Android仿小米資訊安全中心檢測進度條效果_Android

模仿小米資訊安全中心檢測效果

廢話少說，咱們先上效果圖：

github地址： https://github.com/niniloveyou/GradeProgressView

這個效果的使用情境並不多，主要是各種檢測的時候，比如垃圾清理，手機安全檢測， 當然如果你不嫌棄這個效果醜， 也可以用作進度條。哈哈。

下面說點乾貨分析下這個效果怎麼實現：

拿到這個效果首先想想主要有哪些技術痛點：

1.進度條

2.中間的指標怎麼弄

1.進度條

有人說進度條還不容易嗎？ 就這樣寫：

mPaint.setPathEffect(new DashPathEffect(new float[]{dashWith, dashSpace}, 。。。));canvas.drawArc(mRectF, 135, 270, false, mPaint);mPaint.setColor(Color.WHITE);canvas.drawArc(mRectF, 135, degree, false, mPaint);

設定個PathEffect
然後畫個圓弧，給畫筆設定顏色然後根據進度，算出角度， 然後再畫出一個圓弧，覆蓋第一個圓弧的部分不就行了。廢話這麼多。
不過我想說的too young too simple. 當時我也是這樣想的，於是就實現吧！ 做好了先畫個50% （也就是第二個圓弧覆蓋第一個圓弧的一半）試試，不錯啊perfect看來是這樣的， 再來個30%試試尼瑪不對啊， 怎麼小格子沒有重合，有點錯位啊。MDZZ

後來想了一個簡單點的辦法，不覆蓋，畫兩個圓弧， 但是這兩個圓弧是對接起來的。 比如第一個圓弧，畫一半，第二個畫一半。

//draw background arccanvas.drawArc(mRectF, 135 + degree, 270 - degree, false, mPaint);//draw progress arccanvas.drawArc(mRectF, 135, degree, false, mProgressPaint);

2.中間的指標怎麼弄

先畫出指標的路徑

mPointerPath = new Path();mPointerPath.moveTo(centerX + pointRadius, centerY - 7);mPointerPath.lineTo(centerX + pointRadius, centerY + 7);mPointerPath.lineTo(mRectF.right - pointGap - lineWidth / 2,centerY);mPointerPath.lineTo(centerX + pointRadius, centerY - 7);mPointerPath.close();

在中心draw一個小圓
然後draw指標,這樣當畫布旋轉時指標自然也就旋轉了，不懂得要去看看canvas.save(), canvas.restore()的作用

 //draw pointercanvas.drawCircle(centerX, centerY, pointRadius,mInnerCirclePaint);canvas.save();canvas.rotate(135 + degree, centerX, centerY);canvas.drawPath(mPointerPath, mPointerPaint);canvas.restore();

下面上完整代碼：

package deadline.grade;import android.animation.ValueAnimator;import android.annotation.TargetApi;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.DashPathEffect;import android.graphics.Paint;import android.graphics.Path;import android.graphics.RectF;import android.os.Build;import android.support.annotation.IntRange;import android.util.AttributeSet;import android.util.Log;import android.view.View;import android.view.animation.AccelerateDecelerateInterpolator;/** * @author deadline * @time 2016/9/24 */public class GradeProgressView extends View { private static final String TAG = GradeProgressView.class.getSimpleName(); private static final int DEFAULT_PROGRESS_COLOR = Color.WHITE; private static final int DEFAULT_BACKGROUND_COLOR = 0x5AFFFFFF; private int mBackgroundColor = DEFAULT_BACKGROUND_COLOR; private int mProgressColor = DEFAULT_PROGRESS_COLOR; //進度條的每格線寬，間距，長度 private int dashWith = 4; private int dashSpace = 6; private int lineWidth = 60; //最外圈線的寬度和與進度條之間的間距 private int outLineWidth = 5; private int gapWidth = 25; //指標的線寬度， 半徑， 以及指標與進度條的間距 private int pointLineWidth = 10; private int pointRadius = 25; private int pointGap = 20; private int mProgress = 0; //外線 private RectF mOuterRectF; private Paint mOuterPaint; //進度條 private RectF mRectF; private Paint mPaint; private Paint mProgressPaint; //指標 private Paint mInnerCirclePaint; private Paint mPointerPaint; private Path mPointerPath; private float centerX; private float centerY; private ValueAnimator animator; private OnProgressChangeListener mListener; public GradeProgressView(Context context) { this(context, null); } public GradeProgressView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public GradeProgressView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); setup(); } @TargetApi(Build.VERSION_CODES.LOLLIPOP) public GradeProgressView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); } private void setup() { mRectF = new RectF(); mOuterRectF = new RectF(); mOuterPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mOuterPaint.setStrokeWidth(outLineWidth); mOuterPaint.setColor(mBackgroundColor); mOuterPaint.setStyle(Paint.Style.STROKE); mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mPaint.setStrokeWidth(lineWidth); mPaint.setColor(mBackgroundColor); mPaint.setStyle(Paint.Style.STROKE); mPaint.setPathEffect(new DashPathEffect(new float[]{dashWith, dashSpace}, dashSpace)); mProgressPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mProgressPaint.setStrokeWidth(lineWidth); mProgressPaint.setColor(mProgressColor); mProgressPaint.setStyle(Paint.Style.STROKE); mProgressPaint.setPathEffect(new DashPathEffect(new float[]{dashWith, dashSpace}, dashSpace)); mPointerPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mPointerPaint.setStrokeWidth(pointLineWidth / 2); mPointerPaint.setColor(mProgressColor); mPointerPaint.setStyle(Paint.Style.FILL_AND_STROKE); mPointerPaint.setStrokeCap(Paint.Cap.ROUND); mPointerPaint.setShadowLayer(4, 3, 0, 0x20000000); mInnerCirclePaint = new Paint(Paint.ANTI_ALIAS_FLAG); mInnerCirclePaint.setStrokeWidth(pointLineWidth); mInnerCirclePaint.setColor(mProgressColor); mInnerCirclePaint.setStyle(Paint.Style.STROKE); mInnerCirclePaint.setShadowLayer(4, 3, 0, 0x20000000); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); int value = outLineWidth / 2; mOuterRectF.set(value, value, w - value, h - value); int gap = lineWidth / 2 + outLineWidth + gapWidth; mRectF.set(mOuterRectF.left + gap,  mOuterRectF.top + gap,  mOuterRectF.right - gap,  mOuterRectF.bottom - gap); centerX = mRectF.centerX(); centerY = mRectF.centerY(); mPointerPath = new Path(); mPointerPath.moveTo(centerX + pointRadius, centerY - 7); mPointerPath.lineTo(centerX + pointRadius, centerY + 7); mPointerPath.lineTo(mRectF.right - pointGap - lineWidth / 2, centerY); mPointerPath.lineTo(centerX + pointRadius, centerY - 7); mPointerPath.close(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); float degree = 2.7f * mProgress; //draw out arc canvas.drawArc(mOuterRectF, 135, 270, false, mOuterPaint); //draw background arc canvas.drawArc(mRectF, 135 + degree, 270 - degree, false, mPaint); //draw progress arc canvas.drawArc(mRectF, 135, degree, false, mProgressPaint); //draw pointer canvas.drawCircle(centerX, centerY, pointRadius, mInnerCirclePaint); canvas.save(); canvas.rotate(135 + degree, centerX, centerY); canvas.drawPath(mPointerPath, mPointerPaint); canvas.restore(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int measureWidth = MeasureSpec.getSize(widthMeasureSpec); int measureHeight = MeasureSpec.getSize(heightMeasureSpec); setMeasuredDimension(Math.min(measureHeight, measureWidth), Math.min(measureHeight, measureWidth)); } public void setOnProgressChangeListener(OnProgressChangeListener listener){ this.mListener = listener; } public int getProgressColor() { return mProgressColor; } public void setProgressColor(int progressColor) { this.mProgressColor = progressColor; if(mProgressPaint != null){  mProgressPaint.setColor(mProgressColor); } if(mPointerPaint != null){  mPointerPaint.setColor(mProgressColor); } if(mInnerCirclePaint != null){  mInnerCirclePaint.setColor(mProgressColor); } postInvalidate(); } public int getBackgroundColor() { return mBackgroundColor; } public void setBackgroundColor(int backgroundColor) { this.mBackgroundColor = backgroundColor; if(mPaint != null){  mPaint.setColor(mBackgroundColor); } if(mOuterPaint != null){  mOuterPaint.setColor(mBackgroundColor); } postInvalidate(); } public int getLineWidth() { return lineWidth; } public void setLineWidth(int lineWidth) { this.lineWidth = lineWidth; if(mPaint != null){  mPaint.setStrokeWidth(lineWidth); } if(mProgressPaint != null){  mProgressPaint.setStrokeWidth(lineWidth); } postInvalidate(); } public int getOutLineWidth() { return outLineWidth; } public void setOutLineWidth(int outLineWidth) { this.outLineWidth = outLineWidth; if(mOuterPaint != null){  mOuterPaint.setStrokeWidth(outLineWidth); } postInvalidate(); } public int getGapWidth() { return gapWidth; } public void setGapWidth(int gapWidth) { this.gapWidth = gapWidth; } public int getProgress() { return mProgress; } public void setProgress(@IntRange(from = 0, to = 100) int progress) { if(progress > 100){  progress = 100; } if(progress < 0){  progress = 0; } this.mProgress = progress; if(mListener != null){  mListener.onProgressChanged(GradeProgressView.this, mProgress); } postInvalidate(); } public void setProgressWidthAnimation(@IntRange(from = 0, to = 100) int progress){ if(progress > 100){  progress = 100; } if(progress < 0){  progress = 0; } if(animator != null && animator.isRunning()){  animator.cancel();  animator = null; } animator = ValueAnimator.ofInt(mProgress, progress); int duration = 10 * Math.abs(progress - mProgress); animator.setDuration(duration); animator.setInterpolator(new AccelerateDecelerateInterpolator()); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {  @Override  public void onAnimationUpdate(ValueAnimator valueAnimator) {  int value = (int)valueAnimator.getAnimatedValue();  if(mProgress != value) {   mProgress = value;   if(mListener != null){   mListener.onProgressChanged(GradeProgressView.this, mProgress);   }   postInvalidate();  }  } }); animator.start(); } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); if(animator != null){  animator.cancel();  animator = null; } } public interface OnProgressChangeListener{ void onProgressChanged(GradeProgressView gradeProgressView, int progress); }}

以上就是本文的全部內容，希望對大家的學習有所協助，也希望大家多多支援雲棲社區。