Android自定义View系列之Path绘制仿支付宝支付成功动画

//实例化对象
mCircleAnimator = ValueAnimator.ofFloat(0, 1);
//设置时长为1000ms
mCircleAnimator.setDuration(1000);
//开始动画
mCircleAnimator.start();
//设置动画监听
mCircleAnimator.addUpdateListener(this);

mCirclePercent = (float)animation.getAnimatedValue();
invalidate();

//画圆
mPathCircle.addCircle(getWidth() / 2, getWidth() / 2, getWidth() / 2 - mLineWidth, Path.Direction.CW);
mPathMeasure.setPath(mPathCircle, false);
mPathMeasure.getSegment(0, mCirclePercent * mPathMeasure.getLength(), mPathCircleDst, true);
canvas.drawPath(mPathCircleDst, mPaint);

package com.mintmedical.wavedemo;

import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PathMeasure;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

/**
 * Created by MooreLi on 2016/12/12.
 */

public class ResultAnimation extends View implements ValueAnimator.AnimatorUpdateListener {
 private Context mContext;
 /**
  * paint对象
  */
 private Paint mPaint;
 /**
  * Path和对应的空Path用来填充
  */
 private Path mPathCircle;
 private Path mPathCircleDst;
 private Path mPathRight;
 private Path mPathRightDst;
 private Path mPathWrong1;
 private Path mPathWrong2;
 private Path mPathWrong1Dst;
 private Path mPathWrong2Dst;
 /**
  * Path管理
  */
 private PathMeasure mPathMeasure;
 /**
  * 动画
  */
 private ValueAnimator mCircleAnimator;
 private ValueAnimator mRightAnimator;
 private ValueAnimator mWrong1Animator;
 private ValueAnimator mWrong2Animator;
 /**
  * 当前绘制进度占总Path长度百分比
  */
 private float mCirclePercent;
 private float mRightPercent;
 private float mWrong1Percent;
 private float mWrong2Percent;
 /**
  * 线宽
  */
 private int mLineWidth;
 /**
  * 正确动画 错误动画
  */
 public static final int RESULT_RIGHT = 1;
 public static final int RESULT_WROnG= 2;
 /**
  * 当前结果类型
  */
 private int mResultType = RESULT_WRONG;

 public ResultAnimation(Context context) {
  super(context);
  mCOntext= context;
  init();
 }

 public ResultAnimation(Context context, AttributeSet attrs) {
  super(context, attrs);
  mCOntext= context;
  init();
 }

 public ResultAnimation(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
  mCOntext= context;
  init();
 }

 private void init() {
  mLineWidth = dp2px(3);
  mPaint = new Paint();
  mPaint.setAntiAlias(true);
  mPaint.setStrokeWidth(mLineWidth);
  mPaint.setStyle(Paint.Style.STROKE);
  mPaint.setColor(Color.GREEN);

  initPath();
 }

 private void initPath() {
  mPathCircle = new Path();
  mPathCircleDst = new Path();
  mPathRight = new Path();
  mPathRightDst = new Path();
  mPathWrong1 = new Path();
  mPathWrong2 = new Path();
  mPathWrong1Dst = new Path();
  mPathWrong2Dst = new Path();

  mPathMeasure = new PathMeasure();

  //实例化对象
  mCircleAnimator = ValueAnimator.ofFloat(0, 1);
  //设置时长为1000ms
  mCircleAnimator.setDuration(1000);
  //开始动画
  mCircleAnimator.start();
  //设置动画监听
  mCircleAnimator.addUpdateListener(this);

  mRightAnimator = ValueAnimator.ofFloat(0, 1);
  mRightAnimator.setDuration(500);
  mRightAnimator.addUpdateListener(this);

  mWrong1Animator = ValueAnimator.ofFloat(0, 1);
  mWrong1Animator.setDuration(300);
  mWrong1Animator.addUpdateListener(this);
  mWrong2Animator = ValueAnimator.ofFloat(0, 1);
  mWrong2Animator.setDuration(300);
  mWrong2Animator.addUpdateListener(this);

 }

 @Override
 protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  if (mResultType == RESULT_RIGHT) {
   mPaint.setColor(Color.GREEN);
  } else {
   mPaint.setColor(Color.RED);
  }

  //画圆
  mPathCircle.addCircle(getWidth() / 2, getWidth() / 2, getWidth() / 2 - mLineWidth, Path.Direction.CW);
  mPathMeasure.setPath(mPathCircle, false);
  mPathMeasure.getSegment(0, mCirclePercent * mPathMeasure.getLength(), mPathCircleDst, true);
  canvas.drawPath(mPathCircleDst, mPaint);
  if (mResultType == RESULT_RIGHT) {
   //画对勾
   mPathRight.moveTo(getWidth() / 4, getWidth() / 2);
   mPathRight.lineTo(getWidth() / 2, getWidth() / 4 * 3);
   mPathRight.lineTo(getWidth() / 4 * 3, getWidth() / 4);
   if (mCirclePercent == 1) {
    mPathMeasure.nextContour();
    mPathMeasure.setPath(mPathRight, false);
    mPathMeasure.getSegment(0, mRightPercent * mPathMeasure.getLength(), mPathRightDst, true);
    canvas.drawPath(mPathRightDst, mPaint);
   }
  } else {
   mPathWrong1.moveTo(getWidth() / 4 * 3, getWidth() / 4);
   mPathWrong1.lineTo(getWidth() / 4, getWidth() / 4 * 3);

   mPathWrong2.moveTo(getWidth() / 4, getWidth() / 4);
   mPathWrong2.lineTo(getWidth() / 4 * 3, getWidth() / 4 * 3);

   if (mCirclePercent == 1) {
    mPathMeasure.nextContour();
    mPathMeasure.setPath(mPathWrong1, false);
    mPathMeasure.getSegment(0, mWrong1Percent * mPathMeasure.getLength(), mPathWrong1Dst, true);
    canvas.drawPath(mPathWrong1Dst, mPaint);
   }
   if (mWrong1Percent == 1) {
    mPathMeasure.nextContour();
    mPathMeasure.setPath(mPathWrong2, false);
    mPathMeasure.getSegment(0, mWrong2Percent * mPathMeasure.getLength(), mPathWrong2Dst, true);
    canvas.drawPath(mPathWrong2Dst, mPaint);
   }
  }
 }

 private int dp2px(int dp) {
  float scale = mContext.getResources().getDisplayMetrics().density;
  return (int) (scale * dp + 0.5f);
 }

 @Override
 public void onAnimationUpdate(ValueAnimator animation) {
  //圆形动画
  if (animation.equals(mCircleAnimator)) {
   mCirclePercent = (float) animation.getAnimatedValue();
   invalidate();
   Log.e("TEST","percent:"+mCirclePercent);
   if (mCirclePercent == 1) {
    if (mResultType == RESULT_RIGHT)
     mRightAnimator.start();
    else
     mWrong1Animator.start();
   }
  }
  //正确时 对勾动画
  else if (animation.equals(mRightAnimator)) {
   mRightPercent = (float) animation.getAnimatedValue();
   invalidate();
  }
  //错误时 右侧动画
  else if (animation.equals(mWrong1Animator)) {
   mWrong1Percent = (float) animation.getAnimatedValue();
   invalidate();
   if (mWrong1Percent == 1) {
    mWrong2Animator.start();
   }
  }
  //错误时 左侧动画
  else if (animation.equals(mWrong2Animator)) {
   mWrong2Percent = (float) animation.getAnimatedValue();
   invalidate();
  }
 }

 public void setmResultType(int mResultType) {
  this.mResultType = mResultType;
  invalidate();
 }

 /**
  * 固定写死了宽高，可重新手动调配
  *
  * @param widthMeasureSpec
  * @param heightMeasureSpec
  */
 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  setMeasuredDimension(dp2px(50), dp2px(50));
 }
}