How to use

withSavedInstanceState

method

in

com.mikepenz.fastadapter.FastAdapter

/**
 * re-selects all elements stored in the savedInstanceState
 * IMPORTANT! Call this method only after all items where added to the adapters again. Otherwise it may select wrong items!
 *
 * @param savedInstanceState If the activity is being re-initialized after
 *                           previously being shut down then this Bundle contains the data it most
 *                           recently supplied in Note: Otherwise it is null.
 * @return this
 */
public FastAdapter<Item> withSavedInstanceState(Bundle savedInstanceState) {
  return withSavedInstanceState(savedInstanceState, "");
}

  @Override
  public void run() {
    //add some dummy data
    mItemAdapter.add(ImageDummyData.getSimpleImageItems());
    //restore selections (this has to be done after the items were added
    mFastAdapter.withSavedInstanceState(savedInstanceState);
  }
}, 50);

/**
 * helper method to reset to the original drawerContent
 */
public void resetDrawerContent() {
  if (switchedDrawerContent()) {
    //set the new items
    setOnDrawerItemClickListener(originalOnDrawerItemClickListener);
    setOnDrawerItemLongClickListener(originalOnDrawerItemLongClickListener);
    setItems(originalDrawerItems, true);
    getAdapter().withSavedInstanceState(originalDrawerState);
    //remove the references
    originalOnDrawerItemClickListener = null;
    originalOnDrawerItemLongClickListener = null;
    originalDrawerItems = null;
    originalDrawerState = null;
    //if we switch back scroll back to the top
    mDrawerBuilder.mRecyclerView.smoothScrollToPosition(0);
    //show the stickyFooter and it's shadow again
    if (getStickyFooter() != null) {
      getStickyFooter().setVisibility(View.VISIBLE);
    }
    if (getStickyFooterShadow() != null) {
      getStickyFooterShadow().setVisibility(View.VISIBLE);
    }
    //if we currently show the accountHeader selection list make sure to reset this attr
    if (mDrawerBuilder.mAccountHeader != null && mDrawerBuilder.mAccountHeader.mAccountHeaderBuilder != null) {
      mDrawerBuilder.mAccountHeader.mAccountHeaderBuilder.mSelectionListShown = false;
    }
  }
}

if (!mAppended) {
  mAdapter.deselect();
  mAdapter.withSavedInstanceState(mSavedInstance, Drawer.BUNDLE_SELECTION);
  DrawerUtils.setStickyFooterSelection(this, mSavedInstance.getInt(Drawer.BUNDLE_STICKY_FOOTER_SELECTION, -1), null);
} else {
  mAdapter.deselect();
  mAdapter.withSavedInstanceState(mSavedInstance, Drawer.BUNDLE_SELECTION_APPENDED);
  DrawerUtils.setStickyFooterSelection(this, mSavedInstance.getInt(Drawer.BUNDLE_STICKY_FOOTER_SELECTION_APPENDED, -1), null);

fastAdapter.withSavedInstanceState(savedInstanceState);

fastAdapter.withSavedInstanceState(savedInstanceState);

fastAdapter.withSavedInstanceState(savedInstanceState);

fastAdapter.withSavedInstanceState(savedInstanceState);

fastAdapter.withSavedInstanceState(savedInstanceState);

mFastAdapter.withSavedInstanceState(savedInstanceState);

mFastAdapter.withSavedInstanceState(savedInstanceState);

mFastAdapter.withSavedInstanceState(savedInstanceState);