Android中制作进度框和环形进度条的简单实例分享

进度框

import android.content.context; 
import android.graphics.canvas; 
import android.graphics.color; 
import android.graphics.paint; 
import android.util.attributeset; 
import android.view.view; 
 
import java.util.random; 


public class obliqueprogressbar extends view { 
 
  private paint mpaint; 
  private float mprogress; 
 
  public obliqueprogressbar(context context) { 
    this(context, null); 
  } 
 
  public obliqueprogressbar(context context, attributeset attrs) { 
    this(context, attrs, 0); 
  } 
 
  public obliqueprogressbar(context context, attributeset attrs, int defstyleattr) { 
    super(context, attrs, defstyleattr); 
 
    mpaint = new paint(); 
    mpaint.setantialias(true); 
  } 
 
 
  @override 
  protected void ondraw(canvas canvas) { 
    super.ondraw(canvas); 
 
    if (mprogress == 0) return; 
 
    //碎片雨 
    mpaint.setcolor(color.parsecolor("#a96ecb")); 
    mpaint.setstrokewidth(3); 
    random random = new random(); 
    int sx, sy; 
    for (int i = 0; i < 200; i++) { 
      sx = random.nextint(getwidth() + 10); 
      sy = random.nextint(getheight() + 10); 
//      canvas.drawline(sx, sy, sx+random.nextint(5), sy+random.nextint(5), mpaint); 
      canvas.drawcircle(sx, sy, random.nextint(5) + 1, mpaint); 
    } 
 
    //进度 
    mpaint.setcolor(color.parsecolor("#6affffff")); 
    mpaint.setstrokewidth(15); 
    float x = mprogress * getwidth(); 
    for (int i = 0; i < x; i += 30) { 
      canvas.drawline(i - 30, -10, i + 30, getheight() + 10, mpaint); 
    } 
 
  } 
 
  public void setprogress(float progress) { 
    this.mprogress = progress; 
    invalidate(); 
  } 
} 

环形进度条

先来看一下效果：

下面直接上代码了：

ckage com.stone.circleprogressbar.view; 
 
import android.content.context; 
import android.content.res.typedarray; 
import android.graphics.bitmap; 
import android.graphics.canvas; 
import android.graphics.color; 
import android.graphics.lineargradient; 
import android.graphics.paint; 
import android.graphics.rectf; 
import android.graphics.shader; 
import android.util.attributeset; 
import android.view.view; 
 
import com.stone.circleprogressbar.r; 

public class circleprogressbar extends view { 
 
 private float mprogress; 
 private int mbarcolor; 
 private int mtextcolor; 
 private float mtextsize; 
 
 public circleprogressbar(context context) { 
  this(context, null); 
 } 
 
 public circleprogressbar(context context, attributeset attrs) { 
  this(context, attrs, 0); 
 } 
 
 public circleprogressbar(context context, attributeset attrs, int defstyleattr) { 
  super(context, attrs, defstyleattr); 
 
  typedarray array = context.obtainstyledattributes(attrs, r.styleable.circleprogressbar); 
  mbarcolor = array.getcolor(r.styleable.circleprogressbar_barcolor, color.gray); 
  mtextcolor = array.getcolor(r.styleable.circleprogressbar_textcolor, color.gray); 
  mprogress = array.getfloat(r.styleable.circleprogressbar_progress, 0); 
 } 
 
 @override 
 protected void onmeasure(int widthmeasurespec, int heightmeasurespec) { 
  super.onmeasure(widthmeasurespec, heightmeasurespec); 
 } 
 
 public void setprogress(float count) { 
  mprogress = count; 
  invalidate(); 
 } 
 
 @override 
 protected void ondraw(canvas canvas) { 
  int w = getwidth(); 
  int h = getheight(); 
  int strokewidth = 20; 
  int radius = w / 2 - strokewidth / 2;//大圆 半径 
  bitmap barbitmap = bitmap.createbitmap(w, h, bitmap.config.argb_8888); 
  paint paint = new paint(); 
  paint.setantialias(true); //抗锯齿 
  paint.setstrokewidth(strokewidth); //描边宽 
  paint.setdither(true); //防抖动 
 
  /* 外边框 */ 
  canvas circlecanvas = new canvas(barbitmap); 
  rectf rect = new rectf(0, 0, w, h); 
  paint.setcolor(color.argb(0x11, 0xcc, 0xcc, 0xcc)); 
//  circlecanvas.drawrect(rect, paint); //没啥用 只是看外边框的 
 
  /* 内圆 */ 
  paint.setcolor(color.cyan); 
  paint.setshader(new lineargradient(0, 0, w, h, color.red, color.green, shader.tilemode.clamp)); 
  circlecanvas.drawcircle(w / 2, h / 2, radius - strokewidth / 2, paint); 
  paint.setshader(null); 
 
  /* 外圆 */ 
  paint.setcolor(mbarcolor); 
  paint.setstyle(paint.style.stroke); 
  circlecanvas.drawcircle(w / 2, h / 2, radius, paint); 
 
  /* 圆弧 */ 
  paint.setshader(new lineargradient(0, 0, w, h, 
    new int[]{color.green, color.magenta, color.cyan, color.red}, 
    new float[]{0.2f, 0.5f, 0.7f, 1.0f}, shader.tilemode.clamp)); 
  float cur = mprogress * 360 * 0.01f; 
  circlecanvas.drawarc(new rectf(strokewidth / 2, strokewidth / 2, w - strokewidth / 2, h - strokewidth / 2), 
    360 - 45, cur, false, paint); 
  paint.setshader(null); 
 
  /* 文本 */ 
  paint.setcolor(mtextcolor); 
  if (mtextsize == 0) { 
   calctextsize(paint, w, strokewidth); 
  } else { 
   paint.settextsize(mtextsize); 
  } 
  paint.settextalign(paint.align.left);//default 
  string percent = mprogress + "%"; 
  paint.setstyle(paint.style.fill); 
  circlecanvas.drawtext(percent, w / 2 - paint.measuretext(percent) / 2, h / 2 + paint.gettextsize() / 2, paint); 
 
  canvas.drawbitmap(barbitmap, 0, 0, paint); 
 } 
 
 /** 
  * 计算并设置最适合的textsize 
  * 
  * @param paint 
  * @param max 最大宽度 
  * @param offset 偏移 
  */ 
 private void calctextsize(paint paint, int max, int offset) { 
  float width = paint.measuretext("99.99%"); 
  while (width < max * 3 / 5) { 
   paint.settextsize(paint.gettextsize() + 5); 
   width = paint.measuretext("92.88%") + offset / 2; 
  } 
  mtextsize = paint.gettextsize(); 
 } 
 
} 

设置进度刷新显示  调用  setprogress()即可。