RTEditor/src/main/java/com/onegravity/rteditor/RTManager.java
public void onSaveInstanceState(Bundle outState) {
        outState.putString("mToolbarVisibility", mToolbarVisibility.name());
        outState.putBoolean("mToolbarIsVisible", mToolbarIsVisible);
        outState.putInt("mActiveEditor", mActiveEditor);
        if (mLinkSelection != null) {
            outState.putSerializable("mLinkSelection", mLinkSelection);
        }
    }
public void onSaveInstanceState(Bundle outState) {
        outState.putString("mToolbarVisibility", mToolbarVisibility.name());
        outState.putBoolean("mToolbarIsVisible", mToolbarIsVisible);
        outState.putInt("mActiveEditor", mActiveEditor);
        if (mLinkSelection != null) {
            outState.putSerializable("mLinkSelection", mLinkSelection);
        }
    }
Called to retrieve per-instance state before being killed so that the
state can be restored in the constructor.

@param outState Bundle in which to place your saved state.