Increase the anti-jitter threshold for status bar flings.

You must move the panel at least 20dp overall, or at a speed
of 150dp/sec or more (actually quite easy; most normal
flings are 500dp/s or more) for it to be considered a fling.

Bug: 7179458
Change-Id: Ic1f4edc641cd2aa1cde89b2ee02eefdf5a0cc044

Author: dsandler

packages/SystemUI/res/values/dimens.xml

@@ -103,16 +103,16 @@
     <!-- Initial velocity of the shade when collapsing on its own -->
     <dimen name="self_collapse_velocity">2000dp</dimen>
     <!-- Minimum final velocity of gestures interpreted as expand requests -->
-    <dimen name="fling_expand_min_velocity">200dp</dimen>
+    <dimen name="fling_expand_min_velocity">100dp</dimen>
     <!-- Minimum final velocity of gestures interpreted as collapse requests -->
-    <dimen name="fling_collapse_min_velocity">200dp</dimen>
+    <dimen name="fling_collapse_min_velocity">100dp</dimen>
     <!-- Cap on contribution of x dimension of gesture to overall velocity -->
     <dimen name="fling_gesture_max_x_velocity">200dp</dimen>
     <!-- Cap on overall resulting fling speed (s^-1) -->
     <dimen name="fling_gesture_max_output_velocity">3000dp</dimen>
 
     <!-- Minimum distance a fling must travel (anti-jitter) -->
-    <dimen name="fling_gesture_min_dist">10dp</dimen>
+    <dimen name="fling_gesture_min_dist">20dp</dimen>
 
     <!-- Minimum fraction of the display a gesture must travel, at any velocity, to qualify as a
          collapse request -->

packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java

@@ -267,7 +267,7 @@ public boolean onTouch(View v, MotionEvent event) {
                             // preventing spurious flings due to touch screen jitter
                             final float deltaY = Math.abs(mFinalTouchY - mInitialTouchY);
                             if (deltaY < mFlingGestureMinDistPx
-                                    || vel < mFlingGestureMinDistPx) {
+                                    || vel < mFlingExpandMinVelocityPx) {
                                 vel = 0;
                             }