Save instance state in android compound component From http://www.charlesharley.com/2012/programming/views-saving-instance-state-in-android/

custom_component.java

protected Parcelable onSaveInstanceState() {
    Parcelable superState = super.onSaveInstanceState();
    return new SavedState(superState, numberPicker1.getValue(), numberPicker2.getValue(), numberPicker3.getValue());
}

@Override
protected void onRestoreInstanceState(Parcelable state) {
    SavedState savedState = (SavedState) state;
    super.onRestoreInstanceState(savedState.getSuperState());

    numberPicker1.setValue(savedState.getNumber1());
    numberPicker2.setValue(savedState.getNumber2());
    numberPicker3.setValue(savedState.getNumber3());
}

@Override
protected void dispatchSaveInstanceState(SparseArray container) {
    super.dispatchFreezeSelfOnly(container);
}

@Override
protected void dispatchRestoreInstanceState(SparseArray container) {
    super.dispatchThawSelfOnly(container);
}