android自定义view制作圆形进度条效果

还是我们自定view的那几个步骤：
1、自定义view的属性
2、在view的构造方法中获得我们自定义的属性
[ 3、重写onmesure ]
4、重写ondraw

1、自定义属性：

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
 <declare-styleable name="customtitleview"> 
  <attr name="mspeed" format="integer" /> 
  <attr name="mfirstcolor" format="color" /> 
  <attr name="msecondcolor" format="color" /> 
  <attr name="mcirclewidth" format="dimension"/> 
  <attr name="textsize" format="dimension"/> 
 </declare-styleable> 
</resources> 

2、在view的构造方法中获得我们自定义的属性

/** 
 * 当前进度 
 */ 
 private int mprogress; 
 /** 
 * 第一圈的颜色 
 */ 
 private int mfirstcolor; 
 /** 
 * 第二圈的颜色 
 */ 
 private int msecondcolor; 
 /** 
 * 圈的宽度 
 */ 
 private int mcirclewidth; 
 /** 
 * 速度 
 */ 
 private int mspeed; 
 /** 
 * 中间进度百分比的字符串的字体 
 */ 
 private float textsize; 
 private boolean isnext = false; 
 private paint mpaint; 
 
 public customtitleview(context context, attributeset attrs) { 
  super(context, attrs); 
  typedarray typearray = context.obtainstyledattributes(attrs, r.styleable.customtitleview); 
  int count= typearray.getindexcount(); 
  for(int i=0;i<count;i++){ 
   int attr =typearray.getindex(i); 
   switch(attr){ 
    case r.styleable.customtitleview_mfirstcolor: 
     mfirstcolor=typearray.getcolor(attr,color.black); 
     break; 
    case r.styleable.customtitleview_msecondcolor: 
     msecondcolor=typearray.getcolor(attr,color.red); 
     break; 
    case r.styleable.customtitleview_mcirclewidth: 
     mcirclewidth = typearray.getdimensionpixelsize(attr,(int)typedvalue.applydimension( 
       typedvalue.complex_unit_px,20,getresources().getdisplaymetrics())); 
     break; 
 
    case r.styleable.customtitleview_textsize: 
     textsize = typearray.getdimensionpixelsize(attr,(int)typedvalue.applydimension( 
       typedvalue.complex_unit_px,30,getresources().getdisplaymetrics())); 
     break; 
    case r.styleable.customtitleview_mspeed: 
     mspeed = typearray.getint(attr,100);// 默认100 
     break; 
   } 
  } 
  log.v("----",mspeed+""); 
  typearray.recycle(); 
  mpaint = new paint(); 
  new thread() 
  { 
   public void run() 
   { 
    while (true) 
    { 
     mprogress++; 
     if (mprogress == 360) 
     { 
      mprogress = 0; 
      if (!isnext) 
       isnext = true; 
      else 
       isnext = false; 
     } 
     postinvalidate(); 
     try 
     { 
      thread.sleep(mspeed); 
     } catch (interruptedexception e) 
     { 
      e.printstacktrace(); 
     } 
    } 
   }; 
  }.start(); 
 } 

3、直接重写ondraw，这不需要重写onmeasure

protected void onmeasure(int widthmeasurespec, int heightmeasurespec){ 
    super.onmeasure(widthmeasurespec, heightmeasurespec); 
 } 
 protected void ondraw(canvas canvas) 
 { 
  /** 
  * 画进度百分比 
  */ 
  mpaint.setstrokewidth(0); 
  mpaint.setcolor(color.black); 
  mpaint.settextsize(textsize); 
  mpaint.settypeface(typeface.default_bold); //设置字体 
  int percent = (int)(((float)mprogress / (float)360) * 100); 
  int centre = getwidth() / 2; // 获取圆心的x坐标 
  int radius = centre - mcirclewidth / 2;// 半径 
  float textwidth = mpaint.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 
  canvas.drawtext(percent + "%",centre-textwidth/ 2,centre+textsize/2, mpaint); //画出进度百分比 
  mpaint.setstrokewidth(mcirclewidth); // 设置圆环的宽度 
  mpaint.setantialias(true); // 消除锯齿 
  mpaint.setstyle(paint.style.stroke); // 设置空心 
  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 
  if(isnext){ 
   mpaint.setcolor(msecondcolor); // 设置圆环的颜色 
   canvas.drawcircle(centre, centre, radius, mpaint); // 画出圆环 
   mpaint.setcolor(mfirstcolor); // 设置圆环的颜色 
   canvas.drawarc(oval, -90, mprogress, false, mpaint); // 根据进度画圆弧 
  }else{ 
   mpaint.setcolor(mfirstcolor); // 设置圆环的颜色 
   canvas.drawcircle(centre, centre, radius, mpaint); // 画出圆环 
   mpaint.setcolor(msecondcolor); // 设置圆环的颜色 
   canvas.drawarc(oval, -90, mprogress, false, mpaint); // 根据进度画圆弧 
  } 
 } 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" 
 xmlns:custom="http://schemas.android.com/apk/res-auto" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" 
 android:padding="20dp" 
 > 
 <view.customtitleview 
  android:layout_width="200dp" 
  android:layout_height="400dp" 
  custom:mspeed="50" 
  custom:mfirstcolor="#7300e6" 
  custom:msecondcolor="#39ac39" 
  custom:mcirclewidth="10px" 
  custom:textsize="20px" 
  android:id="@+id/one" 
 /> 
 <view.customtitleview 
  android:layout_toendof="@id/one" 
  android:layout_width="200dp" 
  android:layout_height="400dp" 
  custom:mspeed="100" 
  custom:mfirstcolor="#0040ff" 
  custom:msecondcolor="#40ff00" 
  custom:mcirclewidth="20px" 
  custom:textsize="30px" 
  /> 
</relativelayout> 

效果预览

源码下载：http://xiazai.jb51.net/201701/yuanma/androidprogressbar(jb51.net).rar

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。