public void setOnPatternCellAddedListener(OnPatternCellAddedListener onPatternCellAddedListener) {
        this.onPatternCellAddedListener = onPatternCellAddedListener;
    }
Set the call back for pattern cell added.

@param onPatternCellAddedListener The call back.
android-patternview/src/main/java/com/eftimoff/patternview/PatternView.java