目录前言自定义圆球动态随机添加小球前言 最近公司产品突然有一个类似支付宝蚂蚁森林的功能,大致功能跟支付宝蚂蚁森林相像,在看了一下支付宝蚂蚁森林的效果之后,打算先撸一个控件出来,等公司
最近公司产品突然有一个类似支付宝蚂蚁森林的功能,大致功能跟支付宝蚂蚁森林相像,在看了一下支付宝蚂蚁森林的效果之后,打算先撸一个控件出来,等公司效果图出来之后就可以放上去直接使用。
首先我们先大致看下支付宝的蚂蚁森林效果图:
这是目前我实现的效果图:
当我们拿到这个需求时先分析一波,不要忙着就动手开干,不然容易平地翻车。。
需要实现的功能有:
1、自定小圆球,圆球内文字、上下浮动、消失动画;
2、根据数据动态添加小球,并且位置随机分布在小树周围,不能重叠。这点是最重要的,涉及到一个随机位置生成算法的设计。
好了,当我们确定了我们要实现的功能之后就可以逐步开始撸代码了。
这个比较容易实现,绘制一个圆,再在园内绘制文字,动画实现统一采用的是属性动画来实现,代码如下,注释写的比较详细就不一一解释了,懒...
public class WaterView extends View {
private Paint paint;
private ObjectAnimator mAnimator;
private int textColor = Color.parseColor("#69c78e");
private int waterColor = Color.parseColor("#c3f593");
private int storkeColor = Color.parseColor("#69c78e");
private float strokeWidth = 0.5f;
private float textSize = 36;
private float proportion;
private int mRadius = 30;
private String textContent="3g";
public WaterView(Context context) {
super(context);
init();
}
public WaterView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
init();
}
public WaterView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init() {
paint = new Paint();
paint.setAntiAlias(true);
}
@Override
public void draw(canvas canvas) {
super.draw(canvas);
drawCircleView(canvas);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setMeasuredDimension(Utils.dp2px(getContext(), (int) (2 * (mRadius+strokeWidth))),Utils.dp2px(getContext(), (int) (2 * (mRadius+strokeWidth))));
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
start();
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
stop();
}
@Override
protected void onVisibilityChanged(@NonNull View changedView, int visibility) {
super.onVisibilityChanged(changedView, visibility);
if (visibility == VISIBLE) {
start();
} else {
stop();
}
}
private void drawCircleView(Canvas canvas){
//圆球
paint.setColor(waterColor);
paint.setStyle(Paint.Style.FILL);
canvas.drawCircle(Utils.dp2px(getContext(), mRadius), Utils.dp2px(getContext(), mRadius), Utils.dp2px(getContext(), mRadius), paint);
//描边
paint.setColor(storkeColor);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(Utils.dp2px(getContext(), (int) strokeWidth));
canvas.drawCircle(Utils.dp2px(getContext(), mRadius), Utils.dp2px(getContext(), mRadius), Utils.dp2px(getContext(), (int) (mRadius+strokeWidth)) , paint);
//圆球文字
paint.setTextSize(textSize);
paint.setColor(textColor);
paint.setStyle(Paint.Style.FILL);
drawVerticalText(canvas, Utils.dp2px(getContext(), mRadius), Utils.dp2px(getContext(), mRadius), textContent);
}
private void drawVerticalText(Canvas canvas, float centerX, float centerY, String text) {
Paint.FontMetrics fontMetrics = paint.getFontMetrics();
float baseLine = -(fontMetrics.ascent + fontMetrics.descent) / 2;
float textWidth = paint.measureText(text);
float startX = centerX - textWidth / 2;
float endY = centerY + baseLine;
canvas.drawText(text, startX, endY, paint);
}
public void start() {
if (mAnimator == null) {
mAnimator = ObjectAnimator.ofFloat(this, "translationY", -6.0f, 6.0f, -6.0f);
mAnimator.setDuration(3500);
mAnimator.setInterpolator(new LinearInterpolator());
mAnimator.setRepeatMode(ValueAnimator.RESTART);
mAnimator.setRepeatCount(ValueAnimator.INFINITE);
mAnimator.start();
} else if (!mAnimator.isStarted()) {
mAnimator.start();
}
}
public void stop() {
if (mAnimator != null) {
mAnimator.cancel();
mAnimator = null;
}
}
public float getProportion() {
return proportion;
}
public void setProportion(float proportion) {
this.proportion = proportion;
}
}
这里我采用的是集成FrameLayout 通过设置小球数据,动态将小球add进去,比较简便,在这里最重要是动态随机添加小球的算法,解决了这个算法就好办了。通过仔细观察支付宝蚂蚁森林的效果实现,我们可以发现一般小球都是在树的正上方随机分布的。所以我想以小树的根为中心,小树的高度为半径为一个扇形,在这个扇形上方随机摆放小球。
公式:坐标 = 旋转角度 * 半径 * 根据远近距离的不同计算得到的应该占的半径比例
圆上任一点(x1,y1)坐标的计算公式:
x1 = x0 + r * cos(ao * 3.14 /180 )
y1 = y0 + r * sin(ao * 3.14 /180 )
具体实现代码如下:
public class WaterFlake extends FrameLayout {
private OnWaterItemListener mOnWaterItemListener;
private float treeCenterX = 0;
private float treeCenterY = 0;
private int radius = 80;
private double mStartAngle = 0;
private boolean isCollect = false;
public WaterFlake(@NonNull Context context) {
super(context);
}
public WaterFlake(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
}
public WaterFlake(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
int x = (int) event.getX();
int y = (int) event.getY();
Rect rect = new Rect();
for (int i = 0; i < getChildCount(); i++) {
getChildAt(i).getHitRect(rect);
if (rect.contains(x, y)) {
if (mOnWaterItemListener != null) {
getChildAt(i).perfORMClick();
mOnWaterItemListener.onItemClick(i);
startAnimator(getChildAt(i));
return true;
}
}
}
}
return super.onTouchEvent(event);
}
@Override
public boolean performClick() {
return super.performClick();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
measureChildren(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
int childCount = getChildCount();
if (childCount==0){
return;
}
int left, top;
// 根据tem的个数,计算角度
float angleDelay = -180 / childCount;
for (int i = 0; i < childCount; i++) {
WaterView child = (WaterView) getChildAt(i);
mStartAngle %= 180;
//设置CircleView小圆点的坐标信息
//坐标 = 旋转角度 * 半径 * 根据远近距离的不同计算得到的应该占的半径比例
// 则圆上任一点为:(x1,y1)
// x1 = x0 + r * cos(ao * 3.14 /180 )
// y1 = y0 + r * sin(ao * 3.14 /180 )
if (child.getVisibility() != GoNE) {
left = (int) (getTreeCenterX() + radius * Math.cos(mStartAngle * 3.14 / 180) * (child.getProportion() / radius * 2));
top = (int) (getTreeCenterY() + radius * Math.sin(mStartAngle * 3.14 / 180) * (child.getProportion() / radius * 2));
child.layout(left, top, left + child.getMeasuredWidth(), top + child.getMeasuredWidth());
}
mStartAngle += angleDelay;
}
}
public void setModelList(List<WaterModel> modelList, float treeCenterX, float treeCenterY) {
this.treeCenterX = treeCenterX;
this.treeCenterY = treeCenterY;
for (int i = 0; i < modelList.size(); i++) {
WaterView waterView = new WaterView(getContext(),(i+1)+"g");
waterView.setProportion(Utils.getRandom(radius, radius + 80));
addView(waterView);
}
}
public void setOnWaterItemListener(OnWaterItemListener onWaterItemListener) {
mOnWaterItemListener = onWaterItemListener;
}
public interface OnWaterItemListener {
void onItemClick(int pos);
}
private void startAnimator(final View view) {
if (isCollect) {
return;
}
isCollect = true;
ObjectAnimator translatAnimatorY = ObjectAnimator.ofFloat(view, "translationY", getTreeCenterY());
translatAnimatorY.start();
ObjectAnimator alphaAnimator = ObjectAnimator.ofFloat(view, "alpha", 1f, 0f);
alphaAnimator.start();
AnimatorSet animatorSet = new AnimatorSet();
animatorSet.play(translatAnimatorY).with(alphaAnimator);
animatorSet.setDuration(3000);
animatorSet.start();
animatorSet.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
removeViewInLayout(view);
isCollect = false;
}
});
}
public float getTreeCenterX() {
return treeCenterX;
}
public float getTreeCenterY() {
return treeCenterY;
}
}
小球摆放随机算法有多种实现方式,这只是其中一种,写的不好的地方,还望各位指正,欢迎大家一起交流学习。
目前代码还有一些地方需要完善的,逐步更新。。。
TODO
优化小球随机生成算法,保证每个小球尽量不会重叠
到此这篇关于Android模拟实现支付宝蚂蚁森林效果的文章就介绍到这了,更多相关Android蚂蚁森林内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网!
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本文标题: Android模拟实现支付宝蚂蚁森林效果
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