iOS的芝麻信用分截圖.png
前言
靈感來自幾天前看到簡書一位作者的仿芝麻信用自定義View的文章,很不錯,所以我換了一種方式來進行實現(xiàn)概页，寫了舊版和新版芝麻信用分儀表盤的效果.
Github地址:HotBitmapGG/CreditSesameRingView
截圖
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這是我做的效果,還是有點差距的,嘿嘿.
正文
- 9.9版本芝麻信用分的實現(xiàn)
首先初始化各種畫筆,默認的size原探，padding惶看，小圓點.
(因為實在找不到原版芝麻信用的帶點模糊效果的小圓點,所以只好用這個代替)
//View的默認大小
defaultSize = dp2px(250);
//默認Padding大小
arcDistance = dp2px(14);
//外層圓環(huán)畫筆
mMiddleArcPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mMiddleArcPaint.setStrokeWidth(8);
mMiddleArcPaint.setColor(Color.WHITE);
mMiddleArcPaint.setStyle(Paint.Style.STROKE);
mMiddleArcPaint.setAlpha(80);
//內(nèi)層圓環(huán)畫筆
mInnerArcPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mInnerArcPaint.setStrokeWidth(30);
mInnerArcPaint.setColor(Color.WHITE);
mInnerArcPaint.setAlpha(80);
mInnerArcPaint.setStyle(Paint.Style.STROKE);
//正中間字體畫筆
mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mTextPaint.setColor(Color.WHITE);
mTextPaint.setTextAlign(Paint.Align.CENTER);
//圓環(huán)大刻度畫筆
mCalibrationPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mCalibrationPaint.setStrokeWidth(4);
mCalibrationPaint.setStyle(Paint.Style.STROKE);
mCalibrationPaint.setColor(Color.WHITE);
mCalibrationPaint.setAlpha(120);
//圓環(huán)小刻度畫筆
mSmallCalibrationPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mSmallCalibrationPaint.setStrokeWidth(1);
mSmallCalibrationPaint.setStyle(Paint.Style.STROKE);
mSmallCalibrationPaint.setColor(Color.WHITE);
mSmallCalibrationPaint.setAlpha(130);
//圓環(huán)刻度文本畫筆
mCalibrationTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mCalibrationTextPaint.setTextSize(30);
mCalibrationTextPaint.setColor(Color.WHITE);
//外層進度畫筆
mArcProgressPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mArcProgressPaint.setStrokeWidth(8);
mArcProgressPaint.setColor(Color.WHITE);
mArcProgressPaint.setStyle(Paint.Style.STROKE);
mArcProgressPaint.setStrokeCap(Paint.Cap.ROUND);
//外層圓環(huán)上小圓點Bitmap畫筆
mBitmapPaint = new Paint();
mBitmapPaint.setStyle(Paint.Style.FILL);
mBitmapPaint.setAntiAlias(true);
//初始化小圓點圖片
bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_circle);
//當前點的實際位置
pos = new float[2];
//當前點的tangent值
tan = new float[2];
matrix = new Matrix();
代碼很簡單,就是各種初始化,往下看.
View的測量,主要在給設(shè)置warp_content時候給定一個默認寬高值.
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
setMeasuredDimension(resolveMeasure(widthMeasureSpec, defaultSize),
resolveMeasure(heightMeasureSpec, defaultSize));}
//根據(jù)傳入的值進行測量
public int resolveMeasure(int measureSpec, int defaultSize){
int result = 0;
int specSize = MeasureSpec.getSize(measureSpec);
switch (MeasureSpec.getMode(measureSpec))
{
case MeasureSpec.UNSPECIFIED:
result = defaultSize;
break;
case MeasureSpec.AT_MOST:
//設(shè)置warp_content時設(shè)置默認值
result = Math.min(specSize, defaultSize);
break;
case MeasureSpec.EXACTLY:
//設(shè)置math_parent 和設(shè)置了固定寬高值
break;
default:
result = defaultSize;
}
return result;}
然后確定View的寬高后的回調(diào)方法.
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh){
super.onSizeChanged(w, h, oldw, oldh);
width = w;
height = h;
radius = width / 2;
//外層圓環(huán)矩形
mMiddleRect = new RectF(defaultPadding, defaultPadding,width - defaultPadding, height - defaultPadding);
//內(nèi)層圓環(huán)矩形
mInnerRect = new RectF(defaultPadding + arcDistance, defaultPadding + arcDistance,width - defaultPadding - arcDistance, height - defaultPadding - arcDistance);
// 外層進度矩形
mMiddleProgressRect = new RectF(defaultPadding, defaultPadding,width - defaultPadding, height - defaultPadding);
}
這里就是初始化圓弧所需要的矩形實現(xiàn),下邊開始進行重點,繪制趁俊，
繪制外層的圓弧,很簡單, 圓弧的起始角度,角度.
private void drawMiddleArc(Canvas canvas){
canvas.drawArc(mMiddleRect, mStartAngle, mEndAngle, false, mMiddleArcPaint);
}
繪制內(nèi)層圓弧
private void drawInnerArc(Canvas canvas){
canvas.drawArc(mInnerRect, mStartAngle, mEndAngle, false, mInnerArcPaint);
}
繪制內(nèi)層圓弧上的小刻度,畫布旋轉(zhuǎn)到圓弧左下角起點,計算出每條刻度線的起始點后,整個圓弧是210度,
每6角度繪制一條刻度線.
private void drawSmallCalibration(Canvas canvas){
//旋轉(zhuǎn)畫布
canvas.save();
canvas.rotate(-105, radius, radius);
//計算刻度線的起點結(jié)束點
int startDst = (int) (defaultPadding + arcDistance - mInnerArcPaint.getStrokeWidth() / 2 - 1);
int endDst = (int) (startDst + mInnerArcPaint.getStrokeWidth());
for (int i = 0; i <= 35; i++) {
//每旋轉(zhuǎn)6度繪制一個小刻度
canvas.drawLine(radius, startDst, radius, endDst, mSmallCalibrationPaint);
canvas.rotate(6, radius, radius);
}
canvas.restore();
}
繪制內(nèi)層圓弧上的大刻度,350, 550, 600,650, 700, 950，對應的信用分值,
一樣旋轉(zhuǎn)畫布,計算刻度線的起始點,計算出每次旋轉(zhuǎn)的角度,每35度旋轉(zhuǎn)一次,依次繪制對應的大刻度線,
然后繪制對應的文本內(nèi)容,使用paint的measureText方法測量出文本的長度,依次繪制對應的文本內(nèi)容.
private void drawCalibrationAndText(Canvas canvas){
//旋轉(zhuǎn)畫布進行繪制對應的刻度
canvas.save();
canvas.rotate(-105, radius, radius);
//計算刻度線的起點結(jié)束點
int startDst = (int) (defaultPadding + arcDistance - mInnerArcPaint.getStrokeWidth() / 2 - 1);
int endDst = (int) (startDst + mInnerArcPaint.getStrokeWidth());
//刻度旋轉(zhuǎn)的角度
int rotateAngle = 210 / 10;
for (int i = 1; i < 12; i++) {
if (i % 2 != 0)
{
canvas.drawLine(radius, startDst, radius, endDst, mCalibrationPaint);
}
// 測量文本的長度
float textLen = mCalibrationTextPaint.measureText(sesameStr[i - 1]);
canvas.drawText(sesameStr[i - 1], radius - textLen / 2, endDst + 40, mCalibrationTextPaint);
canvas.rotate(rotateAngle, radius, radius);
}
canvas.restore();}
繪制中間的信用分值,信用等級,評估時間等文本,這個比較簡單,直接drawText,依次高低排列繪制即可.
private void drawCenterText(Canvas canvas){
//繪制Logo
mTextPaint.setTextSize(30);
canvas.drawText("BETA", radius, radius - 130, mTextPaint);
//繪制信用分數(shù)
mTextPaint.setTextSize(200);
mTextPaint.setStyle(Paint.Style.STROKE);
canvas.drawText(String.valueOf(mMinNum), radius, radius + 70, mTextPaint);
//繪制信用級別
mTextPaint.setTextSize(80);
canvas.drawText(sesameLevel, radius, radius + 160, mTextPaint);
//繪制評估時間
mTextPaint.setTextSize(30);
canvas.drawText(evaluationTime, radius, radius + 205, mTextPaint);
}
繪制最外層的進度,這里使用的Path添加要繪制的圓弧,因為需要去不斷的計算坐標點,主要用到了PathMeasure這個類,將繪制的圓弧加入到path中,
當前點的實際位置
private float[] pos;
當前的tangent值
private float[] tan;
獲取路徑的終點的正切值和坐標洲押，然后根據(jù)坐標點繪制小圓點
PathMeasure pathMeasure = new PathMeasure(path, false);
pathMeasure.getPosTan(pathMeasure.getLength() * 1, pos, tan);
關(guān)于PathMeasure,推薦看GcsSloop/AndroidNote ,我也是跟著這個筆記學習的自定義控件.
private void drawRingProgress(Canvas canvas){
Path path = new Path();
path.addArc(mMiddleProgressRect, mStartAngle, mCurrentAngle);
PathMeasure pathMeasure = new PathMeasure(path, false);
pathMeasure.getPosTan(pathMeasure.getLength() * 1, pos, tan);
matrix.reset();
matrix.postTranslate(pos[0] - bitmap.getWidth() / 2, pos[1] - bitmap.getHeight() / 2);
canvas.drawPath(path, mArcProgressPaint);
//起始角度不為0時候才進行繪制小圓點
if (mCurrentAngle == 0)
return;
canvas.drawBitmap(bitmap, matrix, mBitmapPaint);
mBitmapPaint.setColor(Color.WHITE);
canvas.drawCircle(pos[0], pos[1], 8, mBitmapPaint);
}
好了,到這里所有繪制完畢了,接下來讓圓弧進度條動起來吧,使用ValueAnimator,
進度條動畫定義了圓弧進度條的開始角度mCurrentAngle,圓弧角度mTotalAngle,
數(shù)值動畫定義了初始化minNum=0设塔，maxNum根據(jù)傳入的數(shù)值進行計算.
public void startAnim(){
ValueAnimator mAngleAnim = ValueAnimator.ofFloat(mCurrentAngle, mTotalAngle);
mAngleAnim.setInterpolator(new AccelerateDecelerateInterpolator());
mAngleAnim.setDuration(3000);
mAngleAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener(){
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator){
mCurrentAngle = (float) valueAnimator.getAnimatedValue();
postInvalidate();
}
});
mAngleAnim.start();
ValueAnimator mNumAnim = ValueAnimator.ofInt(mMinNum, mMaxNum);
mNumAnim.setDuration(3000);
mNumAnim.setInterpolator(new LinearInterpolator());
mNumAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator){
mMinNum = (int) valueAnimator.getAnimatedValue();
postInvalidate();
}
});
mNumAnim.start();}
最后根據(jù)傳入的信用分值計算圓弧進度條所到的角度.
public void setSesameValues(int values){
if (values <= 350){
mMaxNum = values;
mTotalAngle = 0f;
sesameLevel = "信用較差";
evaluationTime = "評估時間:" + getCurrentTime();
} else if (values <= 550){
mMaxNum = values;
mTotalAngle = (values - 350) * 80 / 400f + 2;
sesameLevel = "信用較差";
evaluationTime = "評估時間:" + getCurrentTime();
} else if (values <= 700)
{
mMaxNum = values;
if (values > 550 && values <= 600){
sesameLevel = "信用中等";
} else if (values > 600 && values <= 650){
sesameLevel = "信用良好";
} else {
sesameLevel = "信用優(yōu)秀";
}
mTotalAngle = (values - 550) * 120 / 150f + 43;
evaluationTime = "評估時間:" + getCurrentTime();
} else if (values <= 950){
mMaxNum = values;
mTotalAngle = (values - 700) * 40 / 250f + 170;
sesameLevel = "信用極好";
evaluationTime = "評估時間:" + getCurrentTime();
} else{
mTotalAngle = 240f;
}
startAnim();
}
最后
這篇文章只分析了新版的實現(xiàn)過程,舊版的的實現(xiàn)思路也差不多,代碼也不復雜,可以直接看源碼實現(xiàn),由于本人文章寫的不多,所以感覺把代碼的實現(xiàn)用語言來組織還真挺難的,所以寫的不好的地方還請各位大大見諒,有問題可聯(lián)系我,最后希望如果覺得還可以的,請給個star, 謝謝啦.
