Android自定义带圆点的半圆形进度条
本文实例为大家分享了Android自定义带圆点的半圆形进度条,供大家参考,具体内容如下
仅限用于半圆形,如须要带圆点的圆形进度条,圆点会出现错位现象,此代码仅供,带圆点的圆形进度条有空研究一下!图片效果在下方,
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.util.AttributeSet; import android.view.View; /** * 自定义带圆点的进度条 */ public class HalfProgressBar extends View{ private int maxProgress = 100; //设置进度条背景宽度 private float progressStrokeWidth = 3; //设置进度条进度宽度 private float marxArcStorkeWidth = 6; //设置进度条圆点的宽度 private float circularDotWidth=15; /** * 画笔对象的引用 */ private Paint paint; public synchronized int getProgress() { return progress; } /** * Android提供了Invalidate方法实现界面刷新,但是Invalidate不能直接在线程中调用,因为他是违背了单线程模型:Android UI操作并不是线程安全的,并且这些操作必须在UI线程中调用。 * 而postInvalidate()在工作者线程中被调用 使用postInvalidate则比较简单,不需要handler,直接在线程中调用postInvalidate即可。 * @param progress 传过来的进度 */ public void setProgress(int progress) { if (progress < 0) { progress = 0; } if (progress > maxProgress) { progress = maxProgress; } if (progress <= maxProgress) { this.progress = progress; postInvalidate(); } } /** * 当前进度 */ private int progress = 99; private RectF oval; private int roundProgressColor; private int roundColor; private int circularDotColor; public HalfProgressBar(Context context) { super(context); } public HalfProgressBar(Context context, AttributeSet attrs) { super(context, attrs); paint = new Paint(); oval = new RectF(); //这是自定义view 必须要写的 TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.HalfProgressBar); roundProgressColor = mTypedArray.getColor(R.styleable.HalfProgressBar_roundProgressColor1, Color.YELLOW); roundColor=mTypedArray.getColor(R.styleable.HalfProgressBar_roundColor1, Color.YELLOW); circularDotColor=mTypedArray.getColor(R.styleable.HalfProgressBar_circularDotColor1, Color.YELLOW); } public HalfProgressBar(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); paint = new Paint(); oval = new RectF(); TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.HalfProgressBar); roundProgressColor = mTypedArray.getColor(R.styleable.HalfProgressBar_roundProgressColor1, Color.YELLOW); roundColor=mTypedArray.getColor(R.styleable.HalfProgressBar_roundColor1, Color.YELLOW); } @Override protected void onDraw(Canvas canvas) { // TODO 自动生成的方法存根 super.onDraw(canvas); float width = getWidth(); float height = getHeight(); paint.setAntiAlias(false); // 设置画笔为抗锯齿 paint.setColor(roundColor); // 设置画笔颜色 paint.setStrokeWidth(progressStrokeWidth); // 线宽 paint.setStyle(Paint.Style.STROKE); oval.left = marxArcStorkeWidth / 2; // 左上角x oval.top = circularDotWidth; // 左上角y oval.right = width - circularDotWidth / 2; // 左下角x oval.bottom = width - circularDotWidth / 2; // 右下角y float bangjing = ((width - circularDotWidth/2) / 2);//半径 //调整圆背景的大小 canvas.drawArc(oval, 180, 180, false, paint); // 绘制红丝圆圈,即进度条背景 //进度条颜色 paint.setColor(roundProgressColor); paint.setStrokeWidth(marxArcStorkeWidth); canvas.drawArc(oval, 180, 180 * ((float) progress / (float) maxProgress), false, paint); // 绘制进度圆弧,这里是蓝色 //画圆点 paint.setColor(circularDotColor); paint.setAntiAlias(true); // 设置画笔为抗锯齿 paint.setStyle(Paint.Style.FILL); paint.setStrokeWidth(circularDotWidth); //当画笔样式为STROKE或FILL_OR_STROKE时,设置笔刷的图形样式,如圆形样式Cap.ROUND,或方形样式Cap.SQUARE paint.setStrokeCap(Paint.Cap.ROUND); float jindu = ((float) progress * 1.8f); canvas.drawPoint(bangjing - ((float) (Math.sin((Math.PI / (double) 180) * (jindu <= 90 ? 90 - (jindu) : -jindu + 90))) * bangjing), bangjing+circularDotWidth - ((float) (Math.cos((Math.PI / (double) 180) * (double) (jindu <= 90 ? 90 - jindu : -jindu + 90))) * bangjing), paint); } }
attrs.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <!--自定义半圆形加载进度条--> <declare-styleable name="HalfProgressBar"> <attr name="roundColor1" format="color"/> <attr name="roundProgressColor1" format="color"/> <attr name="circularDotColor1" format="color"/> </declare-styleable> </resources>
xml中
<com.jyc99.demo.HalfProgressBar android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/view" android:layout_centerHorizontal="true" android:layout_marginTop="42dp" android_custom:roundColor1="#fc422b" android_custom:roundProgressColor1="#fa432e" android_custom:circularDotColor1="#246223"/>
由于截图的原因可能看不到圆点 , 大家自己试试调调颜色 调整一下高度宽度
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
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