自定义圆形ProgressBar
16lz
2021-01-26
本文主要参考博客:https://www.cnblogs.com/tianzhijiexian/p/3854346.html
在移植原来项目时候有几个坑,需要注意下,否则编译不过:
1. androidManifest.xml里面需要使用:
android:theme="@style/AppTheme"
这个属性在style.xml里面有设定。
2. 在使用的时候需要使用自定义的属性,因此需要修改为:
xmlns:android_custom="http://schemas.android.com/apk/res-auto"
否则自定义的属性无法导入进来,无法在xml中声名使用
3. 记得将使用包名替换成自己工程里面的:
当然,这些地方我已经修改过了,具体可以参考git https://github.com/buder-cp/base_component_learn/tree/master/progressbar
progressBar的代码,修复了在使用FILE属性时,圆心的位置不固定的bug,主要是将画笔修改成了
paint.setStyle(Paint.Style.FILL);,这样中心点就固定了。package com.example.progressbar;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.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;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();}@Overrideprotected 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(false); //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0float 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/** * 可以绘制不同效果的圆弧 */RectF oval = new RectF(centre - radius + roundWidth/2, centre - radius+ roundWidth/2, centre+ radius- roundWidth/2, centre + radius- roundWidth/2); //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);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();}}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;}}
在xml中的使用:
具体效果如下:
完整代码请看:
https://github.com/buder-cp/base_component_learn/tree/master/progressbar
原参考博客:导入时请参考上面说的几点坑
https://www.cnblogs.com/tianzhijiexian/p/3854346.html
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