自定义Android圆形进度条(附源码)

本文实例讲述了android自定义圆形进度条，分享给大家供大家参考。具体如下：
运行效果截图如下：

具体代码如下：

自定义的view:

import com.example.circlepregress.r;

import android.content.context;
import android.content.res.typedarray;
import android.graphics.canvas;
import android.graphics.color;
import android.graphics.paint;
import android.graphics.rectf;
import android.graphics.typeface;
import android.util.attributeset;
import android.util.log;
import android.view.view;

public class roundprogressbar extends view {

 // 画笔对象的引用
 private paint paint;

 // 圆环的颜色
 private int roundcolor;

 // 圆环进度的颜色
 private int roundprogresscolor;

 // 中间进度百分比的字符串的颜色
 private int textcolor;

 // 中间进度百分比的字符串的字体
 private float textsize;

 // 圆环的宽度
 private float roundwidth;

 // 最大进度
 private int max;

 // 当前进度
 private int progress;

 // 是否显示中间的进度
 private boolean textisdisplayable;

 // 进度的风格，实心或者空心
 private int style;

 public static final int stroke = 0;
 public static final int fill = 1;

 /**
 * 构造方法
 */
 public roundprogressbar(context context) {
 this(context, null);
 }

 public roundprogressbar(context context, attributeset attrs) {
 this(context, attrs, 0);
 }

 public roundprogressbar(context context, attributeset attrs, int defstyle) {
 super(context, attrs, defstyle);

 paint = new paint();

 typedarray mtypedarray = context.obtainstyledattributes(attrs,
  r.styleable.roundprogressbar);

 // 获取自定义属性和默认值
 roundcolor = mtypedarray.getcolor(
  r.styleable.roundprogressbar_roundcolor, color.red);
 roundprogresscolor = mtypedarray.getcolor(
  r.styleable.roundprogressbar_roundprogresscolor, color.green);
 textcolor = mtypedarray.getcolor(
  r.styleable.roundprogressbar_textcolor, color.green);
 textsize = mtypedarray.getdimension(
  r.styleable.roundprogressbar_textsize, 15);
 roundwidth = mtypedarray.getdimension(
  r.styleable.roundprogressbar_roundwidth, 5);
 max = mtypedarray.getinteger(r.styleable.roundprogressbar_max, 100);
 textisdisplayable = mtypedarray.getboolean(
  r.styleable.roundprogressbar_textisdisplayable, true);
 style = mtypedarray.getint(r.styleable.roundprogressbar_style, 0);

 mtypedarray.recycle();
 }

 @override
 protected void ondraw(canvas canvas) {
 super.ondraw(canvas);

 // 画最外层的大圆环
 int centre = getwidth() / 2; // 获取圆心的x坐标
 int radius = (int) (centre - roundwidth / 2); // 圆环的半径
 paint.setcolor(roundcolor); // 设置圆环的颜色
 paint.setstyle(paint.style.stroke); // 设置空心
 paint.setstrokewidth(roundwidth); // 设置圆环的宽度
 paint.setantialias(true); // 消除锯齿
 canvas.drawcircle(centre, centre, radius, paint); // 画出圆环

 log.e("log", centre + "");

 /**
  * 画进度百分比
  */
 paint.setstrokewidth(0);
 paint.setcolor(textcolor);
 paint.settextsize(textsize);
 paint.settypeface(typeface.default_bold); // 设置字体
 int percent = (int) (((float) progress / (float) max) * 100); // 中间的进度百分比，先转换成float在进行除法运算，不然都为0
 float textwidth = paint.measuretext(percent + "%"); // 测量字体宽度，我们需要根据字体的宽度设置在圆环中间

 if (textisdisplayable && percent != 0 && style == stroke) {
  canvas.drawtext(percent + "%", centre - textwidth / 2, centre
   + textsize / 2, paint); // 画出进度百分比
 }

 /**
  * 画圆弧 ，画圆环的进度
  */

 // 设置进度是实心还是空心
 paint.setstrokewidth(roundwidth); // 设置圆环的宽度
 paint.setcolor(roundprogresscolor); // 设置进度的颜色
 rectf oval = new rectf(centre - radius, centre - radius, centre
  + radius, centre + radius); // 用于定义的圆弧的形状和大小的界限

 switch (style) {
 case stroke: {
  paint.setstyle(paint.style.stroke);
  canvas.drawarc(oval, 0, 360 * progress / max, false, paint); // 根据进度画圆弧
  break;
 }
 case fill: {
  paint.setstyle(paint.style.fill_and_stroke);
  if (progress != 0)
  canvas.drawarc(oval, 0, 360 * progress / max, true, paint); // 根据进度画圆弧
  break;
 }
 }

 }

 public synchronized int getmax() {
 return max;
 }

 /**
 * 设置进度的最大值
 * 
 * @param max
 */
 public synchronized void setmax(int max) {
 if (max < 0) {
  throw new illegalargumentexception("max not less than 0");
 }
 this.max = max;
 }

 /**
 * 获取进度.需要同步
 * 
 * @return
 */
 public synchronized int getprogress() {
 return progress;
 }

 /**
 * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步 刷新界面调用postinvalidate()能在非ui线程刷新
 * 
 * @param progress
 */
 public synchronized void setprogress(int progress) {
 if (progress < 0) {
  throw new illegalargumentexception("progress not less than 0");
 }
 if (progress > max) {
  progress = max;
 }
 if (progress <= max) {
  this.progress = progress;
  postinvalidate();
 }

 }

 /******************** 下边是属性的get、set方法 ***************/
 public int getcriclecolor() {
 return roundcolor;
 }

 public void setcriclecolor(int criclecolor) {
 this.roundcolor = criclecolor;
 }

 public int getcricleprogresscolor() {
 return roundprogresscolor;
 }

 public void setcricleprogresscolor(int cricleprogresscolor) {
 this.roundprogresscolor = cricleprogresscolor;
 }

 public int gettextcolor() {
 return textcolor;
 }

 public void settextcolor(int textcolor) {
 this.textcolor = textcolor;
 }

 public float gettextsize() {
 return textsize;
 }

 public void settextsize(float textsize) {
 this.textsize = textsize;
 }

 public float getroundwidth() {
 return roundwidth;
 }

 public void setroundwidth(float roundwidth) {
 this.roundwidth = roundwidth;
 }

} 

所需要的资源文件：attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

 <declare-styleable name="roundprogressbar">
 <attr name="roundcolor" format="color" />
 <attr name="roundprogresscolor" format="color" />
 <attr name="roundwidth" format="dimension"></attr>
 <attr name="textcolor" format="color" />
 <attr name="textsize" format="dimension" />
 <attr name="max" format="integer"></attr>
 <attr name="textisdisplayable" format="boolean"></attr>
 <attr name="style">
  <enum name="stroke" value="0"></enum>
  <enum name="fill" value="1"></enum>
 </attr>
 </declare-styleable>

</resources>

布局文件如下：

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:android_custom="http://schemas.android.com/apk/res/com.example.circlepregress"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent" >

 <com.example.roundprogressbar.roundprogressbar
 android:id="@+id/roundprogressbar2"
 android:layout_width="80dip"
 android:layout_height="80dip"
 android:layout_alignleft="@+id/roundprogressbar1"
 android:layout_alignparentbottom="true"
 android:layout_marginbottom="78dp"
 android_custom:roundcolor="#d1d1d1"
 android_custom:roundprogresscolor="@android:color/black"
 android_custom:roundwidth="10dip"
 android_custom:textcolor="#9a32cd"
 android_custom:textsize="18sp" />

 <com.example.roundprogressbar.roundprogressbar
 android:id="@+id/roundprogressbar4"
 android_custom:style="fill"
 android:layout_width="80dip"
 android:layout_height="80dip"
 android:layout_alignparentright="true"
 android:layout_aligntop="@+id/roundprogressbar1"
 android:layout_marginright="32dp"
 android_custom:roundprogresscolor="#c2c2c2"
 android_custom:roundwidth="1dip" />

 <com.example.roundprogressbar.roundprogressbar
 android:id="@+id/roundprogressbar3"
 android:layout_width="80dip"
 android:layout_height="80dip"
 android:layout_alignleft="@+id/roundprogressbar4"
 android:layout_aligntop="@+id/roundprogressbar2"
 android_custom:roundcolor="#c6e2ff"
 android_custom:roundprogresscolor="#cd3333"
 android_custom:roundwidth="10dip"
 android_custom:textisdisplayable="false" />

 <com.example.roundprogressbar.roundprogressbar
 android:id="@+id/roundprogressbar5"
 android:layout_width="50dip"
 android:layout_height="50dip"
 android:layout_below="@+id/roundprogressbar1"
 android:layout_marginleft="22dp"
 android:layout_torightof="@+id/roundprogressbar1" />

 <button
 android:id="@+id/button1"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignparentleft="true"
 android:layout_alignparentright="true"
 android:layout_alignparenttop="true"
 android:text="button" />

 <com.example.roundprogressbar.roundprogressbar
 android:id="@+id/roundprogressbar1"
 android:layout_width="80dip"
 android:layout_height="80dip"
 android:layout_alignparentleft="true"
 android:layout_below="@+id/button1"
 android:layout_marginleft="16dp"
 android:layout_margintop="40dp" />

</relativelayout>

其中我们使用了这一句：

xmlns:android_custom=http://schemas.android.com/apk/res/com.example.circlepregress

xmlns:android_custom是我们自己定义的标签，res/com.example.circlepregress其中res/后边的就是我们自定义view所在的目录

mainactivity.java如下：

import android.app.activity;
import android.os.bundle;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.button;

import com.example.circlepregress.r;

public class mainactivity extends activity {
 private roundprogressbar mroundprogressbar1, mroundprogressbar2 ,mroundprogressbar3, mroundprogressbar4, mroundprogressbar5;
 private int progress = 0;

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

 mroundprogressbar1 = (roundprogressbar) findviewbyid(r.id.roundprogressbar1);
 mroundprogressbar2 = (roundprogressbar) findviewbyid(r.id.roundprogressbar2);
 mroundprogressbar3 = (roundprogressbar) findviewbyid(r.id.roundprogressbar3);
 mroundprogressbar4 = (roundprogressbar) findviewbyid(r.id.roundprogressbar4);
 mroundprogressbar5 = (roundprogressbar) findviewbyid(r.id.roundprogressbar5);

 ((button)findviewbyid(r.id.button1)).setonclicklistener(new onclicklistener() {

  @override
  public void onclick(view v) {
  new thread(new runnable() {

   @override
   public void run() {
   while(progress <= 100){
    progress += 3;

    system.out.println(progress);

    mroundprogressbar1.setprogress(progress);
    mroundprogressbar2.setprogress(progress);
    mroundprogressbar3.setprogress(progress);
    mroundprogressbar4.setprogress(progress);
    mroundprogressbar5.setprogress(progress);

    try {
    thread.sleep(100);
    } catch (interruptedexception e) {
    e.printstacktrace();
    }
   }

   }
  }).start();
  }
 });

 }


}

项目免费下载： 《android自定义圆形进度条》

希望本文所述对大家学习android软件编程有所帮助。