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Android自定义view绘制圆环占比动画

2019年07月24日  | 移动技术网移动技术  | 我要评论

一、实现效果图

二、核心代码

1.自定义myprogressview.java

package com.czhappy.effectdemo.view;

import android.content.context;
import android.content.res.typedarray;
import android.graphics.bitmap;
import android.graphics.bitmapfactory;
import android.graphics.canvas;
import android.graphics.color;
import android.graphics.paint;
import android.graphics.paint.fontmetrics;
import android.graphics.rect;
import android.graphics.rectf;
import android.os.handler;
import android.os.message;
import android.text.textutils;
import android.util.attributeset;
import android.view.view;

import com.czhappy.effectdemo.r;
import com.czhappy.effectdemo.utils.screenutil;


public class myprogressview extends view {

 // 画实心圆的画笔
 private paint mcirclepaint;
 // 画圆环的画笔
 private paint mringdefaultpaint;
 // 已用环的画笔
 private paint musepaint;
 // 画圆环的画笔
 private paint mringpaint;
 // 画白线的画笔
 private paint mlinepaint;
 // 画字体的画笔
 private paint mtextpaint;
 // 圆形颜色
 private int mcirclecolor;
 // 圆环颜色
 private int mringcolor;
 // 半径
 private float mradius;
 // 圆环半径
 private float mringradius;
 // 圆环宽度
 private float mstrokewidth;
 // 圆心x坐标
 private int mxcenter;
 // 圆心y坐标
 private int mycenter;
 // 字的长度
 private float mtxtwidth;
 // 字的高度
 private float mtxtheight;
 // 总进度
 private int mtotalprogress = 100;
 // 当前进度
 private int mprogress;
 // 实际展示总进度
 private int mshowprogress;
 // 已用流量
 private string usedflow;

 private context mcontext;

 private handler circlehandler = new handler(){

  public void handlemessage(message msg) {
   super.handlemessage(msg);
   if(msg.what == 1){
    int temp = (integer)msg.obj;
    setprogress(temp);
   }
  };
 };

 public myprogressview(context context, attributeset attrs) {
  super(context, attrs);
  mcontext = context;
  // 获取自定义的属性
  initattrs(context, attrs);
  initvariable();
 }

 private void initattrs(context context, attributeset attrs) {
  typedarray typearray = context.gettheme().obtainstyledattributes(attrs,
    r.styleable.taskscompletedview, 0, 0);
  mradius = typearray.getdimension(r.styleable.taskscompletedview_radius, 80);
  mstrokewidth = typearray.getdimension(r.styleable.taskscompletedview_strokewidth, 10);
  mcirclecolor = typearray.getcolor(r.styleable.taskscompletedview_circlecolor, 0xffffffff);
  mringcolor = typearray.getcolor(r.styleable.taskscompletedview_ringcolor, 0xffffffff);

  mringradius = mradius + mstrokewidth / 2;
 }

 private void initvariable() {
  //画圆画笔设置
  mcirclepaint = new paint();
  mcirclepaint.setantialias(true);//防锯齿
  mcirclepaint.setcolor(mcirclecolor);
  mcirclepaint.setstyle(paint.style.fill);

  //“使用”字画笔设置
  musepaint = new paint();
  musepaint.setantialias(true);
  musepaint.setstyle(paint.style.fill);
  musepaint.setcolor(getresources().getcolor(r.color.ticket_color));
  musepaint.settextsize(screenutil.sp2px(mcontext, 10));

  //圆环画笔设置
  mringdefaultpaint = new paint();
  mringdefaultpaint.setantialias(true);
  mringdefaultpaint.setcolor(getresources().getcolor(r.color.default_ring_color));
  mringdefaultpaint.setstyle(paint.style.stroke);
  mringdefaultpaint.setstrokewidth(mstrokewidth);

  //已使用多少圆环画笔设置
  mringpaint = new paint();
  mringpaint.setantialias(true);
  mringpaint.setcolor(mringcolor);
  mringpaint.setstyle(paint.style.stroke);
  mringpaint.setstrokewidth(mstrokewidth);

  mtextpaint = new paint();
  mtextpaint.setantialias(true);
  mtextpaint.setstyle(paint.style.fill);
  mtextpaint.setcolor(color.black);
  mtextpaint.settextsize(screenutil.sp2px(mcontext, 22));

  mlinepaint = new paint();
  mlinepaint.setcolor(color.white);


  //获取字体高度
  fontmetrics fm = mtextpaint.getfontmetrics();
  mtxtheight = (int) math.ceil(fm.descent - fm.ascent);

 }

 @override
 protected void ondraw(canvas canvas) {

  mxcenter = getwidth() / 2;
  mycenter = getheight() / 2;

  //画圆
  canvas.drawcircle(mxcenter, mycenter, mradius, mcirclepaint);

  rectf oval = new rectf();
  oval.left = (mxcenter - mringradius);
  oval.top = (mycenter - mringradius);
  oval.right = mringradius * 2 + (mxcenter - mringradius);
  oval.bottom = mringradius * 2 + (mycenter - mringradius);
  //画整圆弧
  canvas.drawarc(oval, -90, 360, false, mringdefaultpaint);
  //已使用多少圆弧
  canvas.drawarc(oval, -90, ((float) mprogress / mtotalprogress) * 360, false, mringpaint);
  //文字绘制
  string txt = mprogress + "%";
  //文字的长度
  mtxtwidth = mtextpaint.measuretext(txt, 0, txt.length());
  canvas.drawtext(txt, mxcenter - mtxtwidth / 2, mycenter + mtxtheight / 9, mtextpaint);

  rect _pb = new rect();
  string sup = "已用";
  musepaint.gettextbounds(sup, 0, sup.length(), _pb);
  int perx = mxcenter - _pb.width() / 2;
  canvas.drawtext(sup, perx, mycenter / 2, musepaint);

  if (!textutils.isempty(usedflow)) {
   musepaint.gettextbounds(usedflow, 0, usedflow.length(), _pb);
   perx = mxcenter - _pb.width() / 2;
   canvas.drawtext(usedflow, perx, (float) (mycenter + mycenter / 1.7), musepaint);
  }

  //画横线图片
  bitmap bitmap = bitmapfactory.decoderesource(getresources(), r.mipmap.circle_bottom_bg);
  perx = mxcenter - bitmap.getwidth() / 2;
  canvas.drawbitmap(bitmap, perx, (float) (mycenter + mycenter / 5), mlinepaint);
 }

 /**
  * 设置当前进度
  * @param progress
  */
 public void setprogress(int progress) {
  mprogress = progress;
  postinvalidate();
 }

 /**
  * 实际展示总进度
  * @param progress
  */
 public void setmshowprogress(int progress) {
  mshowprogress = progress;
  new thread(new circlethread()).start();
 }

 public void setusedflow(string usedflow) {
  this.usedflow = usedflow;
 }


 private class circlethread implements runnable{

  int m=0;
  int i=0;

  @override
  public void run() {
   // todo auto-generated method stub
   while(!thread.currentthread().isinterrupted()){
    try {
     thread.sleep(50);
     m++;
     message msg = new message();
     msg.what = 1;
     if(i < mshowprogress){
      i += m;
     }else{
      i = mshowprogress;
      return;
     }
     msg.obj = i;
     circlehandler.sendmessage(msg);
    } catch (interruptedexception e) {
     // todo auto-generated catch block
     e.printstacktrace();
    }
   }
  }

 }
}

2.flowactivity.java

package com.czhappy.effectdemo.activity;

import android.os.bundle;
import android.support.annotation.nullable;
import android.support.v7.app.appcompatactivity;
import android.view.view;

import com.czhappy.effectdemo.r;
import com.czhappy.effectdemo.view.myprogressview;

/**
 * description:
 * user: chenzheng
 * date: 2017/1/21 0021
 * time: 17:17
 */
public class flowactivity extends appcompatactivity {

 private myprogressview mtasksview;

 @override
 protected void oncreate(@nullable bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_flow);

  initview();
 }

 private void initview() {
  mtasksview = (myprogressview) findviewbyid(r.id.flow_prgress_view);
 }

 public void beginanim(view view){
  mtasksview.setusedflow("200.0m");
  mtasksview.setmshowprogress(60);
 }
}

3.activity_flow.xml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tc="http://schemas.android.com/apk/res-auto"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:padding="10dp"
 android:background="#fff"
 android:gravity="center_horizontal"
 android:orientation="vertical">

 <button
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:onclick="beginanim"
  android:text="开始动画"/>

 <com.czhappy.effectdemo.view.myprogressview
  android:id="@+id/flow_prgress_view"
  android:layout_width="100dp"
  android:layout_height="100dp"
  tc:circlecolor="@color/circle_color"
  tc:radius="44dp"
  tc:ringcolor="@color/ring_color"
  tc:strokewidth="6dp"
  android:layout_margintop="10dp"/>

</linearlayout>

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