package com.cheng.animationstudy.customview;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.BitmapDrawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import com.cheng.animationstudy.R;
import com.cheng.utils.UiUtil;
public class LeafLoadingView extends View {
private static final String TAG = "LeafLoadingView";
// 淡白色
private static final int WHITE_COLOR = 0xfffde399;
// 橙色
private static final int ORANGE_COLOR = 0xffffa800;
// 中等振幅大小
private static final int MIDDLE_AMPLITUDE = 13;
// 不同类型之间的振幅差距
private static final int AMPLITUDE_DISPARITY = 5;
// 总进度
private static final int TOTAL_PROGRESS = 100;
// 叶子飘动一个周期所花的时间
private static final long LEAF_FLOAT_TIME = 3000;
// 叶子旋转一周需要的时间
private static final long LEAF_ROTATE_TIME = 2000;
// 用于控制绘制的进度条距离左／上／下的距离
private static final int LEFT_MARGIN = 9;
// 用于控制绘制的进度条距离右的距离
private static final int RIGHT_MARGIN = 25;
private int mLeftMargin, mRightMargin;
// 中等振幅大小
private int mMiddleAmplitude = MIDDLE_AMPLITUDE;
// 振幅差
private int mAmplitudeDisparity = AMPLITUDE_DISPARITY;
// 叶子飘动一个周期所花的时间
private long mLeafFloatTime = LEAF_FLOAT_TIME;
// 叶子旋转一周需要的时间
private long mLeafRotateTime = LEAF_ROTATE_TIME;
private Resources mResources;
private Bitmap mLeafBitmap;
private int mLeafWidth, mLeafHeight;
private Bitmap mOuterBitmap;
private Rect mOuterSrcRect, mOuterDestRect;
private int mOuterWidth, mOuterHeight;
private int mTotalWidth, mTotalHeight;
private Paint mBitmapPaint, mWhitePaint, mOrangePaint;
private RectF mWhiteRectF, mOrangeRectF, mArcRectF;
// 当前进度
private int mProgress;
// 所绘制的进度条部分的宽度
private int mProgressWidth;
// 当前所在的绘制的进度条的位置
private int mCurrentProgressPosition;
// 弧形的半径
private int mArcRadius;
// arc的右上角的x坐标，也是矩形x坐标的起始点
private int mArcRightLocation;
// 用于产生叶子信息
private LeafFactory mLeafFactory;
// 产生出的叶子信息
private List<Leaf> mLeafInfos;
// 用于控制随机增加的时间不抱团
private int mAddTime;
public LeafLoadingView(Context context, AttributeSet attrs) {
super(context, attrs);
mResources = getResources();
mLeftMargin = UiUtil.dipToPx(context, LEFT_MARGIN);
mRightMargin = UiUtil.dipToPx(context, RIGHT_MARGIN);
mLeafFloatTime = LEAF_FLOAT_TIME;
mLeafRotateTime = LEAF_ROTATE_TIME;
initBitmap();
initPaint();
mLeafFactory = new LeafFactory();
mLeafInfos = mLeafFactory.generateLeafs();
}
private void initPaint() {
mBitmapPaint = new Paint();
mBitmapPaint.setAntiAlias(true);
mBitmapPaint.setDither(true);
mBitmapPaint.setFilterBitmap(true);
mWhitePaint = new Paint();
mWhitePaint.setAntiAlias(true);
mWhitePaint.setColor(WHITE_COLOR);
mOrangePaint = new Paint();
mOrangePaint.setAntiAlias(true);
mOrangePaint.setColor(ORANGE_COLOR);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// 绘制进度条和叶子
// 之所以把叶子放在进度条里绘制，主要是层级原因
drawProgressAndLeafs(canvas);
// drawLeafs(canvas);
canvas.drawBitmap(mOuterBitmap, mOuterSrcRect, mOuterDestRect, mBitmapPaint);
postInvalidate();
}
private void drawProgressAndLeafs(Canvas canvas) {
if (mProgress >= TOTAL_PROGRESS) {
mProgress = 0;
}
// mProgressWidth为进度条的宽度，根据当前进度算出进度条的位置
mCurrentProgressPosition = mProgressWidth * mProgress / TOTAL_PROGRESS;
// 即当前位置在图中所示1范围内
if (mCurrentProgressPosition < mArcRadius) {
Log.i(TAG, "mProgress = " + mProgress + "---mCurrentProgressPosition = "
+ mCurrentProgressPosition
+ "--mArcProgressWidth" + mArcRadius);
// 1.绘制白色ARC，绘制orange ARC
// 2.绘制白色矩形
// 1.绘制白色ARC
canvas.drawArc(mArcRectF, 90, 180, false, mWhitePaint);
// 2.绘制白色矩形
mWhiteRectF.left = mArcRightLocation;
canvas.drawRect(mWhiteRectF, mWhitePaint);
// 绘制叶子
drawLeafs(canvas);
// 3.绘制棕色 ARC
// 单边角度
int angle = (int) Math.toDegrees(Math.acos((mArcRadius - mCurrentProgressPosition)
/ (float) mArcRadius));
// 起始的位置
int startAngle = 180 - angle;
// 扫过的角度
int sweepAngle = 2 * angle;
Log.i(TAG, "startAngle = " + startAngle);
canvas.drawArc(mArcRectF, startAngle, sweepAngle, false, mOrangePaint);
} else {
Log.i(TAG, "mProgress = " + mProgress + "---transfer-----mCurrentProgressPosition = "
+ mCurrentProgressPosition
+ "--mArcProgressWidth" + mArcRadius);
// 1.绘制white RECT
// 2.绘制Orange ARC
// 3.绘制orange RECT
// 这个层级进行绘制能让叶子感觉是融入棕色进度条中
// 1.绘制white RECT
mWhiteRectF.left = mCurrentProgressPosition;
canvas.drawRect(mWhiteRectF, mWhitePaint);
// 绘制叶子
drawLeafs(canvas);
// 2.绘制Orange ARC
canvas.drawArc(mArcRectF, 90, 180, false, mOrangePaint);
// 3.绘制orange RECT
mOrangeRectF.left = mArcRightLocation;
mOrangeRectF.right = mCurrentProgressPosition;
canvas.drawRect(mOrangeRectF, mOrangePaint);
}
}
/**
* 绘制叶子
*
* @param canvas
*/
private void drawLeafs(Canvas canvas) {
mLeafRotateTime = mLeafRotateTime <= 0 ? LEAF_ROTATE_TIME : mLeafRotateTime;
long currentTime = System.currentTimeMillis();
for (int i = 0; i < mLeafInfos.size(); i++) {
Leaf leaf = mLeafInfos.get(i);
if (currentTime > leaf.startTime && leaf.startTime != 0) {
// 绘制叶子－－根据叶子的类型和当前时间得出叶子的（x，y）
getLeafLocation(leaf, currentTime);
// 根据时间计算旋转角度
canvas.save();
// 通过Matrix控制叶子旋转
Matrix matrix = new Matrix();
float transX = mLeftMargin + leaf.x;
float transY = mLeftMargin + leaf.y;
Log.i(TAG, "left.x = " + leaf.x + "--leaf.y=" + leaf.y);
matrix.postTranslate(transX, transY);
// 通过时间关联旋转角度，则可以直接通过修改LEAF_ROTATE_TIME调节叶子旋转快慢
float rotateFraction = ((currentTime - leaf.startTime) % mLeafRotateTime)
/ (float) mLeafRotateTime;
int angle = (int) (rotateFraction * 360);
// 根据叶子旋转方向确定叶子旋转角度
int rotate = leaf.rotateDirection == 0 ? angle + leaf.rotateAngle : -angle
+ leaf.rotateAngle;
matrix.postRotate(rotate, transX
+ mLeafWidth / 2, transY + mLeafHeight / 2);
canvas.drawBitmap(mLeafBitmap, matrix, mBitmapPaint);
canvas.restore();
} else {
continue;
}
}
}
private void getLeafLocation(Leaf leaf, long currentTime) {
long intervalTime = currentTime - leaf.startTime;
mLeafFloatTime = mLeafFloatTime <= 0 ? LEAF_FLOAT_TIME : mLeafFloatTime;
if (intervalTime < 0) {
return;
} else if (intervalTime > mLeafFloatTime) {
leaf.startTime = System.currentTimeMillis()
+ new Random().nextInt((int) mLeafFloatTime);
}
float fraction = (float) intervalTime / mLeafFloatTime;
leaf.x = (int) (mProgressWidth - mProgressWidth * fraction);
leaf.y = getLocationY(leaf);
}
// 通过叶子信息获取当前叶子的Y值
private int getLocationY(Leaf leaf) {
// y = A(wx+Q)+h
float w = (float) ((float) 2 * Math.PI / mProgressWidth);
float a = mMiddleAmplitude;
switch (leaf.type) {
case LITTLE:
// 小振幅 ＝ 中等振幅 － 振幅差
a = mMiddleAmplitude - mAmplitudeDisparity;
break;
case MIDDLE:
a = mMiddleAmplitude;
break;
case BIG:
// 小振幅 ＝ 中等振幅 + 振幅差
a = mMiddleAmplitude + mAmplitudeDisparity;
break;
default:
break;
}
Log.i(TAG, "---a = " + a + "---w = " + w + "--leaf.x = " + leaf.x);
return (int) (a * Math.sin(w * leaf.x)) + mArcRadius * 2 / 3;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
private void initBitmap() {
mLeafBitmap = ((BitmapDrawable) mResources.getDrawable(R.mipmap.leaf)).getBitmap();
mLeafWidth = mLeafBitmap.getWidth();
mLeafHeight = mLeafBitmap.getHeight();
mOuterBitmap = ((BitmapDrawable) mResources.getDrawable(R.mipmap.leaf_kuang)).getBitmap();
mOuterWidth = mOuterBitmap.getWidth();
mOuterHeight = mOuterBitmap.getHeight();
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mTotalWidth = w;
mTotalHeight = h;
mProgressWidth = mTotalWidth - mLeftMargin - mRightMargin;
mArcRadius = (mTotalHeight - 2 * mLeftMargin) / 2;
mOuterSrcRect = new Rect(0, 0, mOuterWidth, mOuterHeight);
mOuterDestRect = new Rect(0, 0, mTotalWidth, mTotalHeight);
mWhiteRectF = new RectF(mLeftMargin + mCurrentProgressPosition, mLeftMargin, mTotalWidth
- mRightMargin,
mTotalHeight - mLeftMargin);
mOrangeRectF = new RectF(mLeftMargin + mArcRadius, mLeftMargin,
mCurrentProgressPosition
, mTotalHeight - mLeftMargin);
mArcRectF = new RectF(mLeftMargin, mLeftMargin, mLeftMargin + 2 * mArcRadius,
mTotalHeight - mLeftMargin);
mArcRightLocation = mLeftMargin + mArcRadius;
}
private enum StartType {
LITTLE, MIDDLE, BIG
}
/**
* 叶子对象，用来记录叶子主要数据
*
* @author Ajian_Studio
*/
private class Leaf {
// 在绘制部分的位置
float x, y;
// 控制叶子飘动的幅度
StartType type;
// 旋转角度
int rotateAngle;
// 旋转方向--0代表顺时针，1代表逆时针
int rotateDirection;
// 起始时间(ms)
long startTime;
}
private class LeafFactory {
private static final int MAX_LEAFS = 8;
Random random = new Random();
// 生成一个叶子信息
public Leaf generateLeaf() {
Leaf leaf = new Leaf();
int randomType = random.nextInt(3);
// 随时类型－ 随机振幅
StartType type = StartType.MIDDLE;
switch (randomType) {
case 0:
break;
case 1:
type = StartType.LITTLE;
break;
case 2:
type = StartType.BIG;
break;
default:
break;
}
leaf.type = type;
// 随机起始的旋转角度
leaf.rotateAngle = random.nextInt(360);
// 随机旋转方向（顺时针或逆时针）
leaf.rotateDirection = random.nextInt(2);
// 为了产生交错的感觉，让开始的时间有一定的随机性
mLeafFloatTime = mLeafFloatTime <= 0 ? LEAF_FLOAT_TIME : mLeafFloatTime;
mAddTime += random.nextInt((int) (mLeafFloatTime * 2));
leaf.startTime = System.currentTimeMillis() + mAddTime;
return leaf;
}
// 根据最大叶子数产生叶子信息
public List<Leaf> generateLeafs() {
return generateLeafs(MAX_LEAFS);
}
// 根据传入的叶子数量产生叶子信息
public List<Leaf> generateLeafs(int leafSize) {
List<Leaf> leafs = new LinkedList<Leaf>();
for (int i = 0; i < leafSize; i++) {
leafs.add(generateLeaf());
}
return leafs;
}
}
/**
* 设置中等振幅
*
* @param amplitude
*/
public void setMiddleAmplitude(int amplitude) {
this.mMiddleAmplitude = amplitude;
}
/**
* 设置振幅差
*
* @param disparity
*/
public void setMplitudeDisparity(int disparity) {
this.mAmplitudeDisparity = disparity;
}
/**
* 获取中等振幅
*
* @param amplitude
*/
public int getMiddleAmplitude() {
return mMiddleAmplitude;
}
/**
* 获取振幅差
*
* @param disparity
*/
public int getMplitudeDisparity() {
return mAmplitudeDisparity;
}
/**
* 设置进度
*
* @param progress
*/
public void setProgress(int progress) {
this.mProgress = progress;
postInvalidate();
}
/**
* 设置叶子飘完一个周期所花的时间
*
* @param time
*/
public void setLeafFloatTime(long time) {
this.mLeafFloatTime = time;
}
/**
* 设置叶子旋转一周所花的时间
*
* @param time
*/
public void setLeafRotateTime(long time) {
this.mLeafRotateTime = time;
}
/**
* 获取叶子飘完一个周期所花的时间
*/
public long getLeafFloatTime() {
mLeafFloatTime = mLeafFloatTime == 0 ? LEAF_FLOAT_TIME : mLeafFloatTime;
return mLeafFloatTime;
}
/**
* 获取叶子旋转一周所花的时间
*/
public long getLeafRotateTime() {
mLeafRotateTime = mLeafRotateTime == 0 ? LEAF_ROTATE_TIME : mLeafRotateTime;
return mLeafRotateTime;
}
}