Increase search radius for adjacent keys, to reduce unpredictability of

    private int[][] mGridNeighbors;

    private int mProximityThreshold;

    /** Number of key widths from current touch point to search for nearest keys. */

    private static float SEARCH_DISTANCE = 1.4f;

    private static float SEARCH_DISTANCE = 1.8f;

    /**

     * Container for keys in the keyboard. All keys in a row are at the same Y-coordinate.