break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
- if (mCurrView == null) {
- break;
- }
- mVelocityTracker.computeCurrentVelocity(1000 /* px/sec */, getMaxVelocity());
- float velocity = getVelocity(mVelocityTracker);
+ if (mCurrView != null) {
+ float maxVelocity = MAX_DISMISS_VELOCITY * mDensityScale;
+ mVelocityTracker.computeCurrentVelocity(1000 /* px/sec */, maxVelocity);
+ float escapeVelocity = SWIPE_ESCAPE_VELOCITY * mDensityScale;
+ float velocity = getVelocity(mVelocityTracker);
+ float perpendicularVelocity = getPerpendicularVelocity(mVelocityTracker);
+
+ float translation = getTranslation(mCurrView);
+ // Decide whether to dismiss the current view
+ boolean childSwipedFarEnough = DISMISS_IF_SWIPED_FAR_ENOUGH &&
+ Math.abs(translation) > 0.4 * getSize(mCurrView);
+ boolean childSwipedFastEnough = (Math.abs(velocity) > escapeVelocity) &&
+ (Math.abs(velocity) > Math.abs(perpendicularVelocity)) &&
+ (velocity > 0) == (translation > 0);
+ boolean falsingDetected = mCallback.isAntiFalsingNeeded();
+
+ if (mFalsingManager.isClassiferEnabled()) {
+ falsingDetected = falsingDetected && mFalsingManager.isFalseTouch();
+ } else {
+ falsingDetected = falsingDetected && !mTouchAboveFalsingThreshold;
+ }
+
+ boolean dismissChild = mCallback.canChildBeDismissed(mCurrView)
+ && !falsingDetected && (childSwipedFastEnough || childSwipedFarEnough)
+ && ev.getActionMasked() == MotionEvent.ACTION_UP;
- if (!handleUpEvent(ev, mCurrView, velocity, getTranslation(mCurrView))) {
- if (isDismissGesture(ev)) {
+ if (dismissChild) {
// flingadingy
- dismissChild(mCurrView, swipedFastEnough() ? velocity : 0f);
+ dismissChild(mCurrView, childSwipedFastEnough ? velocity : 0f);
} else {
// snappity
mCallback.onDragCancelled(mCurrView);
return (int) (mFalsingThreshold * factor);
}
- private float getMaxVelocity() {
- return MAX_DISMISS_VELOCITY * mDensityScale;
- }
-
- protected float getEscapeVelocity() {
- return SWIPE_ESCAPE_VELOCITY * mDensityScale;
- }
-
- protected boolean swipedFarEnough() {
- float translation = getTranslation(mCurrView);
- return DISMISS_IF_SWIPED_FAR_ENOUGH && Math.abs(translation) > 0.4 * getSize(mCurrView);
- }
-
- protected boolean isDismissGesture(MotionEvent ev) {
- boolean falsingDetected = mCallback.isAntiFalsingNeeded();
- if (mFalsingManager.isClassiferEnabled()) {
- falsingDetected = falsingDetected && mFalsingManager.isFalseTouch();
- } else {
- falsingDetected = falsingDetected && !mTouchAboveFalsingThreshold;
- }
- return !falsingDetected && (swipedFastEnough() || swipedFarEnough())
- && ev.getActionMasked() == MotionEvent.ACTION_UP
- && mCallback.canChildBeDismissed(mCurrView);
- }
-
- protected boolean swipedFastEnough() {
- float velocity = getVelocity(mVelocityTracker);
- float perpendicularVelocity = getPerpendicularVelocity(mVelocityTracker);
- float translation = getTranslation(mCurrView);
- boolean ret = (Math.abs(velocity) > getEscapeVelocity()) &&
- (Math.abs(velocity) > Math.abs(perpendicularVelocity)) &&
- (velocity > 0) == (translation > 0);
- return ret;
- }
-
- protected boolean handleUpEvent(MotionEvent ev, View animView, float velocity,
- float translation) {
- return false;
- }
-
public interface Callback {
View getChildAtPosition(MotionEvent ev);