Android实现可拖拽带有坐标尺进度条的示例代码

    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec)
        val heightMode = MeasureSpec.getMode(heightMeasureSpec)
        var windowHeight = heightMeasureSpec
        if (heightMode == MeasureSpec.AT_MOST) {
            windowHeight = mDefaultHeight.toInt()//默认的高度
        }
        setMeasuredDimension(widthMeasureSpec, windowHeight)
    }

onTouchEvent(event: MotionEvent?): Boolean {
        super.onTouchEvent(event)
        //如果为true直接返回，不进行拖拽
        if (mProgressIsIntercept) {
            return mProgressIsIntercept
        }
        when (event?.action) {
            MotionEvent.ACTION_DOWN -> {
                parent.requestDisallowInterceptTouchEvent(mDisallowIntercept)
                val downX = getChangeX(event.x)
                val startX = mMoveOldX - mProgressMarginLeftRight
                val endX = mMoveOldX + mProgressMarginLeftRight
                return downX in startX..endX
            }
            MotionEvent.ACTION_MOVE -> {
                //移动
                var moveX = getChangeX(event.x)
                //滑动至最右边
                //计算最后边的坐标
                val viewWidth = getViewWidth()
                if (moveX >= viewWidth) {
                    moveX = viewWidth
                }
                mMoveProgress = moveX
                invalidate()
            }
            MotionEvent.ACTION_UP -> {
                //手指谈起
                mMoveOldX = getChangeX(event.x)
                val viewWidth = getViewWidth()
                if (mMoveOldX >= viewWidth) {
                    mMoveOldX = viewWidth
                }
            }
        }
        return true
    }

 /**
     * AUTHOR:AbnerMing
     * INTRODUCE:绘制背景
     */
    private fun canvasBackground(canvas: Canvas) {
        mPaint!!.color = mProgressBackground
        val rect = RectF().apply {
            left = mProgressMarginLeftRight
            top = mProgressMarginTopBottom
            right = width.toFloat() - mProgressMarginLeftRight
            bottom = mProgressHeight + mProgressMarginTopBottom
        }
        canvas.drawRoundRect(rect, mProgressRadius, mProgressRadius, mPaint!!)
    }

 /**
     * AUTHOR:AbnerMing
     * INTRODUCE:绘制离散间隔
     */
    private fun canvasIntervalLine(canvas: Canvas, isCanvas: Boolean) {
        val rect =
            (width - mProgressMarginLeftRight * 2 - mIntervalParentLeftRight * 2) / mIntervalSize
        if (isCanvas) {
            mPaint!!.color = mIntervalSelectColor
        } else {
            mPaint!!.color = mIntervalColor
        }
        mPaint!!.strokeWidth = mIntervalWidth
        for (a in 0..mIntervalSize) {
            val x = (rect * a) + mProgressMarginLeftRight + mIntervalParentLeftRight
            val y = mIntervalMarginTopBottom + mProgressMarginTopBottom
            canvas.drawLine(
                x,
                y,
                x,
                mProgressHeight + mProgressMarginTopBottom - mIntervalMarginTopBottom,
                mPaint!!
            )
        }
    }

 /**
     * AUTHOR:AbnerMing
     * INTRODUCE:绘制移动的图标
     */
    private fun canvasMoveIcon(canvas: Canvas) {
        mProgressThumb?.let {
            var decodeResource = BitmapFactory.decodeResource(resources, it)
            mProgressThumbWidth = decodeResource.width
            if (mThumbWidth != 0f) {
                val height: Int = decodeResource.height
                // 设置想要的大小
                val newWidth = mThumbWidth
                val newHeight = mThumbHeight
                // 计算缩放比例
                val scaleWidth = newWidth / width
                val scaleHeight = newHeight / height
                // 取得想要缩放的matrix参数
                val matrix = Matrix()
                matrix.postScale(scaleWidth, scaleHeight)
                // 得到新的图片
                decodeResource =
                    Bitmap.createBitmap(decodeResource, 0, 0, width, height, matrix, true)
            }
            var mThumpLeft = mMoveProgress
            if (mThumpLeft < (mProgressThumbWidth / 2 - mIntervalParentLeftRight + mProgressThumbSpacing)) {
                mThumpLeft =
                    mProgressThumbWidth / 2 - mIntervalParentLeftRight + mProgressThumbSpacing
            }
            if (mThumpLeft > (getViewWidth() - mIntervalParentLeftRight + mProgressThumbSpacing)) {
                mThumpLeft = getViewWidth() - mIntervalParentLeftRight + mProgressThumbSpacing
            }
            canvas.drawBitmap(
                decodeResource, mThumpLeft, mThumbMarginTop, mIconPaint!!
            )
        }
    }

/**
     * AUTHOR:AbnerMing
     * INTRODUCE:绘制进度
     */
    private fun canvasMoveProgress(canvas: Canvas) {
        //为空
        if (mColorArray.isEmpty()) {
            mColorArray = intArrayOf(
                ContextCompat.getColor(context, R.color.text_ff3e3e93),
                ContextCompat.getColor(context, R.color.text_ff8548d2),
            )
        }
        val linearShader = LinearGradient(
            0f,
            0f,
            mMoveProgress + mProgressMarginLeftRight,
            mProgressHeight,
            mColorArray,
            floatArrayOf(0f, 1f),
            Shader.TileMode.CLAMP
        )
        mProgressPaint!!.shader = linearShader
        //等于0时
        val rect = RectF()
        rect.left = mProgressMarginLeftRight
        rect.top = mProgressMarginTopBottom
        rect.right = mMoveProgress + mProgressMarginLeftRight
        rect.bottom = mProgressHeight + mProgressMarginTopBottom
        canvas.drawRoundRect(rect, mProgressRadius, mProgressRadius, mProgressPaint!!)
        //计算比例
        mGraduationResult =
            ((mMoveProgress / getViewWidth()) * mMaxProgress).roundToInt()//(endProgress * mMaxProgress).roundToInt()
        if (mGraduationResult < 1) {
            mGraduationResult = if (mGraduationSectionZero) {
                0
            } else {
                1
            }
        }
        if (mGraduationResult >= mMaxProgress) {
            mGraduationResult = mMaxProgress
        }
        mMoveProgressCallback?.invoke(mGraduationResult)
    }

 /**
     * AUTHOR:AbnerMing
     * INTRODUCE:绘制离散间隔
     */
    private fun canvasIntervalLine(canvas: Canvas, isCanvas: Boolean) {
        val rect =
            (width - mProgressMarginLeftRight * 2 - mIntervalParentLeftRight * 2) / mIntervalSize
        if (isCanvas) {
            mPaint!!.color = mIntervalSelectColor
        } else {
            mPaint!!.color = mIntervalColor
        }
        mPaint!!.strokeWidth = mIntervalWidth
        for (a in 0..mIntervalSize) {
            val x = (rect * a) + mProgressMarginLeftRight + mIntervalParentLeftRight
            val y = mIntervalMarginTopBottom + mProgressMarginTopBottom
            canvas.drawLine(
                x,
                y,
                x,
                mProgressHeight + mProgressMarginTopBottom - mIntervalMarginTopBottom,
                mPaint!!
            )
            //绘制刻度值
            if (mIsGraduation && isCanvas) {
                if (mHideGraduationSectionCenter && (a != 0 && a != mIntervalSize)) {
                    //隐藏中间
                    continue
                }
                var graduation = a * mGraduationSection
                //是否从0开始记录
                if (graduation == 0 && !mGraduationSectionZero) {
                    graduation = 1
                }
                //如果移动到了，改变颜色
                if (mGraduationResult >= graduation && mGraduationResult < graduation + mGraduationSection) {
                    mGraduationPaint?.color = mGraduationSelectTextColor
                } else {
                    mGraduationPaint?.color = mGraduationTextColor
                }
                val text = graduation.toString()
                val rectText = Rect()
                mGraduationPaint!!.getTextBounds(text, 0, text.length, rectText)
                val textWidth = rectText.width()
                val textHeight = rectText.height()
                canvas.drawText(
                    text,
                    x - textWidth / 2,
                    mProgressHeight + mProgressMarginTopBottom * 2 + textHeight + mGraduationMarginTop,
                    mGraduationPaint!!
                )
            }
        }
    }

allprojects {
    repositories {
        maven { url "https://gitee.com/AbnerAndroid/almighty/raw/master" }
    }
}

dependencies {
    implementation 'com.vip:moveprogress:1.0.0'
}

 <com.vip.moveprogress.MoveProgress
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:ms_graduation_hide_center="true" />