仿爱奇艺加载dialog

仿爱奇艺在加载视频时的动画，想上张图；

gif的效果有点卡，先说一下实现的方法，

主要的难点在于怎样将三角形画到空间的中间，我通过三角形中心到顶角的距离来确定三角形的大小，

当三角形在中间时角a的大小为60度，线段A的长度为已知的自己设定的，我这里设定的为40像素，则C的长度为

A乘以sin(a) B的长度为A乘以cos(a); 这里假设空间的长宽各位200的正方形，所以三角形的上顶点的坐标为（100,60），左下顶点为（200 / 2 - A * cos(a)）,右顶点的坐标为（200 / 2，A* sin(a)）,确定了三角形的三个顶点就可以在通过drawPath画三角形了，代码如下：

path.moveTo(width / 2, height / 2 - length);
path.lineTo(formantNumber(width / 2 - Math.sin(Math.PI / 3) * length), width / 2 + length / 2);
path.lineTo(formantNumber(width / 2 + Math.sin(Math.PI / 3) * length), width / 2 + length / 2);
path.close();

当布局加载完成后开始动画，由于但旋转的时候弧形的扫过的角度为360度，旋转时看不出来圆弧的旋转，

/**
 * 布局加载完成后开始动画
 */
@Override
protected void onFinishInflate() {super.onFinishInflate();startAnimation(rotateAnimation);
}

/**
 * 初始化动画
 */
private void initRouteAnimation() {rotateAnimation = new RotateAnimation(0, 1800, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);rotateAnimation.setInterpolator(new AccelerateDecelerateInterpolator());rotateAnimation.setDuration(1500);rotateAnimation.setFillAfter(false);rotateAnimation.setAnimationListener(this);
}

当动画执行完后将将扫过的角度设置为0度，重新绘制

/**
 * 动画介绍后的回调
 *
 * @param animation
 */
@Override
public void onAnimationEnd(Animation animation) {sweepAngle = 0;isAfterAnimation = true;invalidate();
}

下面是onDraw方法的代码，我在这里判断当扫过的角度为330度的时候，也就是sweepAngle为360的时候，重绘视图，然后开启动画

@Override
protected void onDraw(Canvas canvas) {super.onDraw(canvas);if (isAfterAnimation) {sweepAngle += 30;if (sweepAngle >= 360) {isAfterAnimation = false;drawPicture(canvas, 360);startAnimation(rotateAnimation);} else {drawPicture(canvas, sweepAngle);postInvalidateDelayed(30);}} else {drawPicture(canvas, 360);}
}

下面是重写onMeasure方法的代码，在measureWidth方法中判断计算模式，返回空间的宽度，计算模式为wrap_content的时候宽度为200px，计算高度的方法一样，这里不再累赘；

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec);width = measureWidth(widthMeasureSpec);height = measureHeight(heightMeasureSpec);setMeasuredDimension(measureWidth(widthMeasureSpec), measureHeight(heightMeasureSpec));
}

/**
 * 计算控件宽度
 *
 * @param widthMeasureSpec
 * @return
 */
private int measureWidth(int widthMeasureSpec) {int result = 0;int mode = MeasureSpec.getMode(widthMeasureSpec);int size = MeasureSpec.getSize(widthMeasureSpec);if (mode == MeasureSpec.EXACTLY) {result = size;} else {result = 200;if (mode == MeasureSpec.AT_MOST) {result = Math.min(result, size);}}return result;
}

完整代码：

package com.example.mengsong.demo01;/**
 * Created by MengSong on 2016/12/20.
 */

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.widget.TextView;/**
 * Created by MengSong on 2016/12/15.
 */
public class MyView extends View implements Animation.AnimationListener {//绘制三角形的路径
    private Path path;//绘制三角形的画笔
    public Paint mPaintTriangle;//绘制弧形的画笔
    public Paint mPaintArc;//三角形的中心到顶点的距离
    private int length = 40;//圆弧的半径
    private int arcRadius = 80;//圆弧扫过的角度
    private float sweepAngle = 360;private boolean isAfterAnimation = false;//旋转动画
    private RotateAnimation rotateAnimation;//圆弧所在的矩形
    private RectF rect;//空间的宽度
    private int width;//控件的高度
    private int height;public MyView(Context context) {super(context);init();}public MyView(Context context, AttributeSet attrs) {super(context, attrs);init();}/**
     * 布局加载完成后开始动画
     */
    @Override
    protected void onFinishInflate() {super.onFinishInflate();startAnimation(rotateAnimation);}/**
     * 初始化相关属性
     */
    private void init() {mPaintTriangle = new Paint();mPaintTriangle.setDither(true);mPaintTriangle.setAntiAlias(true);mPaintTriangle.setStyle(Paint.Style.FILL);mPaintTriangle.setColor(Color.GREEN);mPaintArc = new Paint();mPaintArc.setDither(true);mPaintArc.setAntiAlias(true);mPaintArc.setStrokeWidth(3);mPaintArc.setStyle(Paint.Style.STROKE);mPaintArc.setColor(Color.GREEN);path = new Path();initRouteAnimation();}/**
     * 初始化三角形的path弧形的所在的矩形
     *
     * @param w
     * @param h
     * @param oldw
     * @param oldh
     */
    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {super.onSizeChanged(w, h, oldw, oldh);rect = new RectF(width / 2 - arcRadius, height / 2 - arcRadius, width / 2 + arcRadius, height / 2 + arcRadius);path.moveTo(width / 2, height / 2 - length);path.lineTo(formantNumber(width / 2 - Math.sin(Math.PI / 3) * length), width / 2 + length / 2);path.lineTo(formantNumber(width / 2 + Math.sin(Math.PI / 3) * length), width / 2 + length / 2);path.close();}@Override
    protected void onDraw(Canvas canvas) {super.onDraw(canvas);if (isAfterAnimation) {sweepAngle += 30;if (sweepAngle >= 360) {isAfterAnimation = false;drawPicture(canvas, 360);startAnimation(rotateAnimation);} else {drawPicture(canvas, sweepAngle);postInvalidateDelayed(30);}} else {drawPicture(canvas, 360);}}private void drawPicture(Canvas canvas, float sweepAngle) {//画三角形
        canvas.drawPath(path, mPaintTriangle);//画扇形
        canvas.drawArc(rect, 270, sweepAngle, false, mPaintArc);}/**
     * 保留四位小数
     *
     * @param number
     * @return
     */
    private float formantNumber(double number) {java.text.DecimalFormat df = new java.text.DecimalFormat("#.####");String format = df.format(number);return Float.valueOf(format.trim());}/**
     * 动画介绍后的回调
     *
     * @param animation
     */
    @Override
    public void onAnimationEnd(Animation animation) {sweepAngle = 0;isAfterAnimation = true;invalidate();}@Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec);width = measureWidth(widthMeasureSpec);height = measureHeight(heightMeasureSpec);setMeasuredDimension(measureWidth(widthMeasureSpec), measureHeight(heightMeasureSpec));}/**
     * 计算控件宽度
     *
     * @param widthMeasureSpec
     * @return
     */
    private int measureWidth(int widthMeasureSpec) {int result = 0;int mode = MeasureSpec.getMode(widthMeasureSpec);int size = MeasureSpec.getSize(widthMeasureSpec);if (mode == MeasureSpec.EXACTLY) {result = size;} else {result = 200;if (mode == MeasureSpec.AT_MOST) {result = Math.min(result, size);}}return result;}/**
     * 计算控件高度
     *
     * @param heightMeasureSpec
     * @return
     */
    private int measureHeight(int heightMeasureSpec) {int result = 0;int mode = MeasureSpec.getMode(heightMeasureSpec);int size = MeasureSpec.getSize(heightMeasureSpec);if (mode == MeasureSpec.EXACTLY) {result = size;} else {result = 200;if (mode == MeasureSpec.AT_MOST) {result = Math.min(result, size);}}return result;}/**
     * 初始化动画
     */
    private void initRouteAnimation() {rotateAnimation = new RotateAnimation(0, 1800, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);rotateAnimation.setInterpolator(new AccelerateDecelerateInterpolator());rotateAnimation.setDuration(1500);rotateAnimation.setFillAfter(false);rotateAnimation.setAnimationListener(this);}@Override
    public void onAnimationStart(Animation animation) {}@Override
    public void onAnimationRepeat(Animation animation) {}
}

仿爱奇艺加载dialog相关推荐

android高仿奇艺影视,android仿爱奇艺加载动画实例
本篇文章介绍了android仿爱奇艺加载动画实例,具体代码如下: 效果图: 用到的知识点: Path ValueAnimator 如果对Path和ValueAnimator还不熟悉推荐去看这几个大神的 ...
html实现视频网站,仿爱奇艺,搜狐,迅雷看看(附源码)
文章目录 1.功能模板 1.1 仿爱奇艺 1.2 仿搜狐视频 1.3 仿迅雷看看 1.4 视频播放 1.5 影视公司官网 2.效果和源码 2.1 源代码 2.2 模板目录源码下载作者:xcLeig ...
仿爱奇艺UI界面(第一天)
仿爱奇艺UI界面 1.整体布局是一个Activity,再一个Activity界面中填充不同的Fragment. 主界面是一个LinearLayout布局,在布局中放一个FrameLayout用来做显 ...
爱奇艺首页底部导航按钮android,仿爱奇艺/腾讯视频ViewPager导航条实现
仿爱奇艺/腾讯视频ViewPager导航条实现,支持自定义导航条高度,宽度,颜色变化,字体大小变化.支持多种滚动模式,支持自定义每个TabView的样式.项目地址:https://github.com ...
苹果cms v8模板高仿爱奇艺带PC+手机模板
介绍: 苹果cms v8模板高仿爱奇艺带PC+手机模板网盘下载地址: http://kekewl.net/frgNDYcaQne0 图片:
仿爱奇艺视频，腾讯视频，搜狐视频首页推荐位轮播图（二）之SuperIndicator源码分析
转载请把头部出处链接和尾部二维码一起转载,本文出自逆流的鱼:http://blog.csdn.net/hejjunlin/article/details/52510431 背景:仿爱奇艺视频,腾讯视频 ...
仿爱奇艺视频，腾讯视频，搜狐视频首页推荐位轮播图介绍（一）
请尊重分享成果,转载请注明出处:http://blog.csdn.net/hejjunlin/article/details/52327435 前言:本篇只是一个介绍这个一个类库,具体实现思路代码会下 ...
Android源码之高仿爱奇艺
Android源码之高仿爱奇艺支持平台:Android 运行环境:Eclipse 开发语言:Java 下载地址:http://www.devstore.cn/code/info/306.h ...
仿爱奇艺H5电影站v1.1源码
简介: 一个近乎纯前端的H5影视程序,高仿爱奇艺APP界面,资源全面,更新及时,搜索功能强大,VIP影视免费看,微商公号吸粉利器.本影视站源码采用PHP实时抓取可用资源,以文本缓存方式缓存存储,程序运 ...

仿爱奇艺加载dialog

仿爱奇艺加载dialog相关推荐

最新文章

热门文章