android 小米时钟的实现
16lz
2021-01-23
不多说，先上个效果图
代码也贴出来了：
package com.example.administrator.testmyidea.myView;import android.content.Context;import android.graphics.*;import android.util.AttributeSet;import android.view.View;import java.util.Timer;import java.util.TimerTask;public class xiaomiClock extends View { private Paint textPaint,colokPaint,rPaint,paint; private Path mTriangle; private Timer mTimer; private float agree=0; Shader fshader,mshader; PathEffect mEffect; public xiaomiClock(Context context) { super(context); } public xiaomiClock(Context context, AttributeSet attrs) { super(context, attrs); mEffect=new DashPathEffect(new float[]{4,6,},0); mshader=new SweepGradient(500,500,Color.parseColor("#1d8a7d"),Color.WHITE); fshader=new SweepGradient(500,500,Color.GREEN,Color.RED); textPaint=new Paint(); textPaint.setStrokeWidth(16); textPaint.setColor(Color.WHITE); textPaint.setStrokeCap(Paint.Cap.ROUND); textPaint.setAntiAlias(true); colokPaint=new Paint(); colokPaint.setStrokeWidth(8); colokPaint.setColor(Color.parseColor("#018172")); colokPaint.setAntiAlias(true); colokPaint.setStrokeCap(Paint.Cap.ROUND); paint =new Paint(); paint.setAntiAlias(true); rPaint = new Paint(); rPaint.setColor(Color.WHITE); rPaint.setAntiAlias(true); rPaint.setStyle(Paint.Style.STROKE); mTriangle=new Path(); mTriangle.moveTo(791, 500);// 此点为多边形的起点 mTriangle.lineTo((float) (791-Math.sqrt(1200)), 525); mTriangle.lineTo((float) (791-Math.sqrt(1200)), 475); mTriangle.close(); setmTimer(); System.out.println("度数"+((float)6.0/10)); } @Override protected void onDraw(Canvas canvas) { canvas.drawColor(Color.parseColor("#018172")); //中心小圆 canvas.drawCircle(500,500,19,textPaint); //外围白色圆圈 canvas.drawCircle(500,500,230,rPaint);// //手表指针 colokPaint.setColor(Color.WHITE); canvas.drawLine(500,500,500+getheith(200,100),600,colokPaint); canvas.drawLine(500,500,500+getheith(140,70),400,colokPaint); canvas.drawPoint(350,500+getheith(230,150),textPaint); colokPaint.setColor(Color.parseColor("#018172"));// //手表最中心绿色小圆 canvas.drawCircle(500,500,10,colokPaint); //绘画手表盘 drawbeauty(canvas); } public void drawbeauty(Canvas canvas){ int canvasWidth = canvas.getWidth(); int canvasHeight = canvas.getHeight(); //设置缓存层，因为下面要实用xfermode，使用xfemode必须使用缓存层，否则会出现黑色背景 int layerId = canvas.saveLayer(0, 0, canvasWidth, canvasHeight, null, Canvas.ALL_SAVE_FLAG); //初始化画笔，因为上下两层做画需要的画笔属性不一样，所以只能每次重新设置一次 //设置画笔为不填充模式 paint.setStyle(Paint.Style.STROKE); //设置笔画样式，这里设置的是虚线样式 paint.setPathEffect(mEffect); //设置笔画宽度 paint.setStrokeWidth(40); //画一个纯色表盘，虚线，空心圆形 canvas.drawCircle(500,500,320,paint); //设置画笔属性，SRC_IN属性，让第二个图案只能花在第一个图案上面，也就是只能画在上面所说那个纯色表盘里面 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); //把画笔虚线属性去掉，因为我要的是一个实心圆形，然后让这个实心但是颜色不一样圆形画在上面所说表盘上面， // 因为设置了xfermode，所以显示的一样会是虚线圆形表盘，但是颜色会变成你现在的颜色 paint.setPathEffect(null); //设置画笔shader属性，这里设置的是SweepGradient模式，可以让颜色过渡泾渭分明，以圆形为中心开始变化 paint.setShader(mshader); paint.setStyle(Paint.Style.FILL); //保存画布 canvas.save(); //旋转画布，然后你就会发现时钟表盘开始动了 canvas.rotate(agree,500,500); canvas.drawRect(100, 100, 900, 900, paint); canvas.drawPath(mTriangle,textPaint); canvas.restore(); //最后将画笔去除Xfermode paint.setXfermode(null); canvas.restoreToCount(layerId); } private void setmTimer(){ mTimer=new Timer(); mTimer.schedule(new TimerTask() { @Override public void run() { agree=agree+((float)6.0/100); if(agree>360)agree=0; System.out.println("旋转"+agree); postInvalidate(); } },100,10); } private float getheith(int xie,int di){ return (float) Math.sqrt(Math.pow(xie,2)-Math.pow(di,2)); }}更多相关文章
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