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August 19, 2019 06:21
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| import android.animation.Animator | |
| import android.animation.ValueAnimator | |
| import android.content.Context | |
| import android.graphics.* | |
| import android.util.AttributeSet | |
| import android.view.View | |
| import android.view.animation.LinearInterpolator | |
| import androidx.core.content.res.use | |
| import ss.anoop.awesomeloaders.utils.dpToPx | |
| import kotlin.math.min | |
| private val TAG = "TwoArcLoader" | |
| class TwoArcLoader @JvmOverloads constructor( | |
| context: Context, | |
| attributeSet: AttributeSet? = null, | |
| private val styleAttrs: Int = 0, | |
| private val styleRes: Int = 0 | |
| ) : View(context, attributeSet, styleAttrs) { | |
| private val paint = Paint(Paint.ANTI_ALIAS_FLAG).apply { | |
| style = Paint.Style.STROKE | |
| strokeCap = Paint.Cap.ROUND | |
| } | |
| private var smallestDimen = 0f | |
| private val rectF = RectF(0f, 0f, 0f, 0f) | |
| private val path1 = Path() | |
| private val path2 = Path() | |
| private var cycleDuration = 1000L | |
| private val MIN_DIMENSION by lazy { | |
| dpToPx(32f, resources).toInt() | |
| } | |
| private var animator: Animator? = null | |
| private var rotationAngle = 0f | |
| init { | |
| if (null != attributeSet) { | |
| initAttrs(attributeSet) | |
| } | |
| } | |
| override fun onAttachedToWindow() { | |
| super.onAttachedToWindow() | |
| animator = ValueAnimator.ofFloat(0f, 360f).apply { | |
| duration = cycleDuration | |
| interpolator = LinearInterpolator() | |
| repeatCount = ValueAnimator.INFINITE | |
| repeatMode = ValueAnimator.RESTART | |
| startDelay = 0 | |
| addUpdateListener(::onAnimationUpdate) | |
| }.also { it.start() } | |
| } | |
| override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) { | |
| val width = if (MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY) { | |
| MeasureSpec.getSize(widthMeasureSpec) | |
| } else { | |
| MIN_DIMENSION | |
| } | |
| val height = if (MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.EXACTLY) { | |
| MeasureSpec.getSize(heightMeasureSpec) | |
| } else { | |
| MIN_DIMENSION | |
| } | |
| setMeasuredDimension(width, height) | |
| } | |
| override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) { | |
| super.onSizeChanged(w, h, oldw, oldh) | |
| smallestDimen = min(width, height).toFloat() | |
| rectF.apply { | |
| left = paint.strokeWidth / 2 | |
| top = left | |
| bottom = smallestDimen - top | |
| right = smallestDimen - top | |
| } | |
| val paddingSide = (width - smallestDimen.toInt()) / 2 | |
| val paddingTop = (height - smallestDimen.toInt()) / 2 | |
| setPadding(paddingSide, paddingTop, paddingSide, paddingTop) | |
| path1.addArc(rectF, 0f, 120f) | |
| path2.addArc(rectF, 180f, 120f) | |
| } | |
| override fun onDraw(canvas: Canvas) { | |
| canvas.apply { | |
| translate(paddingLeft.toFloat(), paddingTop.toFloat()) | |
| rotate(rotationAngle, width / 2f, height / 2f) | |
| drawPath(path1, paint) | |
| drawPath(path2, paint) | |
| } | |
| } | |
| override fun onDetachedFromWindow() { | |
| super.onDetachedFromWindow() | |
| animator?.cancel() | |
| } | |
| private fun initAttrs(attributeSet: AttributeSet) { | |
| context.obtainStyledAttributes(attributeSet, R.styleable.TwoArcLoader, styleAttrs, styleRes) | |
| .use { | |
| paint.color = it.getColor(R.styleable.TwoArcLoader_strokeColor, Color.BLACK) | |
| paint.strokeWidth = | |
| it.getDimension(R.styleable.TwoArcLoader_strokeWidth, dpToPx(2f, resources)) | |
| cycleDuration = it.getInteger(R.styleable.TwoArcLoader_cycleDuration, 1000).toLong() | |
| } | |
| } | |
| private fun onAnimationUpdate(valueAnimator: ValueAnimator) { | |
| rotationAngle = valueAnimator.animatedValue as Float | |
| invalidate() | |
| } | |
| } |
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