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[fix] 修复在数据非常少的时候的滑动卡顿 #987

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[fix] 修复在数据非常少的时候的滑动卡顿 #987

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16 changes: 5 additions & 11 deletions wheelview/src/main/java/com/contrarywind/view/WheelView.java
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Original file line number Diff line number Diff line change
Expand Up @@ -670,11 +670,8 @@ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
@Override
public boolean onTouchEvent(MotionEvent event) {
boolean eventConsumed = gestureDetector.onTouchEvent(event);
boolean isIgnore = false;//超过边界滑动时，不再绘制UI。

float top = -initPosition * itemHeight;
float bottom = (adapter.getItemsCount() - 1 - initPosition) * itemHeight;
float ratio = 0.25f;

switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
Expand All @@ -690,13 +687,10 @@ public boolean onTouchEvent(MotionEvent event) {

// normal mode。
if (!isLoop) {
if ((totalScrollY - itemHeight * ratio < top && dy < 0)
|| (totalScrollY + itemHeight * ratio > bottom && dy > 0)) {
//快滑动到边界了，设置已滑动到边界的标志
totalScrollY -= dy;
isIgnore = true;
} else {
isIgnore = false;
if (totalScrollY < top) {
totalScrollY = (int) top;
} else if (totalScrollY > bottom) {
totalScrollY = (int) bottom;
}
}
break;
Expand Down Expand Up @@ -735,7 +729,7 @@ public boolean onTouchEvent(MotionEvent event) {
}
break;
}
if (!isIgnore && event.getAction() != MotionEvent.ACTION_DOWN) {
if (event.getAction() != MotionEvent.ACTION_DOWN) {
invalidate();
}
return true;
Expand Down