安卓Android自定义控件之自定义时钟

来源：互联网发布：5s是否支持4g网络编辑：程序博客网时间：2024/05/01 10:34

源码地址： https://github.com/senonwx/CustomClock.git

作出的效果

贴出核心代码

1.绘制表盘

private void drawCircle(Canvas canvas) {    mPaint.setStyle(Paint.Style.STROKE);    canvas.drawCircle(width/2,height/2,width/2-padding,mPaint);}

2.绘制刻度

private void drawScale(Canvas canvas){        mPaint.setStyle(Paint.Style.FILL);        for (int i = 0; i < 12; i++) {            if(i % 3 == 0)                canvas.drawLine(width/2,padding,height/2,padding+4+20,mPaint);            else                canvas.drawLine(width/2,padding,height/2,padding+4+10,mPaint);            canvas.rotate(30,width/2,height/2);        }    }

3.绘制指针

private void drawPointer(Canvas canvas){        mCalendar = Calendar.getInstance();        mHour = mCalendar.get(Calendar.HOUR);        mMinute = mCalendar.get(Calendar.MINUTE);        mSecond = mCalendar.get(Calendar.SECOND);        //时针        mDegrees = mHour * 30 + mMinute / 2;        mPaint.setColor(Color.BLACK);        mPaint.setStrokeWidth(6);        canvas.save();        canvas.rotate(mDegrees,width/2,height/2);        canvas.drawLine(width/2,height/2,width/2,height/2-mHourLine,mPaint);        canvas.restore();        //分针        mPaint.setColor(Color.GRAY);        mPaint.setStrokeWidth(4);        mDegrees = mMinute * 6 + mSecond / 10;        canvas.save();        canvas.rotate(mDegrees,width/2,height/2);        canvas.drawLine(width/2,height/2,width/2,height/2-mMinuateLine,mPaint);        canvas.restore();        //秒针        mPaint.setStrokeWidth(2);        mPaint.setColor(Color.GREEN);        mDegrees = mSecond * 6;        canvas.save();        canvas.rotate(mDegrees,width/2,width/2);        canvas.drawLine(width/2,height/2,width/2,height/2-mSecondLine,mPaint);        canvas.restore();        mPaint.setColor(Color.BLACK);    }

4.绘制文字

private void drawStr(Canvas canvas){        mPaint.setTextSize(40);        StringBuffer sb = new StringBuffer();        if(mHour<10){            sb.append("0").append(String.valueOf(mHour)).append(":");        }else{            sb.append(String.valueOf(mHour)).append(":");        }        if(mMinute<10){            sb.append("0").append(String.valueOf(mMinute)).append(":");        }else{            sb.append(String.valueOf(mMinute)).append(":");        }        if(mSecond<10){            sb.append("0").append(String.valueOf(mSecond));        }else{            sb.append(String.valueOf(mSecond));        }        String time = sb.toString();        int strW = (int) mPaint.measureText(time);        canvas.drawText(time,width/2-strW/2,height/2+60,mPaint);    }

5.实现指针转动

private Handler mHandler = new Handler(){        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            invalidate();        }    };

    @Override    protected void onDraw(Canvas canvas) {        drawCircle(canvas);        drawScale(canvas);        drawPointer(canvas);        drawStr(canvas);        mHandler.sendEmptyMessage(0);    }

源码地址在最上方哦！！！

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