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Fix crash when zoomed and try to swipe to next page

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tarsin committed 2022-12-16 22:07:09 +08:00
1 parent dce1589c19
commit 9cb683dc55
1 file changed
+3 -1
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app/src/main/java/com/davemorrissey/labs/subscaleview/SubsamplingScaleImageView.kt
+3 -1
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@@ -476,8 +476,10 @@ open class SubsamplingScaleImageView @JvmOverloads constructor(
private fun setGestureDetector(context: Context) {
detector = GestureDetector(context, object : GestureDetector.SimpleOnGestureListener() {
@Suppress("SENSELESS_COMPARISON")
override fun onFling(e1: MotionEvent, e2: MotionEvent, velocityX: Float, velocityY: Float): Boolean {
if (panEnabled && isReady && vTranslate != null && (abs(e1.x - e2.x) > 50 || abs(e1.y - e2.y) > 50) && (abs(velocityX) > 500 || abs(velocityY) > 500) && !isZooming) {
// The e1 can be null, that's weird and cause crash
if (panEnabled && isReady && vTranslate != null && e1 != null && e2 != null && (abs(e1.x - e2.x) > 50 || abs(e1.y - e2.y) > 50) && (abs(velocityX) > 500 || abs(velocityY) > 500) && !isZooming) {
val vTranslateEnd = PointF(vTranslate!!.x + velocityX * 0.25F, vTranslate!!.y + velocityY * 0.25F)
val sCenterXEnd = (width / 2 - vTranslateEnd.x) / scale
val sCenterYEnd = (height / 2 - vTranslateEnd.y) / scale