circleCenterY - circleRadius * RADIUS_RATIO, circleCenterX + circleRadius * RADIUS_RATIO, circleCenterY + circleRadius * RADIUS_RATIO); canvas.drawArc(rectF, 0, 80, false, mPaint); canvas.drawArc(rectF, 180, 80, false, mPaint); rectF = new RectF(circleCenterX - circleRadius / 2, circleCenterY - circleRadius / 2, circleCenterX + circleRadius / 2, circleCenterY + circleRadius / 2); canvas.drawArc(rectF, 0, 80, false, mPaint); canvas.drawArc(rectF, 180, 80, false, mPaint); } //开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { RotateAnimation animation = new RotateAnimation(0f, 360f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); animation.setInterpolator(new LinearInterpolator()); animation.setRepeatCount(-1); animation.setDuration(1000); animation.setFillAfter(true); startAnimation(animation); } }); } public void setPaintColor(int color) { mPaint.setColor(color); } /** * 根据手机的分辨率从 dp 的单位 转成为 px(像素) */ public int dip2px(float dpValue) { final float scale = mContext.getResources().getDisplayMetrics().density; return (int) (dpValue * scale + 0.5f); } }

我主要讲授下红字注释的地方,为何自定义1个View在布局时将其大小设为wrap_content但其实际却是match_parent的效果?请查阅谷歌的小弟1自定义View系列教程02–onMeasure源码详实分析;处理padding情况,不然布局xml文件设置padding值将无效;绘制进程比较简单,我这里就不再详细讲授,有不懂请给我留言。

WSCircleSun

WSCircleSun主要是控制小圆的旋转,每次移动角度就增加moveAngle

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setStrokeWidth(circleRadius * SMALL_RADIUS_RATIO); //绘制小圆 for (int i = 0; i < SMALL_CIRCLE_COUNT; i++) { canvas.drawCircle((float) (circleCenterX + circleRadius * Math.sin(Math.toRadians(i * 360 / SMALL_CIRCLE_COUNT + moveAngle))), (float) (circleCenterY + circleRadius * Math.cos(Math.toRadians(i * 360 / SMALL_CIRCLE_COUNT + moveAngle))), circleRadius * SMALL_RADIUS_RATIO, mPaint); } //绘制大圆 canvas.drawCircle(circleCenterX, circleCenterY, circleRadius * LARGE_RADIUS_RATIO, mPaint); }
//开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { ValueAnimator animator = ValueAnimator.ofInt(0, 361); animator.setDuration(3000); animator.setInterpolator(new LinearInterpolator()); animator.setRepeatMode(ValueAnimator.RESTART); animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { moveAngle = (int) valueAnimator.getAnimatedValue(); postInvalidate(); } }); animator.start(); } }); }

WSCircleRing

WSCircleRing主要是控制弧度的startAngle

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setColor(Color.WHITE); mPaint.setStrokeWidth(circleRadius * RING_RADIUS_RATIO); canvas.drawCircle(circleCenterX, circleCenterY, circleRadius, mPaint);//画背景 mPaint.setColor(Color.parseColor("#FF4081")); RectF rectF = new RectF(circleCenterX - circleRadius, circleCenterY - circleRadius, circleCenterX + circleRadius, circleCenterY + circleRadius); canvas.drawArc(rectF, 0 + moveAngle, 80, false, mPaint); } //开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { ValueAnimator animator = ValueAnimator.ofInt(0, 361); animator.setDuration(1000); animator.setInterpolator(new LinearInterpolator()); animator.setRepeatMode(ValueAnimator.RESTART); animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { moveAngle = (int) valueAnimator.getAnimatedValue(); postInvalidate(); } }); animator.start(); } }); }

WSCircleFace

WSCircleFace主要是控制脸的出现和消失,动画出现1半后脸出现,反之消失。

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(circleRadius * FACE_RADIUS_RATIO); RectF rectF = new RectF(circleCenterX - circleRadius, circleCenterY - circleRadius, circleCenterX + circleRadius, circleCenterY + circleRadius); canvas.drawArc(rectF, startAngle, 180, false, mPaint); mPaint.setStyle(Paint.Style.FILL); if (isFace) { //画脸 canvas.drawCircle((float) (circleCenterX - circleRadius * Math.sin(Math.toRadians(EYE_ROUND))), (float) (circleCenterY - circleRadius * Math.cos(Math.toRadians(EYE_ROUND))), mPaint.getStrokeWidth() * 3 / 2, mPaint); canvas.drawCircle((float) (circleCenterX + circleRadius * Math.sin(Math.toRadians(EYE_ROUND))), (float) (circleCenterY - circleRadius * Math.cos(Math.toRadians(EYE_ROUND))), mPaint.getStrokeWidth() * 3 / 2, mPaint); } } //开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { ValueAnimator animator = ValueAnimator.ofFloat(0f, 1.0f); animator.setDuration(1500); animator.setInterpolator(new LinearInterpolator()); animator.setRepeatMode(ValueAnimator.RESTART); animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { float mAnimatedValue = (float) valueAnimator.getAnimatedValue(); if (mAnimatedValue < 0.5) { isFace = false; startAngle = (int) (720 * mAnimatedValue); } else { startAngle = 720; isFace = true; } postInvalidate(); } }); animator.start(); } }); }

WSCircleJump

WSCircleJump主要是控制小圆的弹跳,上1个小圆弹跳结束后下1个小圆开始。

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setStrokeWidth(mRadius * JUMP_BALL_RATIO); //画小球 for (int i = 0; i < BALL_COUNT; i++) { if (i == currentBallPosition) { canvas.drawCircle((centerX - mRadius) + 2 * mRadius / (BALL_COUNT - 1) * i, centerY - ballJumpY, mPaint.getStrokeWidth(), mPaint); } else { canvas.drawCircle((centerX - mRadius) + 2 * mRadius / (BALL_COUNT - 1) * i, centerY, mPaint.getStrokeWidth(), mPaint); } } } //开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { ValueAnimator animator = ValueAnimator.ofFloat(0f, 1.0f); animator.setDuration(500); animator.setInterpolator(new LinearInterpolator()); animator.setRepeatMode(ValueAnimator.RESTART); animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { mAnimatedValue = (float) valueAnimator.getAnimatedValue(); if (mAnimatedValue < 0.5) { ballJumpY = mAnimatedValue * mRadius; } else { ballJumpY = (1 - mAnimatedValue) * mRadius; } postInvalidate(); } }); animator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationStart(Animator animation) { super.onAnimationStart(animation); } @Override public void onAnimationEnd(Animator animation) { super.onAnimationEnd(animation); } @Override public void onAnimationRepeat(Animator animation) { super.onAnimationRepeat(animation); currentBallPosition++; if (currentBallPosition >= BALL_COUNT) { currentBallPosition = 0; } } }); animator.start(); } }); }

WSGears

WSGears主要是绘制大小齿轮。

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setStrokeWidth(outCircleRadius * GEAR_RADIUS_RATIO); //60 是偏移量 绘制直线 for (int i = 0; i < 360 / 120; i++) { canvas.drawLine(centerX, centerY, (float) (centerX + outCircleRadius * Math.sin(Math.toRadians(i * 120 + 60))), (float) (centerY + outCircleRadius * Math.cos(Math.toRadians(i * 120 + 60))), mPaint); } //绘制外圆齿轮 for (int i = 0; i < 360 / 8; i++) { canvas.drawLine((float) (centerX + outCircleRadius * Math.sin(Math.toRadians(i * 8 + moveAngle))), (float) (centerY + outCircleRadius * Math.cos(Math.toRadians(i * 8 + moveAngle))), (float) (centerX + (outCircleRadius + dip2px(4)) * Math.sin(Math.toRadians(i * 8 + moveAngle))), (float) (centerY + (outCircleRadius + dip2px(4)) * Math.cos(Math.toRadians(i * 8 + moveAngle))), mPaint); } //绘制内圆齿轮 mPaint.setStrokeWidth(inCircleRadius * GEAR_RADIUS_RATIO); for (int i = 0; i < 360 / 8; i++) { canvas.drawLine((float) (centerX + inCircleRadius * Math.sin(Math.toRadians(i * 8 - moveAngle))), (float) (centerY + inCircleRadius * Math.cos(Math.toRadians(i * 8 - moveAngle))), (float) (centerX + (inCircleRadius + dip2px(4)) * Math.sin(Math.toRadians(i * 8 - moveAngle))), (float) (centerY + (inCircleRadius + dip2px(4)) * Math.cos(Math.toRadians(i * 8 - moveAngle))), mPaint); } mPaint.setStrokeWidth(mPaint.getStrokeWidth() * 2); canvas.drawCircle(centerX, centerY, outCircleRadius, mPaint); canvas.drawCircle(centerX, centerY, inCircleRadius, mPaint); } //开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { ValueAnimator animator = ValueAnimator.ofFloat(0f, 1.0f); animator.setDuration(5000); animator.setInterpolator(new AccelerateDecelerateInterpolator()); animator.setRepeatMode(ValueAnimator.RESTART); animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { mAnimatedValue = (float) valueAnimator.getAnimatedValue(); moveAngle = (int) (mAnimatedValue * 360); postInvalidate(); } }); animator.start(); } }); }

WSJump

WSJump利用贝塞尔曲线实现弹动效果。

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(dip2px(2)); //绘制贝塞尔曲线 Path mPath = new Path(); mPath.moveTo(centerX - mRadius, centerY); mPath.quadTo(centerX, centerY + quadMoveY, centerX + mRadius, centerY); canvas.drawPath(mPath, mPaint); //绘制2边小球 dip2px(4)为小球半径 分别加上和减去半径 canvas.drawCircle(centerX - mRadius - dip2px(4), centerY, dip2px(4), mPaint); canvas.drawCircle(centerX + mRadius + dip2px(4), centerY, dip2px(4), mPaint); //绘制中间小球 dip2px(4+3) 两边小球的半径 加上自己的半径 mPaint.setStyle(Paint.Style.FILL); canvas.drawCircle(centerX, centerY - dip2px(4 + 3) - mJumpY, dip2px(6), mPaint); } //开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { ValueAnimator animator = ValueAnimator.ofFloat(0f, 1.0f); animator.setDuration(500); animator.setInterpolator(new LinearInterpolator()); animator.setRepeatMode(ValueAnimator.RESTART); animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { float value = (float) valueAnimator.getAnimatedValue(); if (value > 0.75f) { // 0.75 =0.25*3 quadMoveY = mRadius * (1 - value) * 3; } else { quadMoveY = value * mRadius; } if (value > 0.35f) {// 0.7 =0.35*2 mJumpY = (1 - value) * mRadius; } else { mJumpY = value * mRadius * 2; } postInvalidate(); } }); animator.start(); } }); }

WSFiveStar

WSFiveStar主要控制线条的绘制,1条直线从出发点绘制到终点,终点作为下1条直线的出发点,顺次绘制。利用mPath.rLineTo增量的方式绘制直线,如果你敢兴趣可以通过设置setRegularPolygon(int regularPolygon)方法设置需要绘制的是正多边形,我绘制出过正2104边形。

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setStrokeWidth(dip2px(2)); lineStartX = (float) (circleCenterX + circleRadius * Math.cos(Math.toRadians(startAngle))); lineStartY = (float) (circleCenterY + circleRadius * Math.sin(Math.toRadians(startAngle))); mPath.moveTo(lineStartX, lineStartY); lineEndX = (float) (circleCenterX + circleRadius * Math.cos(Math.toRadians(startAngle + polygonAngle * 2))); lineEndY = (float) (circleCenterY + circleRadius * Math.sin(Math.toRadians(startAngle + polygonAngle * 2))); mPath.rLineTo((lineEndX - lineStartX) * mValue, (lineEndY - lineStartY) * mValue); canvas.drawPath(mPath, mPaint); } //开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { ValueAnimator animator = ValueAnimator.ofFloat(0f, 1.0f); animator.setDuration(500); animator.setInterpolator(new LinearInterpolator()); animator.setRepeatMode(ValueAnimator.RESTART); animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { mValue = (float) animation.getAnimatedValue(); if (mValue >= 0.9f) { mValue = 1.0f; } postInvalidate(); } }); animator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationRepeat(Animator animation) { super.onAnimationRepeat(animation); startAngle += polygonAngle * 2; if (startAngle > polygonAngle * 2 * regularPolygon) { startAngle = 0; mPath.reset(); } } }); animator.start(); } }); }

WSLineProgress

WSLineProgress主要是控制两段直线的绘制。

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setStrokeWidth(dip2px(2)); mPaint.setTextSize(dip2px(20)); text = mValue + "%"; fontWidth = mPaint.measureText(text); fontHeight = getFontHeight(mPaint, text); if (mValue == 0) { canvas.drawText(text, centerX - mRadius, centerY + fontHeight / 2, mPaint); canvas.drawLine(centerX - mRadius + fontWidth, centerY, centerX + mRadius, centerY, mPaint); } else if (mValue >= 100) { canvas.drawText(text, centerX + mRadius - fontWidth, centerY + fontHeight / 2, mPaint); canvas.drawLine(centerX - mRadius, centerY, centerX + mRadius - fontWidth, centerY, mPaint); } else { float lineWidth = 2 * mRadius - fontWidth; //左侧直线 canvas.drawLine(centerX - mRadius, centerY, centerX - mRadius + (float) mValue / 100 * lineWidth, centerY, mPaint); //右侧直线 canvas.drawLine(centerX - mRadius + (float) mValue / 100 * lineWidth + fontWidth, centerY, centerX + mRadius, centerY, mPaint); //绘制文本 canvas.drawText(text, centerX - mRadius + (float) mValue / 100 * lineWidth, centerY + fontHeight / 2, mPaint); } } //开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { ValueAnimator animator = ValueAnimator.ofInt(0, 101); animator.setDuration(5000); animator.setInterpolator(new LinearInterpolator()); animator.setRepeatMode(ValueAnimator.RESTART); animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { mValue = (int) animation.getAnimatedValue(); postInvalidate(); } }); animator.start(); } }); }

WSEatBeans

WSEatBeans主要是控制嘴的张合,豆数量的变化。

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setStrokeWidth(dip2px(2)); RectF rectF = new RectF(centerX - mRadius + moveX, centerY - eatRadius, centerX - mRadius + eatRadius * 2 + moveX, centerY + eatRadius); canvas.drawArc(rectF, eatStartAngle, eatSweepAngle, true, mPaint); //画眼睛 mPaint.setColor(Color.BLACK); canvas.drawCircle(centerX - mRadius + eatRadius + moveX, centerY - eatRadius / 2, dip2px(2), mPaint); //绘制豆 mPaint.setColor(Color.WHITE); //豆的个数是间隔数减去1 int count = (2 * (mRadius - eatRadius)) / eatRadius - 1; for (int i = eatBeans; i < count; i++) { canvas.drawCircle(centerX - mRadius + eatRadius * 2 + eatRadius * (i + 1), centerY, dip2px(2), mPaint); } } //开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { ValueAnimator animator = ValueAnimator.ofFloat(0f, 1.0f); animator.setDuration(3000); animator.setInterpolator(new LinearInterpolator()); animator.setRepeatMode(ValueAnimator.RESTART); animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { moveX = (int) ((float) animation.getAnimatedValue() * 2 * (mRadius - eatRadius)); eatBeans = moveX / eatRadius; if (eatState == 0) { eatStartAngle -= 2; if (eatStartAngle <= 0) { eatState = 1; } } else if (eatState == 1) { eatStartAngle += 2; if (eatStartAngle >= 30) { eatState = 0; } } eatSweepAngle = 360 - eatStartAngle * 2; postInvalidate(); } }); animator.start(); } }); }

WSCircleBar

WSCircleBar,WSCircleArc,WSCircleRise类似。

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setStyle(Paint.Style.FILL); mPaint.setStrokeWidth(circleRadius * BAR_RADIUS_RATIO); mPaint.setColor(Color.WHITE); //画背景 canvas.drawCircle(circleCenterX, circleCenterY, circleRadius, mPaint); //画bar RectF rect = new RectF(circleCenterX - circleRadius, circleCenterY - circleRadius, circleCenterX + circleRadius, circleCenterY + circleRadius); mPaint.setColor(Color.BLACK); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(mPaint.getStrokeWidth() * 2); canvas.drawArc(rect, startAngle, sweepAngle, false, mPaint); //画文字 mPaint.setStyle(Paint.Style.FILL); text = (int) (mValueAnimator * 100) + "%"; mPaint.setTextSize(mPaint.getStrokeWidth() * 2); canvas.drawText(text, circleCenterX - mPaint.measureText(text) / 2, circleCenterY + getFontHeight(mPaint, text) / 2, mPaint); } //开始动画 public void startAnimator() { post(new Runnable() { @Override public void run() { ValueAnimator animator = ValueAnimator.ofFloat(0f, 1.0f); animator.setDuration(5000); animator.setInterpolator(new LinearInterpolator()); animator.setRepeatMode(ValueAnimator.RESTART); animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { mValueAnimator = (float) valueAnimator.getAnimatedValue(); sweepAngle = 360 * mValueAnimator; postInvalidate(); } }); animator.start(); } }); }

在此非常感谢ldoublem 的效果图并通过代码实现了出来,我们实现进程有很多不同的地方。

LoadingView我会不断更新,敬请你的期待。

下载源码

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