水波扩散效果代码,Java代码库,德仔网

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【Java】水波扩散效果
作者:Tobe1 / 发布于2014/12/13/ 634

	package com.phodev.andtools.widget;
	
	import java.util.ArrayList;
	import java.util.List;
	
	import android.content.Context;
	import android.graphics.Canvas;
	import android.graphics.Color;
	import android.graphics.Paint;
	import android.graphics.Paint.Style;
	import android.util.AttributeSet;
	import android.view.View;
	import android.view.animation.CycleInterpolator;
	import android.view.animation.Interpolator;
	
	/**
	* 水波效果
	*
	* @author sky
	*
	*/
	public class WaterWaveView extends View {
	 private final static int FPS = 1000 / 40;
	 private float mMaxWaveAreaRadius;
	 private float mWaveIntervalSize;
	 private float mStirStep;// 波移动的步幅
	 private float mWaveStartWidth;// px
	 private float mWaveEndWidth;// px
	 private int mWaveColor;
	 /** 颜色渐变控制器 */
	 private Interpolator interpolator = new CycleInterpolator(0.5f);
	 private float mViewCenterX;
	 private float mViewCenterY;
	 private final Paint mWavePaint = new Paint();
	 {
	 mWavePaint.setAntiAlias(true);
	 mWavePaint.setStyle(Style.STROKE);
	 }
	 private final Paint mWaveCenterShapePaint = new Paint();
	 {
	 mWaveCenterShapePaint.setAntiAlias(true);
	 mWaveCenterShapePaint.setStyle(Style.FILL);
	 }
	 private boolean mFillAllView = false;
	 private float mFillWaveSourceShapeRadius;
	 private final List<Wave> mWaves = new ArrayList<Wave>();
	
	 public WaterWaveView(Context context, AttributeSet attrs) {
	 super(context, attrs);
	 init();
	 }
	
	 public WaterWaveView(Context context) {
	 super(context);
	 init();
	 }
	
	 private void init() {
	 setWaveInfo(60f, 2f, 2f, 15f, Color.BLUE);
	 }
	
	 @Override
	 protected void onLayout(boolean changed, int left, int top, int right,
	 int bottom) {
	 super.onLayout(changed, left, top, right, bottom);
	 mViewCenterX = getWidth() / 2;
	 mViewCenterY = getHeight() / 2;
	 float waveAreaRadius = mMaxWaveAreaRadius;
	 if (mFillAllView) {
	 waveAreaRadius = (float) Math.sqrt(mViewCenterX * mViewCenterX
	 + mViewCenterY * mViewCenterY);
	 } else {
	 waveAreaRadius = Math.min(mViewCenterX, mViewCenterY);
	 }
	 if (mMaxWaveAreaRadius != waveAreaRadius) {
	 mMaxWaveAreaRadius = waveAreaRadius;
	 resetWave();
	 }
	 }
	
	 @Override
	 protected void onDraw(Canvas canvas) {
	 super.onDraw(canvas);
	 stir();
	 for (Wave w : mWaves) {
	 mWavePaint.setColor(w.color);
	 mWavePaint.setStrokeWidth(w.width);
	 canvas.drawCircle(mViewCenterX, mViewCenterY, w.radius, mWavePaint);
	 }
	 if (mFillWaveSourceShapeRadius > 0f) {
	 canvas.drawCircle(mViewCenterX, mViewCenterY,
	 mFillWaveSourceShapeRadius, mWaveCenterShapePaint);
	 }
	 postInvalidateDelayed(FPS);
	 }
	
	 /**
	 * 波
	 *
	 * @author sky
	 */
	 class Wave {
	 public float radius;
	 public float width;
	 public int color;
	
	 public Wave() {
	 reset();
	 }
	
	 public void reset() {
	 radius = 0;
	 width = mWaveStartWidth;
	 color = mWaveColor;
	 }
	
	 @Override
	 public String toString() {
	 return "Wave [radius=" + radius + ", width=" + width + ", color="
	 + color + "]";
	 }
	
	 }
	
	 private Wave mLastRmoveWave;
	
	 /**
	 * 触发涌动传播
	 */
	 private void stir() {
	 Wave nearestWave = mWaves.isEmpty() ? null : mWaves.get(0);
	 if (nearestWave == null || nearestWave.radius >= mWaveIntervalSize) {
	 Wave w = null;
	 if (mLastRmoveWave != null) {
	 w = mLastRmoveWave;
	 mLastRmoveWave = null;
	 w.reset();
	 } else {
	 w = new Wave();
	 }
	 mWaves.add(0, w);
	 }
	 float waveWidthIncrease = mWaveEndWidth - mWaveStartWidth;
	 int size = mWaves.size();
	 for (int i = 0; i < size; i++) {
	 Wave w = mWaves.get(i);
	 float rP = w.radius / mMaxWaveAreaRadius;
	 if (rP > 1f) {
	 rP = 1f;
	 }
	 w.width = mWaveStartWidth + rP * waveWidthIncrease;
	 w.radius += mStirStep;
	 float factor = interpolator.getInterpolation(rP);
	 w.color = mWaveColor & 0x00FFFFFF | ((int) (255 * factor) << 24);
	 }
	 Wave farthestWave = mWaves.get(size - 1);
	 if (farthestWave.radius > mMaxWaveAreaRadius + farthestWave.width / 2) {
	 mWaves.remove(size - 1);
	 }
	 }
	
	 /**
	 * 如果true会选择view的最大的对角线作为活动半径
	 *
	 * @param fillAllView
	 */
	 public void setFillAllView(boolean fillAllView) {
	 mFillAllView = fillAllView;
	 resetWave();
	 }
	
	 public void resetWave() {
	 mWaves.clear();
	 postInvalidate();
	 }
	
	 /**
	 * 填充波形起源的中心点
	 *
	 * @param radius
	 * 半径大小
	 */
	 public void setFillWaveSourceShapeRadius(float radius) {
	 mFillWaveSourceShapeRadius = radius;
	 }
	
	 /**
	 * 设置波形属性
	 *
	 * @param intervalSize
	 * 两个波形之间的间距
	 * @param stireStep
	 * 波形移动速度
	 * @param startWidth
	 * 起始波形宽度
	 * @param endWidth
	 * 终止波形宽度
	 * @param color
	 * 波形颜色
	 */
	 public void setWaveInfo(float intervalSize, float stireStep,
	 float startWidth, float endWidth, int color) {
	 mWaveIntervalSize = intervalSize;
	 mStirStep = stireStep;
	 mWaveStartWidth = startWidth;
	 mWaveEndWidth = endWidth;
	 setWaveColor(color);
	 resetWave();
	 }
	
	 /**
	 * 设置波形颜色
	 *
	 * @param color
	 */
	 public void setWaveColor(int color) {
	 mWaveColor = color;
	 mWaveCenterShapePaint.setColor(mWaveColor);
	 }
	
	}
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　水波扩散　
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