Android自定义加载loading view动画组件

在github上找的一个有点酷炫的loading动画https://github.com/fichardu/circleprogress 

我写写使用步骤 

自定义view（circleprogress ）的代码 

package com.hysmarthotel.view;

import com.hysmarthotel.roomcontrol.r;
import com.hysmarthotel.util.easeinoutcubicinterpolator;

import android.animation.timeinterpolator;
import android.content.context;
import android.content.res.typedarray;
import android.graphics.canvas;
import android.graphics.paint;
import android.graphics.point;
import android.util.attributeset;
import android.view.view;
import android.view.animation.animationutils;

public class circleprogress extends view {

 private static final int red = 0xffe5282c;
 private static final int yellow = 0xff1f909a;
 private static final int blue = 0xfffc9e12;
 private static final int color_num = 3;
 private int[] colors;
 private timeinterpolator minterpolator = new easeinoutcubicinterpolator();

 private final double degree = math.pi / 180;
 private paint mpaint;
 private int mviewsize;
 private int mpointradius;
 private long mstarttime;
 private long mplaytime;
 private boolean mstartanim = false;
 private point mcenter = new point();

 private arcpoint[] marcpoint;
 private static final int point_num = 15;
 private static final int delta_angle = 360 / point_num;
 private long mduration = 3600;

 public circleprogress(context context) {
  super(context);
  init(null, 0);
 }

 public circleprogress(context context, attributeset attrs) {
  super(context, attrs);
  init(attrs, 0);
 }

 public circleprogress(context context, attributeset attrs, int defstyle) {
  super(context, attrs, defstyle);
  init(attrs, defstyle);
 }

 private void init(attributeset attrs, int defstyle) {
  marcpoint = new arcpoint[point_num];

  mpaint = new paint();
  mpaint.setantialias(true);
  mpaint.setstyle(paint.style.fill);

  typedarray a = getcontext().obtainstyledattributes(attrs, r.styleable.circleprogress, defstyle, 0);
  int color1 = a.getcolor(r.styleable.circleprogress_color1, red);
  int color2 = a.getcolor(r.styleable.circleprogress_color2, yellow);
  int color3 = a.getcolor(r.styleable.circleprogress_color3, blue);
  a.recycle();

  colors = new int[]{color1, color2, color3};
 }

 @override
 protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {
  int defaultsize = getresources().getdimensionpixelsize(r.dimen.default_circle_view_size);
  int width = getdefaultsize(defaultsize, widthmeasurespec);
  int height = getdefaultsize(defaultsize, heightmeasurespec);
  mviewsize = math.min(width, height);
  setmeasureddimension(mviewsize, mviewsize);
  mcenter.set(mviewsize / 2, mviewsize / 2);

  calpoints(1.0f);
 }

 @override
 protected void ondraw(canvas canvas) {
  canvas.save();
  canvas.translate(mcenter.x, mcenter.y);

  float factor = getfactor();
  canvas.rotate(36 * factor);
  float x, y;
  for (int i = 0; i < point_num; ++i) {
   mpaint.setcolor(marcpoint[i].color);
   float itemfactor = getitemfactor(i, factor);
   x = marcpoint[i].x - 2 * marcpoint[i].x * itemfactor;
   y = marcpoint[i].y - 2 * marcpoint[i].y * itemfactor;
   canvas.drawcircle(x, y, mpointradius, mpaint);
  }

  canvas.restore();

  if (mstartanim) {
   postinvalidate();
  }
 }

 private void calpoints(float factor) {
  int radius = (int) (mviewsize / 3 * factor);
  mpointradius = radius / 12;

  for (int i = 0; i < point_num; ++i) {
   float x = radius * -(float) math.sin(degree * delta_angle * i);
   float y = radius * -(float) math.cos(degree * delta_angle * i);

   arcpoint point = new arcpoint(x, y, colors[i % color_num]);
   marcpoint[i] = point;
  }
 }


 private float getfactor() {
  if (mstartanim) {
   mplaytime = animationutils.currentanimationtimemillis() - mstarttime;
  }
  float factor = mplaytime / (float) mduration;
  return factor % 1f;
 }

 private float getitemfactor(int index, float factor) {
  float itemfactor = (factor - 0.66f / point_num * index) * 3;
  if (itemfactor < 0f) {
   itemfactor = 0f;
  } else if (itemfactor > 1f) {
   itemfactor = 1f;
  }
  return minterpolator.getinterpolation(itemfactor);
 }

 public void startanim() {
  mplaytime = mplaytime % mduration;
  mstarttime = animationutils.currentanimationtimemillis() - mplaytime;
  mstartanim = true;
  postinvalidate();
 }

 public void reset() {
  stopanim();
  mplaytime = 0;
  postinvalidate();

 }

 public void stopanim() {
  mstartanim = false;
 }

 public void setinterpolator(timeinterpolator interpolator) {
  minterpolator = interpolator;
 }

 public void setduration(long duration) {
  mduration = duration;
 }

 public void setradius(float factor) {
  stopanim();
  calpoints(factor);
  startanim();
 }

 static class arcpoint {
  float x;
  float y;
  int color;

  arcpoint(float x, float y, int color) {
   this.x = x;
   this.y = y;
   this.color = color;
  }
 }

}

easeinoutcubicinterpolator是自定义view（circleprogress ）中要是用的一个工具 

package com.hysmarthotel.util;

import android.animation.timeinterpolator;


public class easeinoutcubicinterpolator implements timeinterpolator {

 @override
 public float getinterpolation(float input) {
  if ((input *= 2) < 1.0f) {
   return 0.5f * input * input * input;
  }
  input -= 2;
  return 0.5f * input * input * input + 1;
 }

}

在activity中的调用（还有一些其他用法可以自己看看github上的源代码） 

mprogressview = (circleprogress)findviewbyid(r.id.progress_vie);
mprogressview.startanim(); //开始
mprogressview.stopanim(); //结束
mprogressview.setradius(factor); //半径
mprogressview.reset(); //复原

在xml文件中的布局 

<?xml version="1.0" encoding="utf-8"?>
<absolutelayout 
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:circleprogress="http://schemas.android.com/apk/res/com.hysmarthotel.roomcontrol"  //这个地方记得要加 //包名
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="@drawable/bg1" >
 
 <com.hysmarthotel.view.circleprogress                   //类名
  android:id="@+id/progress_vie"
  android:layout_x="350.5px"
  android:layout_y="150.0px"
  android:layout_width="1140.0px"
  android:layout_height="700.0px"
  circleprogress:color1="@android:color/holo_red_light"   //这些参数就是通过xmlns:circleprogress，和attrs文件相关联的 　　　　circleprogress:color2="@android:color/holo_green_light" 　　　　circleprogress:color3="@android:color/holo_blue_light" />

自己在values目录中新建的attrs文件，这是与自定义view中自定义参数相关的

 <declare-styleable name="circleprogress">
  <attr name="color1" format="reference|color"/>
  <attr name="color2" format="reference|color"/>
  <attr name="color3" format="reference|color"/>
 </declare-styleable> 

自己在values目录中新建的dimens文件，这个只是几个颜色参数

 <?xml version="1.0" encoding="utf-8"?>
<resources>
 <dimen name="activity_horizontal_margin">16dp</dimen>
 <dimen name="activity_vertical_margin">16dp</dimen>
 <dimen name="default_circle_view_size">200dp</dimen>
</resources>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。