Example usage for android.view VelocityTracker clear

Introduction

In this page you can find the example usage for android.view VelocityTracker clear.

Prototype

public void clear() 

Source Link

Document

Reset the velocity tracker back to its initial state.

Usage

From source file:Main.java

public static void velocityTrackerPointerUpCleanUpIfNecessary(MotionEvent ev, VelocityTracker tracker) {

    // Check the dot product of current velocities.
    // If the pointer that left was opposing another velocity vector, clear.
    tracker.computeCurrentVelocity(1000, mMaximumFlingVelocity);
    final int upIndex = ev.getActionIndex();
    final int id1 = ev.getPointerId(upIndex);
    final float x1 = tracker.getXVelocity(id1);
    final float y1 = tracker.getYVelocity(id1);
    for (int i = 0, count = ev.getPointerCount(); i < count; i++) {
        if (i == upIndex)
            continue;

        final int id2 = ev.getPointerId(i);
        final float x = x1 * tracker.getXVelocity(id2);
        final float y = y1 * tracker.getYVelocity(id2);

        final float dot = x + y;
        if (dot < 0) {
            tracker.clear();
            break;
        }/*ww w.j a  va 2 s .com*/
    }
}

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