- 上截圖
- 代碼片段
package org.zhx.rounprogress; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.PathMeasure; import android.graphics.RectF; import android.graphics.Typeface; import android.util.AttributeSet; import android.util.Log; import android.view.View; /* * ----------------------------------------------------------------- * Copyright (C) 2018-2020, by vogtec, All rights reserved. * ----------------------------------------------------------------- * File: RoundProgress.java * Author: zhouxue * Version: 1.0 * Create: 2018/5/25 14:23 * Changes (from 2018/5/25) * ----------------------------------------------------------------- * 2018/5/25 : Create RoundProgress.java (zhouxue); * ----------------------------------------------------------------- */ public class RoundProgress extends View { private String TAG=RoundProgress.class.getSimpleName(); /** * 畫筆對象的引用 */ private Paint paint; /** * 圓環的顏色 */ private int roundColor; /** * 圓環進度的顏色 */ private int roundProgressColor; /** * 中間進度百分比的字符串的顏色 */ private int textColor; /** * 中間進度百分比的字符串的字體 */ private float textSize; /** * 圓環的寬度 */ private float roundWidth; /** * 最大進度 */ private int max; /** * 當前進度 */ private int progress; /** * 是否顯示中間的進度 */ private boolean textIsDisplayable; /** * 進度的風格，實心或者空心 */ private int style; public static final int STROKE = 0; public static final int FILL = 1; public RoundProgress(Context context) { this(context, null); } public RoundProgress(Context context, AttributeSet attrs) { this(context, attrs, 0); } public RoundProgress(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); paint = new Paint(); TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.RoundProgressBar); //獲取自定義屬性和默認值 （可以在xml 文件裏 進行配置） roundColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundColor, Color.RED); roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN); textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundtextColor, Color.GREEN); textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundtextSize, 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 onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); /** * 畫最外層的大圓環 */ int centre = getWidth()/2; //獲取圓心的x座標 float dotWidth=4+roundWidth;// 圓弧上小圓點的半徑 int radius = (int) (centre - roundWidth/2-dotWidth); //圓環的半徑 paint.setColor(roundColor); //設置圓環的顏色 paint.setStyle(Paint.Style.STROKE); //設置空心 paint.setStrokeWidth(roundWidth); //設置圓環的寬度 paint.setAntiAlias(true); //消除鋸齒 canvas.drawCircle(centre, centre, radius, paint); //畫出圓環 /** * 畫進度百分比 */ paint.setStrokeWidth(0); paint.setColor(textColor); paint.setTextSize(textSize); paint.setTypeface(Typeface.DEFAULT_BOLD); //設置字體 int percent = (int)(((float)progress / (float)max) * 100); //中間的進度百分比，先轉換成float在進行除法運算，不然都爲0 float textWidth = paint.measureText(percent + "%"); //測量字體寬度，我們需要根據字體的寬度設置在圓環中間 // Log.e("log", centre + "@@"+percent+"!!!"+(textIsDisplayable +"!"+(percent != 0) +(style == STROKE))); if(textIsDisplayable && percent != 0 && style == STROKE){ canvas.drawText(percent + "%", centre - textWidth / 2, centre + textSize/2, paint); //畫出進度百分比 } /** * 畫圓弧 ，畫圓環的進度 */ //設置進度是實心還是空心 paint.setStrokeWidth(roundWidth); //設置圓環的寬度 paint.setColor(roundProgressColor); //設置進度的顏色 RectF oval = new RectF(centre - radius, centre - radius, centre + radius, centre + radius); //用於定義的圓弧的形狀和大小的界限 switch (style) { case STROKE:{ paint.setStyle(Paint.Style.STROKE); canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根據進度畫圓弧 break; } case FILL:{ paint.setStyle(Paint.Style.FILL_AND_STROKE); if(progress !=0) canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根據進度畫圓弧 break; } } // 圓弧上的小圓點 if(progress<max) { paint.setStyle(Paint.Style.FILL); //計算當前進度 在圓弧上的位置 Path path = new Path(); path.addArc(oval, 0, 360 * progress / max); PathMeasure measure = new PathMeasure(path, false); float[] floats = new float[2]; measure.getPosTan(measure.getLength(), floats, null); //在當前進度末端 加上一個小圓點 // Log.e("!!!!!!!", floats[0] + "@@" + floats[1]); canvas.drawCircle(floats[0], floats[1], dotWidth, paint); } } public synchronized int getMax() { return max; } /** * 設置進度的最大值 * @param max */ public synchronized void setMax(int max) { if(max < 0){ throw new IllegalArgumentException("max not less than 0"); } this.max = max; } /** * 獲取進度.需要同步 * @return */ public synchronized int getProgress() { return progress; } /** * 設置進度，此爲線程安全控件，由於考慮多線的問題，需要同步 * 刷新界面調用postInvalidate()能在非UI線程刷新 * @param progress */ public synchronized void setProgress(int progress) { if(progress < 0){ progress=0; } if(progress > max){ progress = max; } if(progress <= max){ this.progress = progress; Log.e(TAG, progress + ""); postInvalidate(); } } 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; } }4、下載demo 地址 https://github.com/zhoulinxue/RounProgress.git
