本文整理匯總了Java中android.support.v4.view.MotionEventCompat.ACTION_POINTER_DOWN屬性的典型用法代碼示例。如果您正苦於以下問題：Java MotionEventCompat.ACTION_POINTER_DOWN屬性的具體用法？Java MotionEventCompat.ACTION_POINTER_DOWN怎麽用？Java MotionEventCompat.ACTION_POINTER_DOWN使用的例子？那麽, 這裏精選的屬性代碼示例或許可以為您提供幫助。您也可以進一步了解該屬性所在類android.support.v4.view.MotionEventCompat的用法示例。
在下文中一共展示了MotionEventCompat.ACTION_POINTER_DOWN屬性的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: onTouchEvent
@Override
public boolean onTouchEvent(MotionEvent ev) {
final int action = MotionEventCompat.getActionMasked(ev);
if (isBackToStart && action == MotionEvent.ACTION_DOWN) isBackToStart = false;
switch (mType) {
case BOTTOM:
if (!isEnabled() || isBackToStart || canChildScrollDown() || isRefreshing) {
return false;
}
break;
case TOP:
default:
if (!isEnabled() || isBackToStart || canChildScrollUp() || isRefreshing) {
return false;
}
break;
}
switch (action) {
case MotionEvent.ACTION_DOWN:
mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
isReady = false;
break;
case MotionEvent.ACTION_MOVE:
if (TouchActionMove(ev)) return false;
break;
case MotionEventCompat.ACTION_POINTER_DOWN:
final int index = MotionEventCompat.getActionIndex(ev);
mActivePointerId = MotionEventCompat.getPointerId(ev, index);
break;
case MotionEventCompat.ACTION_POINTER_UP:
onSecondaryPointerUp(ev);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL: {
return TouchActionCancel(ev);
}
}
return true;
}
示例2: onInterceptTouchEvent
@Override
public boolean onInterceptTouchEvent(MotionEvent e) {
final int action = MotionEventCompat.getActionMasked(e);
final int actionIndex = MotionEventCompat.getActionIndex(e);
switch (action) {
case MotionEvent.ACTION_DOWN:
mScrollPointerId = MotionEventCompat.getPointerId(e, 0);
mInitialTouchX = (int) (e.getX() + 0.5f);
mInitialTouchY = (int) (e.getY() + 0.5f);
return super.onInterceptTouchEvent(e);
case MotionEventCompat.ACTION_POINTER_DOWN:
mScrollPointerId = MotionEventCompat.getPointerId(e, actionIndex);
mInitialTouchX = (int) (MotionEventCompat.getX(e, actionIndex) + 0.5f);
mInitialTouchY = (int) (MotionEventCompat.getY(e, actionIndex) + 0.5f);
return super.onInterceptTouchEvent(e);
case MotionEvent.ACTION_MOVE: {
final int index = MotionEventCompat.findPointerIndex(e, mScrollPointerId);
if (index < 0) {
return false;
}
final int x = (int) (MotionEventCompat.getX(e, index) + 0.5f);
final int y = (int) (MotionEventCompat.getY(e, index) + 0.5f);
if (getScrollState() != SCROLL_STATE_DRAGGING) {
final int dx = x - mInitialTouchX;
final int dy = y - mInitialTouchY;
final boolean canScrollHorizontally = getLayoutManager().canScrollHorizontally();
final boolean canScrollVertically = getLayoutManager().canScrollVertically();
boolean startScroll = false;
if (canScrollHorizontally && Math.abs(dx) > mTouchSlop && (Math.abs(dx) >= Math.abs(dy) || canScrollVertically)) {
startScroll = true;
}
if (canScrollVertically && Math.abs(dy) > mTouchSlop && (Math.abs(dy) >= Math.abs(dx) || canScrollHorizontally)) {
startScroll = true;
}
return startScroll && super.onInterceptTouchEvent(e);
}
return super.onInterceptTouchEvent(e);
}
default:
return super.onInterceptTouchEvent(e);
}
}