模仿小米時鐘

我在一個[博客](http://blog.csdn.net/qq_31715429/article/details/54668668)上面看到了小米時鐘實現.特別感興趣.就認真的看了一遍.並自己敲了一遍.下面說下我自己的理解和我的一些改進的地方效果真的特別棒就發佈了自己的時鐘應用--下載地址

先上圖(電腦沒有gif截圖軟件.大家湊合看.哪個軟件好也可以給我推薦下)

話不多說,首先自定義控件XimiClockView繼承view  並做一些初始化的操作

public XimiClockView(Context context) {
        super(context);
        init(context, null);
    }

    public XimiClockView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    public XimiClockView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context, attrs);
    }

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public XimiClockView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        init(context, attrs);
    }

    /**
     * 進行一些初始化的操作
     *
     * @param context
     * @param attrs
     */
    private void init(Context context, AttributeSet attrs) {
        if (attrs == null) return;
        TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.MyClockView);
        backGroundColor = array.getColor(R.styleable.MyClockView_clockBackColor, Color.parseColor("#2078A8"));
        drakColor = array.getColor(R.styleable.MyClockView_clockDarkColor, Color.parseColor("#96C2D8"));
        lightColor = array.getColor(R.styleable.MyClockView_clockLightColor, Color.parseColor("#ffffff"));
        array.recycle();//注意這裏別忘了調用recycle()方法,[原因](http://www.cnblogs.com/kissazi2/p/4049982.html)
        //設置背景色
        setBackgroundColor(backGroundColor);
        //文本畫筆
        textPaint = new Paint();
        textPaint.setColor(drakColor);
        textPaint.setTextSize(25);
        textRect = new Rect();
    }

然後在onSizeChange方法中調用獲取時鐘半徑,和一些其他的計算

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        //獲取時鐘的半徑
        mRadius = Math.min(w - getPaddingLeft() - getPaddingRight(), h - getPaddingTop() - getPaddingBottom()) / 2;
        //爲了防止時鐘旋轉的時候超出了界限,默認加一個padding值
        defaultPadding = 0.12f * mRadius;
        //圓弧的寬度
        mCircleWidth = 0.012f * mRadius;
        //圓環的寬度
        mCircleRingWidth = 0.12f*mRadius;
        paddingLeft = w / 2 - mRadius + getPaddingLeft() + defaultPadding;
        paddingTop = h / 2 - mRadius + getPaddingTop() + defaultPadding;
        paddingRight = w / 2 - mRadius + getPaddingRight() + defaultPadding;
        paddingBottom = h / 2 - mRadius + getPaddingBottom() + defaultPadding;
        mSweepGradient = new SweepGradient(w / 2,h / 2 ,new int[]{drakColor,lightColor},new float[]{0.75f,1f});
    }

畫Text

@Override
    protected void onDraw(Canvas canvas) {
        mCanvas = canvas;
        drawTimeText();
    }

    /**
     * 畫12 /3 /6 /9時間
     */
    private void drawTimeText() {
        String str = "12";
        textPaint.getTextBounds(str, 0, str.length(), textRect);
        int lengthTextWidth = textRect.width();
        int textHeight = textRect.height();
        int width=getWidth();
        int height=getHeight();
        mCanvas.save();//保存畫布的狀態
        mCanvas.drawText(str, width / 2-lengthTextWidth/2,paddingTop+textHeight,textPaint);
        str="3";
        textPaint.getTextBounds(str, 0, str.length(), textRect);
        int smallTextWidth = textRect.width();
        mCanvas.drawText("3",width-paddingRight-lengthTextWidth/2-smallTextWidth/2,height/2+textHeight/2,textPaint);
        mCanvas.drawText("6",width / 2-smallTextWidth/2,height-paddingBottom,textPaint);
        mCanvas.drawText("9",paddingLeft,height/2+textHeight/2,textPaint);
        mCanvas.restore();//取出畫布的狀態
    }

崩潰寫完了,我發表時候提示我沒有登錄,然後發表異常,然後我一刷新沒了,,,又重新寫一遍,

接下來畫圓弧

  /**
     * 畫圓弧
     */
    private void drawCircleArc() {
        mCanvas.save();
        mCirclePaint.setStyle(Paint.Style.STROKE);//設置空心模式
        mCirclePaint.setStrokeWidth(mCircleWidth);//設置圓弧寬度
        mCircleRectF.set(paddingLeft + textRect.width() / 2, paddingTop + textRect.height() / 2, getWidth() - paddingRight - textRect.width() / 2, getHeight() - paddingBottom - textRect.height() / 2);
        for (int x = 0; x < 4; x++) {
        //圓弧分四段來畫,一段話80度
            mCanvas.drawArc(mCircleRectF, 5 + 90 * x, 80, false, mCirclePaint);
        }
        mCanvas.restore();
    }

畫刻度

/**
     * 畫圓環和刻度
     */
    private void drawCircleRing() {
        mCanvas.save();
        //畫圓環
        mCircleRingRectF.set(paddingLeft+textRect.height()/2+1.5f*mCircleRingWidth,paddingTop+textRect.height()/2+1.5f*mCircleRingWidth,getWidth()-paddingRight-textRect.height()/2-1.5f*mCircleRingWidth,
                getHeight()-paddingBottom-textRect.height()/2-1.5f*mCircleRingWidth);
        mMatrix.setRotate(mDegreeS-90,getWidth()/2,getHeight()/2);
        mSweepGradient.setLocalMatrix(mMatrix);
        mCircleRingPaint.setStyle(Paint.Style.STROKE);
        mCircleRingPaint.setStrokeWidth(mCircleRingWidth);
        mCircleRingPaint.setShader(mSweepGradient);
        mCanvas.drawArc(mCircleRingRectF,0,360,false,mCircleRingPaint);
        //畫刻度
        mScaleLinePaint.setStrokeWidth(0.1f*mCircleRingWidth);//設置線的寬度
        for (int i=0;i<200;i++){
            //畫刻度線
            mCanvas.drawLine(getWidth()/2,paddingTop+textRect.height()/2+mCircleRingWidth,getWidth()/2,paddingTop+textRect.height()/2+2*mCircleRingWidth,mScaleLinePaint);
            mCanvas.rotate(1.8f,getWidth()/2,getHeight()/2);//旋轉角度
        }
        mCanvas.restore();
    }

畫秒針

    /**
     * 畫秒針
     * 秒針針是不規則的圖形
     * 就用到了Path這個類
     *
     */
    private void drawSoundHand() {
        mCanvas.save();
        path.reset();
        mCanvas.rotate(mDegreeS,getWidth()/2,getHeight()/2);//旋轉的角度和旋轉的圓心
        path.moveTo(getWidth()/2,paddingTop+textRect.height()/2+0.27f*mRadius);//開始的點
        path.lineTo(getWidth()/2+0.03f*mRadius,paddingTop+textRect.height()/2+0.31f*mRadius);//直線到這個位置
        path.lineTo(getWidth()/2-0.03f*mRadius,paddingTop+textRect.height()/2+0.31f*mRadius);//直線到這個位置
        path.close();
        mCanvas.drawPath(path,mSoundHandPaint);
        mCanvas.restore();
    }

畫時針


    /**
     * 畫時針
     */
    private void drawHourHand() {
        mCanvas.save();
        mCanvas.rotate(mDegreeH,getWidth()/2,getHeight()/2);
        hourHandPath.reset();
        hourHandPath.moveTo(getWidth()/2-0.02f*mRadius,getHeight()/2);
        hourHandPath.lineTo(getWidth()/2-0.01f*mRadius,getHeight()/2-0.35f*mRadius);
        //貝塞爾曲線
        hourHandPath.quadTo(getWidth()/2,getHeight()/2-0.38f*mRadius,getWidth()/2+0.01f*mRadius,getHeight()/2-0.35f*mRadius);
        hourHandPath.lineTo(getWidth()/2+0.02f*mRadius,getHeight()/2);
        hourHandPath.close();
        mCanvas.drawPath(hourHandPath,mHourHandPaint);
        mCanvas.restore();
    }

畫分針

  /**
     * 畫分針
     */
    private void drawMinnuteHand() {
        mCanvas.save();
        mCanvas.rotate(mDegreeM,getWidth()/2,getHeight()/2);
        mMinutePath.reset();
        mMinutePath.moveTo(getWidth()/2-0.012f*mRadius,getHeight()/2);
        mMinutePath.lineTo(getWidth()/2-0.006f*mRadius,getHeight()/2-0.40f*mRadius);
        mMinutePath.quadTo(getWidth()/2,getHeight()/2-0.43f*mRadius,getWidth()/2+0.006f*mRadius,getHeight()/2-0.40f*mRadius);
        mMinutePath.lineTo(getWidth()/2+0.012f*mRadius,getHeight()/2);
        mMinutePath.close();
        mCanvas.drawPath(mMinutePath,mMinutePaint);
        //畫圈圈蓋着時針的尾部
        mCanvas.drawCircle(getWidth()/2,getHeight()/2,0.03f*mRadius,mMinutePaint);
        mCanvas.drawCircle(getWidth()/2,getHeight()/2,0.015f*mRadius,mCircleMinPaint);
        mCanvas.restore();
    }

上我的measure的方法

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        setMeasuredDimension(getMeasure(widthMeasureSpec), getMeasure(heightMeasureSpec));
    }

    private int getMeasure(int measureSpec) {
        int result;
        int mode = MeasureSpec.getMode(measureSpec);
        int size = MeasureSpec.getSize(measureSpec);
        if (mode == MeasureSpec.EXACTLY) {
            result = size;
        } else {
            result = 800;
            if (mode == MeasureSpec.AT_MOST) {
                result = Math.min(result, size);
            }
        }
        return result;
    }

這個時候開始做3D效果的旋轉 ,重寫ontouch來實現
@Override
public boolean onTouchEvent(MotionEvent event) {
    switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            if (valueAnimator!=null&&valueAnimator.isRunning()){//注意加上判斷否者會觸瓶會卡頓的哦
            valueAnimator.cancel();
        }
            getEvent(event);
            break;
        case MotionEvent.ACTION_MOVE:
            getEvent(event);
            break;

    }
    return true;
}
 private void getEvent(MotionEvent event) {
    //獲取x,y軸的座標點
    float x = event.getX();
    float y = event.getY();

    float rotateX = -(y - getWidth() / 2);
    float rotateY = (x - getHeight() / 2);
    //計算比例
    float[] scale = getScale(rotateX, rotateY);
    //計算偏移量
    rotX = scale[0] * mMaxTranslateRotate;
    rotY = scale[1] * mMaxTranslateRotate;
}
//
private float[] getScale(float x, float y) {
    float[] scale = new float[2];
    float rotateX = x / mRadius;
    float rotateY = y / mRadius;
    if (rotateX > 1)
        rotateX = 1;
    else if (rotateX < -1)
        rotateX = -1;
    if (rotateY > 1)
        rotateY = 1;
    else if (rotateY < -1)
        rotateY = -1;
    scale[0] = rotateX;
    scale[1] = rotateY;
    return scale;
}

這裏只是,做了旋轉,旋轉之後做一個動畫回到原來的位置
 case MotionEvent.ACTION_UP:
                stratAnim();
                break;

private void stratAnim() {
        final String cameraRotateXName = "cameraRotateX";
        final String cameraRotateYName = "cameraRotateY";

        PropertyValuesHolder rotateXHoler = PropertyValuesHolder.ofFloat(cameraRotateXName, rotX, 0);
        PropertyValuesHolder rotateYHolder = PropertyValuesHolder.ofFloat(cameraRotateYName, rotY, 0);

        valueAnimator = ValueAnimator.ofPropertyValuesHolder(rotateXHoler, rotateYHolder);
        valueAnimator.setDuration(800);
            valueAnimator.setInterpolator(new TimeInterpolator() {
            @Override
            public float getInterpolation(float input) {
                //http://inloop.github.io/interpolator/
                float f = 0.571429f;
                return (float) (Math.pow(2, -2 * input) * Math.sin((input - f / 4) * (2 * Math.PI) / f) + 1);
            }
        });
        valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                rotX = (float) animation.getAnimatedValue(cameraRotateXName);
                rotY = (float) animation.getAnimatedValue(cameraRotateYName);
            }
        });
        valueAnimator.start();
    }

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