我在一個[博客] android高仿小米時鐘（使用Camera和Matrix實現3D效果）上面看到了小米時鐘實現.特別感興趣.就認真的看了一遍.并自己敲了一遍.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布了自己的時鐘應用。
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 并做一些初始化的操作
看到的漂亮時鐘圖片我自己畫的效果圖(以后媽媽再也不用擔心我遲到了)
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();//注意這里別忘了調用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(); }然后在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; //為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,然后發表異常,然后我一刷新沒了,,,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); //畫圈圈蓋著時針的尾部 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; }以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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