Java - Android(安卓)自定义控件之圆形进度条
16lz
2021-01-26
Author: YugeCse
Date: 2014.06.12
package com.kaiju.kaiju.usercontrols;import android.annotation.SuppressLint;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Paint.Align;import android.graphics.Paint.FontMetrics;import android.graphics.RectF;import android.util.AttributeSet;import android.view.View;public class CircleProgressBar extends View { private Context context; private Paint paint; private float radius = 40f; private float ringRadius = 10f; private int progress = 0; private int max = 100; private int circleColor = Color.GRAY; private int progressColor = Color.parseColor("#feb239"); public CircleProgressBar(Context context){ super(context); init(); } public CircleProgressBar(Context context, AttributeSet attrs) { super(context, attrs); init(); } public void init(){ paint = new Paint(); paint.setAntiAlias(true); } //设置默认圆环颜色 public void setCircleColor(int color){ this.circleColor = color; this.invalidate(); } public int getCircleColor(){ return this.circleColor; } //设置进度条颜色 public void setProgressColor(int color){ this.progressColor = color; this.invalidate(); } public int getProgressColor(){ return this.progressColor; } //设置圆环半径 public void setRingRadius(float radius){ this.ringRadius = radius; this.invalidate(); } public float getRingRadius(){ return this.ringRadius; } public void setRadius(float radius){ this.radius = radius; this.invalidate(); } public float getRadius(){ return this.radius; } //设置最大值 public void setMax(int value){ this.max = value; } public int getMax(){ return this.max; } //设置当前进度值 public void setProgress(int progress){ this.progress = progress; this.invalidate(); } public int getProgress(){ return this.progress; } @SuppressLint("DrawAllocation") @Override protected void onDraw(Canvas canvas) { //获取控件测量的宽度高度 int width = getMeasuredWidth(); int height = getMeasuredHeight(); super.onDraw(canvas); //设置画笔参数 paint.setAntiAlias(true); paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(10f); paint.setColor(circleColor); //绘制最大圆 canvas.drawArc(new RectF((width-radius*2)/2+2,(height-radius*2)/2,radius*2,radius*2), 270, 360, false, paint); paint.setColor(progressColor); //绘制内圆 canvas.drawArc(new RectF((width-radius*2)/2+2,(height-radius*2)/2,radius*2,radius*2), 270, (float)progress/max*360, false, paint); paint.setColor(Color.BLUE); String value = (int)(((float)progress/max)*100)+"%"; float widthText = 0f; float[] widths = new float[value.length()]; for(int i=0;i掌握这方面的自定义控件，主要的就是掌握Canvas的绘图函数，已经如何通过使用变量来控制绘图。这种进度条的绘制应该也算是最基本的了吧，哈哈。
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