BaseViewGroup_override_method

BaseViewGroup.java

abstract public class BaseViewGroup extends FrameLayout{

    ...

    @Override
    protected void onRestoreInstanceState(Parcelable state) {
        if (!(state instanceof ChildSavedState)) {
            super.onRestoreInstanceState(state);
            return;
        }
        ChildSavedState ss = (ChildSavedState) state;
        super.onRestoreInstanceState(ss.getSuperState());
        onRestoreInstanceChildState(ss);
    }

    protected Parcelable onSaveInstanceChildState( ChildSavedState ss ){
        ss.childrenStates = new SparseArray();
        for( int i = 0; i < getChildCount(); i++ ){
            int id = getChildAt( i ).getId();
            if( id != 0 ){
                SparseArray childrenState = new SparseArray();
                getChildAt( i ).saveHierarchyState( childrenState );
                ss.childrenStates.put( id, childrenState );
            }

        }
        return ss;
    }

    private void onRestoreInstanceChildState( ChildSavedState ss) {
        for (int i = 0; i < getChildCount(); i++) {
            int id = getChildAt(i).getId();
            if (id != 0) {
                if (ss.childrenStates.get(id) != null) {
                    SparseArray childrenState = (SparseArray) ss.childrenStates.get(id);
                    getChildAt(i).restoreHierarchyState(childrenState);
                }
            }
        }
    }
    ...
}