学习自/chen_zhang_yu/article/details/53396801#效果
只是学习了这个loading的创意，具体制作没有学，因为他是用surface view做的，我不会
不过也从他这里学到了drawPath的技巧，这里总结下
moveTo只移动
lineTo画直线
cubicTo和quadTo画曲线
arcTo画弧线
我的实现效果（很烂，因为透明度不知道为啥没实现好，我也懒得去弄了，因为项目没这需求，纯属兴趣爱好）
我的控制显隐是采用Handler+Value动画实现的
我的代码写的很烂，而且有严重的内存泄漏，如果想用到项目里去，还是用上面链接里的东西吧
全部代码
pojo
public class Hexagon {private int centerPointX; private int centerPointY; private float lenScale = 0; private int alpha = 0; private int len;//中心点到顶点距离 private int offsetX;//点到边的距离 private int[] vertexXArray = new int[6]; private int[] vertexYArray = new int[6]; public Hexagon(int centerPointX, int centerPointY, int len) {this.centerPointX = centerPointX; this.centerPointY = centerPointY; this.len = len; this.offsetX = (int) (len * 1.732 / 2); calculateVertex(); }//最上方顺时针开始 public void calculateVertex() {vertexXArray[0] = centerPointX; vertexXArray[1] = (int) (centerPointX + offsetX * lenScale); vertexXArray[2] = (int) (centerPointX + offsetX * lenScale); vertexXArray[3] = centerPointX; vertexXArray[4] = (int) (centerPointX - offsetX * lenScale); vertexXArray[5] = (int) (centerPointX - offsetX * lenScale); vertexYArray[0] = (int) (centerPointY + len * lenScale); vertexYArray[1] = (int) (centerPointY + len * lenScale / 2); vertexYArray[2] = (int) (centerPointY - len * lenScale / 2); vertexYArray[3] = (int) (centerPointY - len * lenScale); vertexYArray[4] = (int) (centerPointY - len * lenScale / 2); vertexYArray[5] = (int) (centerPointY + len * lenScale / 2); }private Path getPath() {Path path = new Path(); for (int i = 0; i < 6; i ++) {if (i == 0) {path.moveTo(vertexXArray[i], vertexYArray[i]); } else {path.lineTo(vertexXArray[i], vertexYArray[i]);//我这里没有移到最初点，最后会自动闭合吗 }}path.close(); return path; }public void drawHexagon(Canvas canvas, Paint paint) {paint.setAlpha(alpha); canvas.drawPath(getPath(), paint); }public void setLenScale(float lenScale) {this.lenScale = lenScale; }public void setAlpha(int alpha) {this.alpha = alpha; }}
view
//守望先锋loadingpublic class AssLoadingView extends View {public AssLoadingView(Context context, @Nullable AttributeSet attrs) {super(context, attrs); init(); }private int viewCenterX; private int viewCenterY; private int hexLen = 50; private int hexPadding = 0; private Hexagon[] hexagons = new Hexagon[7]; private Paint paint = new Paint(); private int i = 0; private ValueAnimator valueAnimator1; private ValueAnimator valueAnimator2; @SuppressLint("HandlerLeak")private android.os.Handler handler = new android.os.Handler() {@Override public void handleMessage(Message msg) {if (i % 14 <= 6) {valueAnimator1.start(); } else {valueAnimator2.start(); }this.sendEmptyMessageDelayed(0, 150); }}; private void init() {paint.setColor(Color.parseColor("#bec0c9")); viewCenterX = ScreenUtils.getScreenWidth(getContext()) / 2; viewCenterY = ScreenUtils.getScreenHeight(getContext()) / 2; int centerDistance = 2 * hexLen + hexPadding; int offsetX = centerDistance / 2; int offsetY = (int) (centerDistance * 1.732 / 2); hexagons[6] = new Hexagon(viewCenterX, viewCenterY, hexLen); int x = viewCenterX + offsetX; int y = viewCenterY + offsetY; hexagons[3] = new Hexagon(x, y, hexLen); x = viewCenterX + centerDistance; y = viewCenterY; hexagons[2] = new Hexagon(x, y, hexLen); x = viewCenterX + offsetX; y = viewCenterY - offsetY; hexagons[1] = new Hexagon(x, y, hexLen); x = viewCenterX - offsetX; y = viewCenterY - offsetY; hexagons[0] = new Hexagon(x, y, hexLen); x = viewCenterX - centerDistance; y = viewCenterY; hexagons[5] = new Hexagon(x, y, hexLen); x = viewCenterX - offsetX; y = viewCenterY + offsetY; hexagons[4] = new Hexagon(x, y, hexLen); valueAnimator1 = ValueAnimator.ofInt(0, 255); valueAnimator1.setDuration(120); valueAnimator1.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {@Override public void onAnimationUpdate(ValueAnimator animation) {int value = (int)animation.getAnimatedValue();hexagons[i % 7].setLenScale((float)value / 255);hexagons[i % 7].setAlpha(value);invalidate(); }}); valueAnimator1.addListener(new Animator.AnimatorListener() {@Override public void onAnimationStart(Animator animation) {}@Override public void onAnimationEnd(Animator animation) {i ++; }@Override public void onAnimationCancel(Animator animation) {}@Override public void onAnimationRepeat(Animator animation) {}}); valueAnimator2 = ValueAnimator.ofInt(255, 0); valueAnimator2.setDuration(120); valueAnimator2.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {@Override public void onAnimationUpdate(ValueAnimator animation) {int value = (int)animation.getAnimatedValue();hexagons[i % 7].setLenScale((float)value / 255);hexagons[i % 7].setAlpha(value);invalidate(); }}); valueAnimator2.addListener(new Animator.AnimatorListener() {@Override public void onAnimationStart(Animator animation) {}@Override public void onAnimationEnd(Animator animation) {i ++; }@Override public void onAnimationCancel(Animator animation) {}@Override public void onAnimationRepeat(Animator animation) {}}); handler.sendEmptyMessage(0); }@Override protected void onDraw(Canvas canvas) {super.onDraw(canvas); for (int i = 0; i < hexagons.length; i++) {hexagons[i].calculateVertex(); hexagons[i].drawHexagon(canvas, paint); }}}
