SearchViewの虫眼鏡を押すとレイアウトがズレておかしくなる

MainActivity

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        setTab();
    }

    public void setTab() {
        FragmentTabHost tabHost = (FragmentTabHost)findViewById(android.R.id.tabhost); {
            tabHost.setup(this, getSupportFragmentManager(), R.id.container);

            TabHost.TabSpec productTab, cartTab, settingTab;

            productTab = tabHost.newTabSpec("Product");
            productTab.setIndicator("商品");
            tabHost.addTab(productTab, IPProductFragment.class, null);

            cartTab = tabHost.newTabSpec("Cart");
            cartTab.setIndicator("カート");
            tabHost.addTab(cartTab, IPCartFragment.class, null);

            settingTab = tabHost.newTabSpec("Setting");
            settingTab.setIndicator("設定");
            tabHost.addTab(settingTab, IPSettingFragment.class, null);

            tabHost.setOnTabChangedListener(this);
        }
    }

    @Override
    public void onTabChanged(String tabId) {
        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction transaction = fragmentManager.beginTransaction();

        switch (tabId) {
            case "Product":
                transaction.replace(R.id.container, new IPProductFragment());

                break;
            case "Cart":
                transaction.replace(R.id.container, new IPCartFragment());

                break;
            case "Setting":
                transaction.replace(R.id.container, new IPSettingFragment());

                break;
        }

        transaction.commit();
    }

////////////////////////////////////////////////////////////////////////////////////

public class IPProductFragment extends Fragment implements SearchView.OnQueryTextListener {
    private List<IPProductData> products = new ArrayList<>();
    private IPProductGridViewAdapter adapter;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_product, container, false);

        setHasOptionsMenu(true);

        setProducts();
        setSearchBar(v);
        setGridView(v);

        return v;
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);
    }

    public void setSearchBar(View v) {
        SearchView searchView = (SearchView)v.findViewById(R.id.searchView); {
            searchView.setIconifiedByDefault(true);
            searchView.setOnQueryTextListener(this);
            searchView.setSubmitButtonEnabled(false);
            searchView.setQueryHint("検索");
        }
    }

    public void setProducts() {
        IPProductData productData1 = new IPProductData(); {
            productData1.setProductImage(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher));
            productData1.setProductText("ハンバーガー");
        }
        IPProductData productData2 = new IPProductData(); {
            productData2.setProductImage(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher));
            productData2.setProductText("ポテト");
        }
        IPProductData productData3 = new IPProductData(); {
            productData3.setProductImage(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher));
            productData3.setProductText("コーラ");
        }
        IPProductData productData4 = new IPProductData(); {
            productData4.setProductImage(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher));
            productData4.setProductText("チキンナゲット");
        }

        products.clear();
        products.add(productData1);
        products.add(productData2);
        products.add(productData3);
        products.add(productData4);
    }

    public void setGridView(View v) {
        GridView gridView = (GridView)v.findViewById(R.id.gridViewProductItem); {
            adapter = new IPProductGridViewAdapter(getContext(), R.layout.gridview_item_product, products);
            gridView.setAdapter(adapter);
        }
    }

    @Override
    public boolean onQueryTextSubmit(String query) {
        return false;
    }

    @Override
    public boolean onQueryTextChange(String newText) {
        adapter.getFilter().filter(newText);

        return false;
    }
}

////////////////////////////////////////////////////////////////////////////////////

public class IPProductGridViewAdapter extends ArrayAdapter<IPProductData> {
    private LayoutInflater mLayoutInflater;

    public IPProductGridViewAdapter(Context context, int resource, List objects) {
        super(context, resource, objects);

        mLayoutInflater = LayoutInflater.from(context);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        if (convertView == null) {
            convertView = mLayoutInflater.inflate(R.layout.gridview_item_product, null);
        }

        ImageView productImageView = (ImageView)convertView.findViewById(R.id.imageViewProductGridView); {
            productImageView.setImageBitmap(IPProductGridViewAdapter.this.getItem(position).getProductImage());
        }
        TextView productTextView = (TextView)convertView.findViewById(R.id.textViewProductGridView); {
            productTextView.setText(IPProductGridViewAdapter.this.getItem(position).getProductText());
        }

        return convertView;
    }
}

////////////////////////////////////////////////////////////////////////////////////

public class IPProductData {
    private Bitmap mProductImage;
    private String mProductText;

    public Bitmap getProductImage() {
        return mProductImage;
    }

    public String getProductText() {
        return mProductText;
    }

    public void setProductImage(Bitmap productImage) {
        this.mProductImage = productImage;
    }

    public void setProductText(String productText) {
        this.mProductText = productText;
    }
}