目录
- 一、普通效果。
- 二、单环在圈外画弧度
- 三、双环效果
- 四、Xml布局
- 五、MainActivity中代码的引用
- 六、自定义属性
一、普通效果。
本章博客有4种不同的效果,小伙伴可以绘制更多的效果,唯一不同的代码,是自定义view时,怎么绘制弧度。Main类和布局无更改”
package tester.ermu.com.pingamedemo;
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.util.Log;
import android.view.View;
/**
* 仿iphone带进度的进度条,线程安全的View,可直接在线程中更新进度
* @author xiaanming
*
*/
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);//圆环的颜色
roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);//圆环进度的颜色
textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);//字体颜色
textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15);//字体大小
roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);//圆环的宽度
max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);//进度条最大值,一般都为1001
textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);//是否显示中间的进度
style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 1);//进度的风格,实心或者空心
mTypedArray.recycle();
}
/**
* 设置进度,并判断进度状态
* 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();
}
}
@Override
protected 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
Log.i("Text","centre ------1111"+centre);
int radius = (int) (centre - roundWidth*2); //圆环的半径
Log.i("Text","radius ------2222"+radius);
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(true); //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0
float 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);//----1号:代码用于定义的圆弧的形状和大小的界限
// RectF oval = new RectF(centre - radius-40, centre - radius-40, centre+ radius+40, centre + radius+40); //--2号:用于定义的圆弧的形状和大小的界限
// RectF ova12 = new RectF(centre - radius-60, centre - radius-60, centre+ radius+60, centre + radius+60);
// RectF oval = new RectF(centre - radius+40, centre - radius+40, centre+ radius-40, centre + radius-40); //--2号:用于定义的圆弧的形状和大小的界限
// RectF ova12 = new RectF(centre - radius+60, centre - radius+60, centre+ radius-60, centre + radius-60);
switch (style) {
/*
* public void drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, Paint paint)
oval :指定圆弧的外轮廓矩形区域。
startAngle: 圆弧起始角度,单位为度。
sweepAngle: 圆弧扫过的角度,顺时针方向,单位为度。
useCenter: 如果为True时,在绘制圆弧时将圆心包括在内,通常用来绘制扇形。
paint: 绘制圆弧的画板属性,如颜色,是否填充等。
*
* */
case STROKE:{
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(18);
paint.setColor(Color.RED);
canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根据进度画圆弧
/*最外围黄色圆弧*/
// paint.setStrokeWidth(9);
// paint.setColor(Color.YELLOW);
// canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //根据进度画圆弧
break;
}
case FILL:{
paint.setStyle(Paint.Style.FILL_AND_STROKE);
paint.setStrokeWidth(18);
paint.setColor(Color.RED);
if(progress !=0)
/*最外围红色圆弧*/
canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根据进度画圆弧
/*最外围黄色圆弧*/
// paint.setStrokeWidth(9);
// paint.setColor(Color.YELLOW);
// canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //
break;
}
}
}
}
二、单环在圈外画弧度
和普通效果代码不同的地方如下,屏蔽167行,打开168行即可:
package tester.ermu.com.pingamedemo;
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.util.Log;
import android.view.View;
/**
* 仿iphone带进度的进度条,线程安全的View,可直接在线程中更新进度
* @author xiaanming
*
*/
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);//圆环的颜色
roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);//圆环进度的颜色
textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);//字体颜色
textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15);//字体大小
roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);//圆环的宽度
max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);//进度条最大值,一般都为1001
textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);//是否显示中间的进度
style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 1);//进度的风格,实心或者空心
mTypedArray.recycle();
}
/**
* 设置进度,并判断进度状态
* 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();
}
}
@Override
protected 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
Log.i("Text","centre ------1111"+centre);
int radius = (int) (centre - roundWidth*2); //圆环的半径
Log.i("Text","radius ------2222"+radius);
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(true); //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0
float 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);//----1号:代码用于定义的圆弧的形状和大小的界限
RectF oval = new RectF(centre - radius-40, centre - radius-40, centre+ radius+40, centre + radius+40); //--2号:用于定义的圆弧的形状和大小的界限
// RectF ova12 = new RectF(centre - radius-60, centre - radius-60, centre+ radius+60, centre + radius+60);
// RectF oval = new RectF(centre - radius+40, centre - radius+40, centre+ radius-40, centre + radius-40); //--2号:用于定义的圆弧的形状和大小的界限
// RectF ova12 = new RectF(centre - radius+60, centre - radius+60, centre+ radius-60, centre + radius-60);
switch (style) {
/*
* public void drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, Paint paint)
oval :指定圆弧的外轮廓矩形区域。
startAngle: 圆弧起始角度,单位为度。
sweepAngle: 圆弧扫过的角度,顺时针方向,单位为度。
useCenter: 如果为True时,在绘制圆弧时将圆心包括在内,通常用来绘制扇形。
paint: 绘制圆弧的画板属性,如颜色,是否填充等。
*
* */
case STROKE:{
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(18);
paint.setColor(Color.RED);
canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根据进度画圆弧
/*最外围黄色圆弧*/
// paint.setStrokeWidth(9);
// paint.setColor(Color.YELLOW);
// canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //根据进度画圆弧
break;
}
case FILL:{
paint.setStyle(Paint.Style.FILL_AND_STROKE);
paint.setStrokeWidth(18);
paint.setColor(Color.RED);
if(progress !=0)
/*最外围红色圆弧*/
canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根据进度画圆弧
/*最外围黄色圆弧*/
// paint.setStrokeWidth(9);
// paint.setColor(Color.YELLOW);
// canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //
break;
}
}
}
}
三、双环效果
代码不同的地方
package tester.ermu.com.pingamedemo;
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.util.Log;
import android.view.View;
/**
* 仿iphone带进度的进度条,线程安全的View,可直接在线程中更新进度
* @author xiaanming
*
*/
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);//圆环的颜色
roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);//圆环进度的颜色
textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);//字体颜色
textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15);//字体大小
roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);//圆环的宽度
max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);//进度条最大值,一般都为1001
textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);//是否显示中间的进度
style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 1);//进度的风格,实心或者空心
mTypedArray.recycle();
}
/**
* 设置进度,并判断进度状态
* 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();
}
}
@Override
protected 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
Log.i("Text","centre ------1111"+centre);
int radius = (int) (centre - roundWidth*2); //圆环的半径
Log.i("Text","radius ------2222"+radius);
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(true); //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0
float 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);//----1号:代码用于定义的圆弧的形状和大小的界限
RectF oval = new RectF(centre - radius-40, centre - radius-40, centre+ radius+40, centre + radius+40); //--2号:用于定义的圆弧的形状和大小的界限
RectF ova12 = new RectF(centre - radius-60, centre - radius-60, centre+ radius+60, centre + radius+60);
// RectF oval = new RectF(centre - radius+40, centre - radius+40, centre+ radius-40, centre + radius-40); //--2号:用于定义的圆弧的形状和大小的界限
// RectF ova12 = new RectF(centre - radius+60, centre - radius+60, centre+ radius-60, centre + radius-60);
switch (style) {
/*
* public void drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, Paint paint)
oval :指定圆弧的外轮廓矩形区域。
startAngle: 圆弧起始角度,单位为度。
sweepAngle: 圆弧扫过的角度,顺时针方向,单位为度。
useCenter: 如果为True时,在绘制圆弧时将圆心包括在内,通常用来绘制扇形。
paint: 绘制圆弧的画板属性,如颜色,是否填充等。
*
* */
case STROKE:{
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(18);
paint.setColor(Color.RED);
canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根据进度画圆弧
/*最外围黄色圆弧*/
paint.setStrokeWidth(9);
paint.setColor(Color.YELLOW);
canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //根据进度画圆弧
break;
}
case FILL:{
paint.setStyle(Paint.Style.FILL_AND_STROKE);
paint.setStrokeWidth(18);
paint.setColor(Color.RED);
if(progress !=0)
/*最外围红色圆弧*/
canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根据进度画圆弧
/*最外围黄色圆弧*/
paint.setStrokeWidth(9);
paint.setColor(Color.YELLOW);
canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //
break;
}
}
}
}
实心效果环形进度条
这里需要添加或修改的代码如下:
package tester.ermu.com.pingamedemo;
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.util.Log;
import android.view.View;
/**
* 仿iphone带进度的进度条,线程安全的View,可直接在线程中更新进度
* @author xiaanming
*
*/
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);//圆环的颜色
roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);//圆环进度的颜色
textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);//字体颜色
textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15);//字体大小
roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);//圆环的宽度
max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);//进度条最大值,一般都为1001
textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);//是否显示中间的进度
style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 1);//进度的风格,实心或者空心
mTypedArray.recycle();
}
/**
* 设置进度,并判断进度状态
* 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();
}
}
@Override
protected 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
Log.i("Text","centre ------1111"+centre);
int radius = (int) (centre - roundWidth*2); //圆环的半径
Log.i("Text","radius ------2222"+radius);
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(true); //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0
float 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);//----1号:代码用于定义的圆弧的形状和大小的界限
// RectF oval = new RectF(centre - radius-40, centre - radius-40, centre+ radius+40, centre + radius+40); //--2号:用于定义的圆弧的形状和大小的界限
// RectF ova12 = new RectF(centre - radius-60, centre - radius-60, centre+ radius+60, centre + radius+60);
RectF oval = new RectF(centre - radius+40, centre - radius+40, centre+ radius-40, centre + radius-40); //--2号:用于定义的圆弧的形状和大小的界限
RectF ova12 = new RectF(centre - radius+60, centre - radius+60, centre+ radius-60, centre + radius-60);
switch (style) {
/*
* public void drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, Paint paint)
oval :指定圆弧的外轮廓矩形区域。
startAngle: 圆弧起始角度,单位为度。
sweepAngle: 圆弧扫过的角度,顺时针方向,单位为度。
useCenter: 如果为True时,在绘制圆弧时将圆心包括在内,通常用来绘制扇形。
paint: 绘制圆弧的画板属性,如颜色,是否填充等。
*
* */
case STROKE:{
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(18);
paint.setColor(Color.RED);
canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根据进度画圆弧
/*最外围黄色圆弧*/
paint.setStrokeWidth(9);
paint.setColor(Color.YELLOW);
canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //根据进度画圆弧
break;
}
case FILL:{
paint.setStyle(Paint.Style.FILL_AND_STROKE);
paint.setStrokeWidth(18);
paint.setColor(Color.RED);
if(progress !=0)
/*最外围红色圆弧*/
canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根据进度画圆弧
/*最外围黄色圆弧*/
paint.setStrokeWidth(9);
paint.setColor(Color.YELLOW);
canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //
break;
}
}
}
}
四、Xml布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:android_custom="http://schemas.android.com/apk/res/tester.ermu.com.pingamedemo"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#000000"
tools:ignore="ResAuto">
<tester.ermu.com.pingamedemo.RoundProgressBar
android:id="@+id/roundBar"
android:layout_width="200dip"
android:layout_height="200dip"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:layout_marginBottom="79dp"
android_custom:roundColor="#ffffff"
android_custom:roundProgressColor="@android:color/black"
android_custom:textColor="#9A32CD"
android_custom:roundWidth="15dip"
android_custom:textSize="18sp" />
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="#ffffff"
android:layout_margin="5dp"
android:text="开始" />
</LinearLayout>
五、MainActivity中代码的引用
package tester.ermu.com.pingamedemo;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener{
private RoundProgressBar roundBar ;
private int progress = 0;
private Button button1,button2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cricle_progress);
init();
}
private void init() {
roundBar = (RoundProgressBar) findViewById(R.id.roundBar);
button1 = (Button)findViewById(R.id.button1);
button1.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.button1:
new Thread(new Runnable() {
@Override
public void run() {
while(progress <= 100){
progress += 3;
System.out.println(progress);
roundBar.setProgress(progress);
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
break;
}
}
}
六、自定义属性
<?xml version="1.0" encoding="UTF-8"?>
<resources>
<declare-styleable name="RoundProgressBar">
<attr name="roundColor" format="color"/>
<attr name="roundProgressColor" format="color"/>
<attr name="roundWidth" format="dimension"></attr>
<attr name="textColor" format="color" />
<attr name="textSize" format="dimension" />
<attr name="max" format="integer"></attr>
<attr name="textIsDisplayable" format="boolean"></attr>
<attr name="style">
<enum name="STROKE" value="0"></enum>
<enum name="FILL" value="1"></enum>
</attr>
</declare-styleable>
</resources>